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

by jimw＠agora.rdrop.com

At 02:49 PM 9/19/98 -0700, Sam wrote: >On Sat, 19 Sep 1998, Tony Duell wrote: > >Today I plugged in the front panel and a Cromemco ZPU. It worked! The >address LEDs 15, 14 and 13 are sequencing in a binary pattern. I don't >know what this means, but at least it shows life. I got the same results >with another ZPU. I can single-step it and see different stuff happening, >but I have no idea what its doing. I buried my friggin IMSAI manual in a >box a few weeks back. No memory installed? It is executing a RST 7 (0FFH) which pushes the current address onto the stack and jumps to 038H (070 octal), and finding yet another 0FFH there, repeats the exercise forever... You are seeing the stack pointer reflected in the lights when running... It's a good sign. -jim --- jimw(a)agora.rdrop.com The Computer Garage - http://www.rdrop.com/~jimw Computer Garage Fax - (503) 646-0174

27 years, 10 months

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High density disks on double density drives

by roblwill＠usaor.net

In PC's, I always use 1.44 meg disks in 720k drives. I just tape over the second hole, and format them in one of my 720k machines. I have one of these "doctored" disks that is 5 years old, and still holding its original data strong and true. It has even been around magnetic fields (slit off monitor onto back, right above coil), and hasn't lost a byte. -- -Jason (roblwill(a)usaor.net) ICQ#-1730318 ---------- > From: Chuck McManis <cmcmanis(a)freegate.com> > To: Discussion re-collecting of classic computers <classiccmp(a)u.washington.edu> > Subject: Re: High density disks on double density drives > Date: Saturday, September 19, 1998 2:41 PM > > It is neither the drive nor the controller per-se, it is the read/write > heads and the media that are incompatible. HD disk media requires a higher > magnetic field to magnetize reliably and the DD drives don't provide it. > > --Chuck > > At 01:36 PM 9/19/98 -0500, you wrote: > >I've heard that you shouldn't use high density disks in double > >density drives, that the data wouldn't be reliable.

27 years, 10 months

2
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NeXT tidbits

by healyzh＠ix.netcom.com

Last weekend I got a Monochrome NeXTstation Turbo slab, and with a little difficulty was able to clear out the root password using the procedures that are fairly easy to find on DejaNews. However, NetInfo was giving me a fit, and kept setting the root password back to something else. Never did solve that, because I found a cleaner solution. I found a message using DejaNews in which someone recommends prior to selling a networked NeXT system that you copy /usr/templates/client/etc/hostconfig and netinfo/* to /private/etc and then reboot. The system is then in a "out of the box" standalone configuration. When you reboot you're then in the "me" account. Another useful piece of info that I found is that most of the "Lighthouse Design" apps are now available with a free 2 user license at http://www.peak.org/next/apps/LighthouseDesign/ These apps seem to all be quad-fat binaries, and include a Word Processor, 2 different Spreadsheets, a Database, Bitmap and Vector based graphics programs, and some other stuff. You can use them to turn your old NeXT system into a truely useful system. Not sure what you'd have to do for a local printer, I'm printing over the network to the Postscript HP 5MP on my Linux box. Zane | Zane H. Healy | UNIX Systems Adminstrator | | healyzh(a)ix.netcom.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, 10 months

1
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Help: IBM 5170

by roblwill＠usaor.net

I had a similar problem when I got my 5170 board. I replaced the RAM chips, and it worked fine after I ran SETUP. Try replacing the RAM chips. It sounds like that that is your problem, too. -- -Jason (roblwill(a)usaor.net) ICQ#-1730318 ---------- > From: oajones <oajones(a)bright.net> > To: Discussion re-collecting of classic computers <classiccmp(a)u.washington.edu> > Subject: Help: IBM 5170 > Date: Saturday, September 19, 1998 6:59 PM > > Recently I bought 2 IBM 5170's (PC/AT) for 6 bucks. I bought these > machines to add to my collection. Both of them say this when I boot up: > "162 - System Options Not Set - (Run SETUP)" > Both of them have a 512k System board. One only shows 256K of memory > during memory test and the other one shows 512K but has a parity error. > Is there any dip switches on the motherboard, and is SETUP a software > program? > > Thanks... > --Alan > -- > Computing since: 1982, VIC-20, CoCo, PC, CP/M > Amateur Radio since: 1971, WN8JEF, KA6EXR, N8BGR, AA4ZI > BASIC, dBASE, Assembly, C++ > <A > HREF="http://www.bright.net/~oajones">http://www.bright.net/~oajones</A>

27 years, 10 months

1
0
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Kids these days

by tomowad＠earthlink.net

>You might get an old EPROM programmer at a Radio rally/hamfest. But >they're often not that cheap. How about buildign one for your next >project - to program standard EPROMs (2764s - 27512s, say) is not that >hard. Basically you have to set up the address and data, take one of the >pins (Vpp) up to 12.5V (or 21V, or even 25V on older devices) and then >apply a 50ms program pulse to another pin. And repeat for all the >locations you want to program. I have a BAL-500 EMROM Programmer for the Apple II I've been meaning to experiment with. No documentation or software, of course. Is any "special" software required to operate an EPROM programmer, or can it be programmed using the Apple II's BASIC or Assembly (not that I know assembly)? >When i built my first embedded control system I had to build an EPROM >programmer first.... Tom Owad -- Sysop of Caesarville Online Client software at: <http://home.earthlink.net/~tomowad/>

27 years, 10 months

2
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Help: IBM 5170

by oajones＠bright.net

Recently I bought 2 IBM 5170's (PC/AT) for 6 bucks. I bought these machines to add to my collection. Both of them say this when I boot up: "162 - System Options Not Set - (Run SETUP)" Both of them have a 512k System board. One only shows 256K of memory during memory test and the other one shows 512K but has a parity error. Is there any dip switches on the motherboard, and is SETUP a software program? Thanks... --Alan -- Computing since: 1982, VIC-20, CoCo, PC, CP/M Amateur Radio since: 1971, WN8JEF, KA6EXR, N8BGR, AA4ZI BASIC, dBASE, Assembly, C++ <A HREF="http://www.bright.net/~oajones">http://www.bright.net/~oajones</A>

27 years, 10 months

3
3
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Does Bill Gates know how to program?

by maxeskin＠hotmail.com

Interesting that BG actually realizes that the filesystem where he never had to save anything was cool. And why, may I ask, did he never try this on a PC? With today's fast hard drives, this could probably be done. >> That is what has been reported. There used to be a link to an >> interview with Gates on the subject, but a fresh look through my >> various Model 100 bookmarks fails to turn it up, though I read it >> not much over a year ago. > >http://innovate.si.edu/history/gates/gates35.htm > >-- Doug > > ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com

27 years, 10 months

1
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Books for DEC-heads

by jimw＠agora.rdrop.com

At 06:01 PM 9/19/98 -0500, you wrote: >Lucky me. I went home with a box of old DEC paperbacks today. A nice >assortment of PDP-8, PDP-11 and VAX titles. I don't do DEC (I remember >cherishing the honor of powering-down our development VAXen for the last >time), but the books are small, so I plan to get them all signed by Gordon >Bell at VCF next weekend and stash them away for 100 years or so. > >Except for one. This one is not only rare, but seems to be full of useful >info: VAX-11/750 Level II Student Workbork (For Internal Use Only). This >looks like it would be great for somebody who wants a pretty deep >understanding of the VAX architecture, including microcode, the WCS, >unibus, the works. I'm not good at estimating page count, but it's >double-sided 8.5x11x2". If some DEC-head could use this, let me know. >Offer me a trade of, say, your spare Intel MCS-4 manual and it's yours :-) Hmmm... Think I'd like to have that one! Wonder if I've got that Intel manual buried somewhere... -jim --- jimw(a)agora.rdrop.com The Computer Garage - http://www.rdrop.com/~jimw Computer Garage Fax - (503) 646-0174

27 years, 10 months

1
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Books for DEC-heads

by mcquiggi＠sfu.ca

Hi Doug: Another thought might be to post a list of the titles, and lend for scanning purposes a copy of any titles not already available on the net. They could then be posted for others reference. There are several titles already on http://highgate.comm.sfu.ca/pdp8, I'm currently scanning DEC's "Introduction to Programming, Volume 1" from 1972. The other scans are courtesy of the efforts of David Gesswein. Congratulations on your haul! Kevin At 06:01 PM 98/09/19 -0500, you wrote: >Lucky me. I went home with a box of old DEC paperbacks today. A nice >assortment of PDP-8, PDP-11 and VAX titles. I don't do DEC (I remember >cherishing the honor of powering-down our development VAXen for the last >time), but the books are small, so I plan to get them all signed by Gordon >Bell at VCF next weekend and stash them away for 100 years or so. > >Except for one. This one is not only rare, but seems to be full of useful >info: VAX-11/750 Level II Student Workbork (For Internal Use Only). This >looks like it would be great for somebody who wants a pretty deep >understanding of the VAX architecture, including microcode, the WCS, >unibus, the works. I'm not good at estimating page count, but it's >double-sided 8.5x11x2". If some DEC-head could use this, let me know. >Offer me a trade of, say, your spare Intel MCS-4 manual and it's yours :-) > >-- Doug > > > --- Kevin McQuiggin VE7ZD mcquiggi(a)sfu.ca

27 years, 10 months

2
1
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Kids these days

by maxeskin＠hotmail.com

So, why are they so expensive then? > >> I'm only 15... I had a few plans for a few things, but the only problem is >> that I need to find an EPROM programmer and some old chips. Any idea where >> to get one - cheap?? > >You might get an old EPROM programmer at a Radio rally/hamfest. But >they're often not that cheap. How about buildign one for your next >project - to program standard EPROMs (2764s - 27512s, say) is not that >hard. Basically you have to set up the address and data, take one of the >pins (Vpp) up to 12.5V (or 21V, or even 25V on older devices) and then >apply a 50ms program pulse to another pin. And repeat for all the >locations you want to program. > >When i built my first embedded control system I had to build an EPROM >programmer first.... > >-tony > > ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com

27 years, 10 months

2
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Does Bill Gates know how to program?

by thomas100＠home.com

Hi, I've heard many times that he did the BASIC for the Trs-80 Model 100. At that time I think Microsoft put out pretty respectable product [I thought so anyway]. Perhaps it makes sense that since he became strictly-management oriented, Microsoft products have been backward, unimaginative and often downright creepy. Well, at least unlike the other Bill, his vices are limited to economic pursuits. I just hope that someday soon they help to modernize computing again. :-( Outside of web browsers and Java, things have been pretty dull for the last couple of years. I would say that that's okay for a maturing industry, but there are so many helpful technologies on the backburner right now that it's just unreal. What was it somebody said? "The popularization of the Internet slammed modern software development back ten years." Or something like that. Thomas

27 years, 10 months

1
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Chuck Peddle?

by dastar＠ncal.verio.com

Rumor has it that Chuck Peddle of 6502 and Commodore PET fame will be found walking the halls of VCF 2.0. Sam Alternate e-mail: dastar(a)siconic.com ------------------------------------------------------------------------------- Ever onward. September 26 & 27...Vintage Computer Festival 2.0 See http://www.vintage.org/vcf for details! [Last web site update: 09/12/98]

27 years, 10 months

2
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GUIs 'forced' on people (was Re: Here's something to consider.)

by allisonp＠world.std.com

< If you have free reign and unlimited budget, what you're doing is *NOT* < engineering. Ah, gak another generalization. It does take out the challenge though. < Good engineers want to ship a product that customers will actually use; < the greatest satisfaction an engineer ever has is seeing or hearing < customers use the product. While it is an ego boost to hear customers !You bet! ;) I've done a few. < praise the product, most of the best engineering goes completely unnotic < When was the last time you drove across a bridge and thought "Wow, the < engineers did an awesome job on this bridge."? (At most, people might t < "Wow, this is a pretty bridge.") What people notice is that gee it does save me 20 minutes getting there. A few will notice it as something to look at like Golden Gate or the Verizanio Narrows Bridge. < Any bozo with a EE degree could have built a computer roughly comparabl < in capabilities to the Apple II using many hundreds of chips and costin < thousands of dollars. A good engineer could have done it with few enou < chips to make it affordable. An excellent engineer did it with almost < no chips, and made it not just affordable but also elegant. Ford would < have been proud to see it. Go back to Good, Fast, Cheap. Innovation is the product of careful compromize. I'm also a pilot and In aeronautical engineering given 100hp engine of nominal weight you can make a fast bird that can't carry anything or a very slow one that can and everything inbetween. Somethings however are not possible despite innovations in materials. Allison

27 years, 10 months

1
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CP/M definition

by dastar＠ncal.verio.com

This is from the CP/M FAQ: Q3: Does CP/M stand for anything? A: (Don Kirkpatrick) There are at least three popular answers - Control Program for Microcomputers, Control Program for Microprocessors, and Control Program/Monitor. The issue is clouded by authors of popular CP/M books giving different answers. According to Gary Kildall (the author of CP/M), in response to a direct question on the PBS show "The Computer Chronicles" following Computer Bowl I, the answer is: Control Program for Microcomputers. This is also consistent with DRI documentation. See, for example, p. 4 of the DRI TEX manual. If this is true then someone is lying (perhaps even Kildall himself). Sam Alternate e-mail: dastar(a)siconic.com ------------------------------------------------------------------------------- Ever onward. September 26 & 27...Vintage Computer Festival 2.0 See http://www.vintage.org/vcf for details! [Last web site update: 09/12/98]

27 years, 10 months

2
1
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Kids these days

by roblwill＠usaor.net

> > Keep scouring those ham fests or swap meets. Check the web for the one > nearest you. If its too far away, convince Dad or Mom to take you by > mowing the lawn and cleaning up your room like you're told :) That doesn't always work. luckily, there's one every year pretty nearby. That's where I got my Tandy 1000 with 4 LPT ports (I don't know how they all work, but they do, and I'm not gonna touch 'em). I was planning on using it as the controller, and hooking up printer guts and making it work by sending line feeds and spaces, and things like through BASIC. -- -Jason (roblwill(a)usaor.net) ICQ#-1730318

27 years, 10 months

4
4
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Need to bring up a power supply

by dastar＠ncal.verio.com

I don't have a variac or anything and don't have the time or money to get one, but I need to bring up an IMSAI power supply that probably hasn't been powered in over a decade perhaps. What can I do to warm up the caps and transformer before bringing it fully online? Anything? Sam Alternate e-mail: dastar(a)siconic.com ------------------------------------------------------------------------------- Ever onward. September 26 & 27...Vintage Computer Festival 2.0 See http://www.vintage.org/vcf for details! [Last web site update: 09/12/98]

27 years, 10 months

3
2
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Transformer

by maxeskin＠hotmail.com

As you yourself said, the C128 logic board requires 9vac. But why is this cheap one harmful for electronics? >> >> >> I looked in Radio Shack, at some step-down transformers for 'traveling >> abroad'. There is a price range, with some 'for heating appliances >> only' (the cheapest) and the higher priced ones allow motors, and >> the $34 ones allow electronic devices. What is the difference among >> these units? Also, could a transformer such as in these theoretically >> be reversed and used for step-up purposes? > >The very cheap one ('for heating appliances only') is probably a triac >circuit. Like a lamp dimmer fixed at half-brightness. And that one can't >step up, of course. Don't use that for anything but heaters/lamps. I've >seen the result of plugging a Mac+ into one of those, and it wasn't >pretty. It took me a long time to rebuild the analgoue board. If the >owner had asked me what to do in the first place, I'd have simply cut the >link... > >The true transformers can be used as a step-up unit. But owing to losses, >etc, you may not get the output voltage that you expect (it will, in >general, be lower than you'd expect). But it should work. > >You may find it's cheaper to buy a bare transformer and add the >case/connectors yourself. > >BTW, another trick which I hesitate to mention because it can casue >damage is the following. If you _know_ it's a switch-mode PSU, and that >the first thing it does is rectify the mains, and there's no >line-frequency transformer to provide a startup voltage, then it'll run >on DC, right. So give it DC at peak voltage of the 220V mains it's >expecting - i.e. at twice the peak voltage of the local mains. Make an >external voltage doubler to do this. > >I don't want to give more details, because IMHO if you can't work it >out from that, then you probably shouldn't be doing it. Even if you do >know what to do, examine the PSU carefully to make sure there's _nothing_ >that depends on an AC input. > >-tony > > ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com

27 years, 10 months

2
1
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Warming up an IMSAI P/S

by CLASSICCMP＠timaxp.trailing-edge.com

>A note in defence of the much maligned Altair while on this subject... >May I point out the the Altair 'B' series machines were one of the first to >provide a main transformer with a multi-tap primary to allow for adjusting >for varying loads and local AC supply. And by this point in time ferroresonant transformers were also being dropped in by folks who weren't happy with the original supply, either. Having used a large variety of S-100 boxes, far and away my favorite power supplies are ones with ferroresonant transformers. Tim.

27 years, 10 months

3
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High density disks on double density drives

by dlw＠trailingedge.com

I've heard that you shouldn't use high density disks in double density drives, that the data wouldn't be reliable. Well, I just bought a bunch of double density 3.5" disks to use with my Apple //gs and I got to thinking about this. Is it because of the drive or the controller? I would think it was the drive, if so, I have the Apple SuperDrive which can read/write high density disks except I don't have the SuperDrive controller for the //gs. Thus I'm stuck with the 800k format. Could I still use high density disks in this drive without problems? Thanks. ----- David Williams - Computer Packrat dlw(a)trailingedge.com http://www.trailingedge.com

27 years, 10 months

3
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GUIs 'forced' on people (was Re: Here's something to consider.)

by allisonp＠world.std.com

< One of the goals of the Apple I was to create a low cost machine. < < Basically I just wanted to give an apple example that not all engineers < all of the time, want to built the biggest, and most expensive things. < That is a bad generalization. It indeed is a bad generalization. As an engiener myself I found it annoying but let it pass. Actually the rules are simple. Good, Fast, Cheap... Pick any two. Enginering is about compromize, tradeoff and innovation. For a given product there are often many ways to implement but more often than not considerations at higher levels may dictate which are the best ways to go. They are not always bad either. If your corperate strategy is fault tolerence the hardware is likely not have extra bits, redundancy and other things needed to make that happen. That can and is more costly. On the other hand if you making really low cost means something else takes precedent. Some thins are a surprize to the uninitiated. For example fewer chips fewer interconnections and connectors often means lower cost and to most people surprize higher realiability. So the idea of Good, Fast and Cheap is not as obvious as first stated. Allison

27 years, 10 months

3
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Warming up an IMSAI P/S

by CLASSICCMP＠timaxp.trailing-edge.com

>Tim wrote: >> And by this point in time ferroresonant transformers were also being >> dropped in by folks who weren't happy with the original supply, either. >> Having used a large variety of S-100 boxes, far and away my favorite >> power supplies are ones with ferroresonant transformers. >I've been told that one shouldn't plug anything using a ferroresonant >transformer into a UPS. Perhaps someone who knows more about the >characteristics of ferroresonant transformers (and UPSes) can explain why, >or refute the claim. Ferroresonant transformers really really want sine waves as input. Many UPS's put out square waves, or slightly shaped square waves. There are many high-frequency harmonics in a square wave, and these disrupt the careful LC-resonance-at-saturation regulation mechanism. Not only do ferroresonant transformers want sine waves, they want sine waves of a specific frequency. I've never tried running a 60Hz unit at 50Hz, but I do know from hard experience what happens at 400 Hz :-(. There are UPS's that do put out nice sine waves, but these aren't all that commonly found. >(*) The only modern thing, anyhow. Did DEC use ferroresonant transformers in >any of their machines? DEC computers from 1970 onwards typically used switching supplies for all high-current supplies, though there are usually some low-current supplies with linear regulators. (There are some exceptions, such as the "large" 8/E using a linear supply while the "small" 8/F used a switching supply)... DEC did sell ferroresonant line conditioners (some of them quite large; one that I passed by took 440VAC 3-phase in and had about 70 15 amp circuits out), but these came before the computer. -- Tim Shoppa Email: shoppa(a)trailing-edge.com Trailing Edge Technology Voice: 301-767-5917 7328 Bradley Blvd Fax: 301-767-5927 Bethesda, MD, USA 20817

27 years, 10 months

1
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Someone was looking for DOS 1?

by cdrmool＠interlog.com

I may be mixing up lists here (must get that procmail filter setup) but I think someone was looking for a copy of Dos (MS) ver 1 or 1.1. If so let me know, I have a disk image of most old versions of IBM/MS dos stored away. Its useless on a hard disk system though as it has no support for them. Just let me know... Colan

27 years, 10 months

2
1
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Kids these days

by maxeskin＠hotmail.com

But what about the metal parts? Those aren't any cheaper...but you're giving me ideas. I saw a show once on CNN about a guy at Lawrence Livermore who is building robot bugs out of computer parts. They are powered by neural networks. He can even pull off a couple of legs and they'll still work. BTW, where do all of those researchers get neural network chips? > >I remember when I was a kid I was dreaming about building robots and using >computers to control them, but all the parts and expecially the computers >were too expensive. I had one design based on a //c, but this was around >1986 when the //c was still relatively new. > >Today, a kid could go to a thrift store and buy all manner of salvageable >computer parts, including printers (to get the steppers and gears out of), >disk drives (for the motors and gear shafts) and of course the computers >to control their projects with easy to use languages built in, all for >just a few bucks. > >An entire robot could be built for under $100 with thrift store and flea >market parts. It could include a fairly powerful and easy to program >"brain" in the form of a Commodore 64, a Tandy CoCo, even an Apple ][ >board. This stuff is everywhere and extremely simple to hack. > >Man, I wish I was a kid again! > >Sam Alternate e-mail: dastar(a)siconic.com >------------------------------------------------------------------------------- >Ever onward. > > September 26 & 27...Vintage Computer Festival 2.0 > See http://www.vintage.org/vcf for details! > [Last web site update: 09/12/98] > > ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com

27 years, 10 months

7
7
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Somebody ought to grab this!

by bobstek＠ix13.ix.netcom.com

I just saw this posting - a free Fortune 32:16 in Utah! >I have this old, but functional, Fortune 32:16 computer system that >I'm trying to get rid of. I hate throwing away working hardware, so I >wanted to see if someone else could give it a good home before I'm >forced to dispose of it by other means. > >Details at http://www.xmission.com/~skb/fortune.html (I want it but my wife would kill me.) Bob Stek bobstek(a)ix.netcom.com Saver of lost SOLs

27 years, 10 months

1
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new interesting addition

by SUPRDAVE＠aol.com

installing the mathco will wont speed up anything EXCEPT for programs that USE it. i bought an xt that had a 16 bit vga card in it. i dont know if every 16 bit vga card works in an 8bit slot, but i guess it's worth a try anyway. david In a message dated 98-09-18 21:14:47 EDT, you write: << I've got an Intel Inboard card, but mounted in a 5150 with a Plus hardcard. I've also been searching for the piggyback with no luck so far. Would adding a 387 co-processer speed applications up significantly ? I'm also on the lookout for an 8-bit VGA card for this set-up. I have a 16-bit card with a switch for either 9 or 15 pin connectors. I don't suppose this would work in the 8-bit 5150 would it ? I know some 16-bit cards will work in an 8-bit. ciao larry >>

27 years, 10 months

3
2
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AS400 RPG books needed

by rhblake＠bbtel.com

I'm going to have to refresh and improve my programming skills in RPG (not role playing games RPG) for the IBM AS400 system and am in search of good books on general RPG as well as RPG400 specific programming, >from a basic level to mid/advanced. Haven't even programmed in RPG in 6 or 7 yrs so I need to go way back to the beginnings. ___________________________________________________ Russ Blakeman, aka "Pooter Fixer" Email: rhblake(a)bbtel.com or rhblake(a)bigfoot.com Website: http://members.xoom.com/pooterfixer/ ___________________________________________________

27 years, 10 months

1
0
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Kids these days

by roblwill＠usaor.net

> > That doesn't always work. luckily, there's one every year pretty nearby. > > That's where I got my Tandy 1000 with 4 LPT ports (I don't know how they > > all work, but they do, and I'm not gonna touch 'em). I was planning on > > using it as the controller, and hooking up printer guts and making it work > > by sending line feeds and spaces, and things like through BASIC. > > If you go to Doug Jones' page at the University of Iowa: > > http://www.cs.uiowa.edu/~djones > > he has a link to some documentation and source code for gutting out > floppy drives so that you can control the stepper and spin the drive > motor. The link doesn't work. -- -Jason (roblwill(a)usaor.net) ICQ#-1730318

27 years, 10 months

3
2
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Need to bring up a power supply

by CLASSICCMP＠timaxp.trailing-edge.com

>I don't have a variac or anything and don't have the time or money to get >one, but I need to bring up an IMSAI power supply that probably hasn't >been powered in over a decade perhaps. What can I do to warm up the caps >and transformer before bringing it fully online? Anything? The "poor man's" substitute for a variac has always been a 120V light bulb in series with the AC. For something like an unloaded IMSAI power supply, a small (15W or so) bulb might be best for starters. That said, the capacitors are standard off-the-shelf items, and if you do blow 'em up, just put in some new ones. -- Tim Shoppa Email: shoppa(a)trailing-edge.com Trailing Edge Technology Voice: 301-767-5917 7328 Bradley Blvd Fax: 301-767-5927 Bethesda, MD, USA 20817

27 years, 10 months

2
1
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Does Bill Gates know how to program?

by allisonp＠world.std.com

< I've got a question I've been meaning to ask for a long time. Does Bill < Gates know how to program? If my memory serves me correct he knew how t < progam in BASIC back in the late 70's, his buddy Paul Allen knew machin < language. No, he knew how to code asm for a BASIC interpreter. I don't know when he stopped coding but many say the basic and OS used in the tandy 100 was the last effort he had a direct hand in. Allison

27 years, 10 months

1
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Warming up an IMSAI P/S

by allisonp＠world.std.com

< And by this point in time ferroresonant transformers were also being < dropped in by folks who weren't happy with the original supply, either. < Having used a large variety of S-100 boxes, far and away my favorite < power supplies are ones with ferroresonant transformers. Compupro and ECT come to mind... I have both and they are really well engineerd bent metal. Allison

27 years, 10 months

1
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Need to bring up a power supply

by allisonp＠world.std.com

< I don't have a variac or anything and don't have the time or money to ge < one, but I need to bring up an IMSAI power supply that probably hasn't < been powered in over a decade perhaps. What can I do to warm up the cap < and transformer before bringing it fully online? Anything? Try a 100W light bulb in SERIES. It will limit the inrush current and if there is a short it will absorb the load. Allison

27 years, 10 months

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Does Bill Gates know how to program?

by fauradon＠pclink.com

Boy! You're starting a religious war here. Most of us are not fans of the guy. Here is my cent and a half (I wouldn't give two cents for Bill Gates): He is too buisy learning monopolistic laws to be bothered with programming. If he was still in the coding arena Visual C++ probably would not be the way it is today and the MFC would probably make sense too. That is IF he was programming AND was interested in it. I guess he's more on the design and what he calls innovation (plagiarism), he says let's do that and there are 2000 employees jumping on it. So my answer is he probably forgot what code looks like. Francois ------------------------------------------------------------- Visit the desperately in need of update Sanctuary at: http://www.pclink.com/fauradon -----Original Message----- From: oajones <oajones(a)bright.net> To: Discussion re-collecting of classic computers <classiccmp(a)u.washington.edu> Date: Saturday, September 19, 1998 7:09 AM Subject: Does Bill Gates know how to program? >I've got a question I've been meaning to ask for a long time. Does Bill >Gates know how to program? If my memory serves me correct he knew how to >progam in BASIC back in the late 70's, his buddy Paul Allen knew machine >language. >-- >Computing since 1982, VIC-20, CoCo, PC, CP/M >Amateur Radio since 1971, WN8JEF, KA6EXR, N8BGR, AA4ZI >http://www.bright.net/~oajones >Rev. O. Alan Jones >

27 years, 10 months

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Does Bill Gates know how to program?

by oajones＠bright.net

I've got a question I've been meaning to ask for a long time. Does Bill Gates know how to program? If my memory serves me correct he knew how to progam in BASIC back in the late 70's, his buddy Paul Allen knew machine language. -- Computing since 1982, VIC-20, CoCo, PC, CP/M Amateur Radio since 1971, WN8JEF, KA6EXR, N8BGR, AA4ZI http://www.bright.net/~oajones Rev. O. Alan Jones

27 years, 10 months

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XPOST-converting CDC7600 format to IBM/APPLE/ETC

by rhblake＠bbtel.com

If anyone can help this guy out, contact him directly: Jim Apple <jma150(a)psu.edu> University Park, PA USA - Friday, September 18, 1998 at 14:22:32 OKay, I'm quite desperate, so maybe someone out there is old (or smart) enough to help me out here. I have some old binary files that I need to open up on a present day system (PC,mac,unix). Here's the kicker, these files were originally encoded on the old CDC7600 mainframe computers. Yes, theyre that old. Anyway, I've tried numerous encoders/decoders, and notthing has worked. So, I'm shopping for new and wonderful ideas. So, if you have any clue about this, or if you can point me in the right direction, I'd greatly appreciate it. Thank you much. --jimi ps. please email me directly if possible at jma150(a)psu.edu

27 years, 10 months

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CP/M-86 / MSDOS / DRDOS / GEM / Windows

by jolminkh＠nsw.bigpond.net.au

Phil Clayton wrote: >I really would love to get even just a copy of DOS Ver 1.0, OK! I'll >settly for Ver 1.1 DOS.. I have an old XT thats is needs it really bad.. >I'll send ya a return postage paid diskette mailer for a copy, can >anyone help ? If you plan to install it on your XT's hard drive, forget it. Ver 1.1 didn't support hard drives. > >I also have a copy someone gave me of Windows Ver 1.0 , have never tried >it yet.. >Has anyone seen this yet ? I have an old 386 set up with a boot manager and three different GUI's on different partitions. GEM 1.2, Windows 1.02 and IBM's Topview 1.01. Topview is the oldest with files dated March 1985 and the most primitive looking. GEM is the best looking and most usable. Looks similar to an early Mac. Dated September 1985. Windows looks a little untidy with garish default colors. These files are dated January 1986. I have them all set up to run in EGA. The only one that gave any trouble installing was Topview, which didn't work properly until I found a 1986 mouse driver. Regards, Hans

27 years, 10 months

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Source for Fuzzball?

by mbg＠world.std.com

27 years, 10 months

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Warming up an IMSAI P/S

by ddameron＠earthlink.net

At 10:19 PM 9/18/98 -0500, Wirehead wrote: > >> I measured the voltages across a power connector and got 9.4V, +17.56 and >> -17.86. A little high but I attribute that to a lack of a load. > >Actually, I think most power supplies in S100 mainframes tend to run a >bit high so they can handle the load and because it doesn't matter since >each board has it's own regulators anyway. > >Anthony Clifton - Wirehead > On some (static memory and other) cards the linear regulators get quite hot with the high input voltages. Doesn't help here that the 117 Volts is sometimes 122 Volts or higher. For these systems I run them with a 12V transformer wired as a 120 to 108V step down (buck) autotransformer. I first tried with a variac to see how low the voltage can go, usually below 100V with supplies with a lot of "margin", such as many of those open frame linear supplies. It also helped a Heath H-19 terminal which also has a linear power supply. A slightly related matter, I found that some XT motherboards can run on only 5 volts, using a 1.44 floppy. I did this many years ago using a 12 Volt battery directly as input to a 5V regulator as power supply. Not very noteworthly now with all the portables. -Dave

27 years, 10 months

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GUIs 'forced' on people (was Re: Here's something to consider.)

by kozmik＠wave.home.com

On Fri, 18 Sep 1998 13:36:06 -0700 (PDT) Sam Ismail <dastar(a)ncal.verio.com> wrote: > Woz designed the Apple 1 with the goal of using as few chips as possible > because for him it was a mental exercise. He mentions this time and again > in numerous interviews. Having it inexpensive to replicate was a > by-product. That isn't true. If you re-read those interviews. You'll read how he spent most of his time going through catalogues finding the cheapest chips first, then deciding what kind of machine he could best make from those chips. One of the goals of the Apple I was to create a low cost machine. Basically I just wanted to give an apple example that not all engineers, all of the time, want to built the biggest, and most expensive things. That is a bad generalization. -- ============================================================--------- Dominique Cormann Email:kozmik@wave.home.com Posted with Becky 1.24 --> http://www.rimarts.co.jp/becky.htm

27 years, 10 months

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Warming up an IMSAI P/S

by dastar＠ncal.verio.com

Ok, so I have a 15W bulb in series with the P/S and it lit up. The fan didn't start blowing until the second time I powered up, but its blowing, albeit very slowly due to the limited power I assume. I didn't go the full Tony route because doing so would've required desoldering the entire transformer which wasn't an attractive prospect. I measured the voltages across a power connector and got 9.4V, +17.56 and -17.86. A little high but I attribute that to a lack of a load. At this point I feel pretty comfortable that the P/S is working pretty well, which surprised me. I expected a fight (but was hoping for the results I got). These old machines just refuse to die. I'm going to let it warm up for about an hour before I start plugging in boards. Thanks to Dave, Tony and Tim for your help!! Sam Alternate e-mail: dastar(a)siconic.com ------------------------------------------------------------------------------- Ever onward. September 26 & 27...Vintage Computer Festival 2.0 See http://www.vintage.org/vcf for details! [Last web site update: 09/12/98]

27 years, 10 months

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LEGO MINDSTORMS Robotics Invention System Now Shipping (fwd)

by spc＠armigeron.com

With all the talk recently about kids, robots and computers, I have to pass this along (sorry about the length): It was thus said that the Great LEGO MINDSTORMS News once stated: > > Retailers Brace for Overwhelming Consumer Demand for > LEGO(reg) MINDSTORMS(tm) Robotics Invention System(tm) > > The very first units of the LEGO MINDSTORMS Robotics Invention System > arrived on U.S. retail store shelves in limited quantities during the first > week of September. Since the Robotics Invention System previewed at the > American International Toy Fair, the Nurnberg International Toy Fair, and > the British International Toy & Hobby Fair last February, the buzz over the > first consumer robotics product that can actually react to its environment > has been gaining more momentum than even the LEGO Company expected. > > To date LEGO MINDSTORMS has received over 100,000 inquiries about its new > Robotics Invention System, half of those from enthusiastic LEGO fans who > registered online for a chance to be one of only 200 product beta testers. > With just 12,000 units made available for the initial shipment, and only > 75,000 additional units to be shipped through the end of the year, LEGO > MINDSTORMS is anticipating a run on the Robotics Invention System that will > quickly empty store shelves. It is expected to be one of the hottest > products of the holiday buying season. > > "LEGO MINDSTORMS has packaged high-tech, creativity and fun into a new form > that represents a whole new direction for toys," commented Terri Bartlett, > Communications Director for Toy Manufacturers of America, Inc., the > industry association. "I don't expect to see any LEGO MINDSTORMS sets left > on retail shelves after the holidays." > > "The clamor for our new LEGO MINDSTORMS robots is far beyond even our > expectations. Thousands of LEGO lovers of all ages have sent us requests to > be the first to own the Robotics Invention System. We are already > redoubling our efforts to produce enough product to handle the demand," > added Linda Dalton, Director, LEGO MINDSTORMS. > > > PRODUCT AVAILABILITY: > > In 1998, LEGO MINDSTORMS will be available for sale in the United States, > Canada, and the United Kingdom. > > > United States: LEGO MINDSTORMS will be available on or before October 1 at > the following retail stores: select Discovery Channel Stores, FAO Schwarz, > Fry's, Learningsmith, LEGO Imagination Centers (at Mall of America and > Downtown Disney), Media Play, select Noodle Kidoodle, select Target (from > November 1), Toys "R" Us, and Zany Brainy. Some stores have reported that > they are already sold out of initial inventories. > > It is also available in the following catalogs: TigerDirect, Hammacher > Schlemmer, FAO Schwarz, and The Robot Store Catalog. LEGO MINDSTORMS can > also be purchased through LEGO Shop at Home at (800) 453-4652 and (800) > 835-4386. > > > Canada: In Canada, LEGO MINDSTORMS will be available at Toys "R" Us and > through the Sears catalog. Product should be available at retail by October > 6. > > > United Kingdom: To find out more about your local UK stockist, please call > our UK information line on 0845 606 2043. > > > Other English-speaking Countries: In 1999 the English versions of LEGO > MINDSTORMS products will be launched in the following countries: Australia, > Hong Kong, Korea, New Zealand, Singapore, South Africa, and Taiwan. > > > Other language versions: In late 1999 we hope to launch localized versions > in the following languages: German, French, Spanish, Italian, Dutch, > Swedish, Danish, Finnish and Norwegian. > > > Internet Sales: We are working on providing Internet sales. Further > details to come. > > > > Thank you for your interest. > > The LEGO MINDSTORMS team >

27 years, 10 months

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Kids these days

by dastar＠ncal.verio.com

I was just thinking about how kids these days are so damn lucky. They've got all this cheap, extraodinarily useful computer hardware sitting around in massive quantities that they can do all sorts of killer things with. I remember when I was a kid I was dreaming about building robots and using computers to control them, but all the parts and expecially the computers were too expensive. I had one design based on a //c, but this was around 1986 when the //c was still relatively new. Today, a kid could go to a thrift store and buy all manner of salvageable computer parts, including printers (to get the steppers and gears out of), disk drives (for the motors and gear shafts) and of course the computers to control their projects with easy to use languages built in, all for just a few bucks. An entire robot could be built for under $100 with thrift store and flea market parts. It could include a fairly powerful and easy to program "brain" in the form of a Commodore 64, a Tandy CoCo, even an Apple ][ board. This stuff is everywhere and extremely simple to hack. Man, I wish I was a kid again! Sam Alternate e-mail: dastar(a)siconic.com ------------------------------------------------------------------------------- Ever onward. September 26 & 27...Vintage Computer Festival 2.0 See http://www.vintage.org/vcf for details! [Last web site update: 09/12/98]

27 years, 10 months

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CP/M-86 / MSDOS / DRDOS / GEM / Windows

by jeff.kaneko＠juno.com

OKay, for 2000 bonus points and the game, what was Micrografx Designer when it was first released under windows 1.X? (this is on topic as that was more than ten years ago). On Fri, 18 Sep 1998 19:09:48 -0400 "Albert J. McCann, Jr." <amc358(a)interserv.com> writes: >> On Friday, September 18, 1998 3:42 AM, >> CLASSICCMP-owner(a)u.washington.edu >> wrote: > >> >client was a stand-alone GEOS app. I know there were stand-alone >Win >> >apps, but I can't remember any names. > >> The only one I've ever seen was the game "Balance of Power". >> It's Windows 1.x > >Micrografx Designer was another. It ran a stand alone 2.x Windows. > >Al McCann > _____________________________________________________________________ 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 Or call Juno at (800) 654-JUNO [654-5866]

27 years, 10 months

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Kids these days

by jpl15＠netcom.com

Slightly off-topic, yet topical... I have, over the years taught many ham-radio license classes to hundreds of people, a good percentage of them kids, generally from age 10-11 and up. Apart from the required information relevant to the actual FCC questions.. I stress science, technology, and D-I-Y projects.. from the simplest 555-based LED flasher to working radio sets and computer interfacing. I go to ham radio swap meets and buy up all the old scopes and meters I can find, and then make them available to kids for the price of promising to *use* the gear. I like to use junk printers for robot supplies, because the control and drive electronics are already there, as well as an easy way of making them move via print commands sent to a parallel or serial port of any computer. Sam and those of you who are robot aficianados... I have seem some pretty fancy devices made up of the steppers and servos from old unwanted printers... especially the big old wide carriage dot-matrix units from 10 or more years ago, whose motors were big and pwerful. And there are a few young scientists left out there, in and among the Beavis And Butthead clones thronging our schools. Sigh. Don't get me started.... Cheers John

27 years, 10 months

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Need to bring up a power supply

by ddameron＠earthlink.net

At 04:51 PM 9/18/98 -0700, Sam wrote: > >I don't have a variac or anything and don't have the time or money to get >one, but I need to bring up an IMSAI power supply that probably hasn't >been powered in over a decade perhaps. What can I do to warm up the caps >and transformer before bringing it fully online? Anything? > >Sam Alternate e-mail: dastar(a)siconic.com Connect a light bulb in series with the 120 volt line and power supply. Say 60 watts. The large caps you can estimate their capacity by seeing how long they will light a small lamp after the supply is turned off. (12 Volts for the +8Volt line, 24V for the +/-18 volt). Or you can time the discharge from the bleeder resistors. -Dave

27 years, 10 months

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Kids these days

by fauradon＠pclink.com

What's keeping you? I had the same wishes when I was a kid and somehow I still have them. Unfortunately they have evolved too: as a kid I wished I had a robot that could stack blocks (whoopee) or one that would run around without bumping in the furnitures (prety advanced). Today I wish I had one that would vacuum when it's needed, pick up the toys the kids leave all around the house, wash my car and changes the cat litter. What I'm getting at is that what we dreamed of as kids is not, by todays standards, dream material anymore: you have those programable cars and all sorts of talking toys (some of them animated) so the novelty and feeling of innovation or creation is not the same. Dreaming of building a robot that can pile blocks or solve the hanoi towers is not quite as fascinating as beating the big bad dude on level four of the latest nintendo game. But I still go and build stuff from spare parts, still keep steppers and gears in neatly ordered cabinets and still dream that one day, when I have the time, I'll build that robot or one of the numerous projects I have recorded in notebooks. In 1994 I started working on one "project" thinking to bring it to market, built a prototype thought of a better way to do it and wanted to make a second proto but it involved much more money than what I had at the time and it got filed with the rest. That is until I saw my idea in a catalog earlier this week. So I fired Quake II and logged on a server and fragged for the rest of the evening. Boy I feel like rambling today. Anyway there is not much that prevents from building the stuff you want, you just need to know what you want and how you want to do it and stick to it. Or did you loose that drive, that desire to build and bring innanimate things to (artificial) life? Francois ------------------------------------------------------------- Visit the desperately in need of update Sanctuary at: http://www.pclink.com/fauradon -----Original Message----- From: Sam Ismail <dastar(a)ncal.verio.com> To: Discussion re-collecting of classic computers <classiccmp(a)u.washington.edu> Date: Friday, September 18, 1998 4:10 PM Subject: Kids these days > >I was just thinking about how kids these days are so damn lucky. They've >got all this cheap, extraodinarily useful computer hardware sitting around >in massive quantities that they can do all sorts of killer things with. > >I remember when I was a kid I was dreaming about building robots and using >computers to control them, but all the parts and expecially the computers >were too expensive. I had one design based on a //c, but this was around >1986 when the //c was still relatively new. > >Today, a kid could go to a thrift store and buy all manner of salvageable >computer parts, including printers (to get the steppers and gears out of), >disk drives (for the motors and gear shafts) and of course the computers >to control their projects with easy to use languages built in, all for >just a few bucks. > >An entire robot could be built for under $100 with thrift store and flea >market parts. It could include a fairly powerful and easy to program >"brain" in the form of a Commodore 64, a Tandy CoCo, even an Apple ][ >board. This stuff is everywhere and extremely simple to hack. > >Man, I wish I was a kid again! > >Sam Alternate e-mail: dastar(a)siconic.com >--------------------------------------------------------------------------- ---- >Ever onward. > > September 26 & 27...Vintage Computer Festival 2.0 > See http://www.vintage.org/vcf for details! > [Last web site update: 09/12/98] >

27 years, 10 months

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Kids these days

by fauradon＠pclink.com

Francois ------------------------------------------------------------- >Sure. But that's what I was getting at. There's so much advanced >tinkering that can be done very cheaply that we didn't have available to >us. I see the lego and K'nex stuff, follow the directions and there you are! >I don't think that's true at all. I think the really creative kids would >much rather build their own robot or program their own computer than sit >on their ass all day and play games. The problem is the atmosphere is >different. Everything is so nicely packaged that you don't need to get >inside your machine and learn about it. I think this needs to change. Exactly, with todays "creative sets" all the creativity is removed and prepackaged: you can buld a dino or a tower of death then you play with it for five minutes and get bored. Then you go back to your nintendo where you still have to figure out the secret of the grotto on level twelve. I'm not against nintendo and the such but they make entertainment easy and readilly available: no looking for parts, no playing with sharp objects or solvent based glue, they are the ideal "babysitters". >> But I still go and build stuff from spare parts, still keep steppers and >> gears in neatly ordered cabinets and still dream that one day, when I have >> the time, I'll build that robot or one of the numerous projects I have >> recorded in notebooks. >Me too. But my parts are all stashed in thrift stores, waiting for me to >pick them up :) I used to build stuff from old recycled materials, a few nails and lots of paint, they were "analog robots" (kid power) >What idea was that? Do a web seach on "Slam Man" >I'm not talking about me. I'm talking about the fun the nerdy kids these >days could be having if they discovered classic computers. Got your point and I aggree but I guess the problem is more the shortage of nerdy kids rather than their lack of imagination. As a classic collector you must have gone to quite a few swapmeets or hamfest. I have not attended one without seeing at least half a dozen kids with caddies or huge backpacks and filling them up with anything marked free. I think they are (the nerdy kids) having a bunch of fun with classics. I can tell you that my kids (I hope they end up like me:) will have lots of stuff available for them to tinker with. >Actually, there is one kid I've been talking to in e-mail (although he's >19 now so "kid" may not be appropriate anymore). He built some sort of >digital logic contraption with relays out of an old elevator controller! >It sounds wild. He said it can do actual useful work, such as image >processing. I don't know the total details, but I'm trying to get him to >exhibit it at the Vintage Computer Festival. He said its very large and >would be a burden to move, but I'm trying to figure out a way to help him >get it to the venue. That sort of project should inspire many people >around his age to embark on similar projects of their own. Please keep pressuring him. I wish I could help local kids in projects and getting they interest on classic computers but there are no programs that deal with that here and it's a real pain to set one up if you don't have an educator's degree. Francois ------------------------------------------------------------- Visit the desperately in need of update Sanctuary at: http://www.pclink.com/fauradon

27 years, 10 months

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Kids these days

by roblwill＠usaor.net

A couple of times, I've used old pie tins. I would make a mold out of something (like packed sand), and hold the pie tin with a tong-thing, and melt it into the mold using a blow torch. It's not the world's best thing, but it works pretty good for making things like wheels. -- -Jason (roblwill(a)usaor.net) ICQ#-1730318 ---------- > From: Sam Ismail <dastar(a)ncal.verio.com> > To: Discussion re-collecting of classic computers <classiccmp(a)u.washington.edu> > Subject: Re: Kids these days > Date: Friday, September 18, 1998 8:16 PM > > On Fri, 18 Sep 1998, Max Eskin wrote: > > > But what about the metal parts? Those aren't any cheaper...but you're > > Metal can be found very cheaply at the big home stores. Also, look > around! Scrap yards, flea markets, etc. You can find many sources for > the raw materials for the framework. > > Sam Alternate e-mail: dastar(a)siconic.com > ---------------------------------------------------------------------------- --- > Ever onward. > > September 26 & 27...Vintage Computer Festival 2.0 > See http://www.vintage.org/vcf for details! > [Last web site update: 09/12/98] >

27 years, 10 months

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Dataproducts interface

by ard＠p850ug1.demon.co.uk

A non-text attachment was scrubbed... Name: not available Type: text Size: 1061 bytes Desc: not available Url : http://www.classiccmp.org/pipermail/cctalk/attachments/19980919/8d54bcd6/at…

27 years, 10 months

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new interesting addition

by maxeskin＠hotmail.com

Did Microsoft actually make the hardware, like this thing and the Softcard? I'm pretty sure that their modern hardware (mice, joysticks talking barney) are licensed from someone else. > >> since im known at work as a packrat of old computer junk, someone gave me >> something called a microsoft <!> mach 20. turns out it's a full length 8 bit >> card that has a 286-8 and 2 meg and high density floppy controller on it. it > >How funny. Back then they didn't have the clout to force computer >manufacturers to make faster hardware to run their slow, bloated >software, so they had to manufacture their own :) > >Sam Alternate e-mail: dastar(a)siconic.com >------------------------------------------------------------------------------- >Ever onward. > > September 26 & 27...Vintage Computer Festival 2.0 > See http://www.vintage.org/vcf for details! > [Last web site update: 09/12/98] > > ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com

27 years, 10 months

2
1
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PDP-8 Core stack

by cmcmanis＠freegate.com

I'm looking for a G104 and G227 cards for a PDP-8 (these are two of the three cards needed for a 4K core stack) Alternatively a complete 4K or 8K core stack would be sufficient :-) --Chuck McManis

27 years, 10 months

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