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

VAXStation 2000 stuff

by clintw＠colorado.cirrus.com

Hiya, > > > > A few days ago, I undertook to install a Maxtor XT2190 (that had > previously been used in a PC running DOS) in my VAXStation 2000. I > brought up T 70 and, to my relief and joy, it scanned the disk and > declared it an RD54! The relief came since I was not at all sure that > I could come up with all of the data that T 70 requires when it goes > into query mode. Is there a program that can extract that data from a > 'real' RD54? > The values for the prompts can be found in: http://anacin.nsc.vcu.edu/~jim/mvax/mvax_faq_text.html Just load this page, and the search for "test 70". There is another page somewhere that describes how to calculate the media ID, but I forget the URL. > At any rate, the format proceeded smoothly and with the help of > Standalone Backup I loaded VMS 5.5 and the Mandatory Update on to the > drive. I want to bring VMS up to v5.5.2, but do not know whether I > need load both v5.5.1 and then v5.5.2 or whether just v5.5.2 is enough. > I presume that this is done as an Update using VMSINSTAL. Correct? > > - don I dunno, I don't use VMS, but I got a lot of layered product licenses w/tapes. clint

27 years, 2 months

1
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BASIC

by sring＠uslink.net

I'm interested in the old line numbered basics. Are there any web sites or email lists regarding programming in the old basic languages? Stephanie sring(a)uslink.net

27 years, 2 months

8
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Has anyone ever seen an ECD Micromind computer?

by jlewczyk＠his.com

The Comprehensive Computer Catalogue at http://plato.digiweb.com/~hansp/ccc/ccorgs.htm lists this computer as follows: ---------------------------------------------------------------------------- ----------- "The ECD Corp's MicroMind was a 6502-based computer dating to around the time of the Apple II. It had memory management (!) and an advanced video display with downloadable fonts, up to 132 characters per line, and smooth scrolling. The prototypes were wire-wrapped, as were the initial (and only, alas) models that were actually sold. Its smooth-scrolling capability, unique among micros at the time, made it attractive to hospitals to present the list of TV stations avilable on hospital channels. The cost of $8K was no object. The plan was to go to printed-circuit board, and ads were taken out in Byte magazine offering the machine for $1500. Orders poured in, but the PC version never appeared (the orders were all refunded). The 3 founders of ECD laid off all its employees and held on for awhile, but ECD itself eventually went bankrupt." ---------------------------------------------------------------------------- ------------ I have a number of their ads and was wondering whether anyone has ever seen one of these machines in person, or knows any one of the developers.

27 years, 2 months

1
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Mac II stuff needed/wanted

by SUPRDAVE＠aol.com

In a message dated 5/11/99 10:00:40 PM US Eastern Standard Time, roblwill(a)usaor.net writes: > I'm trying to set up a basic peer-to-peer network between my P200, a P70, > the Mac, and a 5170 in the garage. I have cards for the PC's, but I need > one for the Mac. I'm not sure what kind of card I need (first experience > with a network), so I hope the ones I have for the PC's are the correct type > (they have the BNC connector). Is there any way to tell what type they are > by looking at them? well, any mac II series will need a nubus NIC. If most of the NICs have the bnc (coax) connector, you'll have to get the same for the mac. Good thing is that coax NICs (10base2) are easier to find since they are older. I was lucky to find a combo NIC for my IIsi.

27 years, 2 months

3
2
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static bags

by pete＠dunnington.u-net.com

On May 11, 21:45, Jay West wrote: > Subject: static bags > I've pretty well run out of my supply of PCB antistatic bags (appropriated > from inbound work shipments) for storing spare cards. > > Does anyone know of a cheap source for antistatic ziplocks for storing cards > in? I have heard of just using aluminum foil, etc. Any words of wisdom from > the list? Most electronics suppliers should sell them, though you might have to buy them in tens or hundreds. they're certainly easy to get here. Another cheap sopurce is often PC shops that assemble PCs; they get interface cards and hard drives in them, and tend to throw them away. The silvered ones are static shielded and static dissipative, the black conductive ones are static dissipative, the pink ones are not very good at anything (except perhaps keeping the dust off). -- Pete Peter Turnbull Dept. of Computer Science University of York

27 years, 2 months

2
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New-fangled languages (was: BASIC

by cfandt＠netsync.net

Upon the date 07:51 AM 5/12/99 -0700, Fred Cisin (XenoSoft) said something like: >> >> I'm interested in the old line numbered basics. Are there any web >> >>sites or email lists regarding programming in the old basic languages? >> >Yipes, I thought they were all that way. ;) Then again I learned basic on a >> >Data General via teletype. What sort of questions do you have? >On Wed, 12 May 1999, Christian Fandt wrote: >> Gee Stephanie, that question makes some of us feel *old*! :-) >> Us 'older folks' learned BASIC back in the old days and knew it as always >> having line numbers then. Mike falls within "our group" it appears. > >So, it's true!? There really are new dialects of BASIC without >line numbers! And dialects of FORTRAN that don't require a FORMAT >statement! And did you hear about "Visual COBOL"?? Yep! Imagine that! > > >What is this world coming to? It's plumb gone to Hell in a handbasket! :) Seriously, the newer compilers/interpreters for the old time languages such as BASIC, FORTRAN, etc. are benefiting from new ideas introduced in the new generation of languages. This is of course possible not just because of new thinking but because cheaper memory and cheaper mass storage allows code to be added which implement those new fangled ideas. Kinda gotten out of hand nowadays it seems judging from the amount of code bloat found in some new compilers. Back in the early days when every single byte of RAM and disk storage counted, no matter what new idea came along it was hard to implement as it had to be supported by hardware resources. And those resources were either not invented yet or way too expensive for the majority of users. > >-- >Grumpy Ol' Fred cisin(a)xenosoft.com Regards, Chris -- -- Christian Fandt, Electronic/Electrical Historian Jamestown, NY USA cfandt(a)netsync.net Member of Antique Wireless Association URL: http://www.ggw.org/awa

27 years, 2 months

1
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BASIC

by jlwest＠tseinc.com

And of course, let's not forget TimeShare BASIC on the HP2000! <grin> It ran on 2100, 21MX, and 21MXE systems (all HP). That system brought up a BASIC environment on each terminal (no access to other languages, etc.). No editor either, to replace a line you just retyped the line using the same line number. According to Jeff Moffat's website, there was also a multiuser BASIC available on the 2100. It appears to be a stripped down precursor to TSB. Matter of fact, he has an emuator AND the images for the multiuser BASIC available on his website. IIRC, it's at http://oscar.taurus.com/~jeff/2100 Cheers! Jay West -----Original Message----- From: Christian Fandt <cfandt(a)netsync.net> To: Discussion re-collecting of classic computers <classiccmp(a)u.washington.edu> Date: Wednesday, May 12, 1999 8:43 AM Subject: Re: BASIC >Upon the date 02:35 AM 5/12/99 -0700, Mike Ford said something like: >>> I'm interested in the old line numbered basics. Are there any web >>>sites or email lists regarding programming in the old basic languages? >>>Stephanie sring(a)uslink.net >> >>Yipes, I thought they were all that way. ;) Then again I learned basic on a >>Data General via teletype. What sort of questions do you have? >> > >Gee Stephanie, that question makes some of us feel *old*! :-) > >Us 'older folks' learned BASIC back in the old days and knew it as always >having line numbers then. Mike falls within "our group" it appears. >Nowadays, the apparent influences of other structured languages like the >Pascal flavors, ADA, C/C++, etc. have allowed modern BASICs to be designed >to not use line numbers, and hence, be somewhat more structured :) > >First BASIC I came across that didn't have line numbering was BASIC-09 that >I used on my OS-9/68k industrial computer in the late 80's. The BASIC-09 >was first written for the 6809-based Radio Shack Color Computers (early >80's vintage) which ran OS-9 Level 1 and was eventually ported over to the >68000 level of OS-9. Compared with the OS-9 Pascal I also had, it looked >quite similar. That brought me renewed respect for BASIC. *Structured* >BASIC, that is. > >Regards, Chris >-- -- >Christian Fandt, Electronic/Electrical Historian >Jamestown, NY USA cfandt(a)netsync.net >Member of Antique Wireless Association > URL: http://www.ggw.org/awa >

27 years, 2 months

1
0
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Board Cleaning Opinions Wanted

by mbg＠world.std.com

>If you had a pile of impossibly dirty DEC Q-Bus boards, >what would you do? (This includes the usual disk controller card, >CPU/IO/Memory extender, a couple of corestacks, the backplane, >and the regulator card). Allison keeps mentioning putting them in the dishwasher... I'm somewhat hesitant to do so. But she's had good luck with doing it... I'm sure she'll pipe in here with info on how to do it... Megan Gentry Former RT-11 Developer +--------------------------------+-------------------------------------+ | Megan Gentry, EMT/B, PP-ASEL | Internet (work): gentry!zk3.dec.com | | Unix Support Engineering Group | (home): mbg!world.std.com | | Compaq Computer Corporation | addresses need '@' in place of '!' | | 110 Spitbrook Rd. ZK03-2/T43 | URL: http://world.std.com/~mbg/ | | Nashua, NH 03062 | "pdp-11 programmer - some assembler | | (603) 884 1055 | required." - mbg | +--------------------------------+-------------------------------------+

27 years, 2 months

5
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static bags

by edick＠idcomm.com

If memory serves, there are two classes of protective wrap which are SUPPOSED to be used. One, the "primary" packaging layer, is supposed to be moderately conductive so that it forms a protective layer around the entire perpiphery of the card, thereby protecting it (the card) from spot chrges transferred to it by handling. The other, the "secondary" packaging layer, is intended to provide mechanical protection for the card and its primary packaging. Common examples of the primary packaging include the black conductive bags we commonly see used for this purpose. The pink-poly bags and bubble wrap, etc, are anti-static but not conductive, and are consequently qualified as "secondary" packaging, as they create no static charge on their own, but don't do anything to dissipate it. Aluminum foil, properly applied will qualify as primary packaging, though it's not ideal due to its fragility. The fact that it will discharge batteries and other things likely to be found on a board causes other concerns, but, PROPERLY applied, it will serve as primary ESD-protective packaging. Dick -----Original Message----- From: Zane H. Healy <healyzh(a)aracnet.com> To: Discussion re-collecting of classic computers <classiccmp(a)u.washington.edu> Date: Wednesday, May 12, 1999 12:27 AM Subject: Re: static bags >>I've pretty well run out of my supply of PCB antistatic bags (appropriated >>from inbound work shipments) for storing spare cards. >> >>Does anyone know of a cheap source for antistatic ziplocks for storing cards >>in? I have heard of just using aluminum foil, etc. Any words of wisdom from >>the list? >> >>Jay West > >Sadly our new servers are using different hard drive sleds, the ones we'd >been using were perfect for dual and quad height DEC boards, and I'm about >out also. > >I've a question along this line, what about newspaper? I've used that, but >I've heard recently that's not a good idea. > >I've gotten boards wrapped in foil, not sure if they worked, don't remember >if I tested them (scares the H*** out of me having them wrapped that way >even though I hear it's safe) > > Zane >| Zane H. Healy | UNIX Systems Adminstrator | >| healyzh(a)aracnet.com (primary) | Linux Enthusiast | >| healyzh(a)holonet.net (alternate) | Classic Computer Collector | >+----------------------------------+----------------------------+ >| Empire of the Petal Throne and Traveller Role Playing, | >| and Zane's Computer Museum. | >| http://www.aracnet.com/~healyzh/ |

27 years, 2 months

1
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static bags

by danburrows＠mindspring.com

>>I've pretty well run out of my supply of PCB antistatic bags (appropriated >>from inbound work shipments) for storing spare cards. >> >>Does anyone know of a cheap source for antistatic ziplocks for storing cards >>in? I have heard of just using aluminum foil, etc. Any words of wisdom from >>the list? The best price I have found recently is from Contact East (800) 743-8181. http://www.contacteast.com The following is per hundred of each size. 6X10 $7.70 10X12 $13.50 12X18 $24.80. These are the sizes I just recently bought to cover dual, quad and hex width DEC boards. Granted they are only 1.6 mil but I only use them for end user sales. I have talked one of the scrappers I work with into saving the ones he gets in for everything else. Dan

27 years, 2 months

1
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Commodore cassettes

by mranalog＠home.com

Doug Spence said: > Wow! I guess you really MUST be the senior software engineer to have > a C64 dev station at work. :) (Not a comment on age, a comment on > being allowed to have cool toys at work.) I have my office full of some of my favorite toys, and a large selection of classic computer documentation. It's a great stress reliever. > 25.5K doesn't seem too bad, but after reading the rest of your > description and the sample output from your program, maybe it *isn't* > good enough. The differences between the short and long pulses aren't > very big. You're using 15 samples as your cutoff between short and > long, and I see that 14, 15 and 16 appear. That's shaving it pretty > close! Like I said, I stopped at this point, but you'll notice that once you read pass the two cycles that make up the sync bit, the rest of the cycles in that byte consist of one large cycle and one small cycle. If you compare the cycle lengths IN PAIRS then the different in small and large cycles becomes more pronounced and you can forget about the 15 samples definition.(One has to be smaller than the other) I didn't find the header format reference I mentioned, I do know that the header is read into the cassette buffer and I believe that make it about 191 or 192 bytes long. I also know that when the header is loaded into the cassette buffer in the C64: $033D - Low byte of start address $033E - High byte of start address $033F - Low byte of ending address $0340 - High byte of ending address $0341 - Start of the filename Looking at the printout I sent, it looks to me that the header starts with 9 to 1 countdown, then the header ID number. I (again) believe that 01 is the ID for a program header and 04 is the ID for a data file header. Then you have the start address (01 08 = $0801) and the ending address (23 08 = $0823). Followed by the filename. --Doug ==================================================== Doug Coward dcoward(a)pressstart.com (work) Sr. Software Eng. mranalog(a)home.com (home) Press Start Inc. http://www.pressstart.com Sunnyvale,CA ====================================================

27 years, 2 months

1
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(no subject)

by Stukncyber＠aol.com

Hi, I came across your address while researching Osborne computers. My mom is moving, and in packing her things, we came across my late father's Osborne Model OCC1 computer, printer, and original manuals. The unit was barely used, as my father passed away shortly after purchasing it. I was wondering if there is any interest out there for this piece of computer technology history--either via purchase or donation. Thank you for your time.

27 years, 2 months

2
1
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static bags

by pete＠dunnington.u-net.com

On May 11, 23:16, Zane H. Healy wrote: > I've gotten boards wrapped in foil, not sure if they worked, don't remember > if I tested them (scares the H*** out of me having them wrapped that way > even though I hear it's safe) Foil is fine[1], because it's conductive, just like black conductive plastic bags and black conductive foam, only more so, of course. The drawback is that it tends to get punctured by the protruding leads and is easily torn. The point of any static dissipative system is to keep everything at the same potential. [1] except for anything that has a backup battery on board, or for a few CMOS real-time-clock chips (most are OK, though). -- Pete Peter Turnbull Dept. of Computer Science University of York

27 years, 2 months

1
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Acorn RiscPC 600 (OT - only 5 years old)

by pete＠dunnington.u-net.com

On May 12, 6:50, Pete Joules wrote: > I found the commmand line interface 'by accident' simply pressing all of the > non alpha keys in turn, F12 scrolled the desktop up by one line and a * > prompt appeared so as a first guess I typed 'help' and found what appears to > be quite a comprehensive help system. The only trouble is, I can't find a > way back to the desktop without resetting it :(. Assuming the default settings for the system is the desktop, you can get back simply by pressing the RETURN key on a line by itself (no spaces, etc). You can see the system settings by typing *status. You can set them with *configure. You can see the environment settings (which mostly also apply to the desktop) with *show. You can set them with *configure. You can enter BASIC from the command line with *BASIC. And so on... All of these commands accept abbreviations, eg *sh. for *show. They're not case-sensitive, by the way. -- Pete Peter Turnbull Dept. of Computer Science University of York

27 years, 2 months

1
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(fwd) Free HP-9000 system

by donm＠crash.cts.com

From: Don Maslin <donm(a)cts.com> To: classiccmp(a)u.washington.edu Subject: (fwd) Free HP-9000 system -- forwarded message -- Path: nusku.cts.com!mercury.cts.com!nntp.flash.net!newsfeed.usit.net!remarQ-easT!remarQ73!supernews.com!remarQ.com!remarQ69!not-for-mail From: zonn @ zonn . com (Zonn) Newsgroups: sdnet.forsale Subject: Free HP-9000 system Date: Tue, 11 May 1999 23:31:58 GMT Organization: Posted via RemarQ, http://www.remarQ.com - Discussions start here! Lines: 27 Message-ID: <3739bde8.19667537(a)news.supernews.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Trace: 926465326 MWA72TVIJC708CCD8 usenet49.supernews.com X-Complaints-To: newsabuse(a)remarQ.com X-Newsreader: Forte Agent 1.5/32.451 Xref: nusku.cts.com sdnet.forsale:1211 Somebody out there must collect these old things? System includes: Qty Part ---- ---- 1 HP-9000 CPU 2 HP-9144 Tape drive 1 HP-9121 Floppy Disks 1 HP-9122 Floppy Disks Many Sketch Pro digitizing pads 2 Think Jet Printers (HPIB) 2 Paint Jet Printers (HPIB) Some Miscellaneous odds and ends, includes box of operating system tapes. 0 Documentation First person to email, and is able to pick up (or I'm willing to drop off) takes it all. But you got to be smart enough to remove all the spaces in the following email address: zonn @ zonn . com I'm not interesting in shipping this anywhere, I'm in the North County area of San Diego, CA -Zonn -- end of forwarded message --

27 years, 2 months

1
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Mac II stuff needed/wanted

by roblwill＠usaor.net

I probably should have been more specific about the network card I need. I'm trying to set up a basic peer-to-peer network between my P200, a P70, the Mac, and a 5170 in the garage. I have cards for the PC's, but I need one for the Mac. I'm not sure what kind of card I need (first experience with a network), so I hope the ones I have for the PC's are the correct type (they have the BNC connector). Is there any way to tell what type they are by looking at them? ThAnX, -- -Jason Willgruber (roblwill(a)usaor.net) ICQ#: 1730318 <http://members.tripod.com/general_1> BTW: My school ran a token ring network until this year. They had a full 256bps transfer rate by the time the computers in the basement got connected (which took about 30 minutes). -----Original Message----- From: Stan Perkins <stan(a)netcom.com> To: Discussion re-collecting of classic computers <classiccmp(a)u.washington.edu> Date: Tuesday, May 11, 1999 6:21 AM Subject: Re: Mac II stuff needed/wanted >Jason Willgruber wrote: >> >> I'm not sure if this in On-topic or Off- topic. What year was the Mac II >> introduced? > >I bought my first Mac II in September 1987. > >> Does anyone have, or know where I can get, for a fairly low price a MIDI >> card for a Mac II? I'm also looking for a network card for a Mac II. > >If you want a Token Ring NuBus card, I've got one you're welcome to >have. > >Regards, >Stan >

27 years, 2 months

1
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New find

by jrkeys＠concentric.net

Today at a Police auction I picked up IBM AS/400 model 9309 for $25 for the rack and other parts. Not sure when I will be able to fire it up.

27 years, 2 months

4
6
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Board Cleaning Opinions Wanted

by jlwest＠tseinc.com

But wouldn't the water jets in a dishwasher play havoc with those small ECO wires? Jay West

27 years, 2 months

1
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Board Cleaning Opinions Wanted

by jeff.kaneko＠juno.com

Thanks to everyone who offered advice; something I was thinking was to use warm water, and some dishwashing liquid. Does that seem safe? I used to use something similar when I worked for FLUKE-- we'd use water with like a mild detergent. But then, these boards were specifically manufactured to be cleaned this way. I'll leave the corestacks alone (well, I'll use a soft brush to remove the dust from the *outside* of the 'sandwich'). Thanks again, guys. Jeff On Tue, 11 May 1999 09:05:06 -0400 (EDT) allisonp(a)world.std.com writes: > > >Allison keeps mentioning putting them in the dishwasher... > > >I'm somewhat hesitant to do so. But she's had good luck > > >with doing it... > > > > That kind of scares me also. I've had good luck with Mac's with a > deep > > sink, mild detergent, and a rather large food dryer. > > The PDP-8f boards (except core and FP) were cleaned in the dish > washer. > All that needs to be done is put them in like plates and use the > standard > dishwasher soap remove before the dry cycle (too warm) and dry in a > 160-170 degree Farenheight oven. A little air to get water from > under > chips is not a bad thing. High pressure air can be deadly as some > boards > may have jumpers and ECO wire that can easily be bown off with > 120psi air! > > Same for scrubbing as solvents like Isopropanal will swell some > plastics > used then and the tooth brush may remove part numbers you may later > need > to read. > > Allison > ___________________________________________________________________ You don't need to buy Internet access to use free Internet e-mail. Get completely free e-mail from Juno at http://www.juno.com/getjuno.html or call Juno at (800) 654-JUNO [654-5866]

27 years, 2 months

7
6
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Commodore cassette format

by pete＠dunnington.u-net.com

On May 11, 11:00, John Foust wrote: > At 10:16 AM 5/11/99 -0500, Doug Spence wrote: > >BTW, what is a "Hurkle" tape? :) > > Hurkle was a game, way back when. I don't remember the theme offhand. > I don't know where it originated, but I'm sure it was in Computer Lib > and/or David Ahl's early books. It's in "BASIC Computer Games", and also on one of the RSTS tapes, I think. It's one of the classic guess-the-location games; the hurkle hides on a X by X grid, you guess which square, and for each guess, the computer tells you roughly which direction you'd have to go in to reach it. Anyone who can't bear to miss it, can see hurkle and other exciting inducements on my Exidy Sorcerer, at York University's Open Day tomorrow (Wednesday). The Computer Science Department has a small exhibit of historical micros, including a PDP11/23 running 7th Edition UNIX, an Apple ][, a PET 2001-8K (calculator keyboard, and the original PET MOONLANDER program), Sorcerer, BBC Model B (running Elite and REVS), Apple Mac Plus, Archimedes A310 (serial no.2, running RISC OS, and acting as the tape drive for the Sorcerer :-)), SGI Indigo R3000. I'd show more of my collection, but there's not enough room. -- Pete Peter Turnbull Dept. of Computer Science University of York

27 years, 2 months

1
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OT: Matrox Millenium II RAM Upgrade

by healyzh＠aracnet.com

I realize this is totally off topic, but I've really no idea where to go with a PC question. After months of searching I managed to aquire a brand new Matrox Millenium II PCI 4Mb Video board, and a 4Mb expansion. Stupid question, which way does the expansion plug in? I've no doc's for the expansion and the Matrox web site seems to be useless! For the curious, yes, there is a reason I've been searching for one of these boards for months. It's about the best board supported by OPENSTEP, it is also supported by BeOS, Linux, and some flakey little OS or two out of Washington. Zane | Zane H. Healy | UNIX Systems Adminstrator | | healyzh(a)aracnet.com (primary) | Linux Enthusiast | | healyzh(a)holonet.net (alternate) | Classic Computer Collector | +----------------------------------+----------------------------+ | Empire of the Petal Throne and Traveller Role Playing, | | and Zane's Computer Museum. | | http://www.aracnet.com/~healyzh/ |

27 years, 2 months

2
1
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Acorn RiscPC 600 (OT - only 5 years old)

by pete＠dunnington.u-net.com

On May 11, 22:04, Pete Joules wrote: > Subject: Acorn RiscPC 600 (OT - only 5 years old) > Sorry for the post about a machine too young for the list but it is the > first of its kind in my collection. The chips seem to be from 1994 and the > RiscOS (v3) splash screen also says 1994. > > This machine came to me as a box only having been an insurance write off > because it jumped downstairs but there only seemms to superficial damage. > It boots OK but the mouse which appears to be necessary in order to use the > OS is missing and appears to have a proprietary connector. Can anyone tell > me either if the mice are available? It should be a 9-pin miniDIN, it's a proprietary mouse. The original one for a machine of that vintage was a badged Logitech OEM mouse, but any mouse that outputs raw quadrature signals (fours signals for X0,X1, Y0, Y1) and three buttons (left, middle, right) will do. CPC (http://www.cpc.co.uk/home.htm) sell Archimedes-compatible mice, as do several Acorn dealers. > Alternatively is it possible either to > persuade it to work with a serial mouse or to wire in a PS/2 socket in > place of the original one so that I can use a PS/2 mouse? HENSA have some software packages that allow you to use a serial mouse on the serial port (http://micros.hensa.ac.uk/platforms/riscos.html). You can't use a PS/2 mouse directly. > it seems to have 4M of RAM as 1 72 pin SIMM and 1 other memory board which > looks like a miniature DIMM. It also has a HDD with 59 Mb used and 159Mb > free so it must be about 220Mb altogether, this make windows look a bit > bloated as there appear to be some apps there as well - it also seems to > boot very fast compared with modern machines. Minimum sensible RAM is 4M, but it will hold up to 256MB, in 72-pin fast page mode SIMMs (it doesn't need parity, but parity SIMMs will work), 70ns or faster. The other memory board is dual-ported VRAM for faster video access. Not essential. > Does anyone know what processor it has and how fast it is? Originally, an Arm 610 on a daughter board. A 710 or 810 or StrongARM will also work. Many people bought upgrades when they came out, so you often see 610s or 710s for sale for ten quid or less. Or ask on one of the acorn newsgroups; they're common enough and cheap enough that people often din't bother to advertise them, and still have them lying around. There's a fairly good Acorn FAQ which you can get from the usual sources, and is posted to the Acorn newsgouops (comp.sys.acorn.*) regularly. You really don't want this machine. I suggest you parcel it up and send it to me :-) -- Pete Peter Turnbull Dept. of Computer Science University of York

27 years, 2 months

1
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HP 150 Touchscreen

by ethan_dicks＠yahoo.com

--- Tony Duell <ard(a)p850ug1.demon.co.uk> wrote: After I wrote... > > > > Hey. I've got one of those, just the IR hardware... > > > > Remember the entire CRT screen was visible through the hole in the middle > of the board. So the board itself is a lot bigger than the CRT. If what I've got is for a 9" CRT then I should be able to use it with a PET! -ethan _________________________________________________________ Do You Yahoo!? Free instant messaging and more at http://messenger.yahoo.com

27 years, 2 months

1
0
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Teac FD-55GFR 5.25" floppy drive

by edick＠idcomm.com

Careful with that grease! Vaseline is likely to make some plastic alloys soft, as it contains solvents for some of them. The clear grease most often used in lubricating plastic gears, bushings, etc, is called "lithium grease" and is available at most wholesale outlets which sell screws, nuts, bolts, etc. by the box. I have, by the way, found that a box of 100 of some of the more common screws found in electronics is a really worthwhile investment and saves money in the long run. This is especially true of metric sizes. Here in Denver, it's the rule rather than the exception that hardware and car parts stores sell both metric nuts and bolts, yet it's unusual to have bolts and nuts of the same size as marked on the blister pack actually fit. I don't know why this is, but it's a real pain in the gluteus maximus! I've never had this result at Fasteners Inc. I guess that's why I'd rather buy the small stuff by the box there rather than the handful at the hardware store. Dick -----Original Message----- From: Tony Duell <ard(a)p850ug1.demon.co.uk> To: Discussion re-collecting of classic computers <classiccmp(a)u.washington.edu> Date: Sunday, May 09, 1999 2:59 PM Subject: Re: Teac FD-55GFR 5.25" floppy drive >> >> Hi, >> >> On Fri, 7 May 1999 Tony Duell wrote: >> > Take off the spring. I believe that you can normally take the collet >> > apart further, but this isn't in the manual. Apply a smear of grease >> > (either plastic grease or vaseline) to the spindle and reassemble. Put >> > the spring on with the smaller end against the collet. >> >> Tried doing that, and it didn't help. It turns out that the C-clip was >> vibrating, causing the noise; I should probably have figured that out sooner. >> Putting some grease in the groove that the clip fits into solved the problem. I > >The C-clip should be a tight fit on the spindle. If it can move relative >to the spindle, then it's too loose. It might be worth taking it off and >either replacing it or squeezing it slightly. > >> guess using a hot-melt glue gun would do the job too. (Maybe this info will be > >I am strongly of the opinion that if something is assembled with glue >then it was designed incorrectly :-). And I would certainly never put >glue on something that I might want to take apart later. > >> of use to someone in future?) >> >> >> -- Mark >> >> > >-tony >

27 years, 2 months

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Dayton Hamvention

by ethan_dicks＠yahoo.com

--- Marvin <marvin(a)rain.org> wrote: > > I haven't heard anything about people going to Dayton except for Ethan. I should have my 2m rig with me... I don't know what freq the show is using for the public repeater, but I'm N8TVD. > ...how to get in touch with anyone there, but I will be speaking at the > ARDF forum Saturday morning... I can keep that in mind. I _won't_ be there Friday; I have to earn the money to buy the toys. -ethan _________________________________________________________ Do You Yahoo!? Free instant messaging and more at http://messenger.yahoo.com

27 years, 2 months

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WD Chip Info

by jeff.kaneko＠juno.com

Guys: I need someone to ID these WD devices for me. They don't appear in any of the docs that I have. WD10C20A WD2010B - This is the HDC chip, similar to the 1010. Does anyone have the actual datasheet for the 2010? WD1015 WD11C00 WD16C92 These chips have all appeared on AT controllers at one time or another. I'm trying to find out if they can be used for something a little more useful :^} ___________________________________________________________________ You don't need to buy Internet access to use free Internet e-mail. Get completely free e-mail from Juno at http://www.juno.com/getjuno.html or call Juno at (800) 654-JUNO [654-5866]

27 years, 2 months

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HP 150 Touchscreen

by ethan_dicks＠yahoo.com

--- Tony Duell <ard(a)p850ug1.demon.co.uk> wrote: ...long after I wrote... > > Hey. I've got one of those, just the IR hardware... > > Assuming it _is_ from an HP150 machine... Indeed. > The original version (fits a 9" CRT) used a 10-pin 2 row connector : > > 1 o o 6 > 2 o o 7 > 3 o o 8 > 4 o o 9 > 5 o o 10 That's the connector, but I think it fits a larger monitor than 9", unless there's lots of space around it for the IR hardware. Many thanks, -ethan _________________________________________________________ Do You Yahoo!? Free instant messaging and more at http://messenger.yahoo.com

27 years, 2 months

2
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Looking for Ron Ward

by ss＠allegro.com

Hi, Please pardon the bandwidth...I'm looking for a valid email address for "Ron Ward", possibly something @jps.net. I received email from him, and he sounded like someone who should be on ClassicCmp... but his "from" address (n6idlron(a)jps.net) is bad ("unknown user"), and support at jps.net says "no one in our database with such a name". thanks, Stan Sieler sieler(a)allegro.com

27 years, 2 months

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Power PC????

by rigdonj＠intellistar.net

Is anyone out there familar with the Motorola Power PCs? I spotted several today. A StarMax 4000/180, several that booted a said Power PC 604 and a Data Server 4000. Can anyone tell me more about these and what kind OS they run? Joe

27 years, 2 months

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Places in LA?

by dlw＠trailingedge.com

I'm going to be in LA Wed 5/12 til Sun 5/16 for E3. Don't know if I'll have time or much in the way of transportation, but is there any interesting places to look for classic computer stuff while I'm there? Silly me, of course there are, question is will any of you tell me where your secret fishing holes are? :-) ----- David Williams - Computer Packrat dlw(a)trailingedge.com http://www.trailingedge.com

27 years, 2 months

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Pictures from the final Paxton auction...

by jimw＠agora.rdrop.com

For those who are still curious, but not inclined to cut and paste the collections of URLs I offered previously... The images from the final Paxton auction have (finally) coalesced into a web page, accessible from the 'recent events and appearances' selection on the Computer Garage home page: http://www.computergarage.org -jim --- jimw(a)computergarage.org The Computer Garage - http://www.computergarage.org Computer Garage Fax - (503) 646-0174 >>> Coming soon to www.computergarage.org - the CBBS/NW on-line archives >>> Coming to VCF III (2-3 October 1999) - CBBS/NW live!

27 years, 2 months

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Commodore cassette format

by rcini＠email.msn.com

Here's a transcript of a converstation I had with Jim Butterfield about the Commodore cassette format: ==================== #: 42513 S2/Programming (CIS:CBMAPP) 31-Jul-97 17:49:07 Sb: CBM programming info Fm: Jim Butterfield 73624,14 To: Richard Cini/WUGNET 70153,3367 Replies: 0 TID: 8132 Par: 42485 Chd: 0 Sib: 0 > I seem to be missing some info on the following: info on the structure of > the tape header, and the equates for the "I/O Error#" messages (i.e., the > descriptions behind the error numbers). Can anyone point me in the right > direction on this? Hoo-eee! You picked a dilly of a complex format to look at (and some heavy code to read .. I swear that I could rewrite it into about half the ROM!). Probably the best place to start is on page 97 of the Inner Space Anthology. where there's some basic data by some guy called Butterfield: Leader = 50 cycles of Shorts Short = 182 microseconds half cycle or 2.75 Khz Long = 262 microseconds half cycle or 1.91 KHz Mark = 342 microseconds half cycle or 1.48 KHz BYTE MARKER = Mark Mark Long Long (What goes mark mark? A dog with a harelip. Oops, sorry, continuing..) 1-bit: Long Long Short Short 0-bit: Short Short Long Long Data Byte = Byte marker, 8 1/0 bits, 1 1/0 odd-parity bit' about 9.02 milliseconds total. Leader detail (I'm faking this one from memory); after the leader, there's a countdown byte series from about 0F hex to 00 hex; on the "second" block, the countdown is repeated with the high bit set, thus, 8F down to 80 hex. Tape File Format: Leader - header block - data block - possible end block. (All blocks written twice). Hope this gets you started. --Jim ================== #: 42554 S2/Programming (CIS:CBMAPP) 01-Aug-97 14:41:14 Sb: CBM programming info Fm: Jim Butterfield 73624,14 To: Richard Cini/WUGNET 70153,3367 Replies: 0 TID: 8132 Par: 42522 Chd: 0 Sib: 0 > I guess that the "countdown blocks" really are some sort of synchronization > before the header block? Yes. As I recall the code (it's been a while!), the reading program looks for this stream; when it finds an identifiable countdown byte, it just counts off the remaining characters until it gets to the data. It always seemed a bit like overkill to me. And when you get into the code itself, you'll find some quite obscure stuff in there trying to synchronize with the tape speed (a sort of self-correcting timing). Tough reading. > I'd like to get my hands on the "Inner Space Anthology" book. Can you help > there?? Karl Hildon, the compiler of the anthology, recently reprinted a quantity, with some C128 data added (the original anthology was published before the 128 arrived). I see his email address has been posted. Since Karl republished using a copying machine (including a colour copies for the cover), I believe he's asking about $20 for a copy. But check it out directly with him. If for any reason you can't find him, come back to me. --Jim ================== #: 42698 S2/Programming (CIS:CBMAPP) 08-Aug-97 12:07:27 Sb: CBM programming info Fm: Jim Butterfield 73624,14 To: Richard Cini/WUGNET 70153,3367 Replies: 0 TID: 8132 Par: 42665 Chd: 0 Sib: 0 > Am I doing the math wrong?? You have me at a couple of disadvantage. It's been something like 18 years since I picked apart the tape code, os it's nor fresh in my mind. To add to my difficulties, I have a vision problem at the moment which hopefully will be corrected by surgery in the fall ... but it makes it hard for me to do detailed picking through listings. Before I start sounding like I'm copping out, I will have some comments for you that may explain at least part of the discrepancy. But first, a couple more vague excuses: darned if I can remember where those timing numbers came from after all this time; seems likely that I filched them from a Commdore design spec, or someone measured them with a time base calibrated scope. I tend to doubt that I sweated through counting microseconds. And in this response, I should mention that my original investigations were on the PET 2001, my snoop today was on the C128 (built-in monitor makes exploring easier). And a caution to anyone with a Plus-4 or C-16 .. the code (and tape format) is not the same for those two machines. Here's the deal, I think: All this stuff is running off an IRQ. The "last" think the tape routine does is to set the timer ("last" is in quotes because there may be other IRQ jobs done after the tape work). BUT: after the timer is set, and the interrupt finally hits to signal that the time has elapsed, it will be quite a few microseconds before the tape routines will get to the point where they will set the timer again. First, the IRQ goes though the ROM routine which stashes the registers. Then, it does an indirect jump to the tape-write code; but it has to do quite a bit of investigation before it gets around to setting up the timer again. Even the timer routines you quote are within a subroutine, and of course it takes time to make the call, set up the numbers, etc. I might guess that the overhead taken to get to the "bit write" timer set could be in the region of 86 machine cycles. Thus, a timer value of $B0 or decimal 176 would actually generate a time of 176+86 machine cycles, or 262 cycles; a value of $60 or decimal 96 would produce 96+86 or 182 cycles. (Works out so exactly that, gosh, maybe long ago I did painstakingly count all the machine cycles .. if so, I've blissfully forgotten doing so). In looking at the code, you'll note that the byte marker is detected earlier in the interrupt sequence; I'll guess a delay or 70 (rather than 86) to get to that timer sequence. This would generate $110 or 272 o the timer producing an overall time of 272+70 or 342 machine cycles. Now, about the clock actually running at 1.1082 MHz. The original PET didn't have an interface to NTSC video, and the clock ran at precisely 1 MHz. So the calculation were correct during the ancient PET/CBM days; but it appears Commodore didn't see any need to trimthe figures by 10% when they changed the clock to match video frequencies. Never thought of that; but I expect that it's true that machines from the VIC-20 onward wrote tape about 9% faster than the earlier machines. I wonder if they made any adjustment for European machines, which likely had another clock frequency so as to be PAL compatible. Does the above sound like a plausible theory? --Jim p.s. The tape WRITE part is easy ... when you get to that read stuff, with multiple timers going, it's gonna be real fun. ================= [ Rich Cini/WUGNET [ ClubWin!/CW7 [ MCP Windows 95/Windows Networking [ Collector of "classic" computers [ http://highgate.comm.sfu.ca/~rcini/classiccmp/ [ http://highgate.comm.sfu.ca/~rcini/pdp11/ <---------------------------- reply separator

27 years, 2 months

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Commodore cassette format

by ds_spenc＠alcor.concordia.ca

Hi, I need some information about the Commodore cassette storage format. I want to salvage something from a damaged cassette, and I have a (rather crummy) audio digitizer. I've spent a couple of hours staring at the signals >from stored programs but I just don't 'get it'. In the data portions, it appears as if every 20th wave is special, with maximum amplitude and a smaller frequency. If these are synchronization points, why does it appear to be at every 20th wave? Why not every 9th? Does the format not care about bytes? Or is there some kind of error detection or correction scheme taking up more bits? There are about 200 of these 'synchronization waves' just in the header. The machine-readable file I was looking at only has a three-character filename. What data is normally stored in the header? Filename, load address, checksum or CRC, etc? It sounds like there are two identical copies of the header information. I know that there are two copies of the actual file data. How is the data actually stored? I expected to see square waves with frequency modulation. IIRC, that's what the Apple does. The PET appears to use sine waves (non-flattened) and I can't visually discern any frequency differences in the data (at a sample rate of approx. 25,500 per second). A lot of the data portion of the file I'm looking at looks like it is stored with amplitude modulation, but I don't think that would make sense with such a flaky thing as cassette tape. There are large amplitude "gulleys" here and there in the file, yet the file I'm looking at loads properly. (Of course, it sure SOUNDS like it's using frequency modulation. Perhaps I should sample at a higher rate, and get out a ruler to measure the width of the waves...) Those 20 waves don't represent a single bit, do they? (Lessee... approx. 60 waves per 600 samples, 25,500 samples per second... that's 2,550 Hz, and 20 waves/bit = 127.5 bps, which isn't enough but is getting somewhat closer to the numbers I'd expect. Maybe I'll answer some of my own questions with another look at the samples.) The damaged file that I want to salvage has had its header wiped out (someone momentarily hit "RECORD"), but the data appears to be untouched. Is there a way of getting the PET (or any other machine) to read the data without the file header? -- Doug Spence ds_spenc(a)alcor.concordia.ca http://alcor.concordia.ca/~ds_spenc/

27 years, 2 months

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Board Cleaning Opinions Wanted

by jeff.kaneko＠juno.com

Guys: If you had a pile of impossibly dirty DEC Q-Bus boards, what would you do? (This includes the usual disk controller card, CPU/IO/Memory extender, a couple of corestacks, the backplane, and the regulator card). Jeff ___________________________________________________________________ You don't need to buy Internet access to use free Internet e-mail. Get completely free e-mail from Juno at http://www.juno.com/getjuno.html or call Juno at (800) 654-JUNO [654-5866]

27 years, 2 months

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Kaypro 2x available

by jimw＠agora.rdrop.com

Another item seeking a home... Replies to original poster please... -jim ----------- >Date: Sun, 09 May 1999 09:36:04 -0500 >From: FRedFritz <frederick.fritz(a)mankato.msus.edu> >Reply-To: ffritz(a)mail.mankato.msus.edu >X-Sender: "FRedFritz" <ffritz(a)mail.mankato.msus.edu> (Unverified) >X-Mailer: Mozilla 4.06 [en]C-gatewaynet (Win98; I) >To: jimw(a)agora.rdrop.com >Subject: Kapro 2x available > >Dear Jim, > >I have a working Kapro 2x which I have just retired. I purchased it new >in 1985. It is in mint condition and I have all the software and >manuals that came with it. I would be delighted to find a "good home" >for it with someone who would appreciate it. Fred Fritz > >ffritz(a)mail.mankato.msus.edu --- jimw(a)computergarage.org The Computer Garage - http://www.computergarage.org Computer Garage Fax - (503) 646-0174

27 years, 2 months

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old PDPs in Australia

by jimw＠agora.rdrop.com

A non-text attachment was scrubbed... Name: not available Type: text/enriched Size: 3082 bytes Desc: not available Url : http://www.classiccmp.org/pipermail/cctalk/attachments/19990510/2a11399c/at…

27 years, 2 months

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GTS-100 Power Supply Info Needed

by dlw＠trailingedge.com

I have a Future Systems Inc. Model GTS-100 floppy drive for the Atari ST series computers but I don't have the manuals, cables or power supply. Does any one know specs on the power supply for this drive so I can locate a replacement. I think I once heard that it could use the same power supply as the Atari 5200 game system but don't know for sure. Also, if anyone has a source for cables or the strange 14 pin ST connector so I could make some cables, please let me know. Thanks. ----- David Williams - Computer Packrat dlw(a)trailingedge.com http://www.trailingedge.com

27 years, 2 months

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Board Cleaning Opinions Wanted

by danburrows＠mindspring.com

Other than the core stack the first thing I do is the 120 lb air hose. It cleans a lot of sins. At least lets you see what kind of mess you have. (what was used for glue) Then Isopropyl, methanol, or some window cleaner and a paint brush or soft well worn tooth brush and blasting it frequently with air. Use an old towel to wipe the paint brush on to clean it between strokes. Be sure to wear safety glasses. Alcohol in the eyes is no fun. Dan -----Original Message----- From: jeff.kaneko(a)juno.com <jeff.kaneko(a)juno.com> To: Discussion re-collecting of classic computers <classiccmp(a)u.washington.edu> Date: Monday, May 10, 1999 10:30 PM Subject: Board Cleaning Opinions Wanted >Guys: > >If you had a pile of impossibly dirty DEC Q-Bus boards, >what would you do? (This includes the usual disk controller card, >CPU/IO/Memory extender, a couple of corestacks, the backplane, >and the regulator card). > >Jeff > >___________________________________________________________________ >You don't need to buy Internet access to use free Internet e-mail. >Get completely free e-mail from Juno at http://www.juno.com/getjuno.html >or call Juno at (800) 654-JUNO [654-5866] >

27 years, 2 months

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Board Cleaning Opinions Wanted

by CLASSICCMP＠trailing-edge.com

>If you had a pile of impossibly dirty DEC Q-Bus boards, >what would you do? (This includes the usual disk controller card, >CPU/IO/Memory extender, a couple of corestacks, the backplane, >and the regulator card). For everything except the core stack, I wouldn't hesitate to run them through the dishwasher and gently dry. The core stack should be treated substantially more delicately. If you want to see "impossibly dirty", you ought to see some 11/23's that I was maintaining at a solar cell plant. Absolutely incredibly quantities of incredibly fine aluminum dust over everything - in some cases built up over a quarter inch thick - yet they kept on (for the most part) working. -- Tim Shoppa Email: shoppa(a)trailing-edge.com Trailing Edge Technology WWW: http://www.trailing-edge.com/ 7328 Bradley Blvd Voice: 301-767-5917 Bethesda, MD, USA 20817 Fax: 301-767-5927

27 years, 2 months

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Two quick questions, TK70 & DSSI

by cmcmanis＠freegate.com

1) Can a TK70 drive read/write TK50 tapes? I'm looking for media for the TK70 to test it and all I've found so far are TK50 tapes (or are they the same tape?) 2) What termination requirements are there on DSSI disks? I powered up the two RF71's and the KQSFA DSSI controller in the BA213, they spun up and the ready lights were on but when UNIX probed the controller it saw only one drive and when I tried to read that drive its FAULT light started flashing. The cabinet is set up to connect the card to a ribbon cable that connects both drives and then ends at a funky high density connector (looks a lot like SCSI-2). Thanks, --Chuck McManis

27 years, 2 months

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manuals available

by edick＠idcomm.com

That's right. In fact, I have the '81 data book on the floor right here. The ICM7228 is apparently an 8-digit LED display multiplexer which was not available in '81. I was hoping it was a different part, more like the CMOS 4534, which is a counter-display-driver. In any case, the information I got >from the Harris site and the Maxim site, per a referral from someone in this group, seems to correlate with my recollection, such as it is, of what these devices are. The 7226 is a 10 MHz frequency counter circuit with LED drivers built in. I once hooked up the part in a 9-digit application using a fast CMOS BCD counter as a prescaler rather than the ECL jewel they designed in their app-note. That makes it almost useful, as it then counts up to 100 MHz in several modes. Of course, you have to prescale both the inputs in order to make it work right, but it's a handy little tool if you package it right. That outrageously large board of Intersil's was pretty impractical except for the purpose for which it was intended, which was to demostrate how their porduct works. They didn't make it easy to up the count rate by a decade, nor did they make signal routing in and out very handy. The switches they used forced one to mount the board in a large box even though only a small area was needed for the display and switches. Their eval kit for the 7106 DPM was about as impractical. It got us to buy them, though, didn't it? Dick -----Original Message----- From: Joe <rigdonj(a)intellistar.net> To: Discussion re-collecting of classic computers <classiccmp(a)u.washington.edu> Date: Monday, May 10, 1999 3:02 PM Subject: Re: manuals available >Richard, > > I have a couple of old Intersil Evaluation kits and the manuals list all >of the devices available in 1981 but don't list a 7228. Are you sure it's >not a 7226? or else it's newer than 1981. > > Joe > >At 03:46 PM 5/8/99 -0600, you wrote: >>I've run into Intersil's ICM7228 once again and find my data book doesn't >>cover that number. It's date coded '87, so It's probably in the last book I >>got from Intersil before they were acquired by GE. >> >>Has anyone got a complete sheet on this part? I believe it is a >>multi-decade counter/display driver, or maybe just a display driver. >> >>thanx >> >>Dick >> >> >

27 years, 2 months

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HP 150 Touchscreen

by rigdonj＠intellistar.net

At 02:08 PM 5/10/99 -0700, you wrote: > > >--- Joe <rigdonj(a)intellistar.net> wrote: > >First, I wrote: >> >Hey. I've got one of those, just the IR hardware, not the CPU or monitor. >> >I picked it up at the Dayton Hamfest a couple of years ago because it looked >> >neat. > >> Sounds like you got one touch screen parts for the later TouchScreen II >> computer. It was an option on that computer and some terminals. It was >> built into the HP 150. > >Ah. Got it. > >> I THINK that all you have is a bezel with two rows of LED IR emitters >> and two rows of photo receptors. > >That's the one! > >> All you had to do to install it on the TS II was to pop out the old >> bezel, plug in the cable and snap this bezel in place. > >Are there any specs out there for the TS II that might be useful in attempting >to interface one to a different kind of computer? No, I don't think so. I think I have a service manual for the TS II but I don't think it gives any details about the touch screen. I expect that you would have to at least write a device driver before you could add it to another computer. Joe > >Thanks, > >-ethan > >_________________________________________________________ >Do You Yahoo!? >Get your free @yahoo.com address at http://mail.yahoo.com > >

27 years, 2 months

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replacement transformer wanted for IMSAI power supply

by edick＠idcomm.com

What are the physical dimensions of this transformer, Eric? I've been rooting around in that portion of the basement which has such things. Perhaps I have a potential drop-in replacement. I know I still have a couple of the transformmers from the ALTAIR, though I don't know which one. You may recall I bought a load of a couple of hundred back in the late '70's. I've got a number of different transformers that might serve. Dick -----Original Message----- From: Eric Smith <eric(a)brouhaha.com> To: Discussion re-collecting of classic computers <classiccmp(a)u.washington.edu> Date: Monday, May 10, 1999 2:14 AM Subject: Re: replacement transformer wanted for IMSAI power supply >Dave Dameron <ddameron(a)earthlink.net> replied about my IMSAI PSU woes: >> If the voltages checked out without a load, look for a very >> good short somewhere. > >The incoming AC was measured at 120.0 VAC. The primary has taps for >nominal, -10%, and +10% input. When I received it, it was apparently set >for -10%. I say apparently because the transformer doesn't match the one >in the IMSAI manual. The no-load DC voltages are expected to run high, but >these were even higher: 25V vs. 18V, 11V vs. 8V. I switched it to the +10% >tap, and now under some load (CPU, one memory card, front panel) the DC >voltages are very close to the nominal values. So I suppose this could be >indicative of shorted turns in the primary. > >> The 5 Amp line fuse didn't blow? > >Nope. But the transformer emitted a foul stench after a few minutes. It >wasn't hot enough to be painful to touch, but it was close.

27 years, 2 months

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manuals available

by edick＠idcomm.com

I've run into Intersil's ICM7228 once again and find my data book doesn't cover that number. It's date coded '87, so It's probably in the last book I got from Intersil before they were acquired by GE. Has anyone got a complete sheet on this part? I believe it is a multi-decade counter/display driver, or maybe just a display driver. thanx Dick

27 years, 2 months

2
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HP 150 Touchscreen

by ethan_dicks＠yahoo.com

--- ss(a)allegro.com wrote: > > Re: > > > I've been playing with a HP 150 recently. Do any of you physicists out > > there know how the touch screen works? > > Infrared beams...at least for the HP 150 A and B. > > The first two models had visible holes where dust could get in and obscure > the IR LEDs. Later, HP added an IR-transparent bezel over them to avoid > that problem. Hey. I've got one of those, just the IR hardware, not the CPU or monitor. I picked it up at the Dayton Hamfest a couple of years ago because it looked neat. Is there enough information out there to attempt to interface one of these units to another kind of computer? There is a ribbon cable with fifteen to twenty wires coming off of one side. -ethan _________________________________________________________ Do You Yahoo!? Get your free @yahoo.com address at http://mail.yahoo.com

27 years, 2 months

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HP 150 Touchscreen

by ethan_dicks＠yahoo.com

--- Joe <rigdonj(a)intellistar.net> wrote: First, I wrote: > >Hey. I've got one of those, just the IR hardware, not the CPU or monitor. > >I picked it up at the Dayton Hamfest a couple of years ago because it looked > >neat. > Sounds like you got one touch screen parts for the later TouchScreen II > computer. It was an option on that computer and some terminals. It was > built into the HP 150. Ah. Got it. > I THINK that all you have is a bezel with two rows of LED IR emitters > and two rows of photo receptors. That's the one! > All you had to do to install it on the TS II was to pop out the old > bezel, plug in the cable and snap this bezel in place. Are there any specs out there for the TS II that might be useful in attempting to interface one to a different kind of computer? Thanks, -ethan _________________________________________________________ Do You Yahoo!? Get your free @yahoo.com address at http://mail.yahoo.com

27 years, 2 months

1
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Interesting Ohio Scientific Information

by bill＠chipware.com

Thought those on the list that are interested in OSI might want to see this. From an OSI engineer who still wishes to remain anonymous: > Hi Bill, > I haven't forgot you, just got around to pulling box > out of storage. > The plastic cases are C1P Series 2. I ran across a > usage report dated 11/24/1980 that indicates we had > plastic shells in stock then. Those plus what we had > on order at that date was for about 1000 units. Average > weekly usage on the report was 28.5 units. I don't have > any more specific figures than that. I know we shipped > C1P Series 2 units, but I have no idea of the total. ... > If you're not aware of it, the C1P plastic cases were > simply top and bottom shells that attached to a C4P metal > case. The C4P case used the same metal, but had the walnut > sides. There were metal case C1Ps before that. From the > literature I have, it appears the metal case C1P shipped > <until> about August of 1978. An October 1, 1979 sales > information release still showed the metal cased C1P. ... > The same 11/24/1980 usage report shows 4 560ZB PC boards > in stock with none on order and average weekly usage zero. > My guess is that these are the remainder of a run of 5 or 10. > They are very rare. I believe I saw a board once. I never saw > one operating. I did not design it. The 560Z was a redesign > of the earlier 460Z that I don't think I ever saw. The 560Z > board ran the Z80 and Intersil 6100 micros. I have a 560Z > schematic dated August 1977 with status indicated as > "Production". The 460Z is in a March 1976 price list and > appears to only have supported the Intersil 6100. Both boards > require a OSI 6502 based CPU board as a host. I started at OSI > November 1977. The 560Z board appears to be the last board > designed before I became Chief Engineer. I ran across some > technical information that because of PDP8 unique IO micro > code, that you could not simply run PDP8 code on it.

27 years, 2 months

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B020 Transputer Graphics Board info

by Rmeenaks＠aol.com

Hey, The B020 that I have has two connectors on it. One, I am assuming is the 15-pin VGA connector. There is also another connector which looks like a 9-pin EGA connector. Is this correct? How do you connect the B020 to the B008 to make one network instead of two. I will be getting all the support software for the B020 soon. I know Tony has one, so I will be sending him a copy. Does anyone else want one? Also, apparently to use trams greater than size 1, I need jumper pins on the unused tram slots. Where can I get these?? Does anyone have several spares that they are not using???? Thanks. Ram

27 years, 2 months

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HP 150 Touchscreen

by jolminkh＠nsw.bigpond.net.au

I've been playing with a HP 150 recently. Do any of you physicists out there know how the touch screen works? The electronics for it surround the screen but don't seem to contact it. Some sort of static electricity capacitive effect on one's finger? I'm also having a lot of trouble making images of the disks that came with it. Teledisk doesn't seem to be able to handle the format. Any clues? Hans Olminkhof

27 years, 2 months

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HP keyboards

by rigdonj＠intellistar.net

One of the other list members asked me which HP keyboards he should pick up while surplus scrounging. That has started me on a long delayed project to make a list of HP keyboards and the system that they go to. I've started a list and posted it at "http://www.intellistar.net/~rigdonj/keyboard.txt". If anyone has any additional part numbers or comments please send them to me and I'll post them. Joe

27 years, 2 months

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