- 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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