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

by altair8800＠hotmail.com

> >I was looking at the Altair kit on E-OverPay. The owner says that his kit >didn't come with the Altair label. I also have an Altair that was build >from a kit. Mine didn't come with the label either. Anybody know why? > > Joe My kit did not have a label with it when shipped either. I have corresponded with others who tell me their's came sans label too. One speculated that it is the early ones which were sent out without labels. Don't know why. Bob Wood ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com

27 years, 3 months

3
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datapoint 1800 (1980 )

by maurice.hamm＠wxs.nl

First I am Maurice Hamm 30 years old and living in the Netherlands. I have a privite collection of old Radio's, Tv's and computers. The datapoint 1800, a dec pdp 11/23, a zx81, a commodore 64, a IBM 8086 etc. What has happend. I have reorgenized my collection room and got the craziesed idea to start up my DATAPOINT 1800 computer. (1980 ) This was my first computer and had for several years lot of fun with it. I am industrious seeking for somebody that knows something about this machine or has some information or docs I got the machine in 1988 and has worked for several years whith it. But now after several years I start up the machine and it did not start up, the screen keeps black !! There is power in the machine, the disks spins and the picture tube is glowing. There is also no response of the keyboard. I think the ROM is emty. There is no self test. I know for certain that it was in a working state the last time I had used the machine +/- 7 years ago. I opened the case to look for bad fuses or contacts but every thing looks ok. What has gone wrong? Question: I know its a long time and a very, very old machine But I just like to see this machine working again. The comp. works under DOS.G I have several programes and documentation and a wheel printer attached to this comp.. Please help me. Greatings, and a Happy new Year, Maurice Hamm

27 years, 3 months

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Really off-topic but who cares on this one!

by rhblake＠bigfoot.com

You have GOT to see this page! It will sure as heck lighten up your day, especially if you're looking at the ice collect on the phone and power lines like I am..... http://viperspit.com/funny.html Check the "dancing baby" page out as well, very funny. And now back to our regularly scheduled mailing list....

27 years, 3 months

1
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seeking docs for Qantel systems hardware

by museum＠techniche.com

Hi, I've got a Qantel model 10 system sitting around the house. My wife used to (I guess she still does occasionally) program on it. Qantel was a hardware manufacturer out of Hayward Ca. They went out of business (sort of) around 1987/88. I say 'sort of' because I think Mohawk Data Systems bought the support rights. I also think that someone may have attempted recently to relaunch parts of their product line. Anyway this system isdefinitely 10 years old. I'd like to see what hardware documentation might be floating around out there for this. In particular I have a real nice High-speed line printer that I would like to get service and interface info on. It was manufacture by Teletype but I haven't been able to find a model number on it and I didn't want to disassemble it right now. It is currently still working fine, but I'd like to connect it to some other equipment. From the little I've examine it, it appears that it might be a current loop interface (the era is right for this also). Anyone familiar with this printer? Thanks, Jon

27 years, 3 months

2
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Ohio Scientific floppy progress

by bill＠chipware.com

> > So I built the PC to 8 inch floppy converter and > > got the software working (see other message). > > I have tested four of the six drives I have and... > > THEY ALL WORK! > > Not only that, but they all agree with each other. > > That is, a disk formatted and written on one drive > > will read on any other drive. > > > > Can I assume that this means they are all > > What you've done is called an 'interchangeablity test' in the manuals. It > doesn't mean all the drives are correctly aligned, or even that they're all > aligned exactly the same. It does mean, though that they're all pretty close. > It's possible that they're all way off, but I doubt it. After all, how would > they have all been aligned to each other? > > So I think it's safe to say that they're probably aligned well enough to use. Now I'm 6 for 6. All six work, all pass interchangeability. For those keeping score: 3 Seimens model FDD 200-8P 1 Seimens model FDD 120-8 1 Seimens model FDD 100-8 1 Shugart model 801 (missing one cap) Now to go through and jiggle all of the boards in the C3-D, power it up and see if she boots. Wish me luck.

27 years, 3 months

1
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Possibly OT, Memory testing

by wpe101＠banet.net

Can anyone point me to a good utility for testing memory that DOS 6.22 (HIMEM) occaisionally reports as suspect? I'm looking for something other than yanking the SIMM's out, and testing them (it's a govt owned 'puter, and the repair person 'll take forever if I don't provide some kind of serious guidance as to the cause of the problem).. Yeah, I've thought of opening it up, and cleaning the contacts on the SIMMS etc, but, as a Contractor Employee, I don't want to risk getting my company getting blamed for anything.. AdvTHANKSance Will

27 years, 3 months

1
0
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IBM XT

by radack＠juno.com

I have an IBM XT with monitor & keyboard. Anyone interested? ___________________________________________________________________ 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, 3 months

1
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Altair kit on E-OverPay

by rigdonj＠intellistar.net

I was looking at the Altair kit on E-OverPay. The owner says that his kit didn't come with the Altair label. I also have an Altair that was build >from a kit. Mine didn't come with the label either. Anybody know why? Joe

27 years, 3 months

1
0
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That does not compute

by SUPRDAVE＠aol.com

In a message dated 12/31/98 9:42:11 PM EST, adavie(a)mad.scientist.com writes: << I wonder if there are other examples of ins/outs that you oldies remember and would care to share. Things that were ubiquitous and no longer with us. >> how about BBSs? they are still around, but with the net catching on and everyone getting on it, bulletin boards are all but forgotten it seems.

27 years, 3 months

4
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Apple 1

by amc358＠interserv.com

> On Thursday, December 31, 1998 7:49 PM, Andrew Davie wrote: > A gent I've just traded with to obtain a boxed SYM-1 casually What version of SYM is it? I have a SYM that is a slightly later one, 1.1? It's not the one that took a 680x chip (version 2?), but the one after the VIM. I'm looking for a manual, or at least a photocopy of the schematics. Someone from Australia sent me an old SYM manual set, but it was for the earlier VIM. He also sent along the BASIC and RAE (assembler) proms. I'm keeping the BASIC, but would be willing to trade the RAE for a SYM manual. Al McCann amc358(a)interserv.com

27 years, 3 months

1
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FSOT: WANG WLTC "Transportable" laptop

by roblwill＠usaor.net

Hello. I have a WANG WLTC computer that I would like to either sell for a reasonable price, or trade for another laptop/portable computer (preferably classic). Here are the specs: -8086 (8MHz?) -10MB internal HD -WANG compatible LCD (can emulate CGA or Hercules) -Built-in thermal printer w/plain-paper capability (ribbon available) -512K RAM -50-pin Centronics SCSI port for floppy drive, external HD, etc. This computer supposedly has an in-ROM wordprocessor and spreadsheet, but I have yet to figure out how to get into them. I have a not-so-good battery for it, so it will occasionally not boot (sort of like the Mac Portable - must have a charged battery to run correctly). The internal P/S has a small problem in that it will occasionally blow a cap. I think this is either caused by the bad battery or because some of the other electrolytics are starting to go bad (I have no way of testing them). It requires an 18vDC, 1.5 amp external P/S, which I don't have. The person that I previously had a deal with seems to have backed out again, so I'm offering it to the first person that responds with a reasonable offer. I have two WLTC's , and I don't like to have more than one of a single type of computer, so I'm offering it here, where someone would would possibly be able to fix/use it. I'd say that it's a fairly durable computer, since my other one has nearly (a guess) 27,000 hours on the HD, with no bad sectors, it still ran fine, even after it was dropped, until the external P/S got zapped last year. Now I run it off of three 6v Power Wheels batteries. If anyone is interested, or wants a picture of it, send me a personal email, and I can send you one (about 40k). -- -Jason Willgruber (roblwill(a)usaor.net) ICQ#: 1730318 <http://members.tripod.com/general_1> PS>> If anyone has any spare WLTC power bricks, and you want to sell one, let me know. -ThAnX!

27 years, 3 months

1
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Glass capacitors that look like diodes

by allisonp＠world.std.com

<The "glass capacitors" that look like diodes look that way because they = <ARE diodes. It turns out that one of the cheapest and best ways to make = <0.1uF capacitors is to make two diodes in the same case, in series with = This is inaccurate. The size of the junction needed to create a .1uF cap would be huge. It would not be cheap nor effective. The cap inside is similar in construction to those now seen on SMT loaded cards. It is possible to make caps using the junction and there are devices that use this principle. However the capacitance is A) variable with voltage imposed across the reverse biased junction and B) 300-500pf is about the upper limit for them. They are known as varactor or varicap diodes and are not found on SA8XX drives. The glass caps were generally just a different package with one advantage in that glass is hermetic. Or better said compared to plastics and some ceramics they are impervious to moisture. Allison

27 years, 3 months

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Glass capacitors that look like diodes

by Watzman＠ibm.net

The "glass capacitors" that look like diodes look that way because they ARE diodes. It turns out that one of the cheapest and best ways to make 0.1uF capacitors is to make two diodes in the same case, in series with opposite polarities (it never conducts because one of the diodes is always back biased). The back-biased junction forms the capacitor, and it has very good characteristics for bypass (decoupling). As for the 104 notation, this is 10**4 (ten to the 4th power). Thats 10,000 pF = 0.1 uF. 50V is the voltage rating. Barry Watzman

27 years, 3 months

2
1
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Shugart Model 801 (8 inch floppy)

by pete＠dunnington.u-net.com

On Jan 1, 0:08, Tony Duell wrote: > Yes.. 104 -> 10*10^4 pf (read the numbers like the bands on a resistor, > but in pf) = 0.1uF. The Z is the tolerance, I think. 50V is the maximum > working voltage. Yes, the letter is the tolerance, as defined in IEC 63(1963) (and possibly elsewhere). J=5% K=10% M=20% and Z means "something else" or "not very good" or "unclassified", often +20% -80%. -- Pete Peter Turnbull Dept. of Computer Science University of York

27 years, 3 months

2
1
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Another DOS source for internet software

by rhblake＠bigfoot.com

Mr "TV Dog" is back up and around with his MSDOS/Tandy 1000 realm and has posted a page of general purpose software for internet use on older non-windows machines at http://www.agate.net/~tvdog/internet.html Just in case you wanted to know <g>

27 years, 3 months

1
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SYM-1 single board computer

by allisonp＠world.std.com

<The AIM-65 (single-board, full keyboard, LED display and 20-column <printer on-board), SD Systems Z-80 starter kit, Motorola MEK6800, VIM-1 <(predecessor to the SYM-1). What about the Intel SDK80, SDK85, SDK88, NEC TK80, the AMI EVKseries and the IMSAI IMP48? Allison

27 years, 3 months

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SYM-1 single board computer

by allisonp＠world.std.com

<I am fortunate to have recentlyly added a SYM-1 to my collection. <Could anybody with instructions/documentation for this machine please <contact me. I'd like to explore the possibility of purchase or trade of <these documents, or copies. I now have the KIM and SYM - would anybody car <to suggest another target to aim for? ie: What other single board computer AS a collector you should study records of the time (magazines and the like) for your targets. IT would give you a better idea of the significance and the relationships of thse items. FYI: AIM-65 would be one to looks for. Allison

27 years, 3 months

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That does not compute

by pete＠dunnington.u-net.com

On Dec 31, 20:01, Sam Ismail wrote: > AppleSoft didn't have a PRINT @ statement so chalk that one up to my > arrogant ignorance. Interestingly though, Woz squeezed the '@' symbol > on to the original Apple ][ keyboard above the P key (shift-P = @). Who > knows why. The @ wasn't used for anything inherent in the Apple. It follows teletype usage, I think; CTRL-SHIFT-@ = CTRL-@ = NUL Probably Woz had a use for 'NUL' rather than '@'. w.r.t. "PRINT @", several BASICs (but not Applesoft) had "PRINT AT" instead. -- Pete Peter Turnbull Dept. of Computer Science University of York

27 years, 3 months

2
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SYM-1 single board computer

by dogas＠leading.net

>The AIM-65 (single-board, full keyboard, LED display and 20-column >printer on-board), SD Systems Z-80 starter kit, Motorola MEK6800, VIM-1 >(predecessor to the SYM-1). > I have a full doc set for the AIM-65 if anyone needs any info on this machine. Happy new year all! - Mike: dogas(a)leading.net

27 years, 3 months

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SYM-1 single board computer

by dogas＠leading.net

>> to suggest another target to aim for? ie: What other single board computers >> from the era, with on-board keypads, would be fitting companions for the SYM >> and KIM? > >The AIM-65 (single-board, full keyboard, LED display and 20-column >printer on-board), SD Systems Z-80 starter kit, Motorola MEK6800, VIM-1 >(predecessor to the SYM-1). > >There are many more, but you only wanted those with on-board keypads. > A few more keypad systems immediately come to mind.. Heathkit ET3400: 680x based HP5036A: 8085 based IMSAI 8048 controllers: - Mike: dogas(a)leading.net

27 years, 3 months

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Tri-Data Memory Boards

by neil＠goodnet.com

Hi, I have some old memory boards that use the EMM SEMI 4200 Chip (the same as the Altair 16K Static RAM 16-MCS Board uses). They have TRI-DATA etched into the copper. They also have "MCI 1" in white silk screen on the card. They have a strange configuration: 6 Bit colum X 4 Bit row. They also have an EPROM on board. Does any one know where they came from, what they are used for and if they are worth anything. If they are worth something, I would be willing to exchange them for a fair price. If they aren't worth anything, I'll just scrap them and sell the memory for use with an Altair. At any rate, if anyone knows anything about them, I would appreciate knowing about them. Thanks, Neil.

27 years, 3 months

1
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That does not compute

by pete＠dunnington.u-net.com

On Dec 31, 20:07, Zane H. Healy wrote: > As for the function keys, until recently I think the only thing I'd ever > used them for was WordPerfect. Now I use them all the time on VT420's, and > wish I knew how to set them on a RS/6000. They would probably be used a > LOT more if people knew how, or if there was some nice UNIX/Mac/Windoz Apps > for setting them to do stuff (of course there probably is, but I can't > think of any). I use them a lot too, partly because on my Unix box there's a little utility called 'bindkey' to assign arbitrary strings to keys. It works for any keys, but generally I find it more useful to assign command strings to function keys, and I'm used to programming strings into function keys on other micros (BBC Micro, Archimedes, mostly). The insert() and string(string) functions in xterm should allow you to program your function keys, but it's a bit tedious by hand, I expect. -- Pete Peter Turnbull Dept. of Computer Science University of York

27 years, 3 months

1
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what is this? motorola alphamate

by sinasohn＠ricochet.net

At 10:38 PM 12/22/98 -0600, you wrote: > size keyboard and a 3x40 line lcd display. machine also has connections for > rs232, telephone, and din plugs for modem and printer. machine can also run >I tried to buy a lot of those once. I thought they were portable >terminals, but they turn out to be "portable paging entry terminals" used >to send pages to pagers, I assume.

27 years, 3 months

2
1
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Shugart Model 801 (8 inch floppy)

by bill＠chipware.com

> From: Tony Duell <ard(a)p850ug1.demon.co.uk> > 25229 : This also has the 40 pin ASIC but with a totally different > layout. C1 is a 0.1uF cap Near the power connector. CR1 is a 1N4148 a few > components back from the middle of the front edge. There are 2 zeners, > CR8 (12V) near the head connector and CR18 (2.4V) about halfway between > the front edge of the board and pin 1 of the 40 pin chip That's the one! I suck at ASCII art so lets try text. Looking at the board component side towards me, 50 pin edge connector up. In the upper right corner is a tin can cap aligned veritically, silk screen seems to be "C26". To its left is the power connector. Below it, aligned horizontally, is a clear component with bright copper ends and fine black print which (straining my eyes) seems to read: 104 Z 50V The silkscreen that seems to be associated with it is "C25". Directly below that is where the missing component was, also aligned horizontally. The silkscreen that seems to be associated with that position is "C1". The leads that remianed had the same bright copper ends still attached. There were bits of curshed clear material stuck to the board.

27 years, 3 months

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what is this? motorola alphamate

by SUPRDAVE＠aol.com

In a message dated 12/31/98 10:14:47 PM EST, sinasohn(a)ricochet.net writes: << > size keyboard and a 3x40 line lcd display. machine also has connections for > rs232, telephone, and din plugs for modem and printer. machine can also run >I tried to buy a lot of those once. I thought they were portable >terminals, but they turn out to be "portable paging entry terminals" used >to send pages to pagers, I assume. >From my research into alphapaging standards (I was working on a program for the RS m100 to use it as an alphapaging station) I believe that is exactly what it is. A tech from airtouch recommended I just buy one of those instead of writing my own program. (Probably shoulda listened; the pgm isn't done yet.) >> well, if anyone wants this alphamate, just let me know. i dont want it.

27 years, 3 months

1
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RT-11 Crashes During UNLOAD

by jhfine＠idirect.com

Before I go into the detail, let me first say that this bug likely is as old as V5.5 (I only have looked at the V5.6 code on a friend's system) which is when extended device drivers were first introduced. So, we can say that the bug is about 10 years old and qualifies for this list since V5.5 of RT-11 was released in 1989. The bug in RT-11 occurs when RT-11 has had a SYSGEN to allow extended device drivers and a device driver which is extended (allows more than 8 devices - in my case, I was using a DU: MSCP device driver which allowed 64 partitions). In a test case, the following sequence produces a crash: SRUN KEX.SAV/LEVEL:n/NAME:KEXn for n = 1 => 6 after each do a CTRL/B to return to the background Then do: ABORT KEXn for n = 1 => 6 UNLOAD KEXn for n = 1 => 6 I tried this under RT11XM on V5.6 with an RL02 being the boot device and DU: being auto-installed and not referenced the whole time. In the actual situation, DU: was being referenced on a magneto optical disk drive to obtain specified files, but the DU: device driver was not LOADed since there was insufficient space left in low memory. So, although there are probably a number of work arounds, the real problem is that UNLOAD has a bug and does not work correctly in these circumstances. UNLOAD in KMOVLY has a bug, as far as I can understand. In fact, possibly more than one. But, for now, just one that I can handle. It would seem, in addition, that co-ordination between different portions of the monitor may not have been done very successfully since the USR does have the correct code to handle the situation (a "Beq" instruction) while UNLOAD seems to want to ignore the problem. Of course, if the USR had not handled the problem correctly, there are likely going to be many more occasions when the bug would have occurred, so in the USR it was caught and the code is correct. The exact description of the bug and owner tables may not be correct. If so, please refer to the SSM. But the essential nature of the bug is, I believe, correctly described. THE PROBLEM, from what I can understand, is that in UNLOAD, a system job MAY "own" a specific device (done via a LOAD command). There is a two word owner table entry for each device which has 4 bits allowed for each of the possible 8 drives normally associated (DU0: => DU7:) with each device driver. When a SYSGEN is done which includes extended device drivers, that owner table entry of two words is too small and is used to "point" to a 16 word (maximum size) table within the device driver ONLY when the device driver is LOADed (I presume that a .FETCH may also allocate the same 16 words, but they would not be used). SO IF THE DEVICE DRIVER IS INSTALLed, BUT NOT LOADed, the two word owner table entry can't "point" anywhere and the pointer word is set at a default of zero. In the USR, when that word is picked up, a "Beq" is used to detect that the device driver has not yet been LOADed and no owner specific code is executed. BUT, UNLOAD in KMOVLY does not have that instruction ("Beq") and merrily goes and assumes that the extended device driver owner table entry (in the case of an extended device driver SYSGENed system PLUS an actual extended device driver such as DU:) is at the location starting at zero. In the process of disconnecting the system job from a device driver, the first 16 words in low memory are assumed to contain the owner table entry AND the 8 vectors there (00 => 34 - which obviously includes the EMT vector) can be "MODIFIED". Which results in crashes in RT-11. If anyone is truly interested in this bug, but does not understand what I have stated - the explanation I have given is only a small portion of all the detail, please inquire further. Since this bug has not been encountered before - or if anyone has but was unable to track it down - then likely the situation does not occur very often. When DU: is resident, obviously DU: has been LOADed. But I suspect that an extended LD: which is not LOADed could also cause the same problem. The simple solution that I was told about a number of years ago (when I had not yet been informed that it was UNLOAD which was causing the problem) is to not do the UNLOAD, but to instead do a BOOT which, of course, does an UNLOAD of everything. Sincerely yours, Jerome Fine

27 years, 3 months

1
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Win95 in running very slowly shocker!

by gareth.knight2＠which.net

Tim Hotze wrote: >I agree here, too. Windows 95 really won't like a 486/20. Sure, in >theory, it SHOULD boot, but your lifetime warranty on RAM might >expire before you get to see a Start button. Win95 OSR1 runs fine on my 486 33MHz. Well, good enough to run the occasional game of multi-player Doom at any rate. Now if only I could work out how it managed to upgrade itself from an SX to a DX whilst I was installing Win95 ;)

27 years, 3 months

2
1
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vaugue musings...

by netcafe＠pirie.mtx.net.au

-----Original Message----- From: Hans Franke <Hans.Franke(a)mch20.sbs.de> To: Discussion re-collecting of classic computers <classiccmp(a)u.washington.edu> Date: Friday, 25 December 1998 2:20 Subject: Re: vaugue musings... > >> Merry Christmas All >> It's after 7:30pm Xmas Eve, and it's 36C. >> Seeya > >If it wasn't for Christmas, I'll hate you for teasing us >with this ridicoulus temperatures while we have -3C :) Want to swap? I HATE summer. My shop is not airconditioned and I can't take computers apart while I'm dripping on to the boards. I really like cold weather. Mind you, it never gets below 0C here, except maybe a couple below during the mid winter nights. >Anyway, Fr?hliche Weihnacht to all of you. And to you all. It's 9pm on Christmas Day, we had a cool southerly change, and the temp is now a very comfortable 22C or so. But it's still 30+ in the shop. Gonna have to get some exhaust fans or an evaporative cooler at least...... We had Xmas Dinner outside around the BBQ, but it was a bit warm even there. Cheers Geoff Roberts Computer Room Internet Cafe Port Pirie South Australia. netcafe(a)pirie.mtx.net.au

27 years, 3 months

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Ohio Scientific floppy progress

by bill＠chipware.com

So I built the PC to 8 inch floppy converter and got the software working (see other message). I have tested four of the six drives I have and... THEY ALL WORK! Not only that, but they all agree with each other. That is, a disk formatted and written on one drive will read on any other drive. Can I assume that this means they are all properly aligned? I find this hard to believe as two of the drives were mishandled during shipping so badly that they sheared off their mounting bolts and a few of the components on one of the electronics boards were damaged (more in next message). Finally, where is write protection enforced? There is a signal from the drive to the controller. Is that just for the controllers information or does the controller enforce the protection? If the controller or software is bad can a drive be forced to write to a protected disk? Bill Sudbrink

27 years, 3 months

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PC-4 printer

by ckaiser＠oa.ptloma.edu

A non-text attachment was scrubbed... Name: not available Type: text Size: 619 bytes Desc: not available Url : http://www.classiccmp.org/pipermail/cctalk/attachments/19981231/90537eb0/at…

27 years, 3 months

2
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Shugart Model 801 (8 inch floppy)

by bill＠chipware.com

> If it has a C1 next to it you can bet it is a capacitor. > You should have rows of them on the card. Nope, I'm sure that it was a diode. The ends of it were still on the leads. There is another one next to where it was labeled "C25". > Is it is the one by the resistor and transistor? > Or the one by the two 'normal' looking capacitors on the other side? There are no transistors on the board. The diode is in the corner, near the power connector. Just for reference, the main component on the board is a 40 pin IC labeled: AMI KOREA SHUGART 16271-0 8130B1M There are only three caps that I see on the board. They are the little silver can types, no ceramics. They are labeled "C17", "C22" and "C26".

27 years, 3 months

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Virus Checking

by SUPRDAVE＠aol.com

In a message dated 12/31/98 0:33:13 AM EST, Pjoules1(a)cs.com writes: << Agreed, apart from home produced or piarate ones which you have already pointed out are always suspect. IIRC there have been rare ocasions where floppies have been distributed with viruses in bulk, one was a batch of preformatted ones where the master (or duplicating machine or whatever) was infected with aa boot sector vvirus, and I belive that there has been at least on occasion where a major software house accidentally distributed some but that was many years ago. >> i think not long ago that a commercial mac cd was shipped with a virus. can anyone elaborate?

27 years, 3 months

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8 inch floppy notes

by bill＠chipware.com

Using the CP/M FAQ I built a 34 to 50 pin converter. A couple of notes: 1) read the whole FAQ. The wiring instructions in Q14 don't take into account the IBM-PC "floppy twist". Q16 gives the wiring that worked for me. Spent an hour scratching my head on that before I read further. Primary indicative behavior: seeks with no head load, software reporting access attempts with no head load. 2) The Radio Shack General Purpose Component PC Board (Cat. No. 276-168B) makes a great platform to build the converter on. Took me about an hour to solder it up. 3) There seems to be a bug in 22DISK versions greater than 1.31. The directory read code does not seem to use the seek delay. Either that or it simply misses a head step. It always reports cylinder 2 read errors. Despite this, it can format, read and write just fine. It just can't display directories. Spent another two hours on that. BTW older versions of 22DISK can be found with FTP searches, sorry I don't remember where I got 1.31 (I downloaded 5 different versions from different sites). Bill Sudbrink

27 years, 3 months

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Replies to old threads

by Philip.Belben＠PowerTech.co.uk

Hi! I'm back! I've just been off the list for a few weeks - first a course, then two weeks ill - and I came into work after Christmas to find 1200 messages waiting for me from Classiccmp. I am trying to put replies to a few older threads together in this message. SYSTEM/23 I too have a Datamaster, and a number of the manuals. I think these machines ought to be kept running, so I'll provide what help I can. The service manuals are mainly board swappers' guides, but there is some useful info there if you dig hard enough... SINGLE INSTANCE MACHINES Do I have the only Tek 4052? I think there are at least three 4051s on the list. I also have an IBM 6150 but I doubt that's unique. I don't have the only FTS Series 88 on the list - I distinctly remember giving Tony Duell one for his 21st birthday - but I'd guess I have the only FTS Series 86. Oh yes. Tony's P850. Tony wrote: > Mine was made in about 1971. Last time I powered it up was about 3 months > ago, and it behaved perfectly. I've had it for about 12 years, and in > that time it's needed the switch contacts on some of the frontpanel > switches cleaning, and one new TTL chip in the processor. In other words > it's pretty reliable. And you had to re-solder some inter-board connecting wires on the core memory modules. IIRC these wires were little strips of springy stuff. Boards wired together with these while lying next to each other, and then folded over, the springy connecting wire acting as a hinge. Unfortunately springy wire doesn't take as well to soldering as ordinary wire... Philip.

27 years, 3 months

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Looking for PolaPulse or equivalent

by mbg＠world.std.com

I recently unearthed an acquisition from several years ago (and added it to my home_systems web page). I have a TC200, a handheld, battery-powered portable terminal which appears to have been built by IXO, Inc, yet it has a Digital logo on it (so it either was, or was going to be, marketed by Digital). It is powered by a 6v Litium battery, like the kind you find in a Polaroid film pack (but they are not identical -- the battery terminals are in different places). It is called a PolaPulse battery. Does anyone know of a source for this battery nowadays? Also, does anyone happen to have any documentation or other information about this thing? Thanks in advance... 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, 3 months

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Transformer theory (was:Re: Another ~1960 computer kit)

by Philip.Belben＠pgen.com

Dave Dameron wrote: > OFF topic: > Max wrote: > There's little need to make coils these days, and wiring electric lights > isn't very fun when one can play around with things millions of times more > complex. > > Hey! I've wound several experimental coils this year. Did you wonder _how_ a > transformer works? I know the equations to design one, but am asking > something more fundamental. The secondary winding of a transformer has > voltage induced in it, but what couples the energy to it from the primary > winding's magnetic field? > (Hint: The magnetic field can be zero at the secondary) As the list's resident electrical (as opposed to electronic) engineer, I feel I must make a stab at answering this. Especially since my first job at PowerGen was research on transformers. (Not at this fundamental level though - I was looking at fault detection systems) As I see it, when you have a winding linked with a magnetic field, you induce a voltage in the winding proportional to the rate of change of the field. If you like to visualise lines of magnetic flux, the voltage is related to the number of flux lines that actually cut the wires of the winding, not the flux linked with the winding at any time. This means, among other things, that (for sinusoidal ac) the flux is zero when the voltage is at its peak and vice versa. The transformer, though, is not a differentiator since the magnetic field is proportional to the integral of voltage in the primary. That is, flux = integral (Volts in).dt; (Volts out) = d(flux)/dt (assume = means "is proportional to") Note also that the flux depends only on voltage, NOT CURRENT. You associate magnetic fields with currents (well, I do, anyway), and as you increase the primary current you expect the field to increase. But it doesn't. An equal and opposite effect from the secondary current exactly balances this. This has a number of implications that are quite important for my current (pun not intended) job, modelling power systems. 1. The equivalent circuit of a transformer has a branch in parallel with the primary, the magnetising branch. This is an inductance representing the magnetic field (and it's in parallel, so it depends only on voltage as above) and a resistance representing "iron losses" 2. No transformer is perfect. There is regulation - inductance and resistance apparently in series with it. The resistance represents "copper loss" - the physical resistance of the windings. The inductance represents flux in each winding that _does not_ link with the other, and therefore is not backed off by current in the other winding. But in an electrical system model, the simplest representation of a tranformer is a series inductance connecting two sides of the transformer. Ironically, this represents physically the magnetic field that does not connect the two sides of the transformer! 3. For metering, protection and the rest, you see a lot of current transformers. One of these consists of a high current, low voltage primary - usually a bar running through the middle of the toroidal core - and one or more multi-turn (low current) secondaries. The equation is simple. The mmf (magnetomotive force = amps * turns) of all the windings add up to zero (equal and opposite effect of secondary current again). Because the measuring kit acts as an effective short circuit on the secondary - or drops a few volts at most - the magnetising current is almost zero, and you can thus make very accurate measurememnts. Is this the answer you wanted? Final note. What do you mean by "the primary winding's magnetic field" as distinct from that of the secondary? To a good approximation, the magnetic field is the same at both the primary and the secondary. It may be close to zero, for reasons I described. But the difference between the mag. field at the two windings contributes only to the equivalent series impedance. It is not something to look at when discussing the detailed operation of the tranformer. > As for wiring lights, Christmas tree light strings here are now cheap series > strings although the bulbs may have some wire turns wrapped around the leads > to prevent a open circuit if a bulb burns out. This often don't work, so the > entire string is usually thrown away, like many modern ASIC type computer boards Aargh! I've not heard of that (throwing the whole string away) before but I can well believe it. Philip.

27 years, 3 months

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OT, but info needed: RAM uprade

by allisonp＠world.std.com

<> Yes. The 8259 PIC (interrupt controller) is fully programmable for edge <> and level. It's possibel to go from edge to level on a common PC but you < < <Unfortunately the interrupt inputs on the 8259 are always active high <(specified clearly in the data sheet), so you still need inverters on all <the inputs for active-low lines. Yes and they would be needed as putting raw unbuffered mos inputs on a bus is bad form. <all, the reason for having a PC is compatibility. There are plenty of <nicer machines to hack about with (which is where we started). yes, multibus and other implmentations were better. Even S100 got that part right! Allison

27 years, 3 months

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Looking for PolaPulse or equivalent

by mbg＠world.std.com

I know, but the ones in the film packs aren't compatible with this one. I'm going to try to contact polaroid about it... Megan D

27 years, 3 months

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Osborne 01 for only $5000.00

by roblwill＠usaor.net

I wonder if it was a mistyped $50.00.... -- -Jason Willgruber (roblwill(a)usaor.net) ICQ#: 1730318 <http://members.tripod.com/general_1> -----Original Message----- From: Phil Clayton <musicman38(a)mindspring.com> To: Discussion re-collecting of classic computers <classiccmp(a)u.washington.edu> Date: Thursday, December 31, 1998 3:11 PM Subject: Osborne 01 for only $5000.00 >Gads!! Check this out on eBay !!! Ha! Ha! HeHeHe!!! > >An Osborne 01 for an opening bid of only $5000.00 HeHeHe!!! >As stated in the ad it could be a "Corner Stone" of your computer >collection.. > >He is even generous enough to include free shipping.. HeHe!! > >http://cgi.ebay.com/aw-cgi/eBayISAPI.dll?ViewItem&item=50980862 > >Funny thing there are no bids on it yet.. <Grin> > >Phil.. > > >

27 years, 3 months

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ZDTV sightings...

by roblwill＠usaor.net

I've got a Tandy 600. When I try to boot it, it gives an error message, seeks the floppy, then shuts off. When I restart it, it says "critical system error", or something like that, and goes into ROM (MS-WORKS). Then when I try to access something, it locks. -- -Jason Willgruber (roblwill(a)usaor.net) ICQ#: 1730318 <http://members.tripod.com/general_1> -----Original Message----- From: Roger Merchberger <zmerch(a)30below.com> To: Discussion re-collecting of classic computers <classiccmp(a)u.washington.edu> Date: Thursday, December 31, 1998 1:37 PM Subject: ZDTV sightings... >ZDTV is running a news story on donation of old equipment (right now) and - >of all things - they had a *big* table full of classic equipment! Just in >glancing, I saw 2 Tandy 100/102's, I think an Epson HX-20, and - >wherethehell'dtheygetit??? a Tandy 600! That really caught my eye. > >I'd like to find out what they are doing with the machines *after* the >story... > >See ya next year, >Roger "Merch" Merchberger > >

27 years, 3 months

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NEC CDR-84-1 SCSI Cdrom Info needed

by rhblake＠bigfoot.com

I just obtained a like new CDR-84-1 SCSI cdrom, no docs as usual. I need info on the jumper block (some may be DIP switches instead) numbered 1-6 on back as well as what speed (I'm guessing 3x) the cdrom is rated for. If someone out there might knwo where I can get a copy of it's docs or can scan and attach the pages to me it would be greatly appreciated. The cdrom is going into my Dell 4066/XE server (#2 of 3) to be used on a BBS I'm setting back up.

27 years, 3 months

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SCSI floppies

by Philip.Belben＠pgen.com

Tony Duell wrote: > I'm quite sure that things like SPARCbooks are normally considered to be > both laptops and workstations.... Oh yes. Obvious really. My SPARCbook has no internal floppy drive and communicates with an external one via the SCSI bus. Since it is my employer's property, not mine, I haven't dismantled it to see what's inside, but I imagine a standard floppy drive and an interface board... Some years ago we had a piece of data acquisition equipment called MDAS-7000. Originally made by Transera corp., by the time we bought one by Kaye Instruments. This had a 68000 CPU, a UNIX-alike in ROM (called Rnix), and built in Tektronix BASIC. The floppy drive on this was not connected to the CPU board. There was a separate board controlling it, based around an 80188 CPU, that communicated with the CPU board via, you guessed it, the SCSI bus. I wonder if the box still exists, and if so, if I can get my hands on it. Another potential Single Instance machine, I reckon... Philip.

27 years, 3 months

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Looking for PolaPulse or equivalent

by ddameron＠earthlink.net

Hi Megan, At 11:56 PM 12/30/98 -0500, you wrote: > >I recently unearthed an acquisition from several years ago (and >added it to my home_systems web page). > >I have a TC200, a handheld, battery-powered portable terminal >which appears to have been built by IXO, Inc, yet it has a >Digital logo on it (so it either was, or was going to be, >marketed by Digital). > >It is powered by a 6v Litium battery, like the kind you find >in a Polaroid film pack (but they are not identical -- the >battery terminals are in different places). It is called >a PolaPulse battery. > >Does anyone know of a source for this battery nowadays? > Would it be this one? http://www.polaroid.com/products/oem/battery/p100.html -Dave

27 years, 3 months

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Virus Checking

by Pjoules1＠cs.com

In a message dated 30/12/98 21:49:06 GMT Standard Time, ard(a)p850ug1.demon.co.uk writes: > What you're not going to get is the odd one or two CD-ROMs that are > infected, unlike floppies where it could easily happen. Agreed, apart from home produced or piarate ones which you have already pointed out are always suspect. IIRC there have been rare ocasions where floppies have been distributed with viruses in bulk, one was a batch of preformatted ones where the master (or duplicating machine or whatever) was infected with aa boot sector vvirus, and I belive that there has been at least on occasion where a major software house accidentally distributed some but that was many years ago. Regards Pete

27 years, 3 months

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Virus Checking

by Pjoules1＠cs.com

In a message dated 29/12/98 11:03:53 GMT Standard Time, tim(a)thereviewguide.com writes: > > Yes, I booted from a write protected floppy, but before that I did a > virus scan with a normal boot. A basic precaution of which some are not aware. > And of course I don't use MS Anit Virus. IIRC, it hasn't been > updated since 1992 when Windows 3.1 shipped! > Once again, you would be surprised how many people trust it. Regards Pete

27 years, 3 months

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OT, but info needed: RAM uprade

by allisonp＠world.std.com

<If I understood, this could be summed up as: <When an interrupt happens, the interrupt line is pulled low by the <interrupting device. If it's edge triggered, the CPU can't tell how many <devices are causing the interrupt and only services the first one. Assuming the interrupt was active low. the PC made it worse by being edge and active high...poor. <And are you saying that if they were level-triggered, I could have two <devices on IRQ 7? Yes! <And is it easy to design a level-triggered equivalent <to the PC on paper? Yes. The 8259 PIC (interrupt controller) is fully programmable for edge and level. It's possibel to go from edge to level on a common PC but you have to write your own drivers and other drivers would blow up. <Are all PS/2 s level-triggered or only the MCA ones? Only MCA. Allison

27 years, 3 months

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Old Radios (CAUTION)

by adavie＠mad.scientist.com

Recently a list of Russian Radios was posted to this group. I have been in communication with the sellers, with an interest to having them find me Russian calculators and computers (see my page at http://www.comcen.com.au/~adavie/slide/calculator/soviet.html). They indicated that they were able to get just about any model that I wanted, so I asked for the "top 4" - three of which had never been seen other than as grainy photographs. Within a day or so, they responded that they have the calculators I asked for. I have asked for more details - pictures - photocopy - serial numbers - anything!! No response, yet. It will be great if they really DO have what they say they have, but at this stage my scam detectors are hooting really loudly. I'd advise anyone dealing with these people to exercise caution. They may be genuine, but usually if something looks too good to be true... I'll keep the group informed, if there's any further developments. A -----Original Message----- From: Jason Willgruber <roblwill(a)usaor.net> To: Discussion re-collecting of classic computers <classiccmp(a)u.washington.edu> Date: Thursday, December 24, 1998 10:15 AM Subject: Re: Old Radios I collect old radios, and I can definitely say differently. Just try plugging in a metal-cabinet radio with a few bad tubes, turning it on, and touching the case. Also, get out of the way when a shelf collapses with a 52-pound short-wave receiver on it. Other than that, you're probably right. -- -Jason Willgruber (roblwill(a)usaor.net) ICQ#: 1730318 <http://members.tripod.com/general_1> -----Original Message----- From: Marty <Marty(a)itgonline.com> To: Discussion re-collecting of classic computers <classiccmp(a)u.washington.edu> Date: Wednesday, December 23, 1998 2:40 PM Subject: Re: Old Radios > Come now comrade Griffiths, an old radio never hurt anyone. > > Marty > > >

27 years, 3 months

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OT, but info needed: RAM uprade

by allisonp＠world.std.com

<The bit is how would _you_ have done it in 1975 with the parts <available then without knowing what would show up soon after. Try more like 1977 for the apple controller. In 75 it was two or three boards of TTL. Allison

27 years, 3 months

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Q: Tandy Model 3 and 4 Displays

by todd.osborne＠barnstormer-software.com

I have a Model 3 whose display has grown very dim. I also have the lead on 4 Model 4's that I can get for a steal. I am hoping that the display >from a Model 4 could be moved to my 3. Is this possible? Are they they same? Thanks, -- -------------------------------------------------------- Todd Osborne Senior Software Engineer FMStrategies, Inc. http://www.fmstrategies.com/ -------------------------------------------------------- FMStrategies, Inc: tosborne(a)fmstrategies.com Internet E-Mail: todd.osborne(a)barnstormer-software.com -------------------------------------------------------- Founder of the Virtual Windows Class Library (C++) http://www.barnstormer-software.com/vwcl/ -------------------------------------------------------- Anagrams? (http://www.wordsmith.org/anagram/) Can you figure out this one? Want the answer? E-Mail me. COCO VERDI MOM (Hint: Think Late 1970's Computer) -------------------------------------------------------- Quote: 2 Wrongs Don't Make a Right, But 3 Rights Make a Left! --------------------------------------------------------

27 years, 3 months

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Zork question

by DSEAGRAV＠toad.xkl.com

Can someone who's got a copy of the game (and is good enough) supply me with a description of the Wizard of Frobozz? -------

27 years, 3 months

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DEC LSI-11 WCS module (KUV11, M8018) wanted

by eric＠brouhaha.com

Does anyone have a spare DEC KUV11 writable control store module (M8018)? And/or the relevant documentation, software, and diagnostics? Thanks! Eric

27 years, 3 months

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Simon, was paper -> HTML (and The First PC)

by ddameron＠earthlink.net

Hi Doug, At 01:49 AM 12/30/98 -0600, you wrote: >In any case, here's a picture of Simon, the first personal computer from >~1950: > http://www.yowza.com/classiccmp/berkeley/simon.gif > Very interesting. Are the approx. 6 rows X 20 "modules" relays? Looks like something that could be built without too much difficulty. I assume you have it to have made the scanned image. Have you powered it? -Dave

27 years, 3 months

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OT, but info needed: RAM uprade

by kurtkilg＠geocities.com

On Tue, 29 Dec 1998 ard(a)p850ug1.demon.co.uk wrote: > What's particularly dangerous about the Mac Plus? I don't recall it being > that bad when I was inside one. You mentioned live parts in the power supply that shouldn't be live, IIRC ---------------------------------------------------- Max Eskin | kurtkilgor(a)bigfoot.com | AOL: kurtkilgor

27 years, 3 months

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Virus Checking

by Pjoules1＠cs.com

In a message dated 30/12/98 00:30:15 GMT Standard Time, ard(a)p850ug1.demon.co.uk writes: > But I don't see how a CD-ROM could be infected. In the case of file viruses it only needs the CD to contain an affected file. In the case of bootable CDs all it needs is for them to be mastered on an infected PC. In theory they can act just as well as vectors viruses but, of course, it is less likely that you will get a boot sector infection from one as I would hazard a guess that most people do not have their PC set to boot >from CD first whereas a lot of PCs are left with the floppy as the default boot device. Regards Pete

27 years, 3 months

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Virus Checking

by Pjoules1＠cs.com

In a message dated 30/12/98 03:06:06 GMT Standard Time, kurtkilg(a)geocities.com writes: > For one thing, I've never gotten any virus. FOr the other, can't you get > rid of boot sector virii w/FDISK /MBR? If not, what is a good way of > getting rid of them? fdisk /MBR is very dangerous unless you are absolutely sure what you are doing. If the machine is affected by any virus which moves or encrypts the partition table then this method will lose you all of your data. The same will happen if you are using any disk remapping software such as DM to get around size limits. Regards Pete

27 years, 3 months

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OT, but info needed: RAM uprade

by kurtkilg＠geocities.com

On Tue, 29 Dec 1998 ard(a)p850ug1.demon.co.uk wrote: > The PC? Well it has active high edge triggered signals. I believe > (although I would have to check all the details) this saves one TTL chip > on the PC motherboard. A chip costing <$0.50 in _1 off_. And we've had > the IRQ sharing problem ever since.... If I understood, this could be summed up as: When an interrupt happens, the interrupt line is pulled low by the interrupting device. If it's edge triggered, the CPU can't tell how many devices are causing the interrupt and only services the first one. And are you saying that if they were level-triggered, I could have two devices on IRQ 7? And is it easy to design a level-triggered equivalent to the PC on paper? Are all PS/2 s level-triggered or only the MCA ones? ---------------------------------------------------- Max Eskin | kurtkilgor(a)bigfoot.com | AOL: kurtkilgor

27 years, 3 months

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Virus Checking

by kurtkilg＠geocities.com

On Wed, 30 Dec 1998 tim(a)thereviewguide.com wrote: > to any OS they've seen. (Seems that most popular OS's work in a similiar > way, such as how you can change between DIR and ls fairly easily, etc. > Sometimes not that related, but nothing's really far-out there.) Yes, I've noticed that too. All variations on a theme. Except the GUIs which are somewhat more variable, and the BASICs which often come up with different ways of accessing drives. ---------------------------------------------------- Max Eskin | kurtkilgor(a)bigfoot.com | AOL: kurtkilgor

27 years, 3 months

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paper -> HTML

by jfoust＠threedee.com

At 01:15 AM 12/30/98 -0800, The Sam Ismail wrote: > >The OCR is OK when the text is just normal, and does remarkably well. But >I need an OCR suite smarter than Xerox's TextBridge Classic. I also need >some good post-processing software, or at least need to know how to scan a >simple black & white document without the scanner introducing blotches and >crap. Any suggestions? I've used Caere OmniPage in the past, and it seemed pretty good, but I wasn't trying to scan old computer docs, just nice typewriter pages. I'm very interested in the collective wisdom about this, so of course it seems quite on-topic to me. I'd like to scan the ASR-33 Teletype manuals, which contain plenty of odd hand-set type, drawings, off-size pages, schematics, etc. I'd also like to restore the UCSD Pascal manuals, of which I've heard the only electronic copies at UCSD were lost a long time ago. Given these problems of line art and odd character sets, I suspect the most useful first step would be to scan all docs at a given resolution, then store them as bitmaps in a format most easily loaded into any present or future OCR / PDF-ish program. Someone mentioned the multi-page TIFF format. As for which resolution, I think 300 DPI might be too coarse. I like Doug's idea of shooting for HTML. I recall the multi-res buttons on IBM's patent server, which allows you an easy way to browse thumbnails, then zoom in on the desired page at various resolutions. Is there an off-the-shelf tool for doing this? - John

27 years, 3 months

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OT, but info needed: RAM uprade

by roblwill＠usaor.net

Actually, Netscape still goes wacky with 32 MB RAM, and a 4.3gig HD on a P200. I think that some of the free browsers (IE, Opera, Mosaic, even NETTAMER) outperform the overpriced netscrape. -- -Jason Willgruber (roblwill(a)usaor.net) ICQ#: 1730318 <http://members.tripod.com/general_1> >>Either buggy VGA driver or not enough ram. I found NS would do that with >>8mb and with 12mb it wouldn't! >

27 years, 3 months

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Virus Checking

by SUPRDAVE＠aol.com

In a message dated 12/29/98 10:05:15 PM EST, kurtkilg(a)geocities.com writes: << For one thing, I've never gotten any virus. FOr the other, can't you get rid of boot sector virii w/FDISK /MBR? If not, what is a good way of getting rid of them? >> two notes here: you can use the /mbr switch, but if you are doing it off the hard drive, its useless. of course you'd have to boot off a clean floppy. i know in the case of pcdos7, sometimes you can run ibmavsh.exe which will immobolize some viruses like the D3 one. in that case you can run ibmavsh, run /mbr and then cycle the power and it's clean. in the case of monkey virus 2, if you run /mbr you'll lose everything on the hard drive! david

27 years, 3 months

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Old Microsoft MSX standard?

by guerney＠uq.net.au

>Richard A. Cini, Jr. wrote: > >Well, more accurately Z80 based, I do not know of any CP/M >implementations on MSX computers... > The SpectraVideo series, particularly the SVI-328, had a version of CP/M available and lots of CP/M software (languages, Wordstar, DBase II etc) were available from Spectravideo for this unit. The SVI-328 was not quite MSX (but it was what Kay Nishi based the MSX design upon). The SVI-728 was a pure MSX machine. See http://home1.swipnet.se/~w-16418/ for more details on the SpectraVideo including CP/M details. Phil Brisbane, Australia

27 years, 3 months

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OT, but info needed: RAM uprade

by roblwill＠usaor.net

> >I think you're confusing it with the browser called 'Web Explorer' which >was written at IBM and given away with their Internet Access Kit for OS/2 >Warp. > Nope. It was IE. It was back when the Internet was just starting to be a big thing. I think maybe 1993 or 94? I saw it in an article in an old computer magazine (PC-World?) article that was comparing OS/2 browsers. There was IBM's, IE, Netscrape, and a few others. I knew it was a while ago, because how many articles do you see comparing OS/2 software anymore? -- -Jason Willgruber (roblwill(a)usaor.net) ICQ#: 1730318 <http://members.tripod.com/general_1>

27 years, 3 months

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Looking for cheap Powerbook Duo parts

by roblwill＠usaor.net

Do any of the other Mac's have that sort of info thing in the ROM? -- -Jason Willgruber (roblwill(a)usaor.net) ICQ#: 1730318 <http://members.tripod.com/general_1> -----Original Message----- From: Zane H. Healy <healyzh(a)aracnet.com> To: Discussion re-collecting of classic computers <classiccmp(a)u.washington.edu> Date: Wednesday, December 30, 1998 8:17 AM Subject: Re: Looking for cheap Powerbook Duo parts >Since I'm not sitting in front of one, this is all off the top of my head, >but I do know that the info includes date of manufacture and how many hours >it's been running. I would assume it also has a Serial Number had Product >ID, but can't remember. I think the only way to get this info would be with >a software tool that specifically looks for it, but this requires the OS. >I've used "TechTool" IIRC to view the data. > > Zane >

27 years, 3 months

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HELP!!!! TRS-80 Mod III M/B NEEDED!!!!

by roblwill＠usaor.net

*The broad traces are wrinkled and bubbled, light green in colour and *coating is easily comes off. Yup. And that coating burns easily, too. *That transformer is under the floppy, and is about tad under 25" *cubic size. Saw them in few III's. Those III's are very popular in *high school they're by bunches. Woah! a 25 cubic inch transformer! I hope that's a typo. It wouldn't even fit in the case. Must be some special model of III. The only thing that's under the floppies on mine (or any others that I've ever seen) is the ribbon cable from the keyboard. -- -Jason Willgruber (roblwill(a)usaor.net) ICQ#: 1730318 <http://members.tripod.com/general_1>

27 years, 3 months

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OT, but info needed: RAM upgrade

by kurtkilg＠geocities.com

On Tue, 29 Dec 1998 gram(a)cnct.com wrote: > Hell, how would Woz redo it knowing evolution? *shudder* He wouldn't. He would be running an ISP or be an 3133t \/\/4r3z d00d or some other thing computer geeks do these days ---------------------------------------------------- Max Eskin | kurtkilgor(a)bigfoot.com | AOL: kurtkilgor

27 years, 3 months

1
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OT, but info needed: RAM uprade

by allisonp＠world.std.com

<> >How is it then I got it for free off their site? <> > <> Not sure. Last time I tried to download it was about two years ago. <> <Netscape has been available for download since at least vers=2. I don't <recall if i ever used version 1. heck, don't even know if there was a 1. I ran 1.4 and it was cranky. the next version I used was 2.0 better and free. The last one I DL'd was 3.0+ for w3.1 and that was free (about two years ago!). I use IE, NS for my work they, do what I want most of the time. Allison

27 years, 3 months

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HELP!!!! TRS-80 Mod III M/B NEEDED!!!!

by roblwill＠usaor.net

O.K. I decided to use my TRS-80 Mod III to type a story (about 100 pgs or so) that was an assignment for my Communications class in school because it has a good keyboard for lots of typing, and it has a clear printer. I get it all typed up (three SCRIPSIT files), switch on the trusty DWP II, and start printing. As the first two pages are done, I reach onto the shelf (above the computer) to get a paperclip to hold the whole thing together when it's done. Now the paperclip that my hand happens to grab is secretly joined to another paperclip, which (naturally) decided that it didn't want to leave the little cup they're all in. The whole thing spills out, sending 9 of them INTO the computer. The screen blacks out, printer stops, I hear two sharp pops, a puff of smoke, lights dim, and I hear the snap of the circuit breaker from across the basement. I say a quick string of explicitives directed at the paperclips while I'm searching for the flashlight, which (again - naturally), has dead batteries. I start pulling all the plugs in the area of the computer, and carefully make my way to the breaker box. I find the tripped switch, flipped it back on, and went back over to the computer, which was surrounded in a bit of a haze. I grabbed a screwdriver pulled the case apart, removed the paperclip that was shorting the main power transformer. I plugged it in, and turned it on (at that time not knowing that 9 paperclips had went in). Smoke bomb. White smoke was pouring out of the M/B compartment. I removed the cover and found the other 8 clips, one partially melted into the Z80. The serial board was almost totally black (never worked anyway). I was thinking four words: Why me. Why NOW?! Naturally, I have a spare P/S board, video board, and floppy controller, but no spare M/B. Does anyone have a spare board that they wouldn't mind selling for a couple of bucks, or I could take it off your hands so you don't have to throw it out :) My board had 48k RAM. Or was it 32? I forget, but it wasn't 16, which is what the case says. I don't really care how much it has (16 will run SCRIPSIT, won't it?), and I probably have chips laying around that'll work in it, anyway. If anyone has an RS-232 board laying around, I may be interested in that, too (not a rush, though), so I can connect the 300baud acoustic modem and have the "world's slowest computer connected to the Internet" :) ThAnX in advance, -- -Jason Willgruber (roblwill(a)usaor.net) ICQ#: 1730318 <http://members.tripod.com/general_1>

27 years, 3 months

3
3
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OT, but info needed: RAM uprade

by kurtkilg＠geocities.com

On Tue, 29 Dec 1998 ard(a)p850ug1.demon.co.uk wrote: > Totally crazy designs like the IBM PC interrupt system. Well, I've heard many complaints about it, but I don't know what's actually wrong with it, and I doubt I would understand if you told me. But try anyway. ---------------------------------------------------- Max Eskin | kurtkilgor(a)bigfoot.com | AOL: kurtkilgor

27 years, 3 months

2
1
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Virus Checking

by kurtkilg＠geocities.com

On Tue, 29 Dec 1998 Pjoules1(a)cs.com wrote: > Also, you do not say what virus scanning software you are using bear in mind > that MS anti virus doesn't detect many common viruses. Such as Windows 95...sorry, couldn't resist ---------------------------------------------------- Max Eskin | kurtkilgor(a)bigfoot.com | AOL: kurtkilgor

27 years, 3 months

4
3
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Virus Checking

by kurtkilg＠geocities.com

On Tue, 29 Dec 1998 gram(a)cnct.com wrote: > If you're dual-booting, installing Linux (and LILO) will not get rid > of many (installed under DOS) boot-sector viruses. I speak from > experience I'd prefer to have avoided, but the experience was in the > long run invaluable. I'll never dual-boot again, in fact I'll boot > even my Linux-only systems from floppy most of the time. For one thing, I've never gotten any virus. FOr the other, can't you get rid of boot sector virii w/FDISK /MBR? If not, what is a good way of getting rid of them? ---------------------------------------------------- Max Eskin | kurtkilgor(a)bigfoot.com | AOL: kurtkilgor

27 years, 3 months

1
0
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OT, but info needed: RAM uprade

by SUPRDAVE＠aol.com

In a message dated 12/29/98 8:43:40 PM EST, kurtkilg(a)geocities.com writes: << On Tue, 29 Dec 1998 ard(a)p850ug1.demon.co.uk wrote: > Totally crazy designs like the IBM PC interrupt system. Well, I've heard many complaints about it, but I don't know what's actually wrong with it, and I doubt I would understand if you told me. But try anyway. ---------------------------------- >> the way i understand it is that the pc interrupt system is edge triggered. i think an interrupt went low only momentarily and if the machine happened to overlook that interrupt, the machine would hang. on the ps2 models, the interrupts on that are level sensitive, meaning that an interrupt request goes low and stays low until it's satisfied. there is much less possibility of level sensitive interrupts going unnoticed. ps2 models can also share IRQs.

27 years, 3 months

1
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OT, but info needed: RAM uprade

by KFergason＠aol.com

In a message dated 12/29/98 5:15:15 PM Pacific Standard Time, roblwill(a)usaor.net writes: > >How is it then I got it for free off their site? > > > Not sure. Last time I tried to download it was about two years ago. > Netscape has been available for download since at least vers=2. I don't recall if i ever used version 1. heck, don't even know if there was a 1. kelly

27 years, 3 months

2
1
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OT, but info needed: RAM uprade

by pete＠dunnington.u-net.com

On Dec 29, 19:49, Roger Merchberger wrote: > Subject: Re: OT, but info needed: RAM uprade > Once upon a midnight dreary, Jason Willgruber had spoken clearly: > > >Last time I checked on it, Netscrape Communicator was somewhere around $45 > >in the stores, > > But *free* to download from the web. To purchase IE *all by itself* costs > money, too. They can't print books / cd's, etc. for free. > Netscape has not *always* been free. It was turned into free software in > (IIRC) October or November of '97. Since then, if you got a stripped > version, you *asked* for it (to save space) and all date-disabled versions > of the software disappeared. It was free for educational use (including home users) since at least 1994, when I obtained version 2.something to replace the 1.01 that was on the machine I was using then. IIRC, you were supposed to register it, but there was no fee if you "signed" a declaration that you were in education. I remember that the download was a massive 2MB and I had to split it across two floppies... -- Pete Peter Turnbull Dept. of Computer Science University of York

27 years, 3 months

1
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more interesting finds!

by musicman38＠mindspring.com

Hi Joe, Where is this scrap place you are talking about? I know there are a couple of them here, never thought of looking there before. Do they sell you the stuff as scrap ? Or by the pound..? Phil.. -----Original Message----- From: Joe <rigdonj(a)intellistar.net> To: Discussion re-collecting of classic computers <classiccmp(a)u.washington.edu> Date: Wednesday, November 25, 1998 9:27 AM Subject: more interesting finds! >I went to a scrap place yesterday and found a couple of interesting items. >One is a 16K core memory board for a Data General Nova. Huge sucker! It's >marked "DATA GENERAL CORP DGC NOVA 800 16K MEMORY STACK copyright 1973". >Anyone need this or should I just hang it on the wall to admire? > > > I also found several odd looking boxs that are labled as HDS ViewStation. >they're made by a company called Human Designed Systems. They're about 2" >tall and 12" square. They have connectors for all the following; thick and >thin ethernet, twisted pair, sun keyboard, standard PC keyboard, RJ serial >port, DB-25 serial, DB-25 parallel, PS-2 mouse and standard VGA video. >Does anyone know what these are or why they have so many ports? > > Joe > > >

27 years, 3 months

3
2
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OT, but info needed: RAM uprade

by roblwill＠usaor.net

>How is Netscape overpriced when it's free? (Admittedly some of the >built-in links lead to adverts). IE is "free"? It is to laugh. It >only "runs" under 1.5 operating systems -- Windows and the new MacOS. >And it _really_ wants you to visit Microsoft and sign up for msn.com, >fuck, it insists on it. It took my wife most of an hour to _not_ >sign up for msn, gods help anybody without competent advice, who >might have given in. Last time I checked on it, Netscrape Communicator was somewhere around $45 in the stores, where IE was free with about 10 different programs. Netscrape came with the program that I bought, and it was a stripped version that kept wanting me to sent $30 to Netscrape, and it stopped working after 6 months (date stamped). Let's see...IE only wanted me to sign up with MSN once, and that was because I used an MSN trial CD to install it. First time I ran it, I simply went into the settings, set the start page as blank, and Bingo! no MSN. If you ever noticed, When you got Netscrape on an AOL CD, it _really_ wants you to sign up for AOL AND pay $30 to them. -- -Jason Willgruber (roblwill(a)usaor.net) ICQ#: 1730318 <http://members.tripod.com/general_1> Seems to me that I remember an old version of IE that was for OS/2, too.

27 years, 3 months

3
2
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OT, but info needed: RAM uprade

by allisonp＠world.std.com

<I ran it, I simply went into the settings, set the start page as blank, an <Bingo! no MSN. If you ever noticed, When you got Netscrape on an AOL CD, <it _really_ wants you to sign up for AOL AND pay $30 to them. How is it then I got it for free off their site? AS to which is better, neither when broken and both when working with one little gotcha... If the site uses netscape tools to gen interactive queary pages I've found IE to be univerally broken and netscape is required! Oh, same for IE tooled pages. Allison

27 years, 3 months

1
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HELP!!!! TRS-80 Mod III M/B NEEDED!!!!

by roblwill＠usaor.net

>Oh, I see. Any ideas where the smoke is coming from? As is well known, >computers and ICs run on smoke, so when the smoke comes out they stop >working... > Basically, it's coming from everywhere. I think it's mostly the enamel burning off the traces, and from the melting Z80. >> I have a scope that someone was going to trash that appears to work, but I >> don't have any cables but a couple of old multitester cables. >> I doubt there would be any _useful_ activity on the Z80 pins. The chip is >> basically melted. Most of the chips are like that. There's paper clips >> permanantly fused to other parts of the board. > >Ouch!!! I'm not going to try to reproduce this, but I wonder what >actually happened. Yes, OK, paper clips shorted all sorts of things >out, but what did all the damage? > Huh? The solder melted in a lot of the places, and the paper clips stuck to it. There's a lot of fried traces, too. Instead of trying to fix it, I'd be MUCH better off just finding another board. -- -Jason Willgruber (roblwill(a)usaor.net) ICQ#: 1730318 <http://members.tripod.com/general_1>

27 years, 3 months

4
5
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OT, but info needed: RAM uprade

by allisonp＠world.std.com

<The 8086 had been around that long, the 8088 was done at IBM's <request -- the marketing concept worked well enough that the later <SX processors were done on purpose. Ah, not really. the production start dates for both chips are within two months. The 8088 was for those smaller (non PC!) apps that needed the lower cost of 8bit wide everything but still needed more performance than the 8085 could deliver and also gave a migration path for those that grew out of the 8088. The 8088 and 8086 were both second sourced before IBM did the XT. thats based on my non-preliminary intel data books from late 78 and early 79. NEC was making reverse engineered parts by 81! Even the V20 was in 81. Allison

27 years, 3 months

1
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OT: OS/2 2.0

by kurtkilgor＠bigfoot.com

I know this is somewhat off-topic, since OS/2 2.0 is too new, but does anyone know where I could get the software to get it to connect to the internet via PPP? I installed it, and it's a fairly nice system. ---------------------------------------------------------------------------- ----- Max Eskin | kurtkilgor(a)bigfoot.com | AOL: kurtkilgor

27 years, 3 months

4
3
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OT, but info needed: RAM uprade

by ddameron＠earthlink.net

Hello all, At 11:16 AM 12/24/98 -0500, you wrote: >I did however do some major tuning tricks on the cmos and things like >windows swap drive. Some of those old boards if you take the cmos defaults >you get a very pokey system often 1/3 the performance or worse. > >Allison > Yes. I've been using a 386DX with 128k cache with Win3.1 and Netscape 3.0. Doesn't seem significantly slower than my friend's P90 with W95. Sometimes Netscape crashes with some .JPG files (GP fault in the VGA driver) and I have to start over. Haven't tried much newer, it doesn't seem right to require a 300MHz processor and 64MB ram to mostly read email, much less type mail messages! I did adjust several things, like remove smartdrv's "buffering" for the HD, etc. -Dave

27 years, 3 months

6
6
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Pentium(TM)

by gareth.knight2＠which.net

Doug Yowza >I don't remember if Intel actually filed suit to protect "486", for >example, but they would have had to fight standard industry practice of >using similar part numbers to indicate similar functionality. Something >like "pentium" is much easier to protect, but you could probably open a >Pentium Shoe Store and be on perfectly good legal ground. I seem to remember a company called Gentium being forced by Intel to change their name during 1995 as it sounded to similar to their own processor. -- Gareth Knight Amiga Interactive Guide | ICQ No. 24185856 http://welcome.to/aig | "Shine on your star"

27 years, 3 months

1
0
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TIP manuals?

by DSEAGRAV＠toad.xkl.com

Anyone have any docs/etc. for a TIP? (Terminal Interface Processor) -------

27 years, 3 months

1
0
0 0

Which MathCo for a 387SL

by jruschme＠hiway1.exit109.com

Okay, so it's a little new for the list... Next week I'm going to try and finally rebuild the 80386SL-based notebook that's been a pet project for a while. Since I'll have it open, I thought I might go ahead and install a math coprocessor. My only question is... which one? The 386SL was Intel's "notebook" CPU. Does it require a 387DX, 387SX, or something else altogether? If it's the 387SX, can I use a Cyrix FastMath, as I have a spare. Thanks... <<<John>>>

27 years, 3 months

2
1
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OT, but info needed: RAM uprade

by roblwill＠usaor.net

> >But *free* to download from the web. To purchase IE *all by itself* costs >money, too. They can't print books / cd's, etc. for free. > Yup. $5, I think. >>Netscrape came with the program that I bought, and it was a stripped version >>that kept wanting me to sent $30 to Netscrape, and it stopped working after >>6 months (date stamped). > >Installed '98 lately? That was the _first_ mistake... It may be better than Win 95 (some say), but I don't like to run any OS that crashes the demo computer at the launching of the software. No matter how many "revisions" it has. > >Can you still get it? --- They had a version that was supposed to run on >Linux, too. They almost got it out - 6 months or so behind schedule, then >they scrapped it. Pi$$ed off some users with that one... Billy-bob doesn't >care, tho. > No clue. It was back when OS/2 was one of the "good OS's that I didn't have" - I was still running a Franklin 2000. When I got finally PC-compatible, I was running Win 3.1. When I finally got OS/2, the borrower's no where to be found. Figures! -- -Jason Willgruber (roblwill(a)usaor.net) ICQ#: 1730318 <http://members.tripod.com/general_1>

27 years, 3 months

1
0
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OT, but info needed: RAM uprade

by roblwill＠usaor.net

> >How is it then I got it for free off their site? > Not sure. Last time I tried to download it was about two years ago. -- -Jason Willgruber (roblwill(a)usaor.net) ICQ#: 1730318 <http://members.tripod.com/general_1>

27 years, 3 months

1
0
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OT, but info needed: RAM uprade

by roblwill＠usaor.net

> >Especially if you live in the boondocks (rural area for those not >accustomed to the slang) where MSN doesn't have a dial-up number. Then it >*automatically* dials 150 miles away - and doesn't tell you it's making a >long-distance call. > >$300 (or more) phone bill later... > Not if you go into the IE4 directory and directly run the installation of the browser, instead of running the MSN setup. >Oh, and Opera is *not* free. IIRC, they want $35 to register it. IMHO, it's >worth the money -- it's *very* fast, and doesn't seem to crash often. But - >it's not free. > Similar to what Netscape does (last version I had did it). I think it is better, though. -- -Jason Willgruber (roblwill(a)usaor.net) ICQ#: 1730318 <http://members.tripod.com/general_1>

27 years, 3 months

1
0
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video reversing

by roblwill＠usaor.net

Hi. I've got an old CGA laptop. (1988 Zenith SupersPORT). The display is dark blue on light blue. I was wondering if there's any software out there that will reverse the video so that the text is light blue, and the background is dark blue. ThAnX, -- -Jason Willgruber (roblwill(a)usaor.net) ICQ#: 1730318 <http://members.tripod.com/general_1>

27 years, 3 months

2
1
0 0

Commodore Pet 2001

by foxnhare＠goldrush.com

> From: Phil Clayton <handyman(a)sprintmail.com> > Subject: Re: Commodore Pet 2001 > > Thanks Larry for all the information on the Pet,I feel like a kid on Christmas with my > new find.. > Like I said in 1978 this is the very first computer that I got bug from. > It was in a window of a High-tech Gadget type store with a great > graphics demo running. I have some of the original Commodore graphics demos (which they sold on tape), there was the one with bar graphs and business stuff and another one with like a mouse in a cage and star wars ships (not very exciting nowadays as they were then), also one called mandala which is in ML and does a kalidescope effect. > I inquired about it from the Clerk there who knew nothing > about it. Nor did I, but it was pure Lust on my part with the thought of owning > such an obviously powerful computer. When he told me the price of $599.00 My first view was from the cover of the October 1978 Popular Science: http://www.goldrush.com/~foxnhare/PSPETSM.JPG The PET there was obviously one of the prototypes (note the rounded case, from what I understand it was wooden, also note the cheap wood-grain contact paper over the case. kinda looked neat though.) > I know it would be some time before I could own it. So now only 21 years later > I have one. Yeah I think that sums it up for most of us classic computerists... (grin) or better yet 'I have every computer that I wanted.' > > I will take look see if its the earliest version Basic or the upgraded one. > > Now when it powers up if it reads: > > *** COMMODORE BASIC *** > > you have the original classic (read 'bug-ridden') ROMs.if it reads: > > ### COMMODORE BASIC ### > > you have the 'upgrade' (mostly bug fixed) ROMs. > > The earlier units used butchered SANYO cassette players > Mine has the the Sanyo Cassette with White keysAlso the border around the screen is blue > not White or Black like some others I have seen.. > > Does this indicate an earlier Pet ? Yes it does; so far so good. (Never seen a white trim myself unless you are referring of the plastic frames on the later plastic-cased PET models (there was still a black trim around the picture tube though.)

27 years, 3 months

3
2
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Virus Checking

by Pjoules1＠cs.com

In a message dated 28/12/98 16:03:08 GMT Standard Time, marvin(a)rain.org writes: > I suspect a virus, but my antivius software > > didn't find one, but I don't really trust it. I only really trust it if > it > > find a virus...) > > One of the ways I use to check for a virus is to run CHKDSK and look at the > total memory. For a number of viruses I have seen, the normal number of > 655360 gets reduced to some other value. Many stealth viruses can hide from virus checkers as well as not showing the memory they occcupy as used. When you ran the scanner did you boot from a _known_clean_ write protected floppy, this is essential for reliable scanning. Also, you do not say what virus scanning software you are using bear in mind that MS anti virus doesn't detect many common viruses. Regards Pete

27 years, 3 months

2
1
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HELP!!!! TRS-80 Mod III M/B NEEDED!!!!

by roblwill＠usaor.net

Oh. I didin't know that. You've got one of the cassette models. Wanna sell the M/B?? -- -Jason Willgruber (roblwill(a)usaor.net) ICQ#: 1730318 <http://members.tripod.com/general_1> >I'm aware of that. Because mine did not come with ANY disk drives, it is >also missing the drive mounting tower, drive PSU card, and controller. > >-- >ok >r. r e d @ b e a r s . o r g > =========================== > [ urs longa | vita brevis ] > >

27 years, 3 months

2
1
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Seagate ST-506 DIP switch settings needed

by roblwill＠usaor.net

>Probably no great point in that. FDISK cannot usually see an ST-506/412 >interface HD that has not been low level formatted on the controller in >use at the time. Set the switch for the appropriate cable, and power up >the computer. Bring up DEBUG and at the '-' prompt, enter DC800:0<CR>. >If you see ASCII text that indicates that you are looking at a WD >controller, then enter G=C800:5 and follow the prompts to low level >format the disk. If this is successful - if the disk is good - then >FDISK should see it on the next bootup and you can go on from there. > >If it is not successful, you probably have a bad HD. Also, if your >DC800:0 search does not yield ASCII, try other addresses in 200H >increments. That is, such as CA00:0, CC00:0, etc. > I think I've narrowed it down to the controller being the problem. I remember seeing somewhere that the WD-XT-GEN won't recognize the original ST-506. I'll have to try it with another controller sometime, and if it doesn't work, I'll try to find another HD. -- -Jason Willgruber (roblwill(a)usaor.net) ICQ#: 1730318 <http://members.tripod.com/general_1>

27 years, 3 months

2
1
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HELP!!!! TRS-80 Mod III M/B NEEDED!!!!

by roblwill＠usaor.net

*One thing I ASK: HOW come those clips can slip in those slotted *vents (it's blocked by screening too!) and trap into their deadly *short circuits act on that _VERTICAL_ board?! I thought that would *be more possible if the boards were horizontal. Well, there was no screen on the vents in _this_ TRS-80. Also, when I got the computer (it had been in a flooded basement), the rear CPU board shield/cove had rusted fairly bad, and when it was on, the computer wouldn't boot, so it wasn't there. I'm not sure of the exact path the paper clips took, but once they hit electric current, they stayed there. The one that fell across the 120v main PSU power connector actually fused to the connector, and I had to use a wire cutter to remove it. *That is what I'm talking about in those silver-grey clamshell with *9" mono monitor, space for 2 5.25" FDs, orange reset key, great *keyboard, cutouts for 2 extra add on cards to interface with outside *world for external boxens. Power rocker switch on right side just *underside. Sort of. It's got a 12"mono TV tube in the case. Clamshell? Isn't that what they called the Zenith laptops? Or are you referring to the color? Mine had the two floppies, and the two cutouts for the add-on cards were for serial and floppy (serial was optional, the floppy one was just the bottom of the FDC). Mine had both, although the serial card (which never worked right) is a charred mess. I'm not sure how it happened, either. There weren't even any paperclips in it. *I had it years ago but it blew up somewhere by stray static. No *smoke to hint at all The whole side of my basement had a slight fog. The whole house stunk, too. -- -Jason Willgruber (roblwill(a)usaor.net) ICQ#: 1730318 <http://members.tripod.com/general_1>

27 years, 3 months

2
1
0 0

Mac Portable Modem Init String

by roblwill＠usaor.net

I did. I'm using Mac PPP, with System 7.5. The program still wants an init string. > >What terminal program have you tried using? According to the manual, you >must select "internal modem" in the "portable" control panel. >---------------------------------------------------- >Max Eskin | kurtkilgor(a)bigfoot.com | AOL: kurtkilgor > >

27 years, 3 months

1
0
0 0

Impatient RSX-11M Question

by dburrows＠netpath.net

>OK, I'll admit it, I hate waiting for RSX-11M to shutdown when I'm in a >hurry to reboot into RT-11. How important is it to do a proper shutup? >Modern OS's care, does RSX? > I just make sure nothing is writing to the disk and switch off. If everything is idle just kill it. I have never had one come back to get me in over 18 years. This works if you are the only user. Dan

27 years, 3 months

1
0
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HELP!!!! TRS-80 Mod III M/B NEEDED!!!!

by roblwill＠usaor.net

> >All this reminds me that I'm still searching for disk drives and attendant >hardware (and software) for my Model III. > Just throw in any old 360k drive. It'll work. Mine had one original TRS-80 drive, an IBM drive pulled from a PC, and the external drives were an IBM 4869 with a toshiba 360k drive pulled from a Leading Edge duct-taped on top of it, using the 4869 P/S. The controllers for the externals were salvaged >from dead Mod. I disk boxes, and housed in a Tupperware freezer container that sat behind the drives. -- -Jason Willgruber (roblwill(a)usaor.net) ICQ#: 1730318 <http://members.tripod.com/general_1>

27 years, 3 months

2
1
0 0

RT-11: DUSTAT Question

by healyzh＠aracnet.com

On RT-11 does DUSTAT care what kind of a disk controller you've got? I just spent a bunch of time fighting to get it onto my RT-11 system only to find out that once I got it assembled, it doesn't like something about the system. I suspect it's either the WEQSD ESDI Controller, or the ESDI drives I'm using. It gives the following error: ?DUSTAT-F-No translation for this unit! (?) Or am I confused and using the wrong syntax? .DUSTAT DU2: 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.dragonfire.net/~healyzh/ |

27 years, 3 months

1
0
0 0

Mac Portable Modem Init String

by roblwill＠usaor.net

Hi! I was wondering if anyone knows the init string for the Mac Portable Internal 2400 baud modem. ThAnX, -- -Jason Willgruber (roblwill(a)usaor.net) ICQ#: 1730318 <http://members.tripod.com/general_1>

27 years, 3 months

1
0
0 0

Impatient RSX-11M Question

by healyzh＠aracnet.com

OK, I'll admit it, I hate waiting for RSX-11M to shutdown when I'm in a hurry to reboot into RT-11. How important is it to do a proper shutup? Modern OS's care, does RSX? 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.dragonfire.net/~healyzh/ |

27 years, 3 months

1
0
0 0

HELP!!!! TRS-80 Mod III M/B NEEDED!!!!

by roblwill＠usaor.net

>I would bet on the FDC still being OK, though. I've found the 1793 chip >(the big 40 pin one) is very easy to zap. And you'll not test that without >a working CPU board (the motor on/drive select logic is totally separate, >BTW) > Probably. No paper clips had fallen into it, and no signs of external damage. I really won't know if it's good or not 'till I get a new board. Even if it is blown, I have a good, spare one. >If you connect the CPU board to the PSU does the PSU still come on? Don't >connect any other cables at this point. Do you have a scope or logic >probe? If so, is there any activity on the Z80 pins? > It still turns on, but makes the CPU board seem more like a fog machine than a computer, and it stinks up the house pretty bad. I have a scope that someone was going to trash that appears to work, but I don't have any cables but a couple of old multitester cables. I doubt there would be any _useful_ activity on the Z80 pins. The chip is basically melted. Most of the chips are like that. There's paper clips permanantly fused to other parts of the board. > >The model 4 keyboard is the same as the model 3 keyboard but with 5 etra >swtiches. They're both 8*8 matrices of swtiches with some positions >unused. And the keys are in the same electrical position on the 2 keyboards. > >So a model 3 keyboard should work with a model 4 CPU board - you just >won't have the control/caps/F1/F2/F3 keys. Model 3 software running on >the 'Model 4' shouldn't mind that. Some model 4 software will be hard to >use without those extra keys, though. > Anyone have a spare Model 4 board laying around anywhere?? Model III? ThAnX, -- -Jason Willgruber (roblwill(a)usaor.net) ICQ#: 1730318 <http://members.tripod.com/general_1>

27 years, 3 months

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OT, but info needed: RAM uprade

by kurtkilg＠geocities.com

On Mon, 28 Dec 1998 ard(a)p850ug1.demon.co.uk wrote: > > >Give an engineer a copy of the PC techrefs and count how many times he > > >says 'They did WHAT???' as he reads the schematics :-). It appears that > > >if there are 2 ways to do something, the PC always made the worst > > >choice... But then, how many PCs are there of which this can be said? I can think of: *IBM PC - tony said it, not I *Altair - I think the general consenus is that it was a cheap design *IMSAI - The PSU and cooling design *Apple /// - I guess the main problem w/these was the high-density board *Mac Plus - The PSU and probably other stuff too *VICs and C-* - I've heard almost everything about these Of course, I would have included many modern computers, but one can hardly give someone the techrefs for those :) > There's a difference between a cheap (either to design or to manufacture) > design and a crazy design :-) Any dangerous parts, like in the Mac Plus? ---------------------------------------------------- Max Eskin | kurtkilgor(a)bigfoot.com | AOL: kurtkilgor

27 years, 3 months

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test-drb