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

by dwightk.elvey＠amd.com

>From: "Sellam Ismail" <foo(a)siconic.com> >On Thu, 2 Jan 2003, Dwight K. Elvey wrote: > >> >On Thu, 2 Jan 2003, John Lawson wrote: >> > >> >> On Thu, 2 Jan 2003, Vintage Computer Festival wrote: >> >> >> >> > I've got the PICK CHECK signal from the reader going into CB2. I have >> a >> >> > 1K resistor going from CB2 to ground. >> >> ^^^^^^^^^^^ >> >> Try changing to 5K or even 10K (what I always use for pull ups/downs in >> >> TTL work. I think you're burying the poor PICK CHECK signal. Actually >> >> all the resistors oughta be 10K, IMHO. >> > >> >I'll certainly try that. But I'm wondering why that should be necessary >> >when the 6522 data sheet says that particular pin is a TTL level output. >> >> Hi >> I thought you were using the pin as an input. As an input, >> there is no pullup and a floating pin would not be good. > >The pin is an input, but it's normal state is to be off/false. Therefore, >John's suggestion to put a pulldown resistor on it seems logical. It >should be normally off, and the M200 should bring it high when it wants to >signal the PICK CHECK error. > >I'm trying to troubleshoot a more pressing problem right now: the reader >is picking 5 cards before the Apple thinks 80 Index Marks (e.g. 80 >characters) have been detected. Either my code is wrong, my code is slow, >or the Apple is too slow to handle the reader input (in which case this >was all for naught). Hi It sounds like something is wrong. Are you reading with BASIC or at code level. I would think that assembly code should be able to keep up, as long as you were not expecting it to transfer to disk while reading. Does the M200 have any kind of handshake? Dwight > >I'm heading off to Radio Shack to take a mental break and to get some >resistors and to see if they can offer me more than just blank stares. > >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, 4 months

6
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M200 interfacing continues...

by dwightk.elvey＠amd.com

>From: "Sellam Ismail" <foo(a)siconic.com> > >On Thu, 2 Jan 2003, John Lawson wrote: > >> On Thu, 2 Jan 2003, Vintage Computer Festival wrote: >> >> > I've got the PICK CHECK signal from the reader going into CB2. I have a >> > 1K resistor going from CB2 to ground. >> ^^^^^^^^^^^ >> Try changing to 5K or even 10K (what I always use for pull ups/downs in >> TTL work. I think you're burying the poor PICK CHECK signal. Actually >> all the resistors oughta be 10K, IMHO. > >I'll certainly try that. But I'm wondering why that should be necessary >when the 6522 data sheet says that particular pin is a TTL level output. Hi I thought you were using the pin as an input. As an input, there is no pullup and a floating pin would not be good. Dwight > >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, 4 months

3
2
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ATT 6300

by cellhell1＠hotmail.com

I have an ATT 6300 with 640 kb ram, msdos 3.30 keyboard and monitor in working condition. The keys need some prompting but a good cleaning will probably work. I will only sell as a set. jim

23 years, 4 months

1
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A couple of PS/2 items

by vance＠neurotica.com

Hi people. I'm looking for the chassis to a PS/2 Server 95. Not a 95XP, but a 95A. The one with the longer connector plate and two parallel ports. I'd prefer if it was somewhere in the northeastern U.S. The New York area would be optimal. If you want, you can have the PC Server 500 chassis from which I am borrowing the motherboard. Another thing is that I need the people who were interested in the PS/2 100Mbps ethernet cards to email me again. I now am able to send them out. $50+shipping apiece. The third thing is that I am looking for 8MB SIMM's for a PS/2 Model 95. They are the ECC kind. Fourth, I am getting rid of a lot of PS/2 SCSI cards, 286 RAM Expansion cards with RAM, and a couple of 386 RAM Expansion cards with RAM. I also have a couple of other weird MCA cards, so if there's anything in particular you're looking for, let me know. I do have a couple of IBM M-Motion Video Capture Adapter/A's *new in box*, if you're interested. That should be it. Peace... Sridhar

23 years, 4 months

1
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DEC 3000 300X/300

by runtime＠wzrd.com

Bradley: Pat's advice about using RJ11 with the tab cut off is workable, but it's probably better to use MMJ if you possibly can. MMJ connectors are easy to find, and DB25 - MMJ adaptors are also easy to find. Then, all that's needed is 6 conductor flat cable, also easy to find, and an MMJ crimper -- not very easy to find, and expensive. I can easily make up MMJ cable(s) for you if you need one or two. I can check my stock of DB25/MMJ adaptors, too. What gender DB25 is needed? (I don't have a 3000 to look at, to make sure.) email me off list -- we can get this one worked out. Don

23 years, 4 months

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Looking for small 32000 system

by jmkatcher＠yahoo.com

(Sorry if this is a repeat, but the original didn't appear on the list.) I've been looking for a Symmetric 375 (a rare beast) for sometime without luck and now I'd like to expand my search to other smaller 32000 machines (e.g. Tektronix 63xx/43xx and the lovely Whitechapel MG-1). Anyone looking for a good home for such a machine? Why 32000s? I just like to be different I guess. :) Best regards, Jeffrey Katcher jmkatcher(a)yahoo.com __________________________________________________ Do you Yahoo!? Yahoo! Mail Plus - Powerful. Affordable. Sign up now. http://mailplus.yahoo.com

23 years, 4 months

1
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ClassicCmp makes it to the big time

by foo＠siconic.com

An article from Reuters: New Appreciation for Old Computers http://www.reuters.com/newsArticle.jhtml;jsessionid=AS0NHSMHVCPNOCRBAEOCFEY… 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, 4 months

4
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M200 interfacing continues...

by dwightk.elvey＠amd.com

>From: "Sellam Ismail" <foo(a)siconic.com> > >On Fri, 3 Jan 2003, John Lawson wrote: > >> Bravo, Sellam! Really great work! Seems a simple modification to the >> program would allow it to read paper tape as well..... > >Actually, I was eyeing the pinouts of that paper tape reader that was >posted and was thinking, "Hey, I can build an interface for that" ;) > >Actually, my next task like this will probably be to get one of my paper >tape readers interface so I can start dumping all these paper tapes I have >from different systems. Hi Sellam You know I have a reader that I connect to a printer port on a PC? You can borrow that any time you want. Dwight > >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, 4 months

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[paul@vix.com: anybody want a vax 6400, sa600, tu81+?]

by jkunz＠unixag-kl.fh-kl.de

Hi. As this is a bit to big to ship across the "big pond"... Please contact Paul directly. ----- Forwarded message from Paul Vixie <paul(a)vix.com> ----- Delivered-To: port-vax(a)netbsd.org From: Paul Vixie <paul(a)vix.com> To: port-vax(a)netbsd.org Subject: anybody want a vax 6400, sa600, tu81+? X-Mailer: MH-E 7.0; nmh 1.0.4; Emacs 21.2 Date: Fri, 03 Jan 2003 03:36:15 +0000 Precedence: list this was matt thomas's but he left it at isc too long so i'm regifting it. anyone who can come to redwood city can have it. otherwise it has to go to the scrap yard. reply to me personally plz. ----- End forwarded message ----- -- tschüß, Jochen Homepage: http://www.unixag-kl.fh-kl.de/~jkunz

23 years, 4 months

1
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Epson manual needed

by rcini＠optonline.net

Hello, all: This is my first post for 2003 so I'd like to wish everyone a happy and healthy New Year. Over the vacation I dug out my Seiko/Epson 486 computer. It's a POS (point-of-sale) computer that I bought from Timeline two years ago and that I sometimes use for simple PC-based data collection projects. It's a really small 486-based machine with 32mb of RAM and a 10g laptop drive. Unfortunately, I can't find the manual now and Espon's Web site doesn't have it. It's model IM-403/IM-405 (mine is the 405 but the models are essentially the same). If anyone has this and can make a copy, I'd appreciate it. Thanks. Rich Cini Collector of classic computers Build Master for the Altair32 Emulation Project Web site: http://highgate.comm.sfu.ca/~rcini/classiccmp/ /************************************************************/

23 years, 4 months

1
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OT: Solaris 8 on TP 760EL

by dwoyciesjes＠comcast.net

Apologies, I know this isn't really ClassicCMP related, but I'm hopeful that some of the Solaris admins here can help me out... I installed Solaris 8 2/02 on my Thinkpad 760EL. I chose the deafault end-user collection, plus the freeware file compression utilities... Now, when I start it up, or reboot it, the GUI is fine. But when I only logout, though, I get a bunch of vertical lines across the screen. I also get the lines when I select "Remote Login" from the Option menu on the login screen. Seems like something to do with the display manager restarting. I downloaded and added the XF86 packages from Sun (which included 2 patches), but those drivers were no help. I even found and tried a different .xqa driver description. No go. Anybody have any ideas? Feel free to respond to me directly... -- ---Dave Woyciesjes ---ICQ# 905818

23 years, 4 months

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Rescuers in Peoria, IL area?

by DSEAGRAV＠toad.xkl.com

Most of the remains of my collection will become available in the next couple days. Known to be up for grabs here is a PDP-11/44 with a blown PSU (but otherwise working), a PDP-11/34A of unknown configuration, miscellaneous DEC paraphernalia, some MicroVAX stuff, and miscellaneous old modem equipment. Basically, I was thrown out of home some time ago, and left a lot of stuff behind as I had nowhere to take it. My mom is sick of waiting for me to take care of the remaining gear and wants it out, now. I have 3 weeks to move it or it goes to the dump. I have nowhere to take it and no foreseeable future for any of it in my possession. For some twisted reason I am taking the KS10 with me - I guess I don't quite want to admit that my career is over. I don't know how I'm getting it here but I'll push it if I have to, dammit. If nobody is in the area to save anything, I can salvage what I can and scrap the remainder. I'll have to visit the garage in the next couple days to see what exactly is left. I can't afford to ship anything anywhere. If you want something and I have it you have to come to Peoria, IL and get it. All of the boards I had have already been destroyed, as was most of the documentation and paperwork. If I don't get a response by the 10th I will assume nobody is available. Hopefully someone else can get a better run with this stuff than I could. -------

23 years, 4 months

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Fw: [rescue] Fwd: anybody want a vax 6400, sa600, tu81+?

by rschaefe＠gcfn.org

----- Original Message ----- From: "Dave McGuire" <mcguire(a)neurotica.com> To: <rescue(a)sunhelp.org> Sent: Thursday, January 02, 2003 11:09 PM Subject: [rescue] Fwd: anybody want a vax 6400, sa600, tu81+? > Someone *please* rescue this. I'd do it myself but I have no way to > get it to this coast. Contact Paul directly. What he said! > > -Dave > > Begin forwarded message: > > From: Paul Vixie <paul(a)vix.com> > > Date: Thu Jan 2, 2003 10:36:15 PM US/Eastern > > To: port-vax(a)netbsd.org > > Subject: anybody want a vax 6400, sa600, tu81+? > > > > this was matt thomas's but he left it at isc too long so i'm regifting > > it. > > > > anyone who can come to redwood city can have it. > > > > otherwise it has to go to the scrap yard. > > > > reply to me personally plz. > > > > > > -- > Dave McGuire "She's a cheek pincher. I have scars." > St. Petersburg, FL -Gary Nichols > _______________________________________________ > rescue list - http://www.sunhelp.org/mailman/listinfo/rescue

23 years, 4 months

1
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Model III TRSDOS directories

by tim＠tim-mann.org

In case Sellam or others are still looking for info, I happened to find a pretty good summary of the Model III TRSDOS directory details on Ira Goldklang's www.trs-80.com site. See http://www.trs-80.com/trs80-pd.htm#mod3dir. -- Tim Mann tim(a)tim-mann.org http://www.tim-mann.org/

23 years, 4 months

2
1
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This Old Scope

by rhudson＠cnonline.net

Hi, In the San Jose, CA area... I have a tektronix type 310A o'scope that needs some help in the horz. sweep area. I am not well versed in the art of component level repair. What can I do to get this guy back up and running? Thanks for your help! Ron.

23 years, 4 months

1
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PDP11/73 power-up codes

by david_comley＠yahoo.com

I'm sure this is a familiar question to many - does anyone have a list of the two-digit codes displayed on the PDP11-73 during power-up ? I am resurrecting a dormant unit which stops at '1' (I have only the CPU and memory installed in the backplane) I'm not sure if this is a good or a bad code. Any help would be appreciated. Thanks, David Comley __________________________________________________ Do you Yahoo!? Yahoo! Mail Plus - Powerful. Affordable. Sign up now. http://mailplus.yahoo.com

23 years, 4 months

1
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Two great Finds Today

by jrkeys＠concentric.net

A friend stopped me in the parking lot of an auction today and gave me a box full of computer stuff and in it was a TI-74 BASICALC with a carrying case and 8k RAM module in it. Also it came with a Quick Reference Card for Basic Syntax. At the auction I got something called "The Brick" by Ergo computing Inc.. It's a cool looking 386SX-16 as per this article from a google search: "The Ergo Brick, a 3" x 8" x 11" totable PC, was billed as the "cure for the common computer." With a keyboard and monitor at home, another at work, it gave desktop power in a portable package. Today you could fit three PowerBook G4/500s in almost the same amount of space as the $2,495 16 MHz 386sx-based Brick.". I got the CPU, power supply, manual, and a carrying case. The keyboard was missing.

23 years, 4 months

2
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Two great Finds Today

by healyzh＠aracnet.com

> At the auction I got something called "The Brick" by Ergo computing Inc.. > It's a cool looking 386SX-16 as per this article from a google search: "The > Ergo Brick, a 3" x 8" x 11" totable PC, was billed as the "cure for the > common computer." With a keyboard and monitor at home, another at work, it > gave desktop power in a portable package. Today you could fit three > PowerBook G4/500s in almost the same amount of space as the $2,495 16 MHz > 386sx-based Brick.". I got the CPU, power supply, manual, and a carrying > case. The keyboard was missing. Hey, that's pretty cool. I remember drooling over adds for those around 1990! If you look through issues of "PC Magazine" from about that timeframe you should be able to find the adds. Of course I didn't remember it being so big... Didn't they give it a greyish bricklike finish? Zane

23 years, 4 months

2
1
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DEC TU-56 & TD8E

by cmcnabb＠4mcnabb.net

I believe I now have my TU-56 and TD8E working. When I mount a tape and attempt to boot my one OS/8 tape it loads to the point of printing "SYSTEM ERR" on the teletype. I strongly suspect that the tape is probably corrupt. I'm wondering if there is anyone out there who would be willing to copy any kind of Bootable PDP-8/E tape for me so I can test with a known good tape. I would be more than willing to provide a couple of tapes for the copy. -- Christopher L McNabb Operating Systems Analyst Email: cmcnabb(a)4mcnabb.net Virginia Tech ICBM: 37.1356N 80.4272N GMRS: WPSR255 ARS: N2UX Grid Sq: EM97SD

23 years, 4 months

1
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M200 interfacing continues...

by dwightk.elvey＠amd.com

>From: "Sellam Ismail" <foo(a)siconic.com> > >On Thu, 2 Jan 2003, Tony Duell wrote: > >> > The main problem I'm having is reading the control lines of the 6522. >> > According to the spec sheet, CB1, CB2 and CA2 are all supposed to be TTL >> > level outputs when programmed for such. So they are, but I'm having >> >> Do you mean output or input here? If you're reading a pin, then I would >> have assumed you were using it as an input. > >Sorry for confusing the hell out of anyone. I meant input. From the 6522 >datasheet: > >"CA1 is a high impedance input, while CA2 represents one standard TTL load >in the input mode." > >...and regarding CB1 and CB2... > >"Each control line represents one standard TTL load in the input mode and >can drive one TTL load in the output mode." > >> Try a pull-up instead (TTL sinks a lot better than it sources). In other >> words change the end of the resistor from ground to +5V >> >> make this +5V >> | >> V >> > READER SIGNAL----+----/\/\/\-------GND >> > | >> > | >> > 6522 CB2 > >Wouldn't this give me a default state of logical true on the input pin? Hi For a TTL, one normally has an open pin set to one. One pulls it to zero to be active. Ever notice that all of the strobes and such for things like parallel ports on a PC are always negative. For those pins that you are using as inputs, make sure that you've set the direction register correctly. Dwight > >> If you still have problems, then maybe the driver chip in the M200 has >> died. It happens. I've had a couple of HP9810 calculators across my bench >> where there were 10 or so dead TTL chips (74Hxxx TTL chips especially) >> that appeared to work, but which couldn't give a proper output signal, >> so the chip it was connected to didn't always get the right logic level. > >Well, it works, just not all the time. So from what John has told me, it >seems like the signal is just being lost half the time. > >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, 4 months

1
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M200 interfacing continues...

by vcf＠siconic.com

Ok, I'm almost there. I've got everything wired up and most of the driver software done. The main problem I'm having is reading the control lines of the 6522. According to the spec sheet, CB1, CB2 and CA2 are all supposed to be TTL level outputs when programmed for such. So they are, but I'm having trouble reading CB2 reliably. I put a pull-down resistor on it but that doesn't help. The signal to it is spotty for some reason. I've got the PICK CHECK signal from the reader going into CB2. I have a 1K resistor going from CB2 to ground. READER SIGNAL----+----/\/\/\-------GND | | 6522 CB2 If there's an error (misfeed for instance) CB2 should get a logical TRUE. This works sometimes, but not always. And it's the same whether I have the pull-down resistor or not. I'm using CB1 reliable without the need of a pull-down resistor. I don't know if it's sloppy code or a bug, but the Apple doesn't seem fast enough to read and process the data character by character. I would think that it should be fast enough to do so but I'll have to check the timing on the loop and see if it falls within the specs of each column read from the reader. For now I've switched to buffering the data and then processing it after each card read, controlling the picker with the software to control the flow of cards. I'm figuring out the code for the last piece which decodes the row pin into a decimal number. What's the best way to do an nth root operation in 6502 assembly? :) Crummy way: LDY #00 LOOP INY LSR BCC LOOP This assumes only 1 bit is set in the accumulator. It loops until the bit falls off from the LSR operation. Assuming the accumulator has #80 to begin with, the Y-register result should be 8. -- 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, 4 months

6
10
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Oersted Ratings of DC300A and DC600 Tape Cartridges

by aek＠spies.com

http://www.qic.org/html/standards/9x.x/qic95-101e.pdf dc300 dc300xlp 310 Oe dc600A 550 Oe I have a curve in an early wangtek manual about this, too.

23 years, 4 months

2
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PDP9 Control Store on eBay

by jpl15＠panix.com

Browsing along, found this: http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=1247&item=2085798445 Listed (and pictured) as a MC09 (G920D) card. Hex-height, four green tabs. The description says it's 64 words of 36 bits each, Read Only. Minimum bid: $30.00. No buy-it-now. Cheerz John

23 years, 4 months

2
1
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Compaq 286/SLT (was RE: Anyone have any experience replacing a Dallas 1287 with a 12887?)

by Robert_Feldman＠jdedwards.com

According to the Guide, the p/n's should either be 110091-011 and 110092-011 (for ROM Revision H.6) or 110091-0012 and 110092-012 ( for Revision H.7). Bob -----Original Message----- From: Ethan Dicks [mailto:erd_6502@yahoo.com] Sent: Thursday, January 02, 2003 10:09 AM To: cctalk(a)classiccmp.org Subject: Compaq 286/SLT (was RE: Anyone have any experience replacing a Dallas 1287 with a 12887?) <snip> My ROMs have stickers with p/n 110091-011 and 110091-012, (c) 1988. -ethan

23 years, 4 months

2
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Z8000-Fan

by dwightk.elvey＠amd.com

Hi David It may not be as hard as you'd think. First, you don't have to cross compile CPM-8000. There already is a CPM-8000. Recently, source and release code was found for this and, working with Chris Groessle, we've managed to bring it up on our Olivetti M20's. This code was originally written for the M20, as it was the only major machine sold with a Z8000 ( there were a few SBC's out there ). The release comes with a C compiler and an assembler. There is source code for the BIOS as well. It does depend on the M20 ROM code for low level access. This CPM was mostly written by a combination of Zilog and DR people. It is mostly written in C with a minimum written in assembly. There are a few issues. Even though the manual says you can get by with only 128K, this would be difficult. Several of the utilities require two 64K chunks ( one for instruction and one for data ). It would be best if the other system functions had there own piece of RAM to work in. One needs to map the memory such that you can access a single 64K as both instruction and data as well as the 128K as 64k instruction and 64k data. The bad news is that we don't have the complete source for the CPM. The BIOS does require that it be compiled on a running CPM-8000. As the documents state, it would be difficult to build it on some other system. Still if someone is willing to write a BIOS for their board, I'd be willing to compile the code for them on my machine. Dwight >From: "Kane, David (DPRS)" <David.Kane(a)aph.gov.au> > >Hi, > >I always wanted to play with this processor, I just never got the chance. I have a copy of the Zilog "Microcomputer Components - Data Book Feb 1980" and a copy of "Programming the Z8000" (a Sybec book), but that is about as far as I ever got. I was tinkering with the thought of modding the SIMH emulator to include a Z8000 system, but I don't have any details or experience of any real systems. I then though to invent a fictitious S100 system, based on the existing Altair emulation, but with a Z8000 CPU. This could most likely run a CPM8000 system, with the appropriate BDOS changes. But a lot of work would be need to get a set of compilers/cross compilers for the Z8000, either in tracking them down or writing them. I saw recently that BDS C has been put into the public domain with full source, so there might be some avenue there. Still to generate CPM (or MPM) for a fictitious machine would be a mammoth undertaking, I have all the source code needed, just not the compilers. It would require an 8080/Z80 to Z8000 cross assembler (to avoid rewriting all the assembler), a Z8000 PLM compiler, and a Z8000 C compiler. > >Anyway I am declaring myself an unfulfilled fan of the Z8000 processor family. > >David Kane > >-----Original Message----- >From: G?nter Mewes [mailto:info@mewesbus.de] >Sent: Saturday, 28 December 2002 12:49 AM >To: cctech(a)classiccmp.org >Subject: Z8000-Fan > >Hi Mr. Johnston, >today I was looking for some Z8000 Fans, to talk about experieces ... >Are you interested ? > >Please, be so kind and send a mail. > >Guenter Mewes (www.guentermewes.de)

23 years, 4 months

1
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VAX-11/780 spotted in a movie

by mcguire＠neurotica.com

A friend and I just watched the movie "Seven". I'd seen the movie before, but I hadn't noticed the VAX-11/780 in the background of the computerized fingerprint matching scene. It's obviously not running (no roar in the background) but it was definitely a '780. :-) -Dave -- Dave McGuire "She's a cheek pincher. I have scars." St. Petersburg, FL -Gary Nichols

23 years, 4 months

2
2
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Cromemco

by rob_gr＠yahoo.com

Mike, When I get a chance I will try to dig out information on the Cromemco, 64KZ memory board. Can not promise I will find anything as we are looking at 15 years. Bob __________________________________________________ Do you Yahoo!? Yahoo! Mail Plus - Powerful. Affordable. Sign up now. http://mailplus.yahoo.com

23 years, 4 months

2
1
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Oersted Ratings of DC300A and DC600 Tape Cartridges

by aek＠spies.com

an interesting history of the 1/4" tape format can be found here: http://www.cybergenetic.ca/ebook/wrh13.htm

23 years, 4 months

2
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Computers for sale

by JRBrown＠DVECCJAX.med.navy.mil

I have a Kaypro III, 2 Osborne I's and 1 IBM laptop. All three are 10-15 years old and all but 1 of the Osborne's run fine. I would like to sell them but don't know how to go about it. Could you offer some advice. I will be inventorying the software this evening and will be able to answer detail questions tomorrow. I appreciate your assistance. James R. Brown Jrb2000(a)bellsouth.net <mailto:Jrb2000@bellsouth.net> or jrbrown(a)dveccjax.med.navy.mil <mailto:jrbrown@dveccjax.med.navy.mil> Phone after PM is 904-269-3984; cell 904-813-8452

23 years, 4 months

1
0
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Scripsit for TRS-80 Model 4; bug in program

by bobh＠wolv.tds.net

Did anyone here use Scripsit on the TRS-80 Model 4 and have the problem of long documents getting all garbled? That was a wonderful memory that I had of the "Good Old Days".

23 years, 4 months

1
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Vintage Computer

by mail＠auctionessentials4u.com

Ernest, I was an Engineer at Apple in the late 70's. I have an original Apple II that I put together as my lab bench computer. It has a proto-type Language Card that I designed.( I also have hand written design notes for the board and a second proto card) The system also contains a proto-type Disk controller boot card and 16 sector Disk. I also have a proto-type hand soldered proto-type parallel port that I designed and licensed to Apple. My library contains a ton of software much of which was used as in-house design tools, some with documentation. The system works. Have you any idea how much this may be worth and the best channels to sell it? BTW: I live in Woodinville WA and I believe you are in Seattle. Check out my Bio at: http://www.ipages4u.com/Bio.htm Robert Paratore paratore(a)ipages4u.com 206-353-6666 http://www.ipages4u.com

23 years, 4 months

1
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Sharp PC7000

by formated＠juno.com

The Sharp PC7000 has a nice light blue display with different backlight settings...Dim, Standard, and Bright. A contrast wheel helps fine tune the view. On bright the text is clear and readable.

23 years, 4 months

1
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Power Supply for IBM Aptiva

by rtuttle＠earthlink.net

Robert F. Schaefer: [power supply, FRU 06H2973, P/N 06H2971 has 3.3V, and an extra connector, keyed 3 pin with a latch, 22GA black, white, & red] Do you still have this available? I use my old Aptiva A40 as my network server here at home. The power supply has been failing for a while but as long as you don?t bump it, it seems to work OK. However, Christmas must have done it in. I need a new one. Will be glad to get yours if still available. Thanks, Rick Tuttle Milwaukee

23 years, 4 months

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Anyone have any experience replacing a Dallas 1287 with a 128 87?

by Robert_Feldman＠jdedwards.com

There are 3 memory expansion slots. When filled with 4MB modules, the max RAM is 12.6MB. Three hard drives were offered: two 20MB (type 2) and one 40MB (type 22). The difference between the 20MBs was the interleave of 1:1 vs 3:1. The Compaq Service Quick Reference Guide (1992) lists 13 different ROM revisions, from F.2 to K.1 -----Original Message----- From: Ethan Dicks [mailto:erd_6502@yahoo.com] Sent: Wednesday, January 01, 2003 4:51 PM To: cctalk(a)classiccmp.org Subject: Re: Anyone have any experience replacing a Dallas 1287 with a 12887? --- Tothwolf <tothwolf(a)concentric.net> wrote: > Years ago I used to maintain some of these systems... > The memory modules are located center-front of the "laptop", under a > metal shield/cover. Yep. Found those. Full of SRAM, not DRAM, astonishingly enough. > I don't remember how many slots exist, but I think it can > hold 3, maybe 4 modules. Modules were available in 1MB and 4MB sizes. Three. I have three 1MB modules. Didn't know there were 4MB modules. I'm sure I'll never run across any. For DOS usage, 3.6MB is OK. This one has Windows 3.0 on it, but I don't need it for what I'm doing. > The hard drive is a 3.5" form factor IDE drive. Usually, these systems > had a 20MB or 40MB drive, but it would have been possible to upgrade > it to 120-210MB too... Mine has the bog-standard 40MB Connor drive (type 22). Would love to find a set of replacement ROMs for this so I could use oddball drives, but for now, I'm stuck with what I've got. -ethan <snip>

23 years, 4 months

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substitute for TI TIL306/307 Display?

by rigdonj＠cfl.rr.com

Toth, At 10:51 PM 12/31/02 -0600, you wrote: >On Tue, 31 Dec 2002, Joe wrote: > >> Does anyone know of another display that can be substituted for the TIL >> 306/307? Here is a data sheet for the 306/307 in case you have a >> question about it, <www.alltronics.com/download/TIL306.pdf>. > >I don't know of an exact replacement offhand, but I thought these were >still in production? Are they? I think mine are about 25 years old. FWIW I went looking for some at a large local surplus store and found one that I think is prototype. It's built out of clear material instead of red and is marked TIXL306 and is date coded 7204 (almost 31 years old!). I went through several boxs and THOUSANDs of displays and only found one standard 306 and the one prototype. How many of these displays are you looking for? I >believe I still have a few in my parts bin... In addition to the one that I found in the store I need three of them. Mine were in sockets and the dissimilar metal corrosion has eaten off at least one leg off of each of mine. Joe > >-Toth >

23 years, 4 months

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Anyone have any experience replacing a Dallas 1287 with a 12887?

by erd_6502＠yahoo.com

While attempting to revive a Compaq 286/SLT laptop for use as a front-end for my UP600a programmer, I have found that the battery on the DS1287 has died (no suprise there). What sucks is that even after I run the floppy-based setup utility, after a reboot (not a power-off cycle), the machine forgets what I just set, both the data and time, and the geometry of the A: drive. Seeing as how it thinks there's a 5.25" floppy and it's really a 3.5" high-density drive at the end of the cable, as you can imagine, it won't reliably read disks. So... I have ordered a replacement DS12887 since they no longer make/ship the DS1287. Couple of interesting app notes here: http://www.maxim-ic.com/appnotes.cfm/appnote_number/562 http://www.maxim-ic.com/quick_view2.cfm/qv_pk/2681 What I'm wondering is if anyone on the list has ever replaced a DS1287 with a DS12887. One of the sheets seems to suggest that I'll need an updated BIOS ROM (clearly not available for a 286 laptop) to drive the extra stuff associated with the enhanced century rollover. Alternatively, has anyone here successfully performed surgery on a Dallas module? I have disconnected the battery from a Mostek 48T02 from a SPARC and soldered on an external Lithium cell, but the packaging makes it easy to get access to the battery wires coming down from the top (I even put the battery on a 9V battery snap so it's easier to replace) I haven't heard of anyone doing this for the more sealed Dallas modules. So... anybody else suffer though this? -ethan __________________________________________________ Do you Yahoo!? Yahoo! Mail Plus - Powerful. Affordable. Sign up now. http://mailplus.yahoo.com

23 years, 4 months

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Z8000-Fan

by David.Kane＠aph.gov.au

Hi, I always wanted to play with this processor, I just never got the chance. I have a copy of the Zilog "Microcomputer Components - Data Book Feb 1980" and a copy of "Programming the Z8000" (a Sybec book), but that is about as far as I ever got. I was tinkering with the thought of modding the SIMH emulator to include a Z8000 system, but I don't have any details or experience of any real systems. I then though to invent a fictitious S100 system, based on the existing Altair emulation, but with a Z8000 CPU. This could most likely run a CPM8000 system, with the appropriate BDOS changes. But a lot of work would be need to get a set of compilers/cross compilers for the Z8000, either in tracking them down or writing them. I saw recently that BDS C has been put into the public domain with full source, so there might be some avenue there. Still to generate CPM (or MPM) for a fictitious machine would be a mammoth undertaking, I have all the source code needed, just not the compilers. It would require an 8080/Z80 to Z8000 cross assembler (to avoid rewriting all the assembler), a Z8000 PLM compiler, and a Z8000 C compiler. Anyway I am declaring myself an unfulfilled fan of the Z8000 processor family. David Kane -----Original Message----- From: G?nter Mewes [mailto:info@mewesbus.de] Sent: Saturday, 28 December 2002 12:49 AM To: cctech(a)classiccmp.org Subject: Z8000-Fan Hi Mr. Johnston, today I was looking for some Z8000 Fans, to talk about experieces ... Are you interested ? Please, be so kind and send a mail. Guenter Mewes (www.guentermewes.de)

23 years, 4 months

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IBM PCjr needs a new home

by vcf＠siconic.com

Reply directly to: <patriots1959(a)yahoo.com> ---------- Forwarded message ---------- Date: Wed, 1 Jan 2003 14:58:34 -0800 (PST) From: Jason <patriots1959(a)yahoo.com> To: donate(a)vintage.org Subject: IBM PCjr Hello! I have a working 1980 IBM PCjr, with 51/4 Floppies of software. If you are interested please reply Thank you, Jason -- 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, 4 months

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Floppy disk media density/format mismatching

by ian_primus＠yahoo.com

I was hunting around on ebay, and I found this quite by accident. http://cgi.ebay.com/ws/ eBayISAPI.dll?ViewItem&category=4610&item=2085201851 It is an auction for some reproduction Apple Lisa system disks. The guy certainly did a good job copying the labels, but I really wonder about the data on them - the disks he used are high density floppies. I always thought that if you format a high density floppy for low density that it will work for a while, then the data will become corrupt due to the different magnetic properties of the media. I know that this is true on 5 1/4 media, I used a high density disk in a Commodore 64 by mistake once, and it didn't work very well. I also remember back when high density 3 1/2" floppies were pretty expensive, I used to buy low density disks and drill holes in the other corner so I could reformat them for high density. It worked just fine, and those disks still work. Can anyone shed any light on the subject? Ian Primus ian_primus(a)yahoo.com

23 years, 4 months

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WWII fire control 'computers'

by mranalog＠attbi.com

Jules Richardson asks: > Does anyone know anything about the mechanical fire control computers as used > in second world war for UK coastal defence batteries? Do you know who the manufacturer was? I have started web pages for Ford Instrument, and Arma Corporation. And I have some information on them. I also received this email just last Sunday from David Mindell, Associate Professor of the History of Engineering and Manufacturing at MIT: > ....... You might be interested in my new book, > Between Human and Machine: Feedback, Control, and > Computing before Cybernetics (Johns Hopkins, 2002). > It has a lot of heretofore unkown history of analog > computing, including the Ford Instrument Company, > Sperry, Arma, naval fire control, early Bell Labs > analog electrical computers ("operational amplifiers,") > Philbrick, etc. Even a Librascope computer, not unlike > the one on your page, incorporated into the Mark 56 > radar-controlled gun director. I have not had a chance to see a copy of this book yet. But you might look for a copy of this book, or email the author at mindell at mit dot edu and ask him. --Doug ========================================= Doug Coward @ home in Poulsbo, WA Analog Computer Online Museum and History Center http://dcoward.best.vwh.net/analog =========================================

23 years, 4 months

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Hi!/ Sharing the technology/ LK401/ Thanks!

by pete＠dunnington.u-net.com

On Dec 31, 13:03, Justin wrote: > > Oops. Sounds like you have an LK450, LK461 or LK471, not an LK401. LK401 > > uses a DEC protocol, the others are PS/2-style keyboards. They're not > > interchangeable, I'm afraid. There should be a label on the underside, > > with three barcodes, the top barcode being the model number. Does it say > > LK401, or something a little different? > > You are the only one to say it speaks DEC and not ps/2 though it has a > ps/2 connector. The circuitboard looks like that of a LK201 when I take > it apart. They all look fairly similar. What I meant is that the ones with PS/2-style plugs normally use PS/2 protocol, and the ones with an RJ11 use a different, proprietary protocol. My PS/2 ones are at work so I can't easily check. The only ones I have here are RJ11 LK401s, from VT420s. > It does have 3 barcodes on the bottom. It isn't made by DEC but in > Mexico by someone My LK401s, one UK layout, one German, both say Made in Mexico but they're still DEC. > But it ways 5.0 VDC, so I guess it must be ps/2 and not dec style since > dec has 12 vdc? Sorry, I can't remember. -- Pete Peter Turnbull Network Manager University of York

23 years, 4 months

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Apollo Guidance Computer was Re: WWII fire control 'computers'

by mranalog＠attbi.com

While trying to find more information about the book "Between Human and Machine: Feedback, Control, and Computing before Cybernetics" that I mentioned earlier, I came across a streaming video clip (little over an hour long) of professor Mindell discussing his book: http://web.mit.edu/mitworld/content/authors/mindell.html click on "View->>" A very interesting listen. Towards the end of the clip he mentions that his next project will involve the evolution of virtual environments starting with flight simulators in the 1930, through Apollo, to the internet today. I also noticed during my search that he is the point of contact about the Apollo Guidance Computer for the "History of Recent Science & Technology" web site at MIT - http://hrst.mit.edu/ Anyway, since some people here have been asking for more information on the AGC, I thought I would mention that the "History of Recent Science & Technology" web site has a great library of PDF documents on the AGC at http://hrst.mit.edu/groups/apollo/bibliography/q-and-a.tcl?topic_id=11&topi… I glanced through some of the files. Many of them are quite large. The first file, "Apollo Guidance and Navigation Lunar Module Student Study Guide" seems to be a very detailed manual on the workings of the computer, including a list of machine instructions. "Demonstration of the AGC" is a video clip of the computer being operated. "Astronauts' Guidance and Navigation Course Notes" is a introduction to functioning of the whole Apollo Guidance and Navigation System. And the file "Luminary 131" (which is a 637MB 1742 page PDF file that took me 2 hours to download at 90kps!!!) is entitled "Apollo Luminary 131 (1C) Program Source Code Listing "19 Dec 1969 NOTE: This listing contains the flight program for the Lunar Module as created by MIT's Draper Lab for the Apollo 13/14 moon missions" And many many more.. --Doug ========================================= Doug Coward @ home in Poulsbo, WA Analog Computer Online Museum and History Center http://dcoward.best.vwh.net/analog =========================================

23 years, 4 months

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Floppy disk media density/format mismatching

by cb＠mythtech.net

>I >always thought that if you format a high density floppy for low density >that it will work for a while, then the data will become corrupt due to >the different magnetic properties of the media. In my experience this is true. A long while back, at work we had a client that kept sending us boxes of blank HD 3.5 disks for use on PCs. We never needed them (sent all the data va modem), and some at my office kept taking them and formatting them as 800k in our Macs (SE's and Pluses at the time). None of them lasted more than a few weeks and a few dozen read/writes. They generated read/write errors fairly quickly, and always ended up loosing data. Some wouldn't even take a format. I can't imagine them being much better for a 400k disk (which was really a single sided 800k disk as far as Apple was concerned... but don't be fooled into thinking a 400k disk is safe to format as 800k... I have many many disks that went bad doing that as well... I can only assume that only one side of the media was tested as good in manufacturing). I had even worse experiences with punching a hole in a DD 3.5 disk and formatting for 1.44 (I even have one of those hole punchers sold for just this purpose). I think of the bunch that I tried (I think it was a pack of 25), only something like 5 even took the format, and those 5 failed almost on their first use... that was a total disaster of an experiment (I bought the puncher and a pack of disks specifically to avoid the higher HD cost... it was after this failure that I looked up info on the disks and learned WHY this wouldn't work, then I was amazed at the fact that a company sold a punch tool for it... but like PT Barnum says...) -chris <http://www.mythtech.net>

23 years, 4 months

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Free Wang PC in MD

by owad＠applefritter.com

This Wang sounds like it's been well taken care of. Email Bob <james917(a)earthlink.net>. Bob's original messages (with HTML stripped): ---------- I have a top of the line Wang computer complete with keyboard, monitor, and daisywheel printer. I have numerous wheels and about a dozen tapes for the printer. Our local authorities have scheduled a pickup for obsolete and unwanted electronic and computer equipment on 13 January 2003. My wife insists I get rid of 'all' unused electronic gear, and I hate to see my Wang in a landfill. Do you know anyone who would want it? If so, please forward this message. I'm located in Salisbury, MD, and my e-mail address is <james917(a)earthlink.net>. ---------- Happy New Year, Tom. Re my Wang: I do not find a model number but Wang's literature calls it a Professional Computer. It was made in 1986 and bears a serial no. PG3397. Its dimensions are: 26x16x5 inches. The printer 's dimensions are 22x16x5. It is primarily a word processing device, and Wang's Integrated Word Processing reference guide calls it version 2.5. Other literature (Installation guide) refers to PC 300/33C series. The computer is NOT IBM compatible. I have lots of descriptive literature and instruction manuals. Further, If anyone is interested in getting this computer and associated equipment, and realizing Salisbury is in a somewhat remote area, I would be willing to meet with a prospective owner in Easton, MD., or, depending on weather, at one end of the Bay bridge. Further than that I'm unwilling to drive. I'm going on 87 years of age, and not as adventure-some as I was several years ago. I hope you can find someone who wants this device. I had lots of fun with it, and I certainly don't want to see it end up in a land-fill. Once more, Have a good 2003. Sincerely, Bob ----------

23 years, 4 months

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A better new year

by lgwalker＠mts.net

For a better new year, all that has to be done is make pretzels a couple of centimeters thicker. Most all the world will be delighted. A war-free year to all. Lawrence May you get halfway to heaven, before Satan learns you're dead or 3/4s of the way to the bar before your wife finds you've gone out. lgwalker(a)mts.net bigwalk_ca(a)yahoo.com

23 years, 4 months

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substitute for TI TIL306/307 Display?

by rigdonj＠cfl.rr.com

Does anyone know of another display that can be substituted for the TIL 306/307? Here is a data sheet for the 306/307 in case you have a question about it, <www.alltronics.com/download/TIL306.pdf>. Joe

23 years, 4 months

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Section 9? (HP 1000 power supply)

by glenslick＠hotmail.com

That is good information to know. I never had a plug to look at and check the resister inside. I think I was told 880 ohms, but that doesn't appear to be a standard resister value while 820 ohms is a standard value. Now that I know the real value to use I will build a real plug instead of just using some test clips and a trimpot for now. -Glen >Here I sit looking at a little black square 3x3 plug, HP p/n >12991-60002 (stamped in white ink on one side of the hood). > >Inside the hood (visible through the hole in the back) there is only a >1/4W resistor connected to pins 4 and 6, which matches Glen's >description. Bands are gray, red, brown, gold. Hmm, 820 ohms? >Measures as 823 ohms on my cheap digital multimeter. > >-Frank McConnell _________________________________________________________________ Protect your PC - get McAfee.com VirusScan Online http://clinic.mcafee.com/clinic/ibuy/campaign.asp?cid=3963

23 years, 4 months

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Section 9? (HP 1000 power supply)

by fmc＠reanimators.org

"Glen S" <glenslick(a)hotmail.com> wrote: > But someone else on the list told me that something like an 880ohm resister > across the left most and right most terminals of the middle row of the > battery connector input would trigger the power supply to power up all of > the way. That did the trick for the HP 1000 / 2117F that I have. Here I sit looking at a little black square 3x3 plug, HP p/n 12991-60002 (stamped in white ink on one side of the hood). Inside the hood (visible through the hole in the back) there is only a 1/4W resistor connected to pins 4 and 6, which matches Glen's description. Bands are gray, red, brown, gold. Hmm, 820 ohms? Measures as 823 ohms on my cheap digital multimeter. -Frank McConnell

23 years, 4 months

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Section 9?

by jimw＠agora.rdrop.com

Ok, a tad cryptic. <G> I've found the .pdf version of the HP 1000/M/E/F Engineering Docs, but every copy I've been able to access is missing section 9 (still can't keep track of the Roman Numerals they mark the sections with) which covers the power supply. There seems something a tad 'twinky' with mine, tho I seem to recall at one point someone had directed me to a jumper/resistor that needed to be installed at the 'Battery Input' connector on the rear to wake something up, but of course now that I'm working on it I can't find anything... Help??? -jim --- jimw(a)agora.rdrop.com The Computer Garage - http://www.rdrop.com/~jimw

23 years, 4 months

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Anyone have any experience replacing a Dallas 1287 with a 12887?

by dwightk.elvey＠amd.com

>From: "Ethan Dicks" <erd_6502(a)yahoo.com> > > >While attempting to revive a Compaq 286/SLT laptop for use as a >front-end for my UP600a programmer, I have found that the battery >on the DS1287 has died (no suprise there). What sucks is that >even after I run the floppy-based setup utility, after a reboot >(not a power-off cycle), the machine forgets what I just set, >both the data and time, and the geometry of the A: drive. Seeing >as how it thinks there's a 5.25" floppy and it's really a 3.5" >high-density drive at the end of the cable, as you can imagine, >it won't reliably read disks. > >So... I have ordered a replacement DS12887 since they no longer make/ship >the DS1287. Couple of interesting app notes here: > > http://www.maxim-ic.com/appnotes.cfm/appnote_number/562 > http://www.maxim-ic.com/quick_view2.cfm/qv_pk/2681 > >What I'm wondering is if anyone on the list has ever replaced a DS1287 >with a DS12887. One of the sheets seems to suggest that I'll need >an updated BIOS ROM (clearly not available for a 286 laptop) to drive >the extra stuff associated with the enhanced century rollover. > >Alternatively, has anyone here successfully performed surgery on a Dallas >module? I have disconnected the battery from a Mostek 48T02 from a SPARC >and soldered on an external Lithium cell, but the packaging makes it easy >to get access to the battery wires coming down from the top (I even put >the battery on a 9V battery snap so it's easier to replace) I haven't >heard of anyone doing this for the more sealed Dallas modules. > >So... anybody else suffer though this? > >-ethan > > Hi In a search of the news groups, I found an article by a fellow that had done surgery on a number of different modules. One thing that seemed to be constant was that they put the battery in a number of different locations within these types of devices. If I was going to hack mine, I first take it to a printed circuit building shop. These guys usually have a small X-ray machine for inspecting solder joints. With one of these, you can locate where the vital parts of the chip are. You can then use a Dremel to grind into it and connect an external 3V cell. Dwight

23 years, 4 months

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