- test-drb@ccmp.vtda.org - classiccmp.org

by aek＠spies.com

the design of having to change backplane wiring for certain cards seems to be rather... ummmm silly -- this dates back to the days when a DMA interface wouldn't fit into a single SPC (small peripheral controller) board. at least they eventually produced G7273 unibus grant jumpers which aren't little nasty tear-the-back-of-your-hand-off boards like the G727's are, and have both BR and bus grant jumpers on them. These were standard in 11/44's, weren't they? so your SPC slots shouldn't have the bus grant jumpers on them..

23 years, 2 months

3
2
0 0

Heathkit H89 Intro

by mr＠jasongullickson.com

I recently acquired what I believe to be a Heathkit H89. It was assembled a long time ago by my friend's father, contains a single disk drive and a monochrome terminal. My ultimate goal would be to get this thing running CPM and a C compiler, but first I need to figure out if it's working. I've yet to determine if it has a hard or soft-sectored disk controller, but I have some general questions since I don't have any documentation. First, where can I get some documentation? ; ) Second, when I turn the machine on, all I get is a blinking cursor. If I depress the "offline" key, I can type characters on the terminal accompanied by a short beep; if the "offline" key is not depressed, I get long beeps and nothing on the display. What "should" it do when I turn it on with no disk in the drive? I'll be happy to provide more info as I dig it up, but any introductory details on this system or references to websites, etc. would be greatly appreciated. Jason J. Gullickson mr(a)jasongullickson.com

23 years, 2 months

1
0
0 0

another free VAX in Germany

by Thilo.Schmidt＠unix-ag.org

Hi, Today I found a Microvax II that is waiting for the scrapper. The case contains 3 RDXXX HDs, a TK50, Ethernet and some serial line controllers. And of course the CPU and an unknown amount of memory. I don't know the part no. of the case but it is the one that is twice as wide as the BA23 and has wheels. Seems to be in perfect condition. If anyone is interested I will roll it to a save place. It has to be gone during the weekend... It is located in 57068 Siegen, Germany and free for *pickup* only. bye Thilo

23 years, 2 months

4
4
0 0

interesting find

by Thilo.Schmidt＠unix-ag.org

Hi, Last week I found something which I think may be an ancient NVRAM Module. Sadly I couldn't find any useful information on the web, except on this page: http://www.iser.uni-erlangen.de:8980/iser/servlet/Anzeigen45?inventarnummer… It uses rather large magnetic rods to store data (4x25mm). The PCB is dated 1972 and it was probably used in a Nixdorf-Computer. It's called Staebchenspeicher in german (maybe rod-memory in english?). Does anyone have further information on this module? bye Thilo

23 years, 2 months

6
6
0 0

Atari ST Help

by alhartman＠yahoo.com

Hi Curt! Yes, I know about that site, but they want WAY too much money for a used adapter for an old computer. You would think that at this point, they'd be about $20.00 or so, since I can buy whole ST's for about that price. I just can't justify spending $150.00 or more to put a hard drive on a $20.00 computer. I just want to play... So, I'll keep looking. Maybe I'll spot something cheap on eBay or at the Trenton Computer Festival in May. AERCO was a small Texas company that made little gadgets for the Atari ST, Amiga and Timex/Sinclair computers. When I worked for Zebra Systems, Inc. We sold their products... Regards, Al > From: "Curt Vendel" <curt(a)atarimuseum.com> > Date: Wed, 5 Feb 2003 10:13:41 -0500 > > Hi Al, > > Never heard of that particular memory board > before, don't know where you can get a manual. > For a HD you can go to www.myatari.com and buy > a "ICD LINK" Adapter which will give your DMA/ASCI > port full SCSI capabilities, also ask them about > ExtenDOS Gold, its a drivers disk that will allow > the TOS to recognize and use CD-ROM drives too, they > also have a large selection of ST software on > CDROM's > > > > Curt

23 years, 2 months

5
7
0 0

HP 7980S's at Boeing Surplus

by kyrrin＠bluefeathertech.com

Hey, gang, Those of you in the Puget Sound area, or near enough to it to get to Kent, WA with a minimum of hassle, may be interested to know that there are three HP 7980S SCSI 9-track tape drives at Boeing Surplus, $50.00 Ea. They look like they were pulls from a big HP mini. Enjoy! -=-=-=-=-=-=-=-=-=-=-=-=-=-=- Bruce Lane, Owner & Head Hardware Heavy, Blue Feather Technologies -- http://www.bluefeathertech.com ARS KC7GR (Formerly WD6EOS) since 12-77 -- kyrrin(a)bluefeathertech.com "I'll get a life when someone demonstrates that it would be superior to what I have now..." (Taki Kogoma, aka Gym Z. Quirk)

23 years, 2 months

1
0
0 0

Need PDP-8 Flip Chip modules

by vcf＠siconic.com

I am in need of the following Flip Chip modules: R302 (3) R604 (2) R002 S111 (7) S602 (2) R210 (8) If you have any spares that you wouldn't mind trading or selling away, please contact me directly <vcf(a)vintage.org>. Thanks! -- Sellam Ismail Vintage Computer Festival ------------------------------------------------------------------------------ International Man of Intrigue and Danger http://www.vintage.org * Old computing resources for business and academia at www.VintageTech.com *

23 years, 2 months

5
4
0 0

Epson HX-40 ???

by gwynn＠powwwer.net

Cord try doing a Google search using PX-4 as the search, which is the basic p/n for that unit (PX-4/HX-40) . I did and came up with all kinds of info, including a site that lets you ftp download a bunch of rom ifo (Like the BASIC rom). Good luck. GWW

23 years, 2 months

1
0
0 0

Home to remove monumental grime?

by vcf＠siconic.com

Can anyone suggest a safe way to remove grime that is so old and so thick that the only way to remove it is to rub it off with your bare fingers? I slathered this board in contact cleaner and it didn't do anything. The grime just remained. If I rub it with my bare fingers then it will eventually start to rub off and leave little remainders like pencil eraser droppings. Any ideas? -- Sellam Ismail Vintage Computer Festival ------------------------------------------------------------------------------ International Man of Intrigue and Danger http://www.vintage.org * Old computing resources for business and academia at www.VintageTech.com *

23 years, 2 months

8
7
0 0

Heathkit H89 Intro

by dwightk.elvey＠amd.com

>From: knightstalkerbob(a)netscape.net > >"Jason J. Gullickson" <mr(a)jasongullickson.com> wrote: > >>I recently acquired what I believe to be a Heathkit H89. It was >>assembled a long time ago by my friend's father, contains a single disk >>drive and a monochrome terminal. >> >>My ultimate goal would be to get this thing running CPM and a C >>compiler, but first I need to figure out if it's working. >> >>I've yet to determine if it has a hard or soft-sectored disk controller, >>but I have some general questions since I don't have any documentation. Hi Sorry, I lost the first message. One can tell if it is hard or soft sectored by the controller card. The hard sectored has a uart ( or usart ) chip and the soft sectored has one of the typical FD controller chips. I think it may have been a Western Digital that they used. The other problem is that CPM requires RAM at the lower addresses. You'll need to make the modification that allows one to shadow the ROM. I suspect that it is either on this groups archives or you might look in the news group comp.os.cpm. I've seen it talked about someplace. Dwight

23 years, 2 months

1
0
0 0

ELT-320 working! (was Re: Who here has a Planar ELT-320?)

by erd_6502＠yahoo.com

--- Tom Uban <uban(a)ubanproductions.com> wrote: > Sorry, but my hard drive crashed and my DSL went down, both in the same > week and unrelated... Thanks for responding (but between a helpful post on classiccmp from Mark Roberts and cracking mine open to meg it out myself, I'm up and running ;-). I put a 12V switcher I got at Dayton for about $5 in an ancient and long empty external 400K Mac drive case (belonged to my mother when the drive inside died over 12 years ago) and wired it up to a C-64 drive cable half I got from the thrift store (someone spliced their own extension cable in the middle by twisting the wires and encasing it all in PVC tape :-P ) Worked the first time. So now I'll have an flat-screen terminal powered by a PSU in a Mac drive case, talking to a portable PDP-8 in an Amiga drive case. Guess I should post some pictures of that. :-) -ethan

23 years, 2 months

1
0
0 0

Home to remove monumental grime?

by Edward.Tillman＠valero.com

23 years, 2 months

5
4
0 0

Information, Dokumentation about the HP7974A 9-track tapedrive

by asholz＠topinform.com

Hello all, I got an HP7974A 9-track Tape. Is there anyone on this list who has some documentation about this tape. Esp. I'm interested in servicing informations, schematics and manuals. As I already often noticed with other tapedrives it's drive capstan has turned to goo. Has someone hints or experiences in repairing the rubber of a tape capstan. Andreas

23 years, 2 months

9
11
0 0

Fw: [OT ... but ...] RS/6000 stuff in Munich - go and get it !

by rschaefe＠gcfn.org

Saw this on spamnet news. No association, replys to original author, etc., etc., etc. Bob ----- Original Message ----- From: "" <> Newsgroups: comp.sys.ibm.ps2.hardware Sent: Wednesday, February 12, 2003 6:17 PM Subject: [OT ... but ...] RS/6000 stuff in Munich - go and get it ! > Hi ! > > Recently I got a mail from Florian Wolf (wolf -at- ingeniq.de), who offered > RS/6000 machines for those capable to lug them home. He doesn't give the > Models, but one is a -55L (big server - 7012 I would say) with CD and tape, two > are desktops -370 (7012 too I think) and one -43P (?). All are in good order, > look complete and have E(i)thernet cards inside. > > They have to move latest at the end of next week or else they are crapped. > > Leave me a note or write or write Florian in direct mail. And: you *need* to be > capable to pick them up in Munich. Arrangements *might* be possible like for > instance to pick them up at Florians place and not where they are now - but > that's matter of individual negotiations.

23 years, 2 months

1
0
0 0

Philips P5003 = Micom 2001

by lgwalker＠mts.net

I tracked down some new info on the Micom (which I've blathered about before). On the great NL computer site : Allard's computermuseum Groningen http://drake.nl/computermuseum/philips/p5003.html is a new(?) addition, the Philips P5003. It is basicly a copy of the Micom 2001 which Philips had acquired when they bought a big chunk of the Canadian company Micom The 2001 was the next model after the original 2000 (which was introduced in 76) and differed in that it had an attached keyboard. The boards in the P5003, which came out in 79/80, are basicly the same as in the 2000 and are even labeled as such. They can be compared with those on Bill Sudbrinks site. http://wsudbrink.dyndns.org:8080/osi/micom2000.html The Groningen site also has a nice shot of another canadian machine. An AES which is credited with being the first programmable wordprocessor and was a previous start-up by Stephen Dorsey who also founded Micom. Lawrence lgwalker@ mts.net

23 years, 2 months

1
0
0 0

Designing around a 6502 (was Re: Assembly on a Apple IIc+)

by Lee.Davison＠merlincommunications.com

Why? You don't need to have a MMU for multi tasking. MMUs are ment for virtual addressing which is a complete different concept. They are also used for address translation and memory protection. Both usefull functions in a multitasking system and both needed to implement virtual memory Lee. ________________________________________________________________________ This e-mail has been scanned for all viruses by Star Internet. The service is powered by MessageLabs. For more information on a proactive anti-virus service working around the clock, around the globe, visit: http://www.star.net.uk ________________________________________________________________________

23 years, 2 months

4
6
0 0

Differential SCSI vs. SE ?

by mail.list＠analog-and-digital-solutions.com

Pat, The CMD CQD-420/TM design uses a daughter card of which there is a single-ended version and a differential version. The differential version should actually be a little less expensive because most users want the single-ended, and the cost of getting a single-ended daughter card to replace the differential one is expensive. Therefore perhaps better supply and lower demand for differential. I DON'T HAVE ANY OF THESE ANYMORE. THEY WERE SOLD, to a buyer in the mid-west. But you can find them searching Google. But even the differential ones still are more than all but the most exceptional hobbyist would want to get in to. Best Regards At 06:52 PM 2/12/03 -0500, you wrote: >On Wed, 12 Feb 2003, Fred N. van Kempen wrote: > > > All, > > > > Now that I inherited a nice set of StorageWorks enclusures with > > an HSZ40C controller, I might as well use it, no? I plan on > > connecting it to the primary file server of my "fun" network > > (also known as VAXlab, aka pdp11.nl) so I'll have more (and safer) > > storage there. > > > > Only prob is.. the HSZ40C has a diff-scsi port, whereas the machines > > have SE. > > > > Is this easily converted with a cable, or will I be doing resistor- > > balancing and/or use a signal converter box? > >It can't be done with just passive components.. ie you will need either a >differential<->single-ended converter or a differential SCSI card. If >you're using a machine that takes PCI cards, then a card will be cheaper, >but if you're using it with a VAX or PDP-11, etc, I'm doubtful you'll find >a differential-scsi interface, and will need to buy an interface box. > >If you need/want a PCI wide/differential SCSI card, I have several Adaptec >AHA-3944AUWD's (with PC BIOS ROMs) that I would be willing to sell at a >'reasonable' price (probably $40 + shipping). > >As far as 'converter boxes' go, I don't know what one would cost, because >I've never had to buy one. > >Pat >-- >Purdue Universtiy ITAP/RCS >Information Technology at Purdue >Research Computing and Storage >http://www-rcd.cc.purdue.edu

23 years, 2 months

1
0
0 0

Differential SCSI vs. SE ?

by healyzh＠aracnet.com

> Only prob is.. the HSZ40C has a diff-scsi port, whereas the machines > have SE. > > Is this easily converted with a cable, or will I be doing resistor- > balancing and/or use a signal converter box? Look for a Paralan SE-to-Diff converter box. Zane

23 years, 2 months

1
0
0 0

Differential SCSI vs. SE ?

by Fred.van.Kempen＠microwalt.nl

> You would need a different SCSI card. Try telling a VAX 4000-100A that :) > As you probably know, the HSZ -> storage scsi is > all SE, just the port back to the host is differential. Yup.. and I could either find a signal converter then, or perhaps the DSSI port adapter for the HSZ40 .. --f

23 years, 2 months

1
0
0 0

Who here has a Planar ELT-320?

by glenslick＠hotmail.com

Looks like an interesting item for a total of $11 including shipping. But does that include the keyboard? Neither this listing nor the last one I saw on eBay showed a picture of a keyboard nor explicitly stated that a keyboard was included as far as I could see. Do these ELT320 terminals use a standard interface keyboard that is easy to replace if you get one without a keyboard? >From: Ethan Dicks <erd_6502(a)yahoo.com> >Reply-To: cctalk(a)classiccmp.org >To: cctalk(a)classiccmp.org >Subject: Who here has a Planar ELT-320? >Date: Sun, 9 Feb 2003 18:15:23 -0800 (PST) > >Second time around, I won an ELT-320 on ePay... _________________________________________________________________ MSN 8 with e-mail virus protection service: 2 months FREE* http://join.msn.com/?page=features/virus

23 years, 2 months

4
4
0 0

Home to remove monumental grime?

by pete＠dunnington.u-net.com

On Feb 12, 7:47, Philip Pemberton wrote: > > Wasn't there a thread a while back in which someone mentioned washing > > circuit boards in a dishwasher? > I know Lee Davison's done it. Only catch is, you may have to replace a few > components after cleaning it - electrolytics, etc. If you have to replace electrolytics after washing, there was something wrong with the electrolytics before you started. They're routinely washed commercially. There are other sorts of components that may be damaged by washing, though. > Electrolube "Fluxclene" and straight IPA are quite good. I've used 70% IPA > to remove light dirt from PCBs, Fluxclene is insanely aggressive. It doesn't > fizz or bubble, but it removes nearly anything - it's intended to be used to > remove solder flux. And it leaves most components and plastics intact. It will certainly work, but if the board is very dirty, you'll still need to wash it in clean water (and possibly detergent) afterwards to get rid of the residues, and then get rid of the water (IPA, compressed air, whatever). Kitchen worktop cleaner is much cheaper and works just as well. -- Pete Peter Turnbull Network Manager University of York

23 years, 2 months

1
0
0 0

DEC xx2247 keys

by lemay＠cs.umn.edu

I bought a xx2247 key from ebay. Just in case others are planning to do the same, the key appears to be an almost brand new copy. There is a *slight* amount of rust in the areas that were cut away, but other than that it is nice shiny new chrome. I purchased mine for the starting bid of $10, but they then charged me $10 more for shipping (actual shipping was $4.30), making for an expensive key. I called the local locksmith and they will duplicate this type of key for $6 each. The other thing to note is that the key I obtained from Ebay auction is stamped Do Not Duplicate, which the original DEC keys (I have 2) do not say. I figure they had a original copied a few years back, and added the Do Not Duplicate just in case a customer needed more than 1 key, so they would have to pay through the nose for it. Now I see they have the starting bid boosted to $25, for a non-original duplicate key, what a load of... PS: I happen to have the locking mechanism disconnected from a PDP 8/E power supply, and before i reinstall it, i plan to bring it and the keys to that locksmith so i can have some cheaper, 'working' copies of the key made. I like having a key sitting in the lock ready to turn. If others need a key, let me know and i'm sure I can get you one for a lot less than that ebay guy. -Lawrence LeMay

23 years, 2 months

2
1
0 0

VCF Gazette Volume 1, Issue 4

by vcf＠siconic.com

VCF Gazette Volume 1, Issue 4 A Newsletter for the Vintage Computer Festival February 12, 2003 Hello Vintage Computer Fans! There is exciting news in this issue, with yet another Apple-1 auction brought to you by the Vintage Computer Festival. In this issue: Apple-1 Auction VCF Europa 4.0 VCF East Update VCF Archives: On The Move VintageTech Punch Card Conversion Services Latest Additions to the VCF Archives Apple-1 Auction --------------- The Vintage Computer Festival, which has accidentally gained a reputation as the premier auctioneer of Apple-1 computers, is at it again. We are proud to announce our third Apple-1 auction! The Apple-1 we are currently auctioning is the finest example yet. It includes a wooden enclosure that neatly bundles the keyboard, power supply and Apple-1 board together into a nice, tidy unit. Information about the Apple-1, including information on how to register as a bidder, can be found here: http://www.vintage.org/special/2003/apple-1/ If you've been looking for an Apple-1 to add to your collection, this is your chance! VCF Europa 4.0 -------------- The fourth annual Vintage Computer Festival Europa is being held on May 3rd and 4th at the Mehrzweckhalle des ESV M?nchen Ost in Munich, Germany. VCF co-producer Hans Franke hosts another fine event that brings together Europe's most celebrated old machines. Lectures, exhibits, and some damn good German beer (served onsite!) await you. More information on VCF Europa 4.0 can be found here: http://www.vcfe.org/ Join us for some geeky fun, European style! VCF Archives: On The Move ------------------------- As of the last issue of the VCF Gazette, we announced our plans to open our VCF Archives to the public by the end of 2002. Well, fate, as always, has dealt an unexpected hand. The Alameda County Computer Resource Center, which graciously hosts the VCF Archives, abruptly announced in late November their intention to move into a new facility in Berkeley, California. As of this writing, the ACCRC is now in the midst of transitioning its operations into the new facility. The new facility in Berkeley is not as large as the Oakland facility, and so there is no room to set up the complete VCF Archives there. The VCF will have a small computer history exhibit in the corner of the new community center that the ACCRC is building to allow the local public access to computers and the internet. In the meantime, the ACCRC has concluded negotiations on a 42,000 square foot facility at the old Oakland Army Base in Oakland, California (only a few miles away from the existing location). This facility will be used primarily by the ACCRC for processing computer and electronics scrap that is received for recycling. The plan is for the VCF to move its archives to this facility and operate its publicly accessible archive from this location. The net effect for the VCF is that we are probably still about six months away from being able to offer our entire archives for public consumption. The move, while mildly inconvenient, is a strategic and necessary step by the ACCRC to grow its operations, and the VCF sees this as an opportunity to grow our own operations as well. The ACCRC is fully committed to hosting the VCF Archives, and the VCF is fully committed to supporting and promoting the ACCRC, which is probably the most successful and prolific non-profit organization in the world that distributes computer technology free of charge to deserving entities and individuals around the globe. Your support of the Alameda County Computer Resource Center is greatly welcomed and appreciated. You can read all about this fine organization at their website: http://www.accrc.org If you have the means, please consider sending them a donation. You might even consider volunteering your time. Their website contains complete donation and volunteer information. VCF East 2.0 Update ------------------- VCF East 2.0 is still in the planning stages. Our primary focus right now is locating a proper venue. Our focus continues to be on the Boston metropolitan area, which presents the most convenient prospects for staging VCF East. We will hopefully have a venue selected within 2 weeks, and will announce a date for VCF East 2.0 sometime in June. VCF East 2.0 is being planned according to a very tight budget. This is the first VCF that is being completely planned and budgeted in advance. This is out of necessity, due to the continuing prevailing economic conditions that make it difficult to run any business, let alone a short term function such as the Vintage Computer Festival. We must strictly adhere to this budget in order to make VCF Eeast 2.0 happen. We realize that many people are looking forward to VCF East 2.0 and we apologize for the continuing delays. However, we feel we are close to announcing a date and location. As soon as we have the information we'll be sure to make an immediate announcement so that attendees and exhibitors can make plans. So please, stay tuned! VintageTech Punch Card Conversion Services ------------------------------------------ VintageTech, the VCF off-shoot that provides old computer technology and services to business and academia, has recently gotten one of the VCF's old punch card readers working. The reader is a Documation M200, and even at nearly 30 years old it's still capable of reading 200 cards per minute, its top speed. The reader's interface, being meant to connect directly to a specific punch card reader controller in a DEC or other mini-computer, has no "modern" equivalent. In order to get the data from the reader to a PC, an converter needed to be built. We used what we knew: an Apple //e. The output of the reader can be considered to be 12-bit, since there are 12 data holes on a punch card. There are also several signal outputs that tell the host machine if there was a problem (such as a card getting stuck in the reader). Our Apple //e is fitted with a custom-built parallel interface card with 20 inputs. The data and signal inputs from the reader were wired into a special harness to fit the parallel card. Software to control the reader and decode the punch card data was developed on the Apple //e. As the data is read on the //e, it is sent over a serial port to a PC, where the data can then be saved to modern media for preservation. Reading punch card data into a PC involves two steps: first, the data on the card, as represented by the holes punched into it, must be decoded; second, that data, which can be stored in any one of over a dozen encodings, must be converted to ASCII. Punch cards evolved from the first machines that Herman Hollerith invented to conduct the 1890 census count for the United States. As punch card technology evolved, so did punch card character sets. Special symbols such as punctuation were added to the basic character set consisting of letters and numbers. Eventually, character set standards evolved. IBM, which for the most part pioneered punch card technology, had two common sets: "FORTRAN", used for FORTRAN program coding, and "Commercial", used for encoding general data. In each of these character sets, only a few minor punctuation characters have different encodings. The letters and numbers are encoded the same. Decoding punch card data is a matter of interpreting the holes. First of all, data is encoded on punch cards in columns. There are 80 columns on a typical punch card, and each column contains one encoded character. In fact, this 80 column width is the reason why computer terminals, and subsequently personal computers, usually had a screen width of 80 characters: it was a throw back to the punch card! Across the punch card there are 12 rows. The rows are numbered 1 through 9, and then 0, 11, 12. Encoding a number is simple. To encode a '5' for example, the 5 row is punched in a column. To encode a '0', the 0 row is punched. It's as simple as that. The rows 0, 11, and 12 are called "zones", and are used to encode letters and puncutation symbols. So for instance, to punch an 'A' character, the 12 hole and the 1 hole are punched. A 'B' is the 12 hole and the 2 hole, a 'C' is the 12 hole and the 3 hole, and so on, all the way up to 12 and 9, which is an 'I'. At that point, the alphabet continues in the next zone, which is 11. So 11 and 1 is 'J', 11 and 2 is 'K', etc. Finally, the alphabet ends at 0 and 9, which is 'Z'. Some characters are encoded by punching more than one hole. The most common special characters are encoded by punching the 3 and 8 or 4 and 8 holes and then one of the zones (0, 11 or 12). Some crazy character sets, like IBM's EBCDIC, can have up to 5 holes being punched to represent one character (usually a special control character). As the punch cards are whisked through the reader, the hole punches are sent over the interface to the Apple //e, which then interprets the data according to a character set table in memory that is used to decode the data from punch card codes into ASCII. That character is then flung over the serial port to a waiting PC that then captures and stores the data to a file. A typical 2000 card deck, representing 2000 lines of code or data (or 160,000 bytes maximum), can be read in about 10 minutes. By comparison, the Apple //e could read an entire 143K disk in under 6 seconds. And a typical PC today can devour that amount of data in less than a millisecond. How times have changed... A lot of useful programs and data are locked away on old punch cards. If you or someone you know has such data and would like to have it recovered, please visit VintageTech to inquire about our punch card data conversion services. VintageTech can also read and convert just about any old media format into a modern format. http://www.vintagetech.com Latest Additions to the VCF Archives ------------------------------------ Some cool new stuff has made its way into the VCF Archives. Here are the highlights: o Unassembled Ohio Scientific Superboard II kit (circa 1982) o LNW Research Corporation LNW80 (TRS-80 Model 1 clone) A long time ago, the VCF used to maintain what we called the "Recent Acquisitions Report" (RAR). This was a list of all the latest goodies that were found while out and about hunting for old computers. The RAR is defunct now, but the old entries are still up. In case anyone is interested in reviewing the old reports, you can find them here: http://www.vintage.org/vcf98/rar.htm The RAR as it stands represents one and a half years of VCF collecting efforts. The collection has of course continued to grow since then. You can check out the specs of the VCF Archives here: http://www.vintage.org/archive.php That wraps it up for this issue of the VCF Gazette! Until next time... Best regards, Sellam Ismail Producer Vintage Computer Festival http://www.vintage.org/ The Vintage Computer Festival is a celebration of computers and their history. The VCF Gazette goes out to anyone who subscribed to the VCF mailing list, and is intended to keep those interested in the VCF informed of the latest VCF events and happenings. The VCF Gazette is guaranteed to be published in a somewhat irregular manner, though we will try to maintain a quarterly schedule. If you would like to be removed from the VCF mailing list, and therefore not receive any more issues of the VCF Gazette, visit the following web page: http://www.vintage.org/remove.php PEACE ;) -- Sellam Ismail Vintage Computer Festival ------------------------------------------------------------------------------ International Man of Intrigue and Danger http://www.vintage.org * Old computing resources for business and academia at www.VintageTech.com *

23 years, 2 months

1
0
0 0

Need weight of hopper weight thingy for Documation card reader

by vcf＠siconic.com

You know the thingy that sits on top of the stack of punch cards and pushes them down into the hopper of a punch card reader? I need the weight of that thing for a Documation M200 reader. I'm using the weight from a Documation D150 and it just doesn't work right. Bonus points for telling me what this is called ;) Thanks! -- Sellam Ismail Vintage Computer Festival ------------------------------------------------------------------------------ International Man of Intrigue and Danger http://www.vintage.org * Old computing resources for business and academia at www.VintageTech.com *

23 years, 2 months

3
2
0 0

Nice CPUs (was: Virtual vs Physical memory (was Re: Designing around a 6502 ))

by dwightk.elvey＠amd.com

>From: "Hans Franke" <Hans.Franke(a)mch20.sbs.de> > >> >> > A segmented architecture... >> >> I have one word to say about segmented architecture... "Ewwwww" > >> >:) I like segmented systems. It's one of the best concepts for >> >address space extension. Ok, I also think that the 8086 is one >> >of the best 16 Bit CPUs (*1) ever, and as the 186 core at the > >> Then you'll love the Z8000. Its segments are non-overlapping >> ( unless a mmu makes them so ). > >I never had a problem with overlaping. Programming is always >a matter of diszipline, and well written code never accesses >unassigned data :) > >The Z8000 was always a bit weired. a nice design, but weired. >Ok, I never programmed it, only thinking around when I had to >choose a processor for a system around 1980. The candidates >where 16016, 68000, Z8000, 8086 and 9900. >The 8086 droped out because of the complicated bus structure, >the 9900 because 64K where not enough, otherwise it would have >been my choice (and the 99000 wasn't realy available). So the >finalists where National vs. Motorola vs. Zilog. After all, >the NS16000 did offer the best extensibility, a complete and >beliveable family model and a real nice and clean programming >model. So 16016 it was. > >> I like the 186 myself but have to admit that the time for >> segmented memory has passed, in general purpose computing. > >Well, define general purpose computing. In my eyes this >describes real computers ... ala IBMish Mainframes, and >Segmented memory never had a place there. When going for >small systems, the 186 is still one of the best CPUs to >use. Powerfull, fast, simple and high integrated. I don't >know anything which can't be done in a megabyte of mem. Hi Hans We agree here. The only hard part of working with the 186's is getting the init sequence debugged. Once that is done they are great. I don't think that I've ever written a program that took more than about 35K ( not counting data space ). Then again, most of the larger programs I've written were in Forth so it is hard to compare. Dwight > >Gruss >H. > >-- >VCF Europa 4.0 am 03./04. Mai 2003 in Muenchen >http://www.vcfe.org/

23 years, 2 months

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IMS INTERNATIONAL S-100 80186 CPU board

by classiccmp＠crash.com

This seller has an (apparently) large stock of these IMS slave CPU boards and has been slowly getting rid of them on eBay. No complaints, though I didn't realize it was a slave as opposed to standalone CPU board when I picked up a pair. Haven't found any info on them, but I'm not looking all that hard either. --Steve.

23 years, 2 months

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IMS INTERNATIONAL S-100 80186 CPU board

by rigdonj＠cfl.rr.com

Somewbody was asking about one of these a few weeks ago. Well there's another one for sale on E-bay. It's at <http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=1247&item=3401323596>. But again there are no docs. Joe

23 years, 2 months

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Home to remove monumental grime?

by pete＠dunnington.u-net.com

On Feb 11, 18:49, Vintage Computer Festival wrote: > Can anyone suggest a safe way to remove grime that is so old and so thick > that the only way to remove it is to rub it off with your bare fingers? > > I slathered this board in contact cleaner and it didn't do anything. The > grime just remained. If I rub it with my bare fingers then it will > eventually start to rub off and leave little remainders like pencil eraser > droppings. Don't use contact cleaner. Proper contact cleaner contains oil. It's not nearly as bad as WD40, but you don't really want the board covered in a flm of oil. If it's just one board, try washing it in warm water with some washing-up liquid (dishwashing detergent). If the grime is that stubborn, assist the process with a dishwashing brush. Rinse well, dry carefully (shake off or blow off as much water as possible, use some IPA to help remove the water). If you're in an area with very hard water, the final rinse before the IPA might best be done with distilled or deionised water. Don't dry the boards flat, the object is to let as much water (and any minerals dissolved in it) as possible to drain off. Make sure the board is thoroughly dry, which may take a day or two, especially if there are switches or sockets on it, before you try to use it. If that's too much like hard work, or you have a lot of boards to clean, consider using the dishwasher. That's what's used commercially (at least, for small-scale stuff). However, DON'T let it do the drying cycle (too hot for some things) and don't use the dishwasher if the board contains anything that might suffer: transformers, relays (unless hermetically sealed), paper labels that must be preserved, anything with extremely fine wires (core mats), etc. I've been told some very old ICs (grey type) don't like being immersed in hot water. I've never had a problem with that, but YMMV. Some old types of compressed paper boards (Paxolin) may not like the dishwasher either. Same rules apply about drying. -- Pete Peter Turnbull Network Manager University of York

23 years, 2 months

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Home to remove monumental grime?

by Edward.Tillman＠valero.com

Sorry about the date... Not only did I get it wrong, but posted it in the US convention... In your terms, it would be 2/9/01, A Sunday, at @ 00:15, CST (GMT -5). Cheers... Ed Tillman Store Automation Tech Support Specialist Valero Energy Corporation San Antonio, TX; USA Phone (210) 592-3110, Fax (210) 592-2048 edward.tillman(a)valero.com <mailto:edward.tillman@valero.com> > -----Original Message----- > From: cctalk-admin@classiccmp.org@PEUSA On Behalf Of Sellam > Ismail <foo(a)siconic.com> > Sent: Wednesday, February 12, 2003 12:11 AM > To: 'cctalk(a)classiccmp.org' > Subject: RE: Home to remove monumental grime? > > On Tue, 11 Feb 2003, Tillman, Edward wrote: > > > From what are you trying to remove the grime? > > A very precious board, so anything not extraordinarily safe is right out. > > > - Pencil erasers work in a multitude of places, on a multitude of > things... > > This would probably be the best bet. In the meantime I used a paper towel > to rub the board where the grime was and it did a decent job, but there is > still a layer of film. > > > **Watch-out rubbing it off with your bare fingers: you can generate ESD > > (static electricity) and fry sensitive circuits/components! > > I removed all the ICs from their sockets. > > > [Note: Water may actually be one of the LEAST harmful cleaners! On > > 11/2/01, a week before the WTC debacle, my primary network server system > > Then that would've been 4/9/01, yes? ;) > > Sellam Ismail Vintage Computer > Festival > -------------------------------------------------------------------------- > ---- > International Man of Intrigue and Danger > http://www.vintage.org > > * Old computing resources for business and academia at > www.VintageTech.com * [demime 1.01a removed an attachment of type application/ms-tnef]

23 years, 2 months

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What's better than canned air?

by cb＠mythtech.net

>> At first I filled my tank at my fire house off our breathing air >> compressor, but that got to be a pain, so I bought a small air compressor >> (also at Sears, also about $40) > >You mean one of those small, tankless compressors? I went to Sears last >night, and the cheapest tank-equipped compressor they had was $180. >Considering the potential cheapness of used scuba gear, that's way too much >to pay for air. Anyway, I'd always thought that those little compressors >weren't all that great. Am I wrong? Correct, a tankless compressor. The type sold for filling car tires or whatever. The one I have is pretty good considering the price, but I can't use it directly to run my blowgun. I have to fill my storage tank, and run the blow gun off that. The reason is, the compressor will go to 250 PSI, but it starts at Zero and works its way up. So if I attach the blowgun directly to it, I never get more than about 1 or 2 PSI (whatever pressure it builds up from friction going thru the hose). But, the compressor works very well for filling my 12 gallon air tank to 200 PSI, which then works very well for running my blowgun at 10-60 PSI (depending on where I set the regulator). Although used SCUBA gear is a good cheap option, you have to consider how often you are going to fill it, and how much that is going to cost you. Remember, if you pay $180 for a tank/compressor at Sears, that's it. From then on out, compressed air is more or less free (electricity to power the compressor, and maintenance costs). With a SCUBA tank, you might buy the tank and regulator for under $100, but you will pay for each refill (unless you know someone that has a 3000 PSI compressor... if you are friends with a fireman, ask if their department can do it, we do for friends and the occasional resident if they ask nicely, but then not all FDs have their own breathing air compressor, and fewer have the attachments for filling SCUBA gear) If you figure $8 each, your last $80 is used up in 10 fillings. Not to mention the time/effort/annoyance to have to fill it when it runs out at the worst possible time. But if you don't fill the bottle offen (those bottles hold a LOT of air at 1 atmosphere), then SCUBA might be the cheaper, and certainly quieter option. -chris <http://www.mythtech.net>

23 years, 2 months

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What is a HP 98029A Resource Management Interface?

by Innfogra＠aol.com

Well, this is not in my 1981, 82, 84 or 85 HP catalogs. I was wondering what resource it manages, what it plugs into? Any info out there on this? Anyone have a 1983 HP catalog they could check? or maybe a 1980? It works with the HP 9825, 9835 & 9845 series of computers from the early 1980s. On the other end is an Amphenol 50 pin female connector, similar to early SCSI 1 connectors. Pictures at: http://members.aol.com/innfosale/ebay/98029A1A.JPG http://members.aol.com/innfosale/ebay/98029A1B.JPG Any help would be appreciated. Thanks a lot. Paxton Astoria, OR

23 years, 2 months

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Looking for info on Honeywell core memory

by erikb＠digischool.nl

Can anybody tell me more about this core memory assembly ? The assembly consists of three wire-wrapped "BICM9" backplanes, one of these holds four 8K x 9 core memory boards, the other two contain several modules with names like "M9INH", "M9SNS" and "M9SEL". Logic on the various boards appears to be mixed TTL/DTL (!) in standard DIL packages, most boards are from 1972. Pictures: http://www.digischool.nl/~erikb/identify.html Thanks in advance, Erik.

23 years, 2 months

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Who here has a Planar ELT-320?

by erd_6502＠yahoo.com

Second time around, I won an ELT-320 on ePay... unfortunately, this one has no PSU. Could one of the owners of one on this list e-mail me the pinouts? From the auction I _didn't_ win, it appears that it takes +12VDC @ 2.5A. The question is how/where. The picture seems to suggest that's it's via a DIN-5 connector at the corner of the back side. Thanks for any help. -ethan

23 years, 2 months

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New Find: SGI Iris 4D/80

by pete＠dunnington.u-net.com

On Feb 11, 15:07, Patrick Finnegan wrote: > I picked up an Iris 4D/80 'deskside' monster, sans drives, with digital > video I/O capabilites and 'analog' video output and 'VTR' control today > from Purdue Salvage. I don't have a whole lot of documentation on the > system (well, basically none), and about all I do know is that the > processor board seems to be filled with RAM and it has BNC jacks on the > back panel for connection to a monitor. > > Can anyone tell me what versions of IRIX might work with this system > and/or where to pick up a copy? I'd love to see if I could get this thing > running again. It should be capable of running IRIX 5.3, but unless it's unusual and has more than 16MB of RAM, you'd be better off with 4.0.5 (last version was 4.0.5f). Also the graphics may not be supported fully in 5.3, depending on what options you've got. A useful place to start looking for information is the 4DFAQ (also known as "This Old SGI") which you'll find at http://www.geocities.com/SiliconValley/Pines/2258/4dfaq.html Don't forget the comp.sys.sgi.* newsgroups, there are a few people there who either have or fondly remember the 4D series and can help. Look on Ebay (yes, really) for IRIX. 5.3 is more common than 4.0.5 but they do appear fom time to time. I have a 4.0.5 CD which I'd offer to copy, but some kind soul scratched it rather badly and it won't read now :-( -- Pete Peter Turnbull Network Manager University of York

23 years, 2 months

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New Find: SGI Iris 4D/80

by pat＠purdueriots.com

I picked up an Iris 4D/80 'deskside' monster, sans drives, with digital video I/O capabilites and 'analog' video output and 'VTR' control today >from Purdue Salvage. I don't have a whole lot of documentation on the system (well, basically none), and about all I do know is that the processor board seems to be filled with RAM and it has BNC jacks on the back panel for connection to a monitor. Can anyone tell me what versions of IRIX might work with this system and/or where to pick up a copy? I'd love to see if I could get this thing running again. Thanks, Pat -- Purdue Universtiy ITAP/RCS Information Technology at Purdue Research Computing and Storage http://www-rcd.cc.purdue.edu

23 years, 2 months

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cctalk digest, Vol 1 #391 - 45 msgs

by alhartman＠yahoo.com

The problem with this is that you are totally ignoring the owners rights in this. You are treating a program like physical property when it isn't. It is Intellectual Property. If you do not purchase a license from the author to use his work, you are not entitled to own it. Whether you have made a copy so that nobody else is deprived of their copy is immaterial. Something is lost by him/her. His/her rights to control the distribution of his/her work. If you don't want to buy it, then you shouldn't have it. If you say "F" you, I'm going to take one anyway... What's the point in having copyright/ownership laws? If the laws aren't used, respected and enforced.. eventually people will decide not to create cool stuff because most people will "copy" it (and in your concept, since they won't buy it anyway... No harm is being done...), and the author will recieve little to no compensation for his work. So, those people will decide to do something where they will get paid. If you consistently rob a store, eventually it will go out of business, and you won't have anything to rob anymore, not to mention... Actually buy something you need.... So there is HUGE harm in stealing software by copying it. Most pirates won't admit to it, because then they'd have to admit they are bad people, stealing >from someone/everyone... This is all elementary business/copyright law. Not an opinion. It's the basis of all copyright law. Regards, Al __________________________________________________ Do you Yahoo!? Yahoo! Mail Plus - Powerful. Affordable. Sign up now. http://mailplus.yahoo.com

23 years, 2 months

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Who here has a Planar ELT-320?

by ken＠seefried.com

I've got a couple of ELT-320s. The PS brick says Model PSA-124, input 110v-240v(a)1.5A, output 12v(a)4.2A. From: Ethan Dicks <erd_6502(a)yahoo.com> > I know there's others here and on the SBC6120 list that are also > looking for them now. Hopefully the supply will continue to trickle > them out now and then. Hmmm...I'm in on the sbc6120. I was actually thinking of building it into a terminal case...

23 years, 2 months

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Disk drive head locking (DEC RA-82 and HP 7920)

by GOOI＠oce.nl

Hi Dan. AFAI can tell from memory, you do the following. 1) find the opening in the front that is a little larger than the other openings (for cooling). 2) Use a screwdriver to push the plate that is behind the opening mentioned in 1). 3) While that plate is pushed in, you can lift the top cover including the electronics of the RA82. 4) In the middle yoy see the large (black) cilinder thing. That is the HDA. When you stand in front of the drive you see a small lever at "6 o clock". Rotate that level 180 degrees to lock the heads. You must lift the level at the end a little to be able to rotate it. On the HDA is a text that tells you the position of the level. (At least, that is the case with my *RA81*. 5) At the right hand side, near the chassis plate of the drive is a handle. This handle releases/sets the drive belt free/tension to the HDA. I do not know if the tension should be released when you transport the drive. If you are not going to use the drive for say, several months, you could release the tension to prevent deforming (flatten) the drive belt at one location. Take care, RA82's are heavy, - Henk. > -----Original Message----- > From: Dan Veeneman [mailto:dan@ekoan.com] > Sent: vrijdag 7 februari 2003 23:04 > To: cctech(a)classiccmp.org > Subject: Disk drive head locking (DEC RA-82 and HP 7920) > > Hello, > > I'm scheduled to pick up a pair of DEC RA-82 drives along > with an HP 7920 drive in the next couple of weeks. > > I don't have any technical documentation for either of these > drives, but I'd be very interested in learning the proper > procedure for locking down the heads on these drives > prior to moving them. If anyone has the steps to take > for either or both of these drives, please drop me a note > or point me to the proper archive. > Cheers, > > Dan > www.decodesystems.com/wanted.html

23 years, 2 months

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Dan's Mystery chips

by Innfogra＠aol.com

Dan's Pics at http://www.decodesystems.com/old-ics.html The first white mystery chip is General Instruments ROM. A while back someone posted a link to an IC-IDentification database which I downloaded. It has helped me identify some of these older chip logos. The second mystery chip is an EPROM identical to the ones on a S50 card I just sold on ebay. http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=1247&item=2305518019 Mine were labeled as AMD with an unusual part number. I will leave the pics up for a while longer. Now to go look at Dan's want page.... Paxton Astoria, OR

23 years, 2 months

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Dan's Mystery chips

by Innfogra＠aol.com

In a message dated 2/10/03 11:03:12 PM Pacific Standard Time, philpem(a)dsl.pipex.com writes: > Would that happen to have been the IC-ID database program from my website? > Yes, it is. Sorry for the belated thanks but thanks. I use it occasionally and it has helped me identify some of the older chips like Dan's (and mine) General Instrument chips. Thanks for posting the link so long ago, too. Paxton Astoria, OR

23 years, 2 months

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asr 33 platen

by n8uhn＠yahoo.com

Good question, french dressing, nah - lol belt dressing - not sure if it even softens the belt but it does swell the belt. armor all - may work - might soften the platen - but it leaves a very slick coating - i wonder if the paper will stay in one place as the platen moves. the type "ball" hammer also has a rubber "button" that slips over it - i know those and the platen were once replacable - try a search for "teletype" on the web. i know the nadcomm meseum http://www.nadcomm.com/ has a link for teletype paper tape and paper on it. the nadcomm page links are near the bottom under the heading "Teletypewriter Supplies" Bill Date: Sat, 08 Feb 2003 14:51:14 -0700 From: ben franchuk <bfranchuk(a)jetnet.ab.ca> To: cctalk(a)classiccmp.org Subject: RE: asr 33 platen Reply-To: cctech(a)classiccmp.org George R. Gonzalez wrote: > I need some suggestions! Should I try ArmorAll (known to soften rubber, > given time), "Platen cleaner", "belt dressing", "french dressing", or what? I would try 'rubber renue' from M.G. Chemicals. Ben. --__--__--

23 years, 2 months

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VHS Tapes as storage.

by larry＠laurelnet.com

I believe it was Alpha Microsystems, and IIRC the PC version was sold through Radio Shack. I believe I may still have an old AM-610 (S-100) VCR interface board in the basement if anyone is interested (free to a good home)... Larry > -----Original Message----- > From: cctalk-admin(a)classiccmp.org > [mailto:cctalk-admin@classiccmp.org]On > Behalf Of Andrew Strouse > Sent: Monday, February 10, 2003 1:09 PM > To: cctalk(a)classiccmp.org > Subject: VHS Tapes as storage. > > > Hi, I seem to remember reading in popular electronics, about > software that > would let you use a vcr to backup your computer. I think it > was about 10 > years ago. Does anyone remember or know anything about this. > My searches on > google have turned up nothing. Thanks for any help you can provide! > > Andrew Strouse

23 years, 2 months

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PACEMIPPS? (and MIL-STD-1750A)

by ken＠seefried.com

> From: Joe <rigdonj(a)cfl.rr.com> > It says that the MIPPs ICs are standard MIPPs processors > but built to Mil-Standards. That would actually be MIPS processors. The MIPS architecture came out of Stanford and stands for (supposedly) "Microprocessor without Interlocking Pipeline Stages". >>I've actually got some Performance Semi 1750A chipsets...I must think of >>>something to do with them... > > I've got a few as well. I also just found a 1753 (MMU IIRC) Yup. > and 1754 (I/O interface IIRC). Usually called a PIC (peripheral interface controller). Let me know if you ever want to get rid of those...I have several complete chipsets, but can always use spares. > In case you'r enot aware of it, the 1750 is a "standard" > processor that the government is trying to use in all > aircraft and aerospace applications. Well...it was the standard a decade or two ago; the standard came out around 1980, AFAIK. I don't think that there has been a hard requirement for 1750A in military contracts for a long, long time. It's only a 16-bit processor, after all, and almost noone makes it any more (Performance doesn't). It, like the JOVIAL programming language often used to program it, are probably only around for maintenance and upgrades of existing platforms. Ken

23 years, 2 months

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cctalk digest, Vol 1 #449 - 55 msgs

by alhartman＠yahoo.com

I put "VCR Backup" into Yahoo!, and this came up... http://www.viscountvideo.com/danmere.htm Hope this helps.. Regards, Al > From: "Andrew Strouse" <kittstr(a)access-4-free.com> > To: <cctalk(a)classiccmp.org> > Subject: VHS Tapes as storage. > Date: Mon, 10 Feb 2003 13:09:15 -0500 > Reply-To: cctalk(a)classiccmp.org > > Hi, I seem to remember reading in popular > electronics, about software that > would let you use a vcr to backup your computer. I > think it was about 10 > years ago. Does anyone remember or know anything > about this. My searches on > google have turned up nothing. Thanks for any help > you can provide! > > Andrew Strouse

23 years, 2 months

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Eureka!

by rigdonj＠cfl.rr.com

Well I didn't find the Holy Grail but this is close! I went to a hamfest today and in a box of junk I found the operating program for the HP 9877 Mass Memory unit! That's the box that has up to four tape drives installed and was used to mass duplicate HP 9825 tapes at the HP factory. The 9877 is a rare bird and was only offered to the public for one year (1979 IIRC) but I've got two of the 9877s, Tony D has one and NASA KSC has one but NO ONE has been able to locate the operating program for it till now. The tape APPEARS to be in good condition but you know how HP tapes are :-( The full name of the tape is "Duplicator 9825A/9877" and it's part number is 09877-10002. Other INTERESTING finds (in the same box no less!) were a new DC-300A tape (as used on the IBM 5100 and Tektronix 4051), a Plot 50 tape and Plot 50 Backup tape and an Alignment tape. All three are for the Tektronix 4051 computer. Wahoo! A good ClassiComp day! Joe

23 years, 2 months

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What is a HP 98029A Resource Management Interface?

by fmc＠reanimators.org

Innfogra(a)aol.com wrote: > It works with the HP 9825, 9835 & 9845 series of computers from the early > 1980s. On the other end is an Amphenol 50 pin female connector, similar to > early SCSI 1 connectors. WAG from the name: it's a widget to connect a 98x5 into an HP Shared Resource Management (SRM) network. I vaguely recall that there was a coaxial SRM bus cable, and some SRM interfaces had the BNC connector for the bus cable while others had a 50-pin Amphenol connector and expected to have a transceiver-like device between the Amphenol connector and the coax. I've read about this stuff in manuals, but never used it or even seen it in use. And I didn't know you could hook a 98x5 up to it, my readings about it have been in the context of HP9000 series 200 and 300 systems. -Frank McConnell

23 years, 2 months

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NuTek One / DUET Mac Clone

by alhartman＠yahoo.com

I have a set of pages about this unit on my website... http://www.geocities.com/macemulist/nutek.html I'd like to buy one of these, if I can find one. If anyone on this list has one in any condition (hopefully working or repairable), please contact me off list... Basically, this was an attempt to clone the Mac including making a Clone OS. If you have one of these, I'd love to get copies of any floppies that came with it, manuals, and a dump of the ROMS even if you don't want to sell yours. It would be interesting to see if the ROMS would work on one of the many Mac Emulators, or could be made to work. Regards, Al Hartman (Macintosh Emulation List Host) http://www.topica.com/lists/MacEmuList Enlightenment means taking full responsibility for your life. - William Blake

23 years, 2 months

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How about this price not being accepted for a Magazine

by jrkeys＠concentric.net

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=2155564921

23 years, 2 months

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Chip ID on Fujitsu MB15140 needed

by Innfogra＠aol.com

I seem to have a couple hundred MB15140s in their original Fujitsu IC boxes. Does anyone have an idea what they are? Picture at http://members.aol.com/innfosale/MB15140A.JPG Is there a Fujitsu chip list on the Internet available? Google did not bring anything up for me. The date codes are 8809 so they are on topic. I got them from Fujitsu nearly 10 years ago and uncovered them recently. I would not be surprised if they were for the Fujitsu 8" or 14" hard drives since I bought a lot of new parts when they dismantled their 8" line in Hillsboro, OR. Any help appreciated. Paxton Astoria, OR

23 years, 2 months

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Electrolytic cap "protection"

by dwightk.elvey＠amd.com

>From: "Bryan Pope" <bpope(a)wordstock.com> > >Hey all, > > Awhile ago there was a thread about electrolytic capacitors popping and >then destroying the motherboard they are on. One of the ideas was to >replace them before they go. > > Now I was wondering about another idea... Would it be okay to encase >the capacitor in silicone gel? Then when the capacitor pops, it wouldn't >spread its electrolyte all over the motherboard. > > But would this cause other problems with heat or something? Would it >further shorten the life of the capacitor? > >Cheers, > >Bryan > Hi There isn't much you could cover it with that would stop a cap >from blowing. The pressures can get to several thousand PSI if there isn't a relief someplace. Wrapping several layers of paper towel around them might be better. This would at least keep the mess from the PCB. There was an article about some bad capacitors made in the last few years. According to the story, someone stole a formula for the electrolyte and the formula was missing some key ingredient ( most likely a depolarizer ). The caps made this way would out gas and rupture. Dwight

23 years, 2 months

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Xerox 8/16 available in Baltimore, MD area

by vcf＠siconic.com

See below. Contact original sender. Reply-to: <bernhardbang(a)netscape.net> ---------- Forwarded message ---------- Date: Fri, 07 Feb 2003 19:43:03 -0500 From: bernhardbang(a)netscape.net Subject: Zerox 16/8 Gentlemen, I have a Zerox 16/8 computer, complete with instruction manuals. Barely used. Includes Monitor and keyboard. Is it of any value? Do you want it? Who might want it? Thank you for your reply! Bernhard Bang 4208 Wickford Road Baltimore, MD 21210 -- Sellam Ismail Vintage Computer Festival ------------------------------------------------------------------------------ International Man of Intrigue and Danger http://www.vintage.org * Old computing resources for business and academia at www.VintageTech.com *

23 years, 2 months

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Seeking info on two PROM chips.

by pete＠dunnington.u-net.com

On Feb 10, 8:03, Paul Thompson wrote: > On Mon, 10 Feb 2003 pete(a)dunnington.u-net.com wrote: > > > E8 means they're 128KB, or 1 Megabit. The part numbers you quote are > > listed in Compaq Assisted Services online catalogue at $4 apiece, so > > you might still be able to get them from DEC/HP. > > I am not sure I have the URL for this, unless it is something I know by > another name.... Try a web search for "Compaq Assisted Services" or for the 23- part numbers you quoted? :-) Or http://www-legacy.digital.com/CAS-Catalog/pric.html -- Pete Peter Turnbull Network Manager University of York

23 years, 2 months

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Electrolytic cap "protection"

by pete＠dunnington.u-net.com

On Feb 10, 10:58, Bryan Pope wrote: > Awhile ago there was a thread about electrolytic capacitors popping and > then destroying the motherboard they are on. One of the ideas was to > replace them before they go. > > Now I was wondering about another idea... Would it be okay to encase > the capacitor in silicone gel? Then when the capacitor pops, it wouldn't > spread its electrolyte all over the motherboard. > > But would this cause other problems with heat or something? Would it > further shorten the life of the capacitor? Well, it's not going to improve its life, and it does mean that when it goes, it will make a louder bang, since it will be harder for the electrolyte to get out. Silicone isn't terribly strong, so it won't stop it. If you look at most electrolytic caps, you'll see they're designed to come apart under stress without turning into small grenades; the ends are scored, or the seals are deliberately made less strong than the aluminium case. -- Pete Peter Turnbull Network Manager University of York

23 years, 2 months

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Assembly on a Apple IIc+

by pete＠dunnington.u-net.com

On Feb 8, 11:06, Jim Keohane wrote: > The reference to "one cycle" instruction may have been referring > to there being 2 cpu cycles per clock cycle. Also, there's the "pipelining" > some say the 6502 does when the last (or only) byte of an instruction is > acted upon simultaneous to next instruction's 1st byte (opcode) being > fetched > > So perhaps "one instruction per clock cycle" may be awfully close with > pipelining and with use of zero page. You must be thinking of some different 6502 to the rest of us :-) As Sellam said, no 6502 opcode takes less than two clock cycles to execute, and most take more (up to 7): the only 2-cycle instructions are the ones with implied addressing, like RTS, CLI, TAX, ... This is why a 6502 running typical well-written code, running on a 2MHz clock, manages at best around 0.7 MIPS. There's no pipelining at all in a 6502. No overlap of instructions whatsoever. Zero-page instructions like LDA $12 take three clock cycles. There aren't two CPU cycles per clock cycle. Perhaps you're thinking of the fact that the 6502 uses a two-phase clock, and does part of the CPU cycle during phi-1, and part during phi-2? > Of course, we're talking Apple ]['s which, if I can trust my memory, > steal every other clock cycle to refresh memory. I believe you're thinking of how it uses part of the clock cycle when the CPU isn't accessing memory, not alternate clock cycles. > > > p.s. I also did quite well with 6502 asm code in cpu speed tests vs > > > 80x86 and Z80 programmers. The zero page, for all intents and purposes, > > > is 256 registers. That was the designers' intention, but you have to remember that it takes an extra clock cycle to access a zero-page location rather than a register. -- Pete Peter Turnbull Network Manager University of York

23 years, 2 months

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Who here has a Planar ELT-320?

by glenslick＠hotmail.com

Had I known that I might have bid on the first one that came up on eBay recently. I thought it might be just a fancy paperweight without the proper keyboard. I'll watch for a reasonable deal on one of those to show up again sometime. >From: Eric Dittman <dittman(a)dittman.net> > >The ELT320 can use either an AT-type keyboard or an LK201-type >keyboard (I have an LK401 connected to mine). _________________________________________________________________ Help STOP SPAM with the new MSN 8 and get 2 months FREE* http://join.msn.com/?page=features/junkmail

23 years, 2 months

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PACEMIPPS?

by ken＠seefried.com

From: Joe <rigdonj(a)cfl.rr.com> >Can anyone tell me exactly what a PACEMIPS PIMM - 33SG144C is? It's >made byPerformance Semiconductor but it's not listed on their (POOR!) >website. I THINK it might be an R33000 embedded processor but I'm not >sure. Performance Semi, AFAIK, generally does semiconductors for military/aerospace applications. I recall dimly that they made some MIL-SPEC MIPS devices; this would perhaps be one of them. The part number you cite is not familiar, but might be one of the line of R3000+R3010 derivatives. Not as esoteric as their relatively popular MIL-STD-1750A processors, but unusual none-the-less. I've actually got some Performance Semi 1750A chipsets...I must think of something to do with them... Ken

23 years, 2 months

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Electrolytic cap "protection"

by bpope＠wordstock.com

Hey all, Awhile ago there was a thread about electrolytic capacitors popping and then destroying the motherboard they are on. One of the ideas was to replace them before they go. Now I was wondering about another idea... Would it be okay to encase the capacitor in silicone gel? Then when the capacitor pops, it wouldn't spread its electrolyte all over the motherboard. But would this cause other problems with heat or something? Would it further shorten the life of the capacitor? Cheers, Bryan

23 years, 2 months

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How about this price not being accepted for a Magazine

by cb＠mythtech.net

>> Heck, things like the first appearance of Superman get about $15,000, and >> I would consider that WAY more collectible than the first issue of >> MacWorld even WITH signatures. > >Ummmm.... I believe the going rate for the first appearance of Superman in >Action Comics #1 is over $100,000.... I can't say I am surprised. Its been a LONG time since I looked into comic values (I have a box of a few #1's around, but I don't think of anything worth much). Either way... MacWorld ain't the first appearance of Superman, heck, it ain't even the first appearance of the Mac! -chris <http://www.mythtech.net>

23 years, 2 months

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How about this price not being accepted for a Magazine

by cb＠mythtech.net

>The people bidding on this magazine have no idea what they're doing. I >have at least 2-3 copies of this issue (san autographs, but still). Yeah, I can't imagine it being too rare. There is a store where I vacation (jersey shore), that sells old magazines and the likes. With a few odd execptions, nothing ever seems to go for more than about $50 max. (Exceptions include things like an unaltered copy of the Traci Lords issue of Penthouse, I think they wanted $125 for that... although I would think selling it would actually be illegal since she was under 18 for the shoot). Heck, things like the first appearance of Superman get about $15,000, and I would consider that WAY more collectible than the first issue of MacWorld even WITH signatures. -chris <http://www.mythtech.net>

23 years, 2 months

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How about this price not being accepted for a Magazine

by mbg＠TheWorld.com

>>I think anybody that would pay that kind of money without a LOT more >>proof of authenticity is an idiot! A rich idiot perhaps but an idiot >>none the less. >I noticed that the seller has zero feedback so they must be new to E-bay >(or they've changed their identity). Sounds like a grand formula for a >rip-off to me! Unfortunately, a positive feedback (say, in the hundreds) also does not guarantee that you won't get ripped-off. I recently (well, November of last year), purchased something through ebay from someone who had about 140+ for their feedback... and very few negatives. I sent them the payment for the item ($300+) and although they kept sending emails about how they were going to get it out to me, with some extras due to the delay, the person never did ship the item. His contact information was totally bogus (the mail-to address was different from what the person had on file with ebay, which I didn't get until it was too late and I was reporting a problem). The phone number was no good (again, I didn't have that until there was a problem). Now, the person's account is inactive... So, don't assume anything from a feedback profile value... Megan Gentry Former RT-11 Developer +--------------------------------+-------------------------------------+ | Megan Gentry, EMT/B, PP-ASEL | email: mbg at world.std.com | | | | | "this space | (s/ at /@/) | | unavoidably left blank" | URL: http://world.std.com/~mbg/ | | | "pdp-11 programmer - some assembler | | (DEC '77-'98) | required." - mbg KB1FCA | +--------------------------------+-------------------------------------+

23 years, 2 months

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Free 19" Monitor - HP A4033A - UK

by dave＠naffnet.org.uk

I have a 19" HP monitor that is free to anyone who can collect, or arrange collection, from east Berkshire. This is a 3/5 BNC connected beastie (sync-on-green or separate sync) and is the perfect companion to a 700 series workstation. There is some screen-burn , but the monitor is perfectly usable. This monitor is taking up too much space, so it's time to overcome the hoarding instinct and pass it on. Cheers, Dave.

23 years, 2 months

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Seeking info on two PROM chips.

by pete＠dunnington.u-net.com

On Feb 9, 19:24, Brian Chase wrote: > Does anyone have details on the following ROM or PROM chips from a > DEC VAXstation 4000 VLC? Their identifying numbers are LUP9327580 > (DEC part# 23-286E8-00) and LUP9331604 (DEC part# 23-287E8-00); > they're each 40-pin DIPs. The U's may actually be O's or 0's; it's > difficult to tell given the DEC part number label placement. 23-xxxEx is a ROM/EPROM part number, so they may well be programmable. E8 means they're 128KB, or 1 Megabit. The part numbers you quote are listed in Compaq Assisted Services online catalogue at $4 apiece, so you might still be able to get them from DEC/HP. Is there any type number under the DEC label? Are they brown ceramic with a quartz window in the top? If so, they're probably EPROMs, most likely 27C1024 (64K x 16 bit). If not, they're probably one-time PROMs, or possibly Flash. If they're EPROMs, it's unlikely you overwrote them, unless you had them in a programmer. -- Pete Peter Turnbull Network Manager University of York

23 years, 2 months

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Odd ideas that I've had lately...

by Robert_Feldman＠jdedwards.com

Just get an HP 200LX palmtop. It's basically a PC-XT (MS-DOS 5.0, custom 80186 processor) with a monochrome CGA screen (640x200). It can run most standard MS-DOS programs, has built-in terminal emulation, serial and IR ports, a PCMCIA socket that can handle standard of Compact Flash RAM (cards bigger than 256MB might require a driver, depending on brand). You can get upgraded models with up to 96MB internal RAM and a 2x crystal (~32MHz). Runs on 2 AA batteries for days, and can use rechargable batteries (with internal charging). Has instant-on and sleep. There is ethernet and TCP/IP software for it, as well as web and email software. Lastly, you can hook it up to a cell phone to get your email. Only problem is, it's not quite 10 years old :). -----Original Message----- From: John Boffemmyer IV [mailto:john_boffemmyer_iv@boff-net.dhs.org] Sent: Saturday, February 08, 2003 7:44 PM To: cctech(a)classiccmp.org Subject: Re: Odd ideas that I've had lately... <snip> Say, I go over to Sridhar's house and decide I want to grab the docs on an old DECServer, most palms don't have the storage space or interface unless you go find a program written for the machine you are on and have an IR port or happen to have a Palm cradle for that model (nowadays one cradle does NOT fit all). A mini-PC portable, like the idea I had, would have standard built-in interfaces that would allow for this, plus the needed storage space. Like simple FTP'ing the data over a standard tcp/ip protocol on the built-in Ethernet or such, this would make portable data sharing easier. <snip>

23 years, 2 months

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UNSUBSCRIBE CLASSICCMP dweebgeek@yahoo.com

by dweebgeek＠yahoo.com

__________________________________________________ X-Apparently-To: dweebgeek(a)yahoo.com via 66.218.93.72; 02 Feb 2003 15:05:09 -0800 (PST) X-Track: 2: 100 Return-Path: <cctalk-admin(a)classiccmp.org> Received: from 209.145.140.36 (EHLO huey.classiccmp.org) (209.145.140.36) by mta584.mail.yahoo.com with SMTP; 02 Feb 2003 15:05:08 -0800 (PST) Received: from huey.classiccmp.org (localhost [127.0.0.1]) by huey.classiccmp.org (8.11.6/8.11.6) with ESMTP id h12N53m31131; Sun, 2 Feb 2003 17:05:03 -0600 (CST) (envelope-from cctalk-admin(a)classiccmp.org) Received: (from mailnull@localhost) by huey.classiccmp.org (8.11.6/8.11.6) id h12N47931111 for cctalk-post; Sun, 2 Feb 2003 17:04:07 -0600 (CST) (envelope-from cctalk-admin) X-Authentication-Warning: huey.classiccmp.org: mailnull set sender to cctalk-admin using -f Received: from smtp13.eresmas.com ([62.81.235.113]) by huey.classiccmp.org (8.11.6/8.11.6) with ESMTP id h12N46m31107 for <cctech(a)classiccmp.org>; Sun, 2 Feb 2003 17:04:06 -0600 (CST) (envelope-from vsimon(a)eresmas.com) Received: from [192.168.108.108] (helo=smtp08.in.mad.eresmas.com) by smtp13.eresmas.com with esmtp (Exim 4.10) id 18fT7k-0005Lq-00 for cctech(a)classiccmp.org; Mon, 03 Feb 2003 00:02:04 +0100 Received: from [80.224.147.249] (helo=VNOMIS.eresmas.com) by smtp08.in.mad.eresmas.com with esmtp (Exim 4.10) id 18fT7j-0008TF-00 for cctech(a)classiccmp.org; Mon, 03 Feb 2003 00:02:04 +0100 X-Sender: vsimon(a)pop.eresmas.com X-Mailer: QUALCOMM Windows Eudora Version 5.2.0.9 To: cctech(a)classiccmp.org From: Vicente =?iso-8859-1?Q?Sim=F3n?= <vsimon(a)eresmas.com> Subject: UNSUBSCRIBE CLASSICCMP vsimon(a)eresmas.com In-Reply-To: <019301c2cb0f$27299620$0101c80a@p2350> References: <Pine.NEB.4.44.0302020842130.27815-100000(a)haiku.jarai.net> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; format=flowed X-Antivirus: avast! (VPS 31/01/2003), Outbound message X-Antivirus-Status: Clean X-SA-Do-Not-Run: Yes X-SA-Exim-Scanned: No; SAEximRunCond expanded to false Sender: cctalk-admin(a)classiccmp.org Errors-To: cctalk-admin(a)classiccmp.org X-BeenThere: cctalk(a)classiccmp.org X-Mailman-Version: 2.0.10 Precedence: bulk Reply-To: cctalk(a)classiccmp.org List-Unsubscribe: <http://www.classiccmp.org/mailman/listinfo/cctalk>, <mailto:cctalk-request@classiccmp.org?subject=unsubscribe> List-Id: General Discussion: On-Topic and Off-Topic Posts <cctalk.classiccmp.org> List-Post: <mailto:cctalk@classiccmp.org> List-Help: <mailto:cctalk-request@classiccmp.org?subject=help> List-Subscribe: <http://www.classiccmp.org/mailman/listinfo/cctalk>, <mailto:cctalk-request@classiccmp.org?subject=subscribe> List-Archive: <http://www.classiccmp.org/pipermail/cctalk/> X-Original-Date: Mon, 03 Feb 2003 00:02:33 +0100 Date: Mon, 03 Feb 2003 00:02:33 +0100 Content-Length: 41

23 years, 2 months

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PS2 Mouse

by julesrichardsonuk＠yahoo.co.uk

Tony, > While this is true on the genuine PS/2 machines (and the mouse protocol > is very similar to a PC/AT or PS/2 keyboard protocol), there's no reason > why it _has_ to be. It would be possible to make an ISA card with a > programmed microcontroller on it (maybe an 8042, like the keyboard > controller) with the host port at some otherwise unused I/O address, and > then use a special driver (similar in concept to the serial and bus mouse > drivers) to access it. well, I suppose if you're going to go the microcontroller route you may as well make it an external unit with the serial controller included... no messing around with custom drivers on the host system then. Bit beyond me though I'm afraid, but as the original poster said I'm surprised nobody's done it, especially a hobbyist... I suppose it'd need its own power supply though which is a shame. cheers Jules Everything you'll ever need on one web page >from News and Sport to Email and Music Charts http://uk.my.yahoo.com

23 years, 2 months

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cctech digest, Vol 1 #360 - 29 msgs

by paul.shubel＠verizon.net

> I'm either being imprecise or various readings I have done were >imprecise. The reference to "one cycle" instruction may have been referring >to there being 2 cpu cycles per clock cycle. Also, there's the "pipelining" >some say the 6502 does when the last (or only) byte of an instruction is >acted upon simultaneous to next instruction's 1st byte (opcode) being >fetched Hi Everyone, I have recently researched this but it is not true. The so called "pipelining" was just that internally when the CPU does an ADD instructions it does some sub-operations currently. This was hyped in some texts by using (wrongly) the word "pipelining". Normally, "pipelining" for micros refers to overlaping the fetch of one instruction with the "execute phase" of the previous instruction. The 6502 does none of this. Note, the Z8 actually does some limited pipelining. This put it ahead in bragging rights amongs the 8-bitters. Cheers, Paul ----- Original Message ----- From: <cctech-request(a)classiccmp.org> To: <cctech(a)classiccmp.org> Sent: Saturday, February 08, 2003 1:00 PM Subject: cctech digest, Vol 1 #360 - 29 msgs > Send cctech mailing list submissions to > cctech(a)classiccmp.org > > To subscribe or unsubscribe via the World Wide Web, visit > http://www.classiccmp.org/mailman/listinfo/cctech > or, via email, send a message with subject or body 'help' to > cctech-request(a)classiccmp.org > > You can reach the person managing the list at > cctech-admin(a)classiccmp.org > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of cctech digest..." > > > Today's Topics: > > 1. Re: Assembly on a Apple IIc+ (Sellam Ismail) > 2. Re: Unassembled Superboard II (Sellam Ismail) > 3. Re: Assembly on a Apple IIc+ (Sellam Ismail) > 4. Kaypro II available. (Alan Emmerson) > 5. Re: WANTED: RA7x Enclosure/Operator Ctrl. Panel (Eric Dittman) > 6. Re: interesting find (Tony Duell) > 7. Re: MicroVAX 3800 Power Cable (Tony Duell) > 8. Re: Rookie HP-85 problem (Tony Duell) > 9. Re: Old Computer Companies (John Honniball) > 10. Re: Assembly on a Apple IIc+ (Mike Ford) > 11. RE: WANTED: RA7x Enclosure/Operator Ctrl. Panel (John Willis) > 12. Re: MicroVAX 3800 Power Cable (pete(a)dunnington.u-net.com) > 13. RE: Looking for source of MFM or RLL drives (Kelly Leavitt) > 14. RE: Disk drive head locking (DEC RA-82 and HP 7920) (John Willis) > 15. RE: Looking for source of MFM or RLL drives (John Willis) > 16. Re: Rookie HP-85 problem (Joe) > 17. Re: Old computers from HP, maybe? Anybody know where HP is > collecting/storing them? (Fred Cisin (XenoSoft)) > 18. Re: Old computers from HP, maybe? Anybody know where HP is > collecting/storing them? (John Allain) > 19. Re: Looking for source of MFM or RLL drives (Jerome H. Fine) > 20. Re: Old computers from HP, maybe? Anybody know where HP is > collecting/storing them? (R. D. Davis) > 21. RE: Atari ST Help (Lawrence Walker) > 22. TTY ASR-33 Platen? (George R. Gonzalez) > 23. Re: Assembly on a Apple IIc+ (Jim Keohane) > 24. Re: Assembly on a Apple IIc+ (Jim Keohane) > 25. Re: Grundy Newbrain fix (lgomez) > 26. OT Need parts (James Rice) > > --__--__-- > > Message: 1 > Date: Fri, 7 Feb 2003 15:27:17 -0800 (PST) > From: Sellam Ismail <foo(a)siconic.com> > To: <cctalk(a)classiccmp.org> > Subject: Re: Assembly on a Apple IIc+ > Reply-To: cctech(a)classiccmp.org > > On Fri, 7 Feb 2003, Hans Franke wrote: > > > I used BigMac for all my projects, including the doomed SSC > > ROM... (*1) > > > > > > Gruss > > H. > > (*1) I don't know if I already told the story > > I told you I would optimize your code for you :) > > Sellam Ismail Vintage Computer Festival > -------------------------------------------------------------------------- ---- > International Man of Intrigue and Danger http://www.vintage.org > > * Old computing resources for business and academia at www.VintageTech.com * > > --__--__-- > > Message: 2 > Date: Fri, 7 Feb 2003 15:34:32 -0800 (PST) > From: Sellam Ismail <foo(a)siconic.com> > To: <cctalk(a)classiccmp.org> > Subject: Re: Unassembled Superboard II > Reply-To: cctech(a)classiccmp.org > > On Fri, 7 Feb 2003, Bill Sudbrink wrote: > > > Vintage Computer Festival wrote: > > > Someone sent me an unassembled Ohio Scientific Superboard II kit in its > > > original box the other day. > > > > Oh! You lucky son-of-a-gun! What REV? > > The solder mask on the board says "Ohio Scientific Model 600 CPU" and "REV > D". > > The manual is copyright 1982 and the original invoice is dated August 4, > 1982. > > Sellam Ismail Vintage Computer Festival > -------------------------------------------------------------------------- ---- > International Man of Intrigue and Danger http://www.vintage.org > > * Old computing resources for business and academia at www.VintageTech.com * > > --__--__-- > > Message: 3 > Date: Fri, 7 Feb 2003 15:40:34 -0800 (PST) > From: Sellam Ismail <foo(a)siconic.com> > To: <cctalk(a)classiccmp.org> > Subject: Re: Assembly on a Apple IIc+ > Reply-To: cctech(a)classiccmp.org > > On Fri, 7 Feb 2003, Jim Keohane wrote: > > > p.s. I also did quite well with 6502 asm code in cpu speed tests vs > > 80x86 and Z80 programmers. The zero page, for all intents and purposes, > > is 256 registers. 6502 is single cycle instruction execution. Look up > > definitions of RISC and the 6502 is arguably RISC-like. > > No 6502 instruction takes less than 2 cycles to complete. > > Sellam Ismail Vintage Computer Festival > -------------------------------------------------------------------------- ---- > International Man of Intrigue and Danger http://www.vintage.org > > * Old computing resources for business and academia at www.VintageTech.com * > > --__--__-- > > Message: 4 > From: "Alan Emmerson" <aje(a)technet2000.com.au> > To: <classiccmp(a)classiccmp.org> > Subject: Kaypro II available. > Date: Sat, 8 Feb 2003 09:44:55 +1000 > Reply-To: cctech(a)classiccmp.org > > I have two Kaypro II that I have owned from new. Both are upgraded to run > at higher clock speeds and one has a cooling fan fitted. One has the PC8 > ROM There is a complete set of the bundled distribution software (Select, > Perfect Writer etc) with manuals, including that really first class ground > breaking program SBasic, and other programs that I wrote in SBasic > including multi variable non linear regression analysis. Also Unidos and > etc which allows the floppy drives to emulate those of other machines. > > > I used one of these machines to run the first simulation of the CSIRO > Sydney to Melbourne high speed railway. > > What price might one expect for such a a machine?. > > Alan Emmerson > Brisbane QLD > Australia > > --__--__-- > > Message: 5 > From: Eric Dittman <dittman(a)dittman.net> > Subject: Re: WANTED: RA7x Enclosure/Operator Ctrl. Panel > To: cctalk(a)classiccmp.org > Date: Fri, 7 Feb 2003 17:46:03 -0600 (CST) > Reply-To: cctech(a)classiccmp.org > > > Wanted: RA7x Enclosure/Operator Ctrl. Panel > > Where are you located? > -- > Eric Dittman > dittman(a)dittman.net > Check out the DEC Enthusiasts Club at http://www.dittman.net/ > > --__--__-- > > Message: 6 > From: ard(a)p850ug1.demon.co.uk (Tony Duell) > Subject: Re: interesting find > To: cctalk(a)classiccmp.org > Date: Fri, 7 Feb 2003 20:42:32 +0000 (GMT) > Reply-To: cctech(a)classiccmp.org > > > And when nobody cared about the size, weight and power consumption > > of computers... ;-) > > > > > The HP 9100A/B calculators use a similar architecture, using > > > wire bobbins instead of rods, for a microsequence store. > > The HP9100B was entirely discrete transistors [1], with normal R/W core > memory, the core-on-a-rope microcde store and inductively coupled PCB > tracks for the main program ROM. > > The HP9810 which replaced it was built from TTL chips, with 256 nybble > PROMs for the microocde store (and the ALU, which was a couple of > programmed PROMs), 512 byte ROMs for the main program store, and 256 bit > DRAMs (1103s) for the R/W memory. > > Admittedly the 9810 had space for an internal thermal printer, and it had > more user memory. But in the basic configuration it did less ('Math' > functions, like SIN, COS, TAN were on a plug-in ROM module on the 9810, > and bulit-in on the 9100). But the 9810 (the machine built with ICs) is > larger than the 9100. > > [1] OK, there are 8 IC op-amps in the 9100B on the card reader PCB (read > amplifier and comparator for the 3 data tracks and the clock track). But > the machine will run without the card reader ;-) > > -tony > > --__--__-- > > Message: 7 > From: ard(a)p850ug1.demon.co.uk (Tony Duell) > Subject: Re: MicroVAX 3800 Power Cable > To: cctalk(a)classiccmp.org > Date: Fri, 7 Feb 2003 23:21:19 +0000 (GMT) > Reply-To: cctech(a)classiccmp.org > > > On Feb 6, 22:33, Tony Duell wrote: > > > > > I don't see how you can do a proper test without a visual inspection > > of > > > the connections... And I've yet to see a moulded connector that > > provides > > > a proper strain-relief for the cable. > > > > A good PAT tester will check at a sensible current (though admittedly a > > lot only check earth continuity at a proper current). As for strain > > I've never met a PAT tester that tests the current-carrying conductors at > a significant current, mainly because there's no easy way to do this > without dismantling the unit under test (if the cable is fixed) -- the > maximum current you could pass would be the normal operating current of > the unit (by simply applying mains to it), which is not enough. Even then > you couldn't measure the voltage drop across one of the conductors. > > You may have guessed that I don't trust PAT testers, and I have no faith > at all in the safety standards as usually applied. Proper safety tests on > the other hand... > > > releif, well you're not supposed to swing the equipment by the power > > cable, Tony! > > True, but equally I don't expect the outer covering of the cable to pull > out of the moulded connector in normal use exposing the single-insulated > wires inside. Which has happened to many moulded cables round here. > > I assume you'd fail a rewirable plug with the cord grip missing/not used > on an electrical safety test. I certainly would. But most moulded cables > are not a lot better than that. > > > > The cable mounted section looks like a normal 'cold condition' > > _socket_, > > > but there are 3 round pins sticking out of the face of it (where the > > > socket holes would be). The chassis part looks like the normal plug > > > (recessed into the panel, etc) with 3 holes in it in place of the > > normal > > > plug pins. > > > > I've a feeling I've seen this used somewhere -- but not recently, and I > > can't think where :-( > > I've thought of another place I've seen them used. Leitz Focomat 1 > enlarger, at the top of the column. Connector for the lampholder assembly. > > -tony > > --__--__-- > > Message: 8 > From: ard(a)p850ug1.demon.co.uk (Tony Duell) > Subject: Re: Rookie HP-85 problem > To: cctalk(a)classiccmp.org > Date: Fri, 7 Feb 2003 23:41:27 +0000 (GMT) > Reply-To: cctech(a)classiccmp.org > > > OK, I took it apart to take alook inside and clean it up. Now I can't get > > the damn cover back on. > > It seems to get caught on the tape eject button. Don't want to break the > > cover forcing it. > > > > Are you supposed to separate the monitor/tape brown faceplate from the rest > > of the cover first? > > No, pull off the eject button (you should do this before removing the > cover). Then the cover fits easily. Put the button back on when the cover > is screwed in place. > > -tony > > --__--__-- > > Message: 9 > Date: Sat, 08 Feb 2003 00:08:16 +0000 > From: John Honniball <coredump(a)gifford.co.uk> > Organization: Stoke Gifford Computer Museum > To: cctalk(a)classiccmp.org > Subject: Re: Old Computer Companies > Reply-To: cctech(a)classiccmp.org > > Hans B Pufal wrote: > >> Eliott computers from UK. What happened to them? I mean Eliott, not N...a > > There are a few Elliot 803s preserved in Britain. One at Bletchley > Park, another at the Science Museum, and probably others. They have > an interesting power supply: the incoming mains is used to charge > a *big* Ni-Cd battery, which powers the computer. The same battery > is used in the Nimrod aircraft, and the RAF have kindly supplied > spares for the 803s. > > -- > John Honniball > coredump(a)gifford.co.uk > > --__--__-- > > Message: 10 > Date: Fri, 07 Feb 2003 16:03:12 -0800 > To: cctalk(a)classiccmp.org > From: Mike Ford <mikeford(a)socal.rr.com> > Subject: Re: Assembly on a Apple IIc+ > Reply-To: cctech(a)classiccmp.org > > > > Get a copy of BigMac, and go ahead. it's a nice all in one > > > environment, and works fine on every Apple. > > > >Oh Yeah! BigMac (or as we used to call it at Software Productions, > >"BigHack"). > > > My favorite was always LISA, Laser Interactive Symbolic Assembler, a > complete editor/asm/runtime kind of setup. > > I need to look around and figure what the status is of the program, but I > have most of the versions of it that ever existed. > > --__--__-- > > Message: 11 > Subject: RE: WANTED: RA7x Enclosure/Operator Ctrl. Panel > Date: Fri, 7 Feb 2003 18:02:00 -0700 > From: "John Willis" <jwillis(a)arielusa.com> > To: <cctalk(a)classiccmp.org> > Reply-To: cctech(a)classiccmp.org > > New Mexico, USA > > > -----Original Message----- > From: Eric Dittman > Sent: Fri 2/7/2003 4:46 PM > To: cctalk(a)classiccmp.org > Cc: > Subject: Re: WANTED: RA7x Enclosure/Operator Ctrl. Panel > > > Wanted: RA7x Enclosure/Operator Ctrl. Panel > > Where are you located? > -- > Eric Dittman > dittman(a)dittman.net > Check out the DEC Enthusiasts Club at http://www.dittman.net/ > > [demime 1.01a removed an attachment of type application/ms-tnef which had a name of winmail.dat] > > --__--__-- > > Message: 12 > Date: Sat, 8 Feb 2003 01:24:44 GMT > From: pete(a)dunnington.u-net.com > To: cctalk(a)classiccmp.org > Subject: Re: MicroVAX 3800 Power Cable > Reply-To: cctech(a)classiccmp.org > > On Feb 7, 23:21, Tony Duell wrote: > > > On Feb 6, 22:33, Tony Duell wrote: > > > > > > > I don't see how you can do a proper test without a visual > inspection > > > of > > > > the connections... And I've yet to see a moulded connector that > > > provides > > > > a proper strain-relief for the cable. > > > > > > A good PAT tester will check at a sensible current (though > admittedly a > > > lot only check earth continuity at a proper current). As for > strain > > > > I've never met a PAT tester that tests the current-carrying > conductors at > > a significant current, mainly because there's no easy way to do this > > without dismantling the unit under test (if the cable is fixed) -- > the > > maximum current you could pass would be the normal operating current > of > > the unit (by simply applying mains to it), which is not enough. Even > then > > you couldn't measure the voltage drop across one of the conductors. > > A proper PAT tester to current standards has a socket for each end of > an IEC cable, and each cable is supposed to be individually tested with > both ends plugged in to the tester. > > > > releif, well you're not supposed to swing the equipment by the > power > > > cable, Tony! > > > > True, but equally I don't expect the outer covering of the cable to > pull > > out of the moulded connector in normal use exposing the > single-insulated > > wires inside. Which has happened to many moulded cables round here. > > I've only seen one do that -- and it was an instant candidate for the > wirecutters at both ends. A proper visual inspection is supposed to be > the first part of the PAT. > > > I assume you'd fail a rewirable plug with the cord grip missing/not > used > > on an electrical safety test. I certainly would. > > Yes. The first thing I do with any multiblock is take it apart to see > how the ends are wired -- the cheap ones are usually in a condition > where I feel compelled to re-do the job. > > -- > Pete Peter Turnbull > Network Manager > University of York > > --__--__-- > > Message: 13 > From: Kelly Leavitt <CCTalk(a)catcorner.org> > To: "'cctalk(a)classiccmp.org '" <cctalk(a)classiccmp.org> > Subject: RE: Looking for source of MFM or RLL drives > Date: Fri, 7 Feb 2003 20:12:08 -0500 > Reply-To: cctech(a)classiccmp.org > > Yes, the OS allows entering of drive geometry. Actually only supports MFM up > to 70Meg. RLL drives will of course work, just not to RLL capacity. I'm > looking for the largest drives I can find. > > From: Ethan Dicks > --- Kelly Leavitt <CCTalk(a)catcorner.org> wrote: > > Any good sources of MFM or RLL drives. This would be for a Tandy 6000 > > running Xenix. > > > > I'm looking for 70 Meg or higher MFM (110 RLL capacity). > > Hmm... those aren't so common (in the DEC world, there are two > choices - the RD53 (Miniscribe 1325) and the RD54 (Maxtor XT2190). > > I take it you aren't constrained by a narrow set of expected > geometries? (i.e. - you have a running system and/or the install > procedure asks you about the drive rather than assuming?) > > -ethan > > --__--__-- > > Message: 14 > Subject: RE: Disk drive head locking (DEC RA-82 and HP 7920) > Date: Fri, 7 Feb 2003 18:37:25 -0700 > From: "John Willis" <jwillis(a)arielusa.com> > To: <cctalk(a)classiccmp.org> > Reply-To: cctech(a)classiccmp.org > > I seem to have only up to RA81, but everything else :( > -----Original Message----- > From: Dan Veeneman > Sent: Fri 2/7/2003 3:04 PM > To: cctech(a)classiccmp.org > Cc: > Subject: Disk drive head locking (DEC RA-82 and HP 7920) > > Hello, > > I'm scheduled to pick up a pair of DEC RA-82 drives along > with an HP 7920 drive in the next couple of weeks. > > I don't have any technical documentation for either of these > drives, but I'd be very interested in learning the proper > procedure for locking down the heads on these drives > prior to moving them. If anyone has the steps to take > for either or both of these drives, please drop me a note > or point me to the proper archive. > > They've already been warehoused, so it might be too late, > but I'd like to be as safe as I can. > > Thanks! > > > Cheers, > > Dan > www.decodesystems.com/wanted.html > > [demime 1.01a removed an attachment of type application/ms-tnef which had a name of winmail.dat] > > --__--__-- > > Message: 15 > Subject: RE: Looking for source of MFM or RLL drives > Date: Fri, 7 Feb 2003 18:43:20 -0700 > From: "John Willis" <jwillis(a)arielusa.com> > To: <cctalk(a)classiccmp.org> > Reply-To: cctech(a)classiccmp.org > > I have an RD54 available... no idea whether its working. > -----Original Message----- > From: Kelly Leavitt > Sent: Fri 2/7/2003 6:12 PM > To: 'cctalk(a)classiccmp.org ' > Cc: > Subject: RE: Looking for source of MFM or RLL drives > > Yes, the OS allows entering of drive geometry. Actually only supports > MFM up > to 70Meg. RLL drives will of course work, just not to RLL capacity. I'm > looking for the largest drives I can find. > > From: Ethan Dicks > --- Kelly Leavitt <CCTalk(a)catcorner.org> wrote: > > Any good sources of MFM or RLL drives. This would be for a Tandy 6000 > > running Xenix. > > > > I'm looking for 70 Meg or higher MFM (110 RLL capacity). > > Hmm... those aren't so common (in the DEC world, there are two > choices - the RD53 (Miniscribe 1325) and the RD54 (Maxtor XT2190). > > I take it you aren't constrained by a narrow set of expected > geometries? (i.e. - you have a running system and/or the install > procedure asks you about the drive rather than assuming?) > > -ethan > > [demime 1.01a removed an attachment of type application/ms-tnef which had a name of winmail.dat] > > --__--__-- > > Message: 16 > Date: Fri, 07 Feb 2003 21:27:05 > To: cctalk(a)classiccmp.org > From: Joe <rigdonj(a)cfl.rr.com> > Subject: Re: Rookie HP-85 problem > Reply-To: cctech(a)classiccmp.org > > Pull on the tape eject button. It's mounted on a stud and will pull right off. Just push it back on to re-install it. > > Joe > > At 01:11 PM 2/7/03 -0500, you wrote: > >OK, I took it apart to take alook inside and clean it up. Now I can't get > >the damn cover back on. > >It seems to get caught on the tape eject button. Don't want to break the > >cover forcing it. > > > >Are you supposed to separate the monitor/tape brown faceplate from the rest > >of the cover first? > > > >HELP > > > >RH > > --__--__-- > > Message: 17 > Date: Fri, 7 Feb 2003 20:13:09 -0800 (PST) > From: "Fred Cisin (XenoSoft)" <cisin(a)xenosoft.com> > To: cctalk(a)classiccmp.org > Subject: Re: Old computers from HP, maybe? Anybody know where HP is > collecting/storing them? > Reply-To: cctech(a)classiccmp.org > > > Hewlett-Packard is hoping a little green will help make computer owners > > recycle more of their old tech gear. The computer maker is testing a > > no, they are hoping that a little green will help make computer owners get > rid of their "old" tech gear and buy more new stuff. > > > > meets the charities' minimum standards. "For the most part what we get in > > here is pretty darn old," St. Denis said. HP's recycling program accepts > > . . . some of it is as much as two years old!!!! > > > A while back, HP began to "recycle" toner cartridges for the purpose of > making fewer empties available for refilling (which competes with their > new cartridge sales). > > > What do YOU think their primary motivation is?? > > > "Re: Old computers from HP, maybe?" > ^^^^ > It is a ONE-WAY process, of old computers going TO HP to remove them from > circulation. > > > -- > Grumpy Ol' Fred cisin(a)xenosoft.com > > --__--__-- > > Message: 18 > From: "John Allain" <allain(a)panix.com> > To: <cctalk(a)classiccmp.org> > Subject: Re: Old computers from HP, maybe? Anybody know where HP is > collecting/storing them? > Date: Fri, 7 Feb 2003 23:28:25 -0500 > Reply-To: cctech(a)classiccmp.org > > > A while back, HP began to "recycle" toner cartridges for the > > purpose of making fewer empties available for refilling (which > > competes with their new cartridge sales). > > New cartridge sales?? I bought one of their "New" cartridges. > Here's what the small print says: > "This newly manufactured product may contain parts and > materials recovered from the HP Printing Supplies Return > and Recycling Program." > > > What do YOU think their primary motivation is?? > > Selling refills themselves, But just Calling them new. > > John A. > > --__--__-- > > Message: 19 > Date: Fri, 07 Feb 2003 23:59:51 -0500 > From: "Jerome H. Fine" <jhfinepw4z(a)compsys.to> > Organization: Just Sufficient > To: cctalk(a)classiccmp.org > Subject: Re: Looking for source of MFM or RLL drives > Reply-To: cctech(a)classiccmp.org > > >Kelly Leavitt wrote: > > > > I'm looking for 70 Meg or higher MFM (110 RLL capacity). > > Hmm... those aren't so common (in the DEC world, there are two > > choices - the RD53 (Miniscribe 1325) and the RD54 (Maxtor XT2190). > > Jerome Fine replies: > > By the way, the RD53 is a Micropolis 1325 or 1335 with the > R7 jumper added to the logic board. Otherwise, the DEC > RQDX2 will not recognize the drive. I have never tried them > on the RQDX3 without the R7 jumper, but it might be possible - > probably NOT. > > And while there may still be rare occasions when you can actually > complete the FORMAT required for an RD53, I would recommend > that they be used ONLY for scratch at this point at the end of their > life cycle. I suppose that there might still be the odd RD53 that is > still living a good life, but most (almost all) have become so unreliable > that I strongly recommend NOT using them for any files you care to > see the next time you turn the computer on. > > Sincerely yours, > > Jerome Fine > -- > If you attempted to send a reply and the original e-mail > address has been discontinued due a high volume of junk > e-mail, then the semi-permanent e-mail address can be > obtained by replacing the four characters preceding the > 'at' with the four digits of the current year. > > --__--__-- > > Message: 20 > Date: 8 Feb 2003 00:57:58 -0500 > Date: Sat, 8 Feb 2003 00:57:58 -0500 > From: "R. D. Davis" <rdd(a)rddavis.org> > To: cctalk(a)classiccmp.org > Subject: Re: Old computers from HP, maybe? Anybody know where HP is > collecting/storing them? > Organization: why? > Reply-To: cctech(a)classiccmp.org > > Quothe Fred Cisin (XenoSoft), from writings of Fri, Feb 07, 2003 at 08:13:09PM -0800: > > > Hewlett-Packard is hoping a little green will help make computer owners > > > recycle more of their old tech gear. The computer maker is testing a > > > > no, they are hoping that a little green will help make computer owners get > > rid of their "old" tech gear and buy more new stuff. > > Wasn't HP the company that was saving and preserving the "vintage" > computer equipment turned back in to them? I think I read something > about this on their web site, or somewhere, about a year or two ago. > That's not to say they weren't scrapping newer equipment, however, and > I don't recall reading how old the equipment had to be to qualify for > preservation. > > > What do YOU think their primary motivation is?? > > > > > > "Re: Old computers from HP, maybe?" > > ^^^^ > > It is a ONE-WAY process, of old computers going TO HP to remove them from > > circulation. > > Yep... even the vintage ones if they still save them from being > scrapped; surely they still get sent off to a warehouse somewhere to > keep them out of circulation. Speaking of circulation, an HP-3000 > Series III computer running MPE-IV was used to process data for the > circulation department of the Baltimore Sun back around 1990... it was > quite a contrast to see that, and it's disk farm, right across the > room from a sea of big blue cabinets for an IBM mainframe system. > > -- > Copyright (C) 2002 R. D. Davis The difference between humans & other animals: > All Rights Reserved an unnatural belief that we're above Nature & > rdd(a)rddavis.org 410-744-4900 her other creatures, using dogma to justify such > http://www.rddavis.org beliefs and to justify much human cruelty. > > --__--__-- > > Message: 21 > From: "Lawrence Walker" <lgwalker(a)mts.net> > To: "Jeffrey S. Worley" <Technoid(a)30below.com>, cctalk(a)classiccmp.org > Date: Fri, 7 Feb 2003 23:27:36 -0600 > Subject: RE: Atari ST Help > Reply-To: cctech(a)classiccmp.org > > Hmmm how did my address get into this ? > As the old flame went "check your attributes" > and in this case your deletions. > > Lawrence > > On 7 Feb 2003, , Jeffrey S. Worley wrote: > > > BTW, the Link II's they are selling are NEW. Call and ask or > > leave an email. I just checked their catalog. The link I > > bough was from them IIRC. It came in it's original packaging > > and was perfect in all respects. Still is perfect though now > > used... ;-) > > > > Regards, > > > > Jeff > > > > > Yes, I know about that site, but they want WAY too > > > much money for a used adapter for an old computer. > > > > > > You would think that at this point, they'd be... > > > > > > > > lgwalker@ mts.net > > > lgwalker@ mts.net > > --__--__-- > > Message: 22 > From: "George R. Gonzalez" <grg(a)umn.edu> > To: <classiccmp(a)classiccmp.org> > Subject: TTY ASR-33 Platen? > Date: Fri, 7 Feb 2003 07:59:24 -0800 > Organization: Hearing Research Lab > Reply-To: cctech(a)classiccmp.org > > I have been blessed with *two* Teletype ASR-33's. Apart from a minor > cleaning, they are going to be just fine. EXCEPT the rubber platens are as > hard as Chinese arithmetic! In case you havent experienced this, if the > platen gets hard, the printer doesnt print well-- the typehead kinda bounces > off the paper and doesnt leave a clean dark mark. > > I've tried the usual remedies-- acetone cleans them up, but they're still > rock hard. > > I need some suggestions! Should I try ArmorAll (known to soften rubber, > given time), "Platen cleaner", "belt dressing", "french dressing", or what? > > Note that I don't need to clean or make it "grippier", it needs to be > softened, a lot. > > Regards, > > > George > > --__--__-- > > Message: 23 > From: "Jim Keohane" <jimkeo(a)multi-platforms.com> > To: <cctalk(a)classiccmp.org> > Subject: Re: Assembly on a Apple IIc+ > Date: Sat, 8 Feb 2003 11:06:13 -0500 > Organization: Multi-Platforms, Inc. > Reply-To: cctech(a)classiccmp.org > > Sellam Ismail, > > I'm either being imprecise or various readings I have done were > imprecise. The reference to "one cycle" instruction may have been referring > to there being 2 cpu cycles per clock cycle. Also, there's the "pipelining" > some say the 6502 does when the last (or only) byte of an instruction is > acted upon simultaneous to next instruction's 1st byte (opcode) being > fetched > > So perhaps "one instruction per clock cycle" may be awfully close with > pipelining and with use of zero page. > > Of course, we're talking Apple ]['s which, if I can trust my memory, > steal every other clock cycle to refresh memory. > > Cheers, - Jim > > Jim Keohane, Multi-Platforms, Inc. > > "It's not whether you win or lose. It's whether you win!" > ----- Original Message ----- > From: "Sellam Ismail" <foo(a)siconic.com> > To: <cctalk(a)classiccmp.org> > Sent: Friday, February 07, 2003 18:40 > Subject: Re: Assembly on a Apple IIc+ > > > > On Fri, 7 Feb 2003, Jim Keohane wrote: > > > > > p.s. I also did quite well with 6502 asm code in cpu speed tests vs > > > 80x86 and Z80 programmers. The zero page, for all intents and purposes, > > > is 256 registers. 6502 is single cycle instruction execution. Look up > > > definitions of RISC and the 6502 is arguably RISC-like. > > > > No 6502 instruction takes less than 2 cycles to complete. > > > > Sellam Ismail Vintage Computer > Festival > > -------------------------------------------------------------------------- > ---- > > International Man of Intrigue and Danger > http://www.vintage.org > > > > * Old computing resources for business and academia at > www.VintageTech.com * > > --__--__-- > > Message: 24 > From: "Jim Keohane" <jimkeo(a)multi-platforms.com> > To: <cctech(a)classiccmp.org> > Subject: Re: Assembly on a Apple IIc+ > Date: Sat, 8 Feb 2003 11:13:14 -0500 > Organization: Multi-Platforms, Inc. > Reply-To: cctech(a)classiccmp.org > > Not sure if this was mentioned as another option: > > There's the MERLIN assembler. Versions for ProDos and DOS 3.3. > > - Jim > > Jim Keohane, Multi-Platforms, Inc. > > "It's not whether you win or lose. It's whether you win!" > ----- Original Message ----- > From: "Ron Hudson" <rhudson(a)cnonline.net> > To: <cctalk(a)classiccmp.org> > Sent: Friday, February 07, 2003 00:19 > Subject: Assembly on a Apple IIc+ > > > > What do I need to get started with 6502 Assembly on an apple II? > > --__--__-- > > Message: 25 > From: "lgomez" <lgomez(a)cdromsa.es> > Subject: Re: Grundy Newbrain fix > To: cctech(a)classiccmp.org > Date: Sat, 08 Feb 2003 17:31:42 +0100 > Reply-To: cctech(a)classiccmp.org > > Please, can you say me how can i solve this problem? I've a > Newbrain AD with the same problem. > > Regards > > On Fri, 07 Feb 2003 17:43:50 +0100 > Torben Ring <toring(a)inet.uni2.dk> wrote: > > Hi, > > > > I have a Grundy Newbrain, which wouldn't start, or if it > > started it would only show random chars in the display. > > I've found out what was wrong with the machine and if > > anyone needs help with fixing his (or hers) machine, I'll > > be able to point to the problem. As far as I can tell, > > this is a common problem with all these machines, and it > > only gets worse as time goes by. > > > > Regards, > > > > Torben Ring > > --__--__-- > > Message: 26 > Date: Sat, 08 Feb 2003 11:28:06 -0600 > From: James Rice <jrice54(a)charter.net> > To: cctalk(a)classiccmp.org > Subject: OT Need parts > Reply-To: cctech(a)classiccmp.org > > I need one of the beige plastic headed screws that secure the side cover > on a Dell Dimension case. The is for my UMAX S900 that shares a > PaloAlto Design case with the earlier Dell Dimensions. I also need two > blank drive filler panels for a HP NetServer LC II. > > James > -- > http://webpages.charter.net/jrice54/classiccomp2.html > > > > End of cctech Digest

23 years, 2 months

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Main-frame hard drive (maybe) avaliable

by shawnmhoffman＠yahoo.com

Hello, I just thought of something which might be of interest to someone out there. Several years ago I got ahold of a monsterous main-frame type hard drive. I really have no idea what kind of system it came from, but the box was about three feet long, one foot tall, and one foot wide (as I remember it). The disks inside were about 8-10 inches across (I could see them through a little window in the casing). You could turm two screw like things on the front of the box and then lift the cover. Inside was the disk assembly and then another panel of electronics that would swing down from the cover of the box. This whole monster weighed about 60 pounds or so I would say. On the back were two receptacles for connecting it to whatever computer it originally came from. The plugs that plugged into the recepticles were sqaure as I remember it and there was a flat 1" wide cable that came out of each plug. The cables had been cut off of so I don't know what the other end looked like. On the front of the box there were two or three buttons I think. Probably one reset, one power on/off, and one lock/unlock--that's what I seem to recall. Anyway, I took this hard drive back where I got it from because I couldn't figure out any use for it. But if any of you know how to connect this thing to something and are interested in it I may be able to get it back again. It's been out in the weather for several years, but from my experience wheather doesn't affect computers much--the older ones at least. I have gotten some computers that were snowed and rained on and had mud splattered all over them, but they still worked. There was even one computer I got where the battery had leaked all over the mother board and started to eat it away.....but it still worked!! Needless to say, I was amazed!! Well, let me know if you are intersted in this hard drive. I am raising money for a mission trip and that's part of the reason I wondering if this has any value to anybody. Also I hate to see it "rot" out there. ;-) I can't send you any pictures of the drive itself because I don't have it right now, but I think I do have the cable lying around here yet. I could send pics of that or try to describe it if that would help any. By the way, I think the brand name on this device may have been "Digital"; I could be wrong, but a lot of the other parts I got there were made by the "Digital" company so I suspect the hard drive may have been too. (I also have a large plug-in electronics board from some main-frame type computer that I got at the same place if anybody has an interest in that). I know old main-frame parts have value to the right person and I wouldn't mind trying to get it if someone is interested, but please be sure you are really seriously interested before you ask me to get it! :-) It is more than likely buried under a lot of junk and I would have to dig it out which could be quite a job!! But I would be more than willing to try and get it if you are seriously interested; I just don't want to go through all that work and then be stuck with it myself. :-) I can try to describe it better if that would help, but I'll wait to see if anybody has an interest first. Take care all, Shawn :-) Smile, God loves you!!

23 years, 2 months

4
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Looking for info on UNISYS UN6065 B50 system

by jrkeys＠concentric.net

Got UNISYS UN6065 yesterday at an auction and got only two hits on Google site both no good. Any one know were I can find more? Thanks

23 years, 3 months

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DEC Extenders up for auction

by kyrrin＠bluefeathertech.com

Onwers of DEC Qbus or UniBus boxes; It may interest you to know that I've put up a pair of DEC'ish card extenders for auction on E-pay. Here's the link: http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=1247&item=3401378577 There's a dual-height and a quad-height, selling as a pair, starting at $10.00. Thanks for putting up with another ad. ;-) -=-=-=-=-=-=-=-=-=-=-=-=-=-=- Bruce Lane, Owner & Head Hardware Heavy, Blue Feather Technologies -- http://www.bluefeathertech.com ARS KC7GR (Formerly WD6EOS) since 12-77 -- kyrrin(a)bluefeathertech.com "I'll get a life when someone demonstrates that it would be superior to what I have now..." (Taki Kogoma, aka Gym Z. Quirk)

23 years, 3 months

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OT: SC/SC couplers available (was: Re: 10Base-FL)

by pete＠dunnington.u-net.com

On Feb 9, 9:52, Adrien Farkas wrote: > _these_ 'simplex' aren't really simples, they're duplex, but connected > not side by side, but opposite, which makes a need to cut all my sc > cables into two simplex, which I'd like to avoid. I called it 'simplex', > because I wasn't able to describe it properly. Oh, I see. Yes, hard to describe concisely, I suppose they're a sort of "dual simplex" ;-) > hmm, i might to move to STs, but ut's fddi cabling systems and all my > cards are either SC or MIC (FDDI), so I might need bunch of ST cables > and pigtails. sure, ebay is my friend, but you know, shipping this stuff > to europe is quite expensive ;) and I have lots of fddi & sc cables > already, just missing some stuff to connect it together, this is wher > the couplers come. The fibre in my house and workshop is 50/125 FDDI stuff recovered from work. We don't use FDDI any more so I liberated several 10-metre and 20-metre patch cables, cut off the MICs, and re-terminated them with STs. The tools and materials I needed to do that cost about ?100 from TechOptics (luckily, I could borrow a microscope, so I didn't have to buy that) and it's not hard to do. TechOptics don't have prices on their website but they're much cheaper than most catalogues, and quite helpful on the phone. http://www.techoptics.com It took two evenings to reterminate 4 cables, both ends. One evening to strip, wait an hour to let them rest, then crimp and epoxy the STs; the second evening to cleave and polish the ends. I kept a few shorter cables that are ST-to-MIC and acquired a few ST-to-SC cables when I got my ATM kit. Even most of my FDDI kit uses ST or SC connectors; the only thing I have with MIC connectors (other than adaptors for SGI FDDI cards) is an ATM-to-FDDI bridge. I've not done it myself, but someone I know has done a lot of splicing with gel-filled splices, which are quite cheap (though you really need a splice box as well). You can get them from TechOptics too. However, if you already have most of the cables you need, and just want a few couplers, just buy the couplers. -- Pete Peter Turnbull Network Manager University of York

23 years, 3 months

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HP-85 stuff posted for auction

by Innfogra＠aol.com

A couple of days ago I posted for auction a bunch of HP-85 stuff. More to come as I find it. Includes ROM pacs, a 128K memory pac and a GP-IO & serial interfaces. http://cgi6.ebay.com/ws/eBayISAPI.dll?ViewSellersOtherItems&include=0& userid=innfosale&sort=3&rows=25&since=-1&rd=1 my seller name is innfosale Thanks for putting up with the post. Paxton Astoria, OR

23 years, 3 months

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Sharp IQ-3000 language translator?

by evan947＠yahoo.com

Hello out there... anybody have data on the Sharp IQ-3000, a language translator gadget from 1980? All I can find is the miniscule reference below. http://sharp-world.com/corporate/info/his/chronology/p6.html

23 years, 3 months

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Odd ideas that I've had lately...

by john_boffemmyer_iv＠boff-net.dhs.org

I was sitting at home reading my latest copy of Mouser (component catalog) and I came across LCD GUI touch screen kits and Zilog Z80 kits with USB, Serial and 100Mbit Ethernet. My head being screwed up from pain killers (on worker's comp from slipping on ice at a client's), tried to put 2+5 together to get 4 and gave me an expensive (maybe not) idea. Palms and Visors and the like are really small and great for many tasks, but what if I could take a similar processor, say a Dragonball, an ARM or the even an older one (maybe even a mobile RISC-based CPU - now that would be cool) and link them into a slightly larger and more useful hand-held that has USB, Serial and Ethernet with AD and DC capabilities and toss it into a steel box with rubber seals and rubber/knurled steel outsides and a thin plastic piece covering the display with a metal lock-back cover. I know there are knock-off covers out there for the Visor and the Palm that are sold separately, but the palm doesn't have built in USB or Ethernet or Serial, you are stuck with a bulky add-on or a cradle. What If someone could get around that? Anyone have some thoughts to it? Next leap into less than sanity... I actually considered sitting down and getting a prototype board from another mail order company the other day to build my own AT P200MMX motherboard with PC100/133 SD-RAM support, AGPx and ISA/PCI. Now here's where the idea for this would require the prototype board: built in USB and Ethernet and possibly SCSI on a standard AT board in as small a size as possible while enabling use of as many slots in the back of an AT case for the AGPx, PCI and ISA. I was thinking of using something like an AMD-based Ethernet chip with the prototype board's VIA motherboard chipset. Anyone have comments? Kind of lame or just expensive and nuts? -John Boffemmyer IV ---------------------------------------- Founder, Lead Writer, Tech Analyst and Web Designer Boff-Net Technologies http://boff-net.dhs.org/index.html ---------------------------------------

23 years, 3 months

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Working pga adapter, monitor and manual

by dan.stanger＠ieee.org

Free for shipping from Denver, CO 80222. One catch, you have to take the 286 computer its in.

23 years, 3 months

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Sierra Adventure Games

by cb＠mythtech.net

>> ... Leisure Suit Larry 1, too. > >Hey! I still have LSL1 1.0 - 5.25" original disks, not a copy (fished it >out of a pile of debris left by a departing college student a number of >years ago) > >It's... um... a *classic*! Ah, but do you have "SoftPorn" the game that LSL-1 was a rip off of? I played that on my Apple II eons ago (I just saw it on one of the game archive links that passed thru this list recently in anyone wanted to DL it) -chris <http://www.mythtech.net>

23 years, 3 months

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OT: SC/SC couplers available (was: Re: 10Base-FL)

by pete＠dunnington.u-net.com

On Feb 7, 13:44, Adrien Farkas wrote: > pete(a)dunnington.u-net.com (pete(a)dunnington.u-net.com) wrote : > > >SMAs suck big time, and couplers for STs are expensive. ^^ Oops, did I really write that? I meant that couplers for SCs are expensive; ST couplers are cheap. > a propos fiber couplers, does anyone have a few they might miss? I'm > after SC/SC couplers preferrably with direct SC duplex connector > pluggable. I might get a few, but those aren't ready for duplex > connectors, just single SC simplex. Duplex ones are just two simplex ones side by side. Use tape or glue. -- Pete Peter Turnbull Network Manager University of York

23 years, 3 months

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CCS 2422 Floppy Disk Controller

by ekklein＠pacbell.net

I recently acquired a California Computer Systems model 2422 Floppy Disk Controller Rev B. (S-100) in what appears to be good condition but missing a 2716 EPROM presumably containing the onboard BIOS. Does anyone have this card and the capability of providing me with a copy of the PROM or at least a dump of it? I'd also love to get my hands on the docs, if available. Thank you, Erik

23 years, 3 months

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Interesting finds

by Fred.van.Kempen＠microwalt.nl

Hi, While hauling some VAX and StorageWorks stuff yesterday, I bumped into a Philips PTS6000 machine (actually, two.. a larger one, and a smaller one), some HP stuff (looks like HP Big Iron) and the cabinet of a DECarray system. Anyone interested? Pics available. --fred

23 years, 3 months

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PS2 Mouse

by teoz＠neo.rr.com

I was wondering if there ever was a PC PS2 type mouse addon card for old 386 or previous AT type computers? I know there were bus mice, but thats not the same. The reason I am asking is because I have a PS2 KVM switch and want to get my 386/DX40 computer connected to it (it doesnt have a ps2 header).

23 years, 3 months

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6502 cycles and subtleties (was Re: Assembly on a Apple IIc+)

by pete＠dunnington.u-net.com

On Feb 9, 10:55, Eric Smith wrote: > > Are you sure? My understanding is that PLP and PLA increment the stack > > pointer *before* fetching the byte off the stack. > [...] > > Maybe you're thinking of PHP and PHA ([SP]:=A; SP:=SP+1), which take one > > cycle less than PLP/PLA? > > You're right, I was confused. Phew! I was beginning to wonder if the 6502 is more bizarre than I already knew :-) You missed the mistake though -- I should have written SP:=SP-1 (no it wasn't a test, I only just noticed). -- Pete Peter Turnbull Network Manager University of York

23 years, 3 months

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6502 cycles and subtleties (was Re: Assembly on a Apple IIc+)

by pete＠dunnington.u-net.com

On Feb 8, 19:02, Eric Smith wrote: > Well, I haven't counted them, but pretty much all instructions that > use the ALU do that. This includes ADC, SBC, ORA, AND, EOR, BIT, > and (when the accumulator is the destination) LSL, ASR, ROR, and ROL. > And the PLP and PLA instructions, which increment the stack pointer > using the ALU during the next fetch. Are you sure? My understanding is that PLP and PLA increment the stack pointer *before* fetching the byte off the stack. The 6502 stack pointer always points to the next free location on the stack. It's possible that it does something like: fetch instruction decode, and set up ALU to generate SP+1 fetch [SP+1] add 1 to SP while fetching next instruction Maybe you're thinking of PHP and PHA ([SP]:=A; SP:=SP+1), which take one cycle less than PLP/PLA? -- Pete Peter Turnbull Network Manager University of York

23 years, 3 months

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PS2 Mouse

by teoz＠neo.rr.com

PS2 works off the keyboard controller, I was hoping somebody might have made a specialty board with keyboard controller allowing older machines to use ps2 hardware ----- Original Message ----- From: +ACI-John Allain+ACI- +ADw-allain+AEA-panix.com+AD4- To: +ADw-cctalk+AEA-classiccmp.org+AD4- Sent: Sunday, February 09, 2003 12:37 PM Subject: Re: PS2 Mouse +AD4- +AD4- I could use a USB +AD0APg- PS/2 mouse adapter, so far I have not +AD4- +AD4- found any such animal. I've found plenty that go the other way. +AD4- +AD4- Think this is one. It isn't a passthru. +AD4- http://www.cyberguys.com/cgi-bin/sgin0101.exe?T1+AD0-131+-0870 +AD4- +AD4- +AD4- On the subject... +AD4- I see a lot of PS/2-female to RS232/D9-male adaptors. +AD4- I assume that these are for signal sensing mice, +AD4- since these adaptors Are passthru, and I get the impression +AD4- from this list that PS/2 signals aren't RS232. +AD4- +AD4- John A.

23 years, 3 months

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PDP11 RSX-11M operating system manual

by anheier＠owt.com

Hi, I have a large binder containing a DEC PDP11 RSX-11M System Generation and Management Guide, version 3.2, June 1979. Also included is a RSX-11M/M-Plus MCR Operation Manual and two bound mini references. All are in excellent shape. Best offer + shipping. Thanks Norm

23 years, 3 months

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Odd ideas that I've had lately...

by cb＠mythtech.net

>I'd hate to >hose the PalmOS flash - dunno if there's a way to get it back without >building your own external re-Flasher (in the case of the IIIs and older >that *have* removable SIMMs). I think they may have an ability to recover built in. I know when I upgraded the OS on my wife's IIIx, I had a problem with the upgrade, and the flash didn't complete. The Palm wouldn't boot and I thought I was hosed. But a check in the directions offered a recover method. There is a sequence of button presses you can do that drops the Palm into "debugger" mode, and from there, the upgrade utility could restart the flash process and write the OS again. Of course, you would need a copy of the Flash ROM/OS and a utility to write it. I know you can dump your current ROM to file with the tools in the Palm Emulator available from Palm... but the only tool I know to write it back to the Palm is their OS upgrade tool, which means you would have to shell out for the upgrade (or find someone else that already did and use the software that they have). -chris <http://www.mythtech.net>

23 years, 3 months

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attache' where are you?

by paulm064＠icqmail.com

I have been searching for info of an old laptop computer i have . Following details are all i have found: Attache' Forefront 286 model : LV-286D power supply : 17Volt ? 2.7Amp ? Battery : 12Volt 2200mAH NiCAD 3 pin connector - 9.8"x2.1"x1.1" Has detachable keyboard. Does any know if manufacturer was taken over by another? Need details of power supply and battery connector pollarity and or gifs of same . Don't know where else to look. Thanks Paul

23 years, 3 months

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6502 cycles and subtleties (was Re: Assembly on a Apple IIc+)

by pete＠dunnington.u-net.com

On Feb 8, 11:41, Eric Smith wrote: > Pete wrote: > > You must be thinking of some different 6502 to the rest of us :-) As > > Sellam said, no 6502 opcode takes less than two clock cycles to > > execute, and most take more (up to 7): the only 2-cycle instructions are > > the ones with implied addressing, like RTS, CLI, TAX, ... > > Not RTS, that takes a bunch. Oops, wrong column! Yes, it takes 6. > There is a little bit of pipelining internally, but it's not really > obvious. The last ALU operation of an instruction is generally done > during the same clock cycle as the fetch of the next instruction. > For instance, when you do an "ADC #35" instruction (add with carry > immediate), it's a two-cycle instruction, but it really takes three > cycles to complete -- the third cycle is overlapped with the following > instruction's fetch. During the first cycle the opcode is fetched, > during the second cycle the immediate operand is fetched, and during the > third cycle, which is the first cycle of the next instruction, the actual > add occurs. True. Most instructions don't work like that, though. > > There aren't two CPU cycles per clock cycle. Perhaps you're thinking of > > the fact that the 6502 uses a two-phase clock, and does part of the CPU > > cycle during phi-1, and part during phi-2? > > Perhaps the original poster thought that, but it's just the old standard > two-phase NMOS logic. It takes two phases to do just about anything > internally, so it's not a matter of doing two things sequentially in > one clock cycle. (A small number of things occur in parallel in some > cycles, though.) Yes, *I* know that, but I don't think Jim did :-) -- Pete Peter Turnbull Network Manager University of York

23 years, 3 months

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ast cc-232 serial card

by n8uhn＠yahoo.com

I am looking for a copy of the manual of jumber/switch settings and pinout's of the ast cc 232 async/sync serial card. looking at the jumper page (after the link was posted) i found nothing. jpg scans to my email would be great - just attach them. n8uhn at yahoo dot com (replace the "'dot" with "." and "at"' with "@" Thanks, Bill

23 years, 3 months

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Assembly on a Apple IIc+

by pete＠dunnington.u-net.com

On Feb 8, 16:12, Jim Keohane wrote: > I'll type more slowly: > > Question #1: > > If an instruction that takes two cpu cycles (as Sellam Ismail cited as a > minimum) and there are 2 cpu cycles per clock cycle then how many clock > cycles did this one instruction take? > > Answer: one. NO. There NOT two CPU cycles per clock cycle. Sellam cited two CLOCK cycles minimum per instruction. He is correct. I've been been building 6502-based devices and programming 6502 code on and off since 1981, and I suspect Sellam has been arund 6502s nearly as long; we're both accustomed to calculating how many cycles routines take. The 6502 uses several clock cycles per CPU cycle -- if by cycle you mean a fetch-execute cycle. That's exactly the opposite of what you're claiming. > OK. OK. I'm being cute. But the 6502, sans Woz's Apple ][ > sneakiness for video, can do two memory fetches per clock cycle. No, it can't. Go read the data sheet. The *system* can, providing your memory is fast enough that you can run it twice as fast as the CPU -- which the Apple and some other machines did -- and providing you have *something else* (eg, the video) doing its memory access only during the clock phase that the 6502 doesn't use for memory access. It is the clock edges that trigger the 6502 to perform the memory access. > Question #2: > > If someone writes "pipelining" and encloses it within quotes does that > indicate to you that the term is being used, well, advisably? > > Answer: Visit groups.google.com and search for "pipelining" and 6502 (or > related processor). [...] > =====excerpt 3======================= > > The 6502 _IS_ pipelined, but in ways that are not very dramatic or even > obvious > unless you look at the CPU's internal operation in detail. Rockwell touted > the > pipelining in their 6502 user's guide years ago, it is essentially this: > > When you do a ADC of something, the last cycle of the instruction is when > the > actual data byte is read in, right? Immediately after that the next opcode > is > read so the next instruction has started, right? So when did the 6502 add? > > It added while the next opcode was being read. The accumulator does not > actually hold the new value until sometime during the second half (forget > exactly where) of the opcode cycle of the next instruction. > > That's pipelining. It saves you a cycle on every instruction that does an > ALU > operation. It may not be as spectacular as what's being done on the monster > RISCs these days but it is essentially pipelining. Yes, but only on a small number of the instructions. I'm sure other microprocessors of the day did that, Rockwell marketing not withstanding. > I'd say you got me on the "one cycle per instruction" but you jumped the > gun on the pipelining issue. OK? Well, maybe, but the 6502 is not basically a pipelined processor, in the sense that only a few instructions do anything close to pipelining, and not even all the intructions that use the ALU do so. -- Pete Peter Turnbull Network Manager University of York

23 years, 3 months

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PACEMIPPS?

by rigdonj＠cfl.rr.com

Can anyone tell me exactly what a PACEMIPS PIMM - 33SG144C is? It's made by Performance Semiconductor but it's not listed on their (POOR!) website. I THINK it might be an R33000 embedded processor but I'm not sure. Joe

23 years, 3 months

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Micom 2000 ?

by rigdonj＠cfl.rr.com

Lawrence, I found an old message from you in the CC archives while I was searching for info on the Micom 2000. In the message you said that you have a Micom 2000. Can you tell me what kind of disks it uses? I know that they're hard sectored 8" SSDD floppies but I don't know how many sectors they use. I picked up a case of sealed boxs of 8" floppy disks today at a hamfest and the case and boxs say that they're for the Micom 2000. Joe

23 years, 3 months

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CCS 2422 Floppy Disk Controller

by classiccmp＠vintage-computer.com

I recently acquired a California Computer Systems model 2422 Floppy Disk Controller Rev B. (S-100) in what appears to be good condition but missing a 2716 EPROM presumably containing the onboard BIOS. Does anyone have this card and the capability of providing me with a copy of the PROM or at least a dump of it? I'd also love to get my hands on the docs, if available. Thank you, Erik **Resent from the proper account**

23 years, 3 months

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WANTED: RA7x Enclosure/Operator Ctrl. Panel

by jwillis＠arielusa.com

As I understand it, the drives won't spin up without the panel. I currently have full technical documentation for pretty much every DEC hard drive EXCEPT the RA70. One of my bosses was a field service engineer for DEC for 15 years, and the other worked for 22 years as the senior district representative for New Mexico, West Texas, Colorado, Utah, Arizona, and Nevada and was a storage subsystems specialist. They both agree that you need the control panel. They also both agree that I'm nuts for caring. -----Original Message----- From: Ethan Dicks Sent: Sat 2/8/2003 7:21 AM To: cctalk(a)classiccmp.org Cc: Subject: Re: WANTED: RA7x Enclosure/Operator Ctrl. Panel --- John Willis <jwillis(a)arielusa.com> wrote: > Wanted: RA7x Enclosure/Operator Ctrl. Panel Are these things common/rare? Absolutely required or are they just very nice to have? I have a couple of RA70 drives I got in a box with some KDA50s. Was going to put them in my BA123 with a KA630 processor. Haven't had the chance - still using a pair of RD54s. So... has anyone tried to put RA7X drives in a CPU (not disk) enclosure? If I'm hosed, then I guess I'm in the market for a drive enclosure, too (unless there's some way to hack up an old AT-style tower case...) -ethan [demime 1.01a removed an attachment of type application/ms-tnef which had a name of winmail.dat]

23 years, 3 months

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TTY ASR-33 Platen?

by grg＠umn.edu

I have been blessed with *two* Teletype ASR-33's. Apart from a minor cleaning, they are going to be just fine. EXCEPT the rubber platens are as hard as Chinese arithmetic! In case you havent experienced this, if the platen gets hard, the printer doesnt print well-- the typehead kinda bounces off the paper and doesnt leave a clean dark mark. I've tried the usual remedies-- acetone cleans them up, but they're still rock hard. I need some suggestions! Should I try ArmorAll (known to soften rubber, given time), "Platen cleaner", "belt dressing", "french dressing", or what? Note that I don't need to clean or make it "grippier", it needs to be softened, a lot. Regards, George

23 years, 3 months

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MicroVAX 3800 Power Cable

by pete＠dunnington.u-net.com

On Feb 7, 23:21, Tony Duell wrote: > > On Feb 6, 22:33, Tony Duell wrote: > > > > > I don't see how you can do a proper test without a visual inspection > > of > > > the connections... And I've yet to see a moulded connector that > > provides > > > a proper strain-relief for the cable. > > > > A good PAT tester will check at a sensible current (though admittedly a > > lot only check earth continuity at a proper current). As for strain > > I've never met a PAT tester that tests the current-carrying conductors at > a significant current, mainly because there's no easy way to do this > without dismantling the unit under test (if the cable is fixed) -- the > maximum current you could pass would be the normal operating current of > the unit (by simply applying mains to it), which is not enough. Even then > you couldn't measure the voltage drop across one of the conductors. A proper PAT tester to current standards has a socket for each end of an IEC cable, and each cable is supposed to be individually tested with both ends plugged in to the tester. > > releif, well you're not supposed to swing the equipment by the power > > cable, Tony! > > True, but equally I don't expect the outer covering of the cable to pull > out of the moulded connector in normal use exposing the single-insulated > wires inside. Which has happened to many moulded cables round here. I've only seen one do that -- and it was an instant candidate for the wirecutters at both ends. A proper visual inspection is supposed to be the first part of the PAT. > I assume you'd fail a rewirable plug with the cord grip missing/not used > on an electrical safety test. I certainly would. Yes. The first thing I do with any multiblock is take it apart to see how the ends are wired -- the cheap ones are usually in a condition where I feel compelled to re-do the job. -- Pete Peter Turnbull Network Manager University of York

23 years, 3 months

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Tandy 1400 HD

by debann17＠yahoo.com

My uncle is lettingme re-set up his old tandy 1400 hd. The battery and everythign appears to be working fine. However, MS-Dos is not loading from the harddrive or from disk. Any suggestions on what cold be wrong? Thank you debann17

23 years, 3 months

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Kaypro II available.

by aje＠technet2000.com.au

I have two Kaypro II that I have owned from new. Both are upgraded to run at higher clock speeds and one has a cooling fan fitted. One has the PC8 ROM There is a complete set of the bundled distribution software (Select, Perfect Writer etc) with manuals, including that really first class ground breaking program SBasic, and other programs that I wrote in SBasic including multi variable non linear regression analysis. Also Unidos and etc which allows the floppy drives to emulate those of other machines. I used one of these machines to run the first simulation of the CSIRO Sydney to Melbourne high speed railway. What price might one expect for such a a machine?. Alan Emmerson Brisbane QLD Australia

23 years, 3 months

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Grundy Newbrain fix

by toring＠inet.uni2.dk

Hi, I have a Grundy Newbrain, which wouldn't start, or if it started it would only show random chars in the display. I've found out what was wrong with the machine and if anyone needs help with fixing his (or hers) machine, I'll be able to point to the problem. As far as I can tell, this is a common problem with all these machines, and it only gets worse as time goes by. Regards, Torben Ring

23 years, 3 months

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Qube

by Tcampbelluk＠aol.com

Just read some interesting articles of nostalgia on the Warner Qube site on Yahoo while researching for an article I'm doing over here (England). I was the first President of Warner Qube system in Pittsburgh which was the first fully blown QUBE system after the Columbus, and what an experience. I then went on to Milwaukee and Brooklyn,Queens. If I can find any of my old info and if you are interested I will dig it out. ( I went on to help develop 2 of the largest U.K. cable/telephone systems for Comcast as Managing Director of Birmingham England Cable and Comcast Teesside (England). In each case we supplied cable and telephony service to more resident than the normal provider (British Telecoms) Hope this may be of help, if only historically. Ted Campbell

23 years, 3 months

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Looking for source of MFM or RLL drives

by kelly＠catcorner.org

Yes, the OS allows entering of drive geometry. Actually only supports MFM up to 70Meg. RLL drives will of course work, just not to RLL capacity. I'm looking for the largest drives I can find. From: Ethan Dicks --- Kelly Leavitt <CCTalk(a)catcorner.org> wrote: > Any good sources of MFM or RLL drives. This would be for a Tandy 6000 > running Xenix. > > I'm looking for 70 Meg or higher MFM (110 RLL capacity). Hmm... those aren't so common (in the DEC world, there are two choices - the RD53 (Miniscribe 1325) and the RD54 (Maxtor XT2190). I take it you aren't constrained by a narrow set of expected geometries? (i.e. - you have a running system and/or the install procedure asks you about the drive rather than assuming?) -ethan

23 years, 3 months

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10Base-FL

by pete＠dunnington.u-net.com

On Feb 5, 5:38, vance(a)neurotica.com wrote: > I'm about to put some 10Base-FL in and I was wondering if someone could > tell me what kind of fiber I should be looking for? Is it 50/125 MMF like > GigE? Or is it 62.5/125 MMF like FDDI? It will work fine with either. In theory, you get slightly higher coupling losses with 50/125 but can run slightly longer lengths; in practice it makes little difference. My advice is to stick to one kind or the other for everything. York Uni has always used 50/125 for everything (from the original FDDI and FOIRL through ATM and now 100baseFX and 1000baseSX) -- and we're smiling now that it's come back into vogue. BTW, stick to ST connectors where you can. SMAs suck big time, and couplers for STs are expensive. -- Pete Peter Turnbull Network Manager University of York

23 years, 3 months

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