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

by mcguire＠neurotica.com

On August 24, Adrian Vickers wrote: > >Something which (as you'll come to discover if you hang around on > >classiccmp) I don't care much about. It is certainly well down with > >respect to functionality. > > That's fair enough. Personally, I doubt any of the older computers are > *truly* elegant internally - there was too much learning going on. I'm not > even sure if it's true of modern computers either. > > Of course, you'll prove me wrong now... ;) I dunno about that. In the past 24 hours, I've worked on the innards of an SGI Onyx, an AlphaServer 2100A, and a PDP11/34a. I'll take the 25-year-old PDP11 over any of them, physical design wise. Having seen the inside of a recent PeeCee a few weeks ago, there's NOTHING elegant going on there. Now a Cray T90 (a relatively recent Cray vector supercomputer) with its motorized zero-insertion-force connectors...now THAT'S elegant. But it could afford to be. > However, whilst I like the idea of learning embedded systems, I'll probably > start simple and use a Z80 or similar - I can't (yet) think of anything > where I'd use some super-fast chip. Incidentally, what's with these PIC > chips? They seem to be very popular at the moment. PIC chips kick butt. They're wonderful. I use the CCS C compiler, which is very nice and comes with LOTS of example code in the form of "drivers" for various popular chips (I2C EEPROMs, Dallas Semiconductor serially-interfaced RTC chips, iButtons, etc) that have proven extremely useful. It also directly controls the PicStart programmer as well as a few others. The downside to the CCS C compiler is that it runs under Windoze...not having any (and not wanting any) Windoze crap here, I fired up a copy of VirtualPC on my G4 Mac; it runs nicely under that. There are a LOT of different PIC chips available, from the older 16C54 to the incredibly popular 16F84 (the only one anyone ever hears about, rather stupidly IMO because there are MUCH better ones), to the 16C745 with an on-chip USB interface. -Dave -- Dave McGuire Laurel, MD

24 years, 10 months

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pdp 11/94 available

by dancohoe＠oxford.net

I found two of these at a wreckers in Toronto on Friday. I bought one, but likely the other one will be available for a few hours Monday before it goes down. I didn't see any racks to go with them. If anyone is interested, I could see what I can do. I wouldn't be too difficult to get it to any of Detroit, Buffalo, Syracuse, Ottawa-Montral areas.

24 years, 10 months

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MPP Possibility (Was: Notice)

by ajp166＠bellatlantic.net

>"Bill Sudbrink" <bills(a)adrenaline.com> wrote: >> The University Of Maryland had something called ZMOB or >> Z-MOB in the early 1980s, which (if memory serves) was >> 256 4MHz Z80s, several Megs of bank-switched memory, etc. >> I never got to actually play with it or even see it, >> only heard about it. Frank McConnell may know more. That was an inspired design. I modeled it somewhat with a 4/Z80 S100 crate back in '81. I learned alot about parallelism, process sharing and multi-CPU task building and scheduling. In the end one 16mhz z80 can and will blow the doors off of 4 4/mhz Z80s generally. The complexity of supporting multiple CPUs makes it hard to get significantly improved performance without application tailoring. Allison

24 years, 10 months

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OT: Clueless users, PC labels and color-codes

by acme_ent＠bellsouth.net

Chad Fernandez wrote: > I just went to a local computer show today. I was happy to find that a > few vendors had components available from disassembled computers or > whatever. I picked up a 3com 3C905-TX PCI ethernet card, an ATI Mach64 > video card, and a very nice Sound Blaster 16, all used of course. Keep an eye on the ATI. I've seen lots of cases where they exhibited weird behavior when used with non-Intel-chipset motherboards. > The > Mach64 had "Monitor" written in marker on the slot cover. Do office > people really need to remind themselves where to plug the monitor in? I > have also seen a 3.5" floppy drives marked "hard drive a:" and the 5.25" > floppy, marked, "floppy drive b:". What's the deal? I put printed labels on every system I sell, whether it's one I built, or a used machine I took in on trade. I used to use labels with icons printed on them but too many people didn't understand them. The printed labels cut support calls by at least 50 percent. I still get calls from people who can't figure out how to connect the AC power cable from the system to the wall outlet. All the recent ATX motherboards and expansion cards I've seen use the "Colorful PC99" standard, wherein the VGA port is blue, the audio output is light green, etc., but labels work best. It's always amusing to hear the system box referred to as the "modem" or "hard drive." On dual FDD systems, the 3.5" drive is the "hard drive," since the disks are "hard," not "floppy." About once a month someone comes in asking about buying a "computer with Microsoft on it." I love my customers ;>) Glen 0/0

24 years, 10 months

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CBM 8032 SK (& electronics)

by mcguire＠neurotica.com

On August 27, Adrian Vickers wrote: > >> >You mean you _don't_ write self-modifying code? Odd.... > >> > >> It was drilled into me from a very early age that self-modifying code was A > >> Bad Thing. > > > >As I said, I am not a programmer, so I don't worry about such things. > > :) It plays havoc with your designs.... Imagine a circuit that could > reconfigure itself at will... That's a whole different issue. Sorry, but I have to butt-in here. Self-modifying code is a time-proven technique frequently used by history's most clever programmers. Now in the face of RISC-y things like out-of-order instruction execution and such, it's generally not possible, but on stuff like PDP10/PDP11 machines it was commonly employed with much success. -Dave -- Dave McGuire Laurel, MD

24 years, 10 months

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Room for Collections

by jrice＠texoma.net

On another list, there has been a long thread about SO's and room for the hobby. Does anyone else keep their collection set up and functioning? Does your SO understand? I'm luck in that I have a large room to set mine up. I currently have up and running: NeXT TC slab, 17" Trinitron, laser printer, SCSI box, flatbed scanner Sgi Indy, 20" Trinitron, SCSI box, Lexmark Optra with PS support Sun Sparc 5, 20" Trintron Mac Performa 631CD,DOS board, now just a 15" since the 20" Radius died, StyleWriter 2500, LaserWriter II-NTX, ImageWriter II with LocalTalk board NeXT Cube with Dimension, 17" mono, ext CD rom, laserprinter, soon 21" NeXT Hitachi on the Dimension WinTel machine, 21" Mitsubishi, 19" CTX on Dual Head, Epson AL1000, Epson Stylus 1500, Kurta digitizer, flatbed scanner Commodore 128D, 14" RGB, MPS-803, 2 1571's running CP/M Intel box booting BeOS, 17" monitor Other printers and stuff: Calcomp 1043GT plotter("E" size), Zericon PC3610 plotter ("D" size), HP LJ4si, HP OfficeJet R60, Canon BJC-4550, Canon BJ-230, Tandy DMP-2100, Epson LQ570 (2 of them), Epson AL-1500's (2 of them) This doesn't even count the servers in the closet. I just took down an Amiga 3000 that I'm selling. I also have been selling all of the Apple II's ,Tandys and other machines that I collected. Besides, I don't want to keep a lot of boxes in storage, they need to be used and ran. I've told my wife she is kind of lucky. At least I don't collect mainframes. James http://home.texoma.net/~jrice

24 years, 10 months

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3 chip video output (OT, I guess)

by ard＠p850ug1.demon.co.uk

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24 years, 10 months

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Free: HP Software

by jss＠subatomix.com

Ok, my interests haven't really spread to anything HP, so I'm not sure if this is usable or trash. First thing is a tape cartridge, about 5.5"x4", and it says it is 600' long, has 16 tracks, and is for use with HP 9144A and compatibles. It has the following label: : HP9000 Series 300 and 400 Cart 1 of 1 : HP-UX UPDATE : DONATED TurboVRX and PersonalVRX DEMONSTRATION : Software Contributed from : a variety of sources : p/n 98735-12000 Rev. 1.1 : COPYRIGHT (C) HEWLETT-PACKARD Co., 1990. Does anyone want this? It's yours for the cost of shipping. -- Jeffrey S. Sharp jss(a)subatomix.com

24 years, 10 months

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CBM 8032 SK (& electronics)

by mcguire＠neurotica.com

On August 26, Tony Duell wrote: > Or you can make a 40*25 text display in about 3 chips (all of them > easy to obtain) that will drive the RGB inputs on a normal TV set. What sort of circuit, using which chips, did you have in mind here Tony? I was thinking about the TMS9918, but it requires a bank of 4116s and is hard to find. -Dave -- Dave McGuire Laurel, MD

24 years, 10 months

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AC5954N clock chip (I think)

by ard＠p850ug1.demon.co.uk

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24 years, 10 months

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Just curious about injection molding or casting

by mranalog＠home.com

Tony Duell said: > I've not tried this, but David (? maybe Vincent) Gingery has written a > book on DIY injection moulding. Although the machine descibed will only > do small parts (<10g or so), it would seem it could do switch levers, > etc. I think scaling it up would be difficult, as the mould is not > heated, so the plastic would most likely solidify before the mould was > filled. It's Vince Gingery. I have this book. http://www.lindsaybks.com/dgjp/djgbk/inject/index.html Dave Gingery did the line of foundry books and the 7 book set "Build Your Own Metalworking Shop from Scrap". (Makes me feel like a kid again). All of it is at Lindsay Books http://www.lindsaybks.com/prod/index.html every book you need to rebuild the world after the apocalypse. Regards, --Doug ========================================= Doug Coward @ home in Poulsbo, WA Analog Computer Online Museum and History Center http://www.best.com/~dcoward/analog =========================================

24 years, 10 months

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info for miniscribes 3085

by ve2qcg＠globetrotter.net

Hello ! I am looking for informations about MINISCRIBES MODEL : 3085 Does anybody know its physical parameters (heads, cylinders, sectors)? Thank you ve2qcg(a)globetrotter.net

24 years, 10 months

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MPP Possibility (Was: Notice)

by fmc＠reanimators.org

"Bill Sudbrink" <bills(a)adrenaline.com> wrote: > The University Of Maryland had something called ZMOB or > Z-MOB in the early 1980s, which (if memory serves) was > 256 4MHz Z80s, several Megs of bank-switched memory, etc. > I never got to actually play with it or even see it, > only heard about it. Frank McConnell may know more. IIRC the big deal about ZMOB was that there was a sort of circular ring shifter that was used for message passing between processors. If processsor x wanted to send a message to processor y, processor x would put its message into the currently accessible ring bucket and the bucket's contents would eventually get shifted around to where it was accessible to processor y. I don't think there was any pretense of ZMOB being "super", just "parallel", but that was sufficiently interesting for CS research. But I never worked on it, I think I saw it once (a bunch of boards in rack-mounted cages, in a rack with a door), and I can't remember where I learned about it. Maybe one of the courses I took, maybe a friend who I think did hack on it a bit. -Frank McConnell

24 years, 10 months

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[jjc@mac.com: pdp11 stuff]

by jhfine＠idirect.com

>John Christie wrote: > On Wednesday, August 22, 2001, at 09:50 PM, Jerome Fine wrote: > > I don't know if you want to separate the media, but I can probably help > > you with the RL02 disks. If this is a commercial request (I presume it is > > not), then I could probably arrange to acquire an RK05 drive as well. > This is an academic request. I have 5 RL disks. I have been > informed that they are actually RL01K-DC (??). However, my > understanding is that they both can be read in the same drives. > In order to transfer the data (I am only interested in the text > files) we could just email it or I could set up an ftp account and you > could send it as a TAR archive. The total amount of data shouldn't be > bigger than a large attachment. > I really appreciate your offer. However, I am going to hold off on > accepting it in case someone comes along who really needs the media. > I am not on the PDP mailing list, but if you could update the > description to RL01 disks (5) and even mention that that there are about > 20 of the RK05 I would appreciate it. > Thanks > John Christie <jjc(a)mac.com> Jerome Fine replies: I was asked to replay the message Does anyone have both the RK05 drives and the RL01 drives (NOT RL02 after all)? Sincerely yours, Jerome Fine

24 years, 10 months

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Tek 465 as a hobby scope?

by mcguire＠neurotica.com

On August 26, Dan Linder wrote: > I found a Tektronix 465 o-scope today for $50 - it's missing probes, and > the owner was going to look for the manual, but I'm wondering if this > would be a good scope for hobby purposes? > > The previous owner feels that it probably needs a good cleaning, like some > of the knobs. > > Any insights? The 465 is an *excellent* hobby scope. It was the top-of-the-line (or nearly so) when it was new, and was very pricey. The fact that they're affordable and accessible to hobbyists now, and most still have MANY years of good service life left in them, is a wonderful thing. And $50 is a good deal. I'd say go for it. I used a 475 for a long time, until a few months ago when I replaced it with a 2465A. -Dave -- Dave McGuire Laurel, MD

24 years, 10 months

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Okay, not exactly within timeframe for classic, but...

by dittman＠dittman.net

> >does anyone know how to tell if an I-Opener is of the kind > >which can be hacked? Can one tell from the serial number of > >does the machine physically have to be opened? > > Most of my links are on another computer, but here is a site to get you > started. http://www.linux-hacker.net/ Plus, if you were to look through > the list archives there are probably some other links and info about a year > and a half ago. I was supposed to be getting one, but the company and > Circuit Shi** pulled a fast one on me, so I didn't. The only list member I > know of that actually managed to get one was John Wilson, and I think he > turned it into a PDP-11 (which was what I wanted to do). I bought one from Circuit City and one from CompUSA. The one from Circuit City was sent to my in-laws, and they use is as it was intended. The one >from CompUSA was the demo unit so it was very easy to hack. I turned it into a small Linux box. -- Eric Dittman dittman(a)dittman.net School Zones: Man's attempt to thwart natural selection.

24 years, 10 months

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Fw: Access to an IBM mainframe was Re: CBM 8032 SK (& electronics)

by KenzieM＠sympatico.ca

At 07:40 pm 25/08/2001 +0100, you wrote: More or less what's happening with me now.... Except i don't have a mainframe to play with, or indeed the space to keep a mainframe in.... > Forwarding this from a newsletter I get > ---- > DEVELOPERS: WANT TO TAKE AN IBM MAINFRAME FOR A SPIN? > Does developing Linux software for a mainframe computer sound like fun? > For many Linux advocates, the answer is probably "yes." Do you have a > mainframe handy? Unless you're working for a large company, the answer > is probably "no," and that's worrying IBM. Big Blue is so concerned > that the PC maker has decided to do something about the mainframe > shortage. > > Most open source software is created on inexpensive desktop computer > systems, which isn't surprising, considering the fact that most open > source developers are volunteering their time and don't have scads of > cash for hardware purchases. Recognizing this point, and openly > inviting Linux development for its mainframe systems, IBM has created > the Linux Community Development System (LCDS). > > LCDS provides open source developers with free access to a S/390 > mainframe. The system features a 9672 G6 Model ZX7 processor with 32 GB > of main memory, 2.1 terabytes of auxiliary memory, and a hypervisor > operating system that transparently allocates to each Linux user a > virtual environment that appears to the Linux kernel as a separate > processor and 128 MB of main memory. For more information, visit the > LCDS homepage. > http://www-1.ibm.com/servers/eserver/zseries/os/linux/lcds/ > _______________________________________________ > oclug mailing list > oclug(a)lists.oclug.on.ca > http://www.oclug.on.ca/mailman/listinfo/oclug

24 years, 10 months

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"test" posts

by acme_ent＠bellsouth.net

> From: ysgdhio <ysgdhio(a)yahoo.com> > To: acme_ent(a)bellsouth.net > Subject: Re: another test > Date: Saturday, August 25, 2001 2:02 AM > > Glen Goodwin writes: > > another test > > Is this *really* necessary?! It's pretty damn annoying. Well, my apologies to the group, but I must say that if my you found my grand total of *two* test posts to be "pretty damn annoying" you might want to chill OUT -- RELAX -- get a LIFE. The reason for the tests was simply that for the last week I have only been receiving about 1/3 of the messages posted to the list. I deduced this by the large number of "Re:" posts I received where I did NOT receive the original post. Also, the messages were not in date/time sequential order, and three posts I made during the last week were not received by me. I then posted the original "test" message, and when I didn't receive it, I subscribed using another (this) e-mail account and posted "another test" (which I DID receive). Perhaps everyone's on edge due to the high number of off-topic and inflammatory messages which have been posted lately, but, hey, can't you cut me a little slack while I resolve this problem? After all, it's not as if I called you an ASS or something ;>) Glen 0/0

24 years, 10 months

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Free S-100 stuff, Washington DC area

by CLASSICCMP＠trailing-edge.com

Free S-100 mainframes, generally with power supplies and some random cards and in some cases drives. Located just inside the Washington DC beltway, you-pick-up-only, first-come-first-served: Cromemco System III. If you take this, you also get to take all my Persci 8" drives that fit inside the mainframe. Nice rack-mount box. Cromemco Z2D. 5.25" floppy drive, Z80 CPU, some memory, etc. Very sleek black rack mount box. Cromemco HDD disk memory system, sleek black case to match Z2D. Dynacomp desktop S-100 box with a bunch of cards. Email me (shoppa(a)trailing-edge.com) if interested. Tim.

24 years, 10 months

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Free DEC Pro/Rainbow stuff, Washington DC area

by CLASSICCMP＠trailing-edge.com

Free stuff, just inside the Washington DC beltway. You-haul-away only; no shipping, first-come-first-served. I'm only rarely available during the week; this will probably all have to go by the end of this weekend: DEC Pro 380 w/monochrome monitor DEC LA75 (serial dot-matrix) printer with stand Many DEC Rainbow software kits of various sorts (some rebadged Microsoft stuff) A couple of DEC Pro software kits A cubic foot of DEC Professional technical-type docs As always, when you show up here, I'll try to make you take away some other extra stuff too :-). Please email me (shoppa(a)trailing-edge.com) if interested. Tim.

24 years, 10 months

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Curricula ...

by mbbrutman＠magnaspeed.net

> > I don't know how a student with a four year degree can be called > > a professional programmer. It's only after 17 years of programming > > (with 10 years of professional experience) that I now consider > > myself armed and dangerous. I loved taking graduate classes as an > > older student - it was so easy to crush the competition because of > > the depth of experience and exposure that I had. ;-) > There is one (possibly unintentional) idea here that I disagree with. And > it's that learning starts when you go to university and stops when you > leave (the '4 year degree'). Tony - You are absolutely right, and thanks for giving me the benefit of the doubt and not jumping all over me on it. The part of my education that was "formal" showed me things that I would have never known to explore on my own. The "informal" part is where the experience was developed. Now that I'm older and wiser, I do a lot more of the exploring on my own. Oh, and BTW, I never properly thanked you for the information you shared on the lightpens - I learned a lot out of that discussion. Still haven't gone out to construct a crude one, but at least I have an idea of where to start. (And my soldering skills are going to have to improv significantly.) Mike

24 years, 10 months

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Google wants your Usenet CDs

by jfoust＠threedee.com

>From http://groups.google.com/googlegroups/archive_hunt.html : Help Us Complete the Usenet Archive Google is attempting to compile the most complete archive possible of Usenet posts, and we need help doing it. We are looking for archives pre-dating 1995, in particular the "NetNews CD Series". These CDs were commercially available through Sterling Software and later through CD Publishing Corporation between early 1992 and 1995. The CDs were released separately and each CD covers approximately a two week time span. We've already located NetNews CDs #6 - #31, which cover March 92 through January 93. If you own NetNews CDs or if you know somebody who does, please contact us at groups-support(a)google.com. We will pay a finder's fee for any NetNews CD we do not own already. Thanks for helping us build the most authoritative Usenet archive online. Thanks, The Google Team

24 years, 10 months

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IC identification

by west＠tseinc.com

I know this is listed in my HP docs somewhere, but I can't find what I did with that binder. So.... Anyone know what this is called these days, or if there are any direct substitutes? It's part of a core sense amplifier circuit: 14 pin DIP IC, "RCA 1858-0001" Thanks! Jay West

24 years, 10 months

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Cray EL-98 Supercomputer - 2 units on Ebay

by fernande＠internet1.net

Cray EL-98 Supercomputer - 2 units http://cgi.ebay.com/aw-cgi/eBayISAPI.dll?ViewItem&item=1267985838 Thought this might interest a few of you.... as the are supposed to come with media, manuals and one still has Unicos 9 on the drives! Chad Fernandez Michigan, USA

24 years, 10 months

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Favorite screen capture program for Windows

by rcini＠optonline.net

Hello, all: I'm working on the manual for Altair32 and wanted to know if anyone has a favorite program to capture screenshots. Using the PrtScrn method is clunky. I'm looking for more elegant. Rich Rich Cini Collector of classic computers Build Master for the Altair32 Emulation Project Web site: http://highgate.comm.sfu.ca/~rcini/classiccmp/ /************************************************************/

24 years, 10 months

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another test

by acme_ent＠bellsouth.net

another test

24 years, 10 months

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Looking for Altair loader program

by rcini＠optonline.net

Hello, all: On my continuing quest for Altair stuff, I was wondering if anyone had the code for the 17-byte (I think) paper tape loader program? I'm adding direct support for the loader in the emulator. Thanks. Rich Rich Cini Collector of classic computers Build Master for the Altair32 Emulation Project Web site: http://highgate.comm.sfu.ca/~rcini/classiccmp/ /************************************************************/

24 years, 10 months

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another NeXT question...

by healyzh＠aracnet.com

Since it sounds like there are one or two people new to NeXT getting systems setup right now. Here is a tip. Look for the "Lighthouse" apps. There are free licenses available with them and they'll give you some nice commercial apps to run on your systems. Zane

24 years, 10 months

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another NeXT question...

by mcguire＠neurotica.com

On August 24, Absurdly Obtuse wrote: > Is it impossible to run Sendmail and Procmail on a NeXT? Not at all. -Dave -- Dave McGuire Laurel, MD

24 years, 10 months

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Curricula (was: Assembly vs. Everything Else

by dhquebbeman＠theestopinalgroup.com

> I've been told that LISP stands for Lots of Insane Stupid Parentheses. > But could any language have punctuation more demented than C? APL? -dq

24 years, 10 months

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classiccmp-digest V1 #698

by mtapley＠swri.edu

>From: Jeff Hellige <jhellige(a)earthlink.net> > >...My >question for those that use NeXT machines on the list is: what is a >good POP3/SMTP email client for NeXTStep? PopOver, look on the peanuts or peak archives (mmmm...let's see... http://www.peak.org/next/apps/mail/ and look for PopOver.1.6.... ) It's not really so much of a client as an interface which acts as a client to the POP server, then prensents the mail it picks up to the NeXT Mail program. Pretty easy to set up and use, works pretty well, and gets to the NeXT Mail user interface which is not bad IMHO. Fair warning: I'm still trying to get sendmail to work from my NeXT. I'm doing something wrong, that's for sure. I can only get it to go by forcing the first hop, ie. <@hal.space.swri.edu:destination@destination.com>. I don't think that's got anything to do with PopOver on my system, but it's good evidence that I don't know everything about NeXTs and mail. - Mark

24 years, 10 months

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Looking for Altair loader program

by mranalog＠home.com

"Richard A. Cini, Jr." <rcini(a)optonline.net> said: > Hello, all: > On my continuing quest for Altair stuff, I was wondering if anyone had the > code for the 17-byte (I think) paper tape loader program? > I'm adding direct support for the loader in the emulator. I'm on digest. If no one has answered yet, here goes - From the 4K Basic version 3.2 manual "Getting Started With BASIC" Appendix A. (All values in Octal) * Loading from paper tape and NOT using a REV 0 Serial I/O Board OR using a REV 0 SIO Board on which the update changing the flag bit has been been made. ADDRESS DATA 000 041 001 175 002 037 (For 8K, for 4K use 017) 003 061 004 022 005 000 006 333 007 000 010 017 011 330 012 333 013 001 014 275 015 310 016 055 017 167 020 300 021 351 022 003 023 000 * Loading from paper tape and using a REV 0 Serial I/O Board on which the update changing the flag bit has not been been made. ADDRESS DATA 000 041 001 175 002 037 (For 8K, for 4K use 017) 003 061 004 023 005 000 006 333 007 000 010 346 011 040 012 310 013 333 014 001 015 275 016 310 017 055 020 167 021 300 022 351 023 003 024 000 * Loading from audio cassette ADDRESS DATA 000 041 001 175 (Handwritten crossout of 175 and 256 added)????? 002 037 (For 8K, for 4K use 017) 003 061 004 022 005 000 006 333 007 006 010 017 011 330 012 333 013 007 014 275 015 310 016 055 017 167 020 300 021 351 022 003 023 000 Regards, --Doug ========================================= Doug Coward @ home in Poulsbo, WA Analog Computer Online Museum and History Center http://www.best.com/~dcoward/analog =========================================

24 years, 10 months

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CBM 8032 SK

by pete＠dunnington.u-net.com

On Aug 21, 22:18, Adrian Vickers wrote: > At 01:06 pm 21/08/2001 -0600, you wrote: > >If the CPU's broken, surely you can get that ... > > I expect Farnell carry it (that's where I got the Z80 prices from), but a > quick search on "6502" revealed nothing; but I only did it quickly, so may > have made a mistake. I'm fairly sure 6502s are still available from one of the UK suppliers. > >The ROM's are probably pin-compatible with some flavor of EPROM, and > somebody, > >somewhere, surely has the working ROM's ... > Hmm, possibly. Yes to both parts -- on the 8032, the ROMs can be replaced by Texas 2532 EPROMs (that's from memory but I might be able to look it up), and I have dumps of the ROMs from my 8032 (which I sold a while ago). -- Pete Peter Turnbull Network Manager University of York

24 years, 10 months

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CBM 8032 SK (& electronics)

by mcguire＠neurotica.com

On August 24, Absurdly Obtuse wrote: > > I dunno about that. In the past 24 hours, I've worked on the > > innards of an SGI Onyx, an AlphaServer 2100A, and a PDP11/34a. I'll > > take the 25-year-old PDP11 over any of them, physical design wise. > > I think he might have been referring to older micros, Dave. Ahh, in that case, I agree. 8-) -Dave -- Dave McGuire Laurel, MD

24 years, 10 months

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where to find old ICs ?

by uban＠ubanproductions.com

I am trying to collect a few spares of some old ICs so that I can continue to maintain my older DEC PDP equipment. Last night I diagnosed a bad 74H00 in my PDP 11/45 and when I realized that it was a hard to find component and that it was only going to get more difficult to find, I created a list of parts which I might need and do not have. If anyone has additional information about any of these parts (data sheets for the ROMs, etc.) or information on possible substitutes, it would be appreciated. Also, if you know of a source for these parts, that would be good too. --tnx --tom DM8598-AB ROM DM8598-AC ROM DM8598-AD ROM 3101 256x4 ROM 3101A 256x4 ROM 74187 256x4 ROM 74182-1 look ahead carry generator (fast version ?) 74194 4-bit bidirectional universal shift register 74H01 quad 2-in nand gates w/open collector outputs 74H10 triple 3 input nand gates 74H21 dual 4-in and gates 74H22 dual 4-in nand gates w/open collector outputs 74H30 8-in nand gate 74H40 dual 4-in nand buffers 74H50 dual 2-wide 2-in and-or-invert gates (one gate expandable) 74H74 dual d-type positive edge triggered flip flops w/preset & clear 74S15 triple 3-in and gates w/open collector outputs 74S65 4-2-3-2-in and-or-invert gate w/open collector output 74S74-45 fast version (4.5ns) of 74S74 ? Where these parts made by or for DEC? DEC380 DEC380A DEC8001 DEC8251-1 DEC8815 DEC8815A DEC8875 DEC8881 DEC8885 DEC9318 Also some transistors: DEC4258 transistor DEC30098 transistor

24 years, 10 months

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test

by Glenatacme＠aol.com

test

24 years, 10 months

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Just out of curiosity..

by technos＠nerdland.org

Just out of curiosity, how often do y'all get 'data retreival' requests, where some schmuck tosses you a tape from 1980 and needs the data? Jim

24 years, 10 months

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SemiOT: Mourning for Classic Computing

by mmcfadden＠cmh.edu

Here we go with the language discussion. First I put on the flameproof suit, insert ear plugs, cover eyes with antiflash goggles, and place flack vest on front and back. Are any of the following a computer language? IBM JCL IBM assembler DCL SPSS SAS BMDP C Datatrieve HPGL At some time in my life I have solved problems with all of them. I peek out to see if there is superheated steam in the area and then check Geiger counter for background radiation levels. My only comment is that you should pick the language you like and that can solve your problem. I'm too old to be intolerant. Mike

24 years, 10 months

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Switching PS for S-100 Computer?

by r_beaudry＠hotmail.com

>Date: Wed, 22 Aug 2001 19:44:49 -0400 >From: "ajp166" <ajp166(a)bellatlantic.net> >Subject: Re: Switching PS for S-100 Computer? >From: Rich Beaudry <r_beaudry(a)hotmail.com> >>I would like to ask if any of you know of an existing, available, commercial >>switching power supply that could be used to power an S-100 computer? > >WHY???? The bus voltages for S100 are UNREGULATED. OK ... so how does this change things? If I have an unregulated 8 Volt power supply, and the regulators on the cards regulate that down to 5 V, how is that different from having a regulated SMPS at 8 volts, and still having the regulators drop it down to 5 Volts. Perhaps stupid, but is it technically possible, and will it work without harming the boards? I thought it would be easier to get a modern supply, so I wouldn't have to try to build one... Of course, now that I look at the prices for SMPS.... YIKES! >> realize I could get a +5V and +/- 12V supply >> and just remove the regulation circuitry on the cards >Only if its an old LINEAR supply as SMPS designs mostly will not dot it. I'm not sure what you mean by that.... >The S100 power supply is terminally simple. Three transformers >{8,16, 16 V AC}, three bridge rectifiers and three caps... thats all >folks. Yup, I know ... Try finding a new, "available from a distributor" transformer these days that will handle these voltages and currents, and I will quietly slink off... That's the reason I'm looking for alternatives. I can't find a transformer that will give me the voltages and currents I need. Links to these distributors are welcomed... Rich B.

24 years, 10 months

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classiccmp Jobs?

by mcguire＠neurotica.com

On August 23, Jeffrey S. Sharp wrote: > It's time for me to look for a job. I've been unemployed (voluntarily, > happily so) for a month, and re-establishment of a dependable cash flow is > becoming a top priority. Since I'll be finishing college next May, it's > also time to begin looking for my first post-college position. > > Can a programmer make a career out of classic computing? I dunno...I pick up VMS consulting work from time to time. Of course, it's been on releases of VMS that are merely a few months old, but to the "outside world" anything that's not Windows is "classic" and "obsolete". So YMMV. -Dave -- Dave McGuire Laurel, MD

24 years, 10 months

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Apple II software, system discs, blank disks? Help!!

by CELang＠worldnet.att.net

I phoned my local Radio Shack store. They have 5 1/4" diskettes, double density, three to a package for $1.97. Or I should say they *did* have them. I just cleaned them out. Just amazing the old media Radio Shack has. Diskettes, reel to reel tape, even Beta tapes. If I felt more smart alec I might've asked the clerk if he had any HP 79xx disk cartridges. :) Craig -----Original Message----- From: Sellam Ismail <foo(a)siconic.com> To: classiccmp(a)classiccmp.org <classiccmp(a)classiccmp.org> Date: Thursday, August 23, 2001 3:52 PM Subject: RE: Apple II software, system discs, blank disks? Help!! >On Thu, 23 Aug 2001, Rich Beaudry wrote: > >> As to a source of 5.25" disks, I hate to mention it, but eBay is >> actually good for this. Bargains can actually be had... > >Try thrift stores! You'll find more than you'll ever know what to do >with, and cheap! Sometimes you can find some new in the box with >shrinkwrap even. > >Sellam Ismail Vintage Computer Festival >--------------------------------------------------------------------------- --- >International Man of Intrigue and Danger http://www.vintage.org > >

24 years, 10 months

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2/3 drives (was: TRS80 help needed

by pete＠dunnington.u-net.com

On Aug 23, 10:28, Fred Cisin (XenoSoft) wrote: > Quick simple puzzle: why would a drive that steps both disks at the same > time be significantly SLOWER when DISKCOPY'ing a disk than using separate > drives? > Hint: MUCH faster when copying if you write software specifically for it. Because it will read some number of tracks, stepping inward as it does so, then have to step back to the correct track to start writing. Example: read tracks 0 to 19 (20 in total, 19 steps), step back 19 tracks, write 20 tracks (19 steps again); repeat. Total number of steps to copy n tracks is just less than 3n. If you want to read the tracks back to verify them, life is even worse, as the total is almost 5n. On the other hand, if you do it one track at a time: read a track, write that track, then step forward one track, the total number of steps to copy n tracks is n-1 steps. And still only n-1 if you verify each track as you go. -- Pete Peter Turnbull Network Manager University of York

24 years, 10 months

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SemiOT: Mourning for Classic Computing

by dhquebbeman＠theestopinalgroup.com

> Douglas Quebbeman skrev: > > >> You still don't get it. Demos have no marketing relevance whatsoever. They're > >> done just for the fun of it, and the prestige. They don't fulfill any needs > >> and don't claim to do it. I don't even see why I'm trying to explain to > >> you, you don't even seem to read what I write. > > >No, I trying very hard to grok this. Is this in the United States? > > I don't know, but I haven't seen any USA demos. You'll have to ask someone > from the NTSC world. > > >What part of the country? It doesn't happen around here (Louisville, > >KY metro area), I'd have heard of it. Given the Internet, I suppose > >my world shouldn't be limited to a 150-mile radius, but in a way, it > >is. > > There are parties in all of Scandinavia each year, as well as Poland and > France. Don't know about the scene beyond there. Ok... what was throwing me for a loop here, was that you seemed surprised that I was unaware of them, but they turn out to be something we don't have around here, so my absence of familiarity shouldn't be such a surprise... Regards, -dq

24 years, 10 months

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CBM 8032 SK (& electronics)

by pete＠dunnington.u-net.com

On Aug 23, 10:29, Adrian Vickers wrote: > >> >> I'd have to buy a 'scope, and they're not cheap... > >> > > >> >You can get _good_ second-hand 'scopes for less than a poor quality new=20 > >> >one. Stewarts of Reading often have Tektronix 'scopes for a few hundred=20 > >> >pounds (something like a 465 or a low-end 7000). > >> > >> Which would you recommend? I'd pay =A3200-=A3300 for something that's goi= > > > >Don't buy a new low-end 'scope (certainly not one of the Lucky Goldstar > >or whatever that Maplin sells (I think the 'Lucky' part of that brand > >name describes what you are if it works properly :-))). The Tekky 465 is > >a small-ish portable instrument. The 7000 is larger, but it takes plug-in > >modules, which means you can get (or could get) various special-purpose > >plug-ins. That's not too useful unless you have some special applications > >and _can get the right module_. > > I think simple, but reasonably useful for now at least; I may need fancy > stuff in the future, but I'd prefer a "beginners" instrument for now. I'll > go with the Tex 465 then, if I can get one, or I'll ask them which they > recommend on a similar level. Adrian, I have a Telequipment D54 scope (dual-beam, 20MHz) surplus to requirement at the moment. It's in good condition, and it's probably rather better than most modern low-end "20MHz" scopes (which tend not to have very good rise times at the top end of their supposed bandwidth). Was it you who mentioned something about difficulty tinning a soldering iron? I wondered if the bit was iron-plated -- they can be a pain to re-tin if they get corroded. I found the best thing for that is a small tin of tip cleaner/tinner; you can get it from RS (cat no 561-533, about ?4) or CPC (cat no SAM-19, ?3.05). -- Pete Peter Turnbull Network Manager University of York

24 years, 10 months

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TRS80 help needed

by pete＠dunnington.u-net.com

On Aug 23, 7:23, Pete Turnbull wrote: > On Aug 22, 17:24, Don Maslin wrote: > > Pete, were those the ones that also had a `touch latch' door on them? > > Some of the Otrona Attache's used such drives, but I had no idea that > > they were 40/80 switchable! Do you have any jumper information for > > them? > > They actually made two or three models, so yours may not be switchable. I > do have the jumper information somewhere, and I'll look for it this > evening. Mine is a Canon MDD220. Yes, it's a "touch-latch" door. It has three DIL switch packs: SW1, 4-way, beside the 34-way connector: SW1-1 on for DS1 SW1-2 on for DS2 SW1-3 on for DS3 SW1-4 on for DS4 (40/80-track switching) SW2, 7-way, near the front of the drive: SW2-1 InUse LED with Head Load SW2-2 InUse LED with Door Lock SW2-3 Door Lock with Drive Select SW2-4 Door Lock with InUse SW2-5 Door Lock with Head Load SW2-6 unused SW2-7 Head Load with DrvSel/DoorClosed SW3, 6-way, beside the 34-way connector: SW3-1 Independant Head Load SW3-2 Head Load with Drive Select SW3-3 Motor On with Drive Select SW3-4 Independant Motor On SW3-5 80/40-track (Drive Select 4) SW3-6 80/40-track switching via Drive Select SW3-5 = ON means that 40/80 mode is determined by the position of SW1-4, not by the select signal received from the host: SW3-5 ON, SW3-6 ON, SW1-4 OFF => 40=track mode, LED will be GREEN SW3-5 ON, SW3-6 ON, SW1-4 ON => 80=track mode, LED will be RED There are also 7 pads near the power connector, laid out like this: ___ | \ 7 1 | } 6 2 | } 5 3 | } 4 | } |___/ Normally, these are made 1-6, 2-5, 3-4. To use the 80/40-track switching, cut link 1-6. The MDD210 drive is similar but without switching (80-track only). The MDD6106 is also similar but without switching (I think 40-track only). -- Pete Peter Turnbull Network Manager University of York

24 years, 10 months

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humorous descriptions of ebay item

by healyzh＠aracnet.com

> When you click on a picture, it makes the big picture below it be the > one you clicked on. The big picture has a label. Alternatively, if you > sit on one picture with your pointer for a bit, it will show you the > title (at least it does with IE). With Netscape you click on the thumbnail and get the big pic, but no label. Zane

24 years, 10 months

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Apple II software, system discs, blank disks? Help!!

by pete＠dunnington.u-net.com

On Aug 23, 9:47, Shaun Stephenson wrote: > I just aquired an Apple II but havent got any software. Does anyone have > any discs they could lend/copy for me (just thinking of old games, PD > stuff, whatever), or know of a good source? Also I need some system > discs desperately... again can anyone help me out on this? It depends on what model you have. I assume (from your email address) you're in the UK? If so, I'd guess you have either an Apple ][ Europlus, or perhaps an Apple //e. I can copy you a DOS 3.3 system master (if you have a Europlus, you'd need to have P5A and P6A PROMs in your Disk ][ card, for 16-sector disks). I might have a DOS 3.2 system master (13 sector) if you only have P5/P6 PROMs, but the A versions are more common. I also have quite a lot of games, a few utilities like Kermit, miniassembler, etc, and some digitised pictures. However, some of the games need Integer BASIC, so you'd need a language card to run those ones. I also have a few ProDOS 1.1.1 disks, but they only work on a //e. > Finally, does > anyone know a good source of 5 1/4" blank discs? Old driver disks for PCs, old magazine disks, etc. But make sure they're single or double density (48 tpi or 96tpi), NOT HD (High Density) disks. Either single or double sided is fine for an Apple ][. -- Pete Peter Turnbull Network Manager University of York

24 years, 10 months

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humorous descriptions of ebay item

by healyzh＠aracnet.com

> Yes, there are a number errors in the picture labels. Why are you > seeing a different page? Aren't we both looking at this one? > > http://www.fibraplex.com/PDP8/ultimate_pdp.htm That's the page I'm looking at. > Or is your browser lacking in capability? In Netscape/Mac PPC 4.78 all the thumbnails are in one long row, no picture labels In Netscape/Linux x86 4.76 the thumbnails are in multiple rows so I don't have to scroll right to see them all, however, there are again not picture labels. I'm assuming you're using Internet Explorer, and that this is some incompatibility between the two browsers. Zane

24 years, 10 months

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How do you take apart a Z-19 case?

by r_beaudry＠hotmail.com

Hello all, I recently saved a Zenith Z-19 terminal from the ravages of my local "recycling center" (i.e., dump). However, the power cord was cut off just after it exits from the back of the terminal (as if I do not already have enough to fix). It looks like there is a small panel that can be removed >from the bottom, giving me access to the power supply. I could probably replace the cord from there, but before I do, I want to take the case off to make sure there is no major damage inside. I removed the panel along the back that has the RS-232 connection and brightness knob on it. This seemed to free up the back of the top part of the case. It is getting hung up about halfway down each side. There appears to be a bracket attached to the bottom half of the case, and a pin that goes through the bracket from the top half of the case is hung up (are you confused yet?). Anyway, if anyone has done this before, please enlighten me as to taking this thing apart. Other than the power cord, and a little dirt and grime, the unit is in good shape. The CRT (what is visible from the outside) looks good, and the keyboard appears to work (no stuck keys or grinding noises when pressed, etc.). It has a cool circular metal "property of Raytheon" tag on it, and I'd like to get it running if possible. It would make a good terminal for some of my rack-mounted Multibus stuff... Thanks! Rich B.

24 years, 10 months

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classiccmp Jobs?

by jss＠subatomix.com

It's time for me to look for a job. I've been unemployed (voluntarily, happily so) for a month, and re-establishment of a dependable cash flow is becoming a top priority. Since I'll be finishing college next May, it's also time to begin looking for my first post-college position. Can a programmer make a career out of classic computing? I'm not thinking of titles like eBay seller, parts reseller, museum lackey, or midnight-shift tape mounter either; I mean an honest programming job, having some non-drudgery thing to do with classic computing. I'm guessing the answer is "no", but I would still like to see it discussed. It is also on-topic! :-) Ample application of imagination is all right. I'm also highly interested in embedded programming. I had a taste of it at my previous job, and it was extremely enjoyable. O respected, veteran sages, how does one in my situation create a career in embedded programming? Please reply to this paragraph off-list. -- Jeffrey S. Sharp jss(a)subatomix.com

24 years, 10 months

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