test-drb

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101090 discussions

GPIB in chemical labs (adding to Re: HP 9836, HP 86)

by chemif＠mbox.queen.it

At 23:45 13/07/97 GMT, you wrote: >>GPIB = General-Purpose Interface Bus. Aka IEEE-488, and very similar to >HPIB (= Hewlett-Packard Interface bus). HP were the company who designed it, >but it turns up on all sorts of machines. > >It's an 8-bit parallel interface using a 24 pin connector. 8 pins are ground, >8 are data, 3 are handshake, and 5 are bus control/management. It was >originally designed to link up lab equipment (DVMs, counters, digital 'scopes, But also for interfacing Analytical Instruments (Spectrophotometers, Gas Chromatography etc.) for chemical laboratory, where HP is still one of the most important developing company, and where GPIB is still used. ???????????????????????????????????????????????????????????????????????????? ? Riccardo Romagnoli,collector of:CLASSIC COMPUTERS,TELETYPE UNITS,PHONE ? ? AND PHONECARDS I-47100 Forli'/Emilia-Romagna/Food Valley/ITALY ? ? Pager:DTMF PHONES=+39/16888(hear msg.and BEEP then 5130274*YOUR TEL.No.* ? ? where*=asterisk key | help visit http://www.tim.it/tldrin_eg/tlde03.html ? ? e-mail=chemif(a)mbox.queen.it ? ????????????????????????????????????????????????????????????????????????????

28 years, 8 months

IBM 5161??

by dastar＠crl.com

I saw an interesting relic in the thrift store the other day...and IBM PC "Expansion Chassis" (I believe that's what it was called). It was basically an IBM PC case with two full height hard drives instead of floppy drives. It's model number was 5161 (if I recall correctly). Didn't bother with it, even though it is kinda unique. Sam ------------------------------------------------------------------------------- Computer Historian, Programmer, Musician, Philosopher, Athlete, Writer, Jackass

28 years, 8 months

PAM computer, Convergent?

by dastar＠crl.com

Ok, saw three things of interest today. First, I saw a set of boxes from some Scottish company. One was called the PAM computer and simply had some red LED displays on the front to display numbers. Another was FINANCIAL ANALYSER and another still was, oh, forgot. Weird. Anyone ever heard about these? They seemed to be boxes for doing calculations, or displaying results of formulas? Also saw and picked up this Convergent computer thingy. Pretty cool. It has modules that plug together. One is the PROCESSOR module, then there's the EXPANSION DISK module. The boxes which make up this "computer" fit together via this bus and then there's this lever you use to lock the boxes together. Seems I forgot to pickup the Processor module (paid for it but forgot to get it). I also saw some dumb terminals for this system at a thrift shop (they are gone now). Anyone have any info on this? Lastly, I saw this pretty awesome looking Morrow computer which seemed to be of a portable ilk. At first when I saw it from afar it looked like one of those phony props you see in furniture stores. When I got up close I realized it was an actual computer with this funky wide screen built in (it was about 4" high by 8" wide) and two floppy disks. The proprietor of the place I was at made me put it back because apparently it has all the store's financial records back a few years. I offered to copy all the data off for him and pay him good for it but he flat-out refused. Very frustrating. I plan on bugging him about it everytime I go back. Sam ------------------------------------------------------------------------------- Computer Historian, Programmer, Musician, Philosopher, Athlete, Writer, Jackass

28 years, 8 months

F8 chip was Video Brain

by allisonp＠world.std.com

:> Technology PMOS NMOS This is wrong. both are N-channel silicone gate NMOS. :> # of Instructions 69 70 What this doesn't tell is that the F8 had a very weak instruction set. doing something like xoring a byte was tedious to say the least. The 8080 instruction set was far more general. The F8 was aimed at the market that the 8048 and 8051 would later dominate, IE: single chip MPUs of general application. Also april '78 KILOBAUD had an article speculating on how to use a VB system as a cheap graphic peripheral. Allison

28 years, 8 months

help with NCR 1203-6000?

by rws＠ais.net

I may have a chance to get a NCR Model 1203-6000 (it's about one step >from abandonment). It appears to work and run both CP/M-80 and MS-DOS. On the serial number sticker it lists its manufacturer as NCR GmbH- am I to assume this may mean it is of German origin? My questions are, has anybody heard of this machine? Does anyone have any info on it? Is it even a classic? Thanks, Richard Schauer rws(a)ais.net

28 years, 8 months

PAM computer, Convergent?

by fmc＠reanimators.org

Sam Ismail <dastar(a)crl.com> writes: > Lastly, I saw this pretty awesome looking Morrow computer which seemed to > be of a portable ilk. At first when I saw it from afar it looked like > one of those phony props you see in furniture stores. When I got up > close I realized it was an actual computer with this funky wide screen > built in (it was about 4" high by 8" wide) and two floppy disks. A Morrow Pivot. Portable, battery-operated MS-DOS machine; I'm not sure how IBM-compatible it is. Made by Vadem in Milpitas, OEMd by Morrow as the Pivot, Zenith as something (think they sold a bunch to the IRS), Osborne as the Osborne 3. Keep your eyes open, there are others out there. I've seen one at Halted in Santa Clara but as usual for Halted they were asking a bogus price for it, something like $100. -Frank McConnell

28 years, 8 months

Datamaster troubles

by Philip.Belben＠powertech.co.uk

Rich Cini wrote: > My Datamaster Troubles... > Well, I'm reviving my Datamaster. Last year, it worked fine (I at least > could get into Basic). This year, I can't even get it to boot. I have no > manuals for the darned thing, so I have no idea what the numbers on the screen > during the POST mean. I have one reverse-highlighted number: "09" and I'm > assuming that this is a hardware failure code. > I have the "Diagnostic" diskette, but since I think that the floppies are > not working (or the diskette is now bad), it's useless. I must admit, I haven't booted mine recently. It is just about visible under the pile of junk in that part of my computer room... I can, however, easily get at the manuals. The service manual is not much use, I'm afraid, but I can look up the diagnostic codes for you. I shall try and do this this evening, and post it tomorrow, but I can't promise anything. Philip.

28 years, 8 months

He shoots! He Boots! Heath Lives!

by zmerch＠northernway.net

Whilst in a self-induced trance, Stacy C. Morang happened to blather: >On Tue, 24 Jun 1997, Roger Merchberger wrote: >> H-120-1. I'm assuming this is the model number. >It is. Uh... Update, folks! (and I gotta name this thing now... how about "Heather"... 8-) Get it?!? It boots! Did I mention that it came with one floppy disk stuck in the bottom drive? This floppy was a boot floppy! And it still works! Joy! ;-) >> Something tickled in my brain about those floppies, so as I lumbered around >> in the dark in my newly-begun clean-ish basement (Eeeeek!) I found my old >> non-working Atari 810 disk drive... and the mechs looked almost exact! >> Would these happen to be the same mechanically, would anyone know? > >Probably not, the Z (or H) used standard SA-455? 360K ibm pc style drives You're right, but they seem to format to only 320K (8 sectors/track, not 9) with the DOS I do have, which is listed in the stats of the machine I listed below... The broken drive *does* work! It's only the door that's broken, so I sacrificed my Atari 810 (which was dead anyway) and the garage door from it is exact! Yiippee! >Top, I think. (I have one, but I only got it for the Winchester drive >card). Whaddya did with the rest? A few spare parts might be nice (or a color tube, if yours had it... ;-) >That is the monitor rom, and certain keys should do something more >interesting, like > >C - color bars (if you have color video, otherwise b&w bars) >B - boot prompt, pressing the right combo of numbers and fkeys selects >the boot drive. > >D - dump memory I don't doubt your memory, but I think this is a (prolly earlier) version of the monitor rom... specs to follow. I fat-fingered *all* the keys on it, and here's what works: B -- boots. Accepts parameters of: 0, 1, 2, 3, and that tells it what floppy to boot from. Plain B assumes floppy 0, which is top. Thanks! All else beeps with invalid parameter, except "S", which appears to do nothing. Would this be boot from the serial port, perchance? V -- Version of the monitor rom, which is Version 1.02. Nothing else worked... >It will boot off of CP/M, MP/M, UCSD P-System, Concurrent CP/M, MS-DOS >and others. If you find a generic version 1 or maybe 2 ms-dos it might >boot, pc specific PC dos won't. This thing came with a Version 1 Dos... here's the specs of the boot: Z-DOS / MS-DOS BIOS Release 1.00 Version 1.02 Z-DOS / MS-DOS Release 1.00 Version 1.25 (C)Copyright 1982, Zenith Data Systems Z-DOS / MS-DOS Command Release 1.00 Version 1.19 >The machine has an 8088 and an 8085 processor, and uses the appropriate >one for the os in question. I've pulled 'er apart to fix the floppy, and to clean the keyboard & all. Sure enough, it has a NEC 8085A plastic, and an Intel 8088 like-eprom-whatever-you-call-it case. It presently has 128K RAM in it! Questions: 1. Whilst it's all apart, does anyone want me to snap pictures? I can... 2. How high can this rascal go in memory? I located 3 banks (9 each -- parity) of 64kx1 300ns DRAM, two of which are populated. Mathmatically, that works to: 128K RAM. The third bank is empty. Can I pop in 9 more chips without setting any jumpers/dipswitches? How about bigger DRAMS? (prolly not... but it's worth an ask!) Still, 192K is still pretty good for a machine from '82! (also, on the question of jumpers... anyone have a tech-like manual for this thing I could get a copy of... or at least a copy of the important pages?) 3. The video board which is based on the Motorola 68A45P video chip, presently has 64K onboard for *just* the green section of the board. This rascal can handle 192K Video Memory!!! Funky! ;^> (that is, if I'm reading the boards right.... but CHKDSK doesn't return the added video memory, so that'd seem correct.) Does the board support any form of graphics? I tried the standard basic commands (ZBasic was on the floppy) but it seemed only to work in text. For this thing having 2 Intel-based processors, I'm surprised with the amount of Motorola logic in this rascal! Prolly a 3rd of it is Moto, including the 74 series chips! All of the important support chips, like the video processor, the PIA's & UARTS, and all that jazz seem to be Moto. Well folks, I havta say: This is one *sweet* machine! :-) >I'm not sure what the licensing requirements are, however, I do have >several OS's for the machine - I'm sure something can be worked out. Did Heath/Zenith bundle an OS with the disk systems? If so, wouldn't I own a license to own a copy of the included OS, as I own the machine? I'm not sure how stuff like that works, especially on the old stuff. >You're welcome, pity I'm so far behind in the mail... >-stacy No prob... I'm behind as well, as you can plainly see! >So long, and keep your stick on the ice. Ohhh, brrrr! I hope yer' talkin' Hockey!!! ;^> Thanks again, and have a good weekend! Roger "Merch" Merchberger -- Roger Merchberger | If at first you don't succeed, Programmer, NorthernWay | nuclear warhead disarmament should *not* zmerch(a)northernway.net | be your first career choice.

28 years, 8 months

Western Digital Host Adaptors

by IVIE＠cc.usu.edu

>> I have a few WD-1000 host adaptors, and I need to get some >> information about them. Western Dig. is of not much help-- their web >> site dosen't carry docs from that far back. >> >> I used to have a chart delineating what controller card was what, but >> I've since lost it. There aren't PeeCee host adaptors; rather they >> are the same footprint as a 5.25' floppy drive (actually, one is >> bigger). > >I'm pretty sure that these aren't host adapters; I think they're >controllers in the traditional SCSI sense. (i.e. you sandwich >them between the SCSI bus and a MFM or ESDI drive.) Somewhere I have docs on the WD1002-05 which, IIRC, has a WD1000-compatible hardware interface. The exception is that the WD1000 supplies a WAIT signal and the WD1002 doesn't. "The WD1002-05 has been designed to interface to a Host processor via a parallel port or CPU bus configurations. The specific signals are compatible with the WD1000/WD1001 series of Winchester-only controller boards. With the inclusion of the WD1015, the previous WAIT signal is no longer necessary, but has been provided for compatability; status information is always available to the Host for monitoring command progress. When the Busy bit is set, no other status bits are valid." The host connector is a 40 pin connector. Of this, all even pins are grounds. The other pins are: 1 -15 : DAL0 through DAL7 respectively 17-21 : A0 through A2, respectively 23 : CS 25 : WE 27 : RE 29 : Pulled up on the WD1002; this is probably WAIT on the 1000. 31, 33: Not connected 35 : Interrupt request 37 : DMA request 39 : Reset I suspect the interrupt request, DMA request, and Reset ar all asserted high; the photocopied manual section I have doesn't make this clear. The WD1002 is programmed like an IDE controller with an 8-bit data register. I suspect the WD1000 is as well. Roger Ivie ivie(a)cc.usu.edu

28 years, 8 months

Bigger problem with VMS

by IVIE＠cc.usu.edu

> As I have no username/password, I can't shut it down right! > How do I shut down VMS without losing the harddisk? > Can I just power it off? OK, a few things about VMS. To break into VMS, boot it /1 like this: >>> b/1 It will give you a SYSBOOT> prompt, at which time you tell it to use the console for the startup command file: SYSBOOT> set/start=opa0: SYSBOOT> continue Then it'll boot farther and give you a $ prompt. What I usually do here is this: $ spawn <<< spawning SYSTEM_1 message >> $ @sys$system:startup This executes the startup file. When the startup file exits, you get the $ prompt back. At that point, you can: $ spawn $ set def sys$system: $ mc authorize UAF> set system/password=whatever UAF> ^Z $ At this point, you can either shut the system down: $ @sys$system:shutdown [[[ you can punch return to all the questions ]]] and power cycle the system or just hit the power switch. Unlike Unix, VMS doesn't eat the disk if the power goes out unexpectedly; normally, you'll want to shut it down with the shutdown command, though (what happens if any files are open is that blocks allocated to those files are marked as allocated in the bitmap but not recorded as belonging to those files in the directory; if you just turn the power off, you'll essentially lose space on the mounted disks that have open files). The next time you boot, the system will remember that it wants to use the console as the startup command file, so you'll have to do the "conversational boot" again and set it back: >>> b/1 SYSBOOT> set/start=sys$system:startup.com SYSBOOT> continue Roger Ivie ivie(a)cc.usu.edu

28 years, 8 months

HHC UPDATE

by josh＠netins.net

>dastar(a)crl.com could you bump my order down to two? Thanks! Josh M. Nutzman +----------------------------------------------+ |"Life is like a river, you go with the flow...| | but in the end you usually end up dammed." | | -The Red Green Show | +----------------------------------------------+

28 years, 8 months

Modem Collection

by IVIE＠cc.usu.edu

>On Fri, 11 Jul 1997, Roger Ivie wrote: > >> I'm not doing it on purpose, but I find myself unable to let go of this >> Novation CAT modem that I dredged up a few years ago... > >Hmm; I just picked one of these up with an incomplete Apple ][plus system >that I haven't yet had time to muck with, short of cleaning it up a bit. >What's special about it? Absolutely nothing. It's a standard 300 baud modem. Roger Ivie ivie(a)cc.usu.edu

28 years, 8 months

Modem Collection

by IVIE＠cc.usu.edu

> > > Just curious (again!) if anyone is collecting the early modems used on > > > computers and what might have been the earliest commercial phone modem. > > > > I'm not doing it on purpose, but I find myself unable to let go of this > > Novation CAT modem that I dredged up a few years ago... > > Are you referring to the AppleCat? Nope, I'm referring to a plain old Novation CAT 300 baud acoustic coupled modem. I saved it from the trash heap a few years ago because I was going on travel somewhere that I knew A) I would have to do some remote access >from my hotel room and 2) the hotel room didn't have modular jacks. It was the only acoustic coupler I could find and worked great. I haven't had the heart to toss it out since. BTW, this would have been about '92 that I was using 300 baud modems from hotel rooms... Roger Ivie ivie(a)cc.usu.edu

28 years, 8 months

(Fwd)

by jeff.kaneko＠ifrsys.com

Here's a real classic for ya. I'd have killed for a system like this one, but married life, no room, no time, blah blah blah . . . Maybe someone out there wants this. Jeff ------- Forwarded Message Follows ------- Path: Supernews70!supernews.com!news.he.net!news-spur1.maxwell.syr.edu!news.maxwel l.syr.edu!chippy.visi.com!news-out.visi.com!hookup!winternet.com!not-for-mail From: Jim Tousignant <jtous(a)pcpros.net> Newsgroups: comp.sys.m6809 Subject: 6800 Exorciser System Date: Thu, 10 Jul 1997 11:39:30 -0500 Organization: Acme Lines: 7 Message-ID: <33C51042.42DB9891(a)pcpros.net> NNTP-Posting-Host: dialin45.pcpros.net Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Mailer: Mozilla 3.0 (X11; I; Linux 2.0.0 i586) Xref: Supernews70 comp.sys.m6809:186 Anyone have a use for a Motorola 6800 Exorcisor System? This is a real antique - we're talkin dual 8" drives here, 6809 assembler, all kinds of add on cards.

28 years, 8 months

IBM 5110

by HamiJohn＠aol.com

Hi, Had one at work in the late 70's/early 80's. What specifically would you like to know? John Hamilton hamijohn(a)aol.com

28 years, 8 months

What exactly, is an IBM System 36?

by Philip.Belben＠powertech.co.uk

> I have the oportunity to aquire an IBM System 36 model 5364 with manuals > and operating disks, all in working condition. My question is, I have never > heard of this system (the 360/370, yes). What can I expect? The S/36 is a minicomputer from the early 1980s (?). It replaced the system/34, although I still had to work on one of the latter as a student in 1985-6. I don't think I have much documentation on the S/36, but I have some on the S/34, including an OCL (operation control language - rather like JCL) reference which might help you. The 5364 was a late S/36, the Desktop model. It comes in a box that looks remarkably like a PC/AT (the only external difference being the disk drive bays I think). Unfortunately its floppy drive is 5 1/4 inch, where all other S/36s at that date had 8 inch. Trivia information: The largest S/36, together with the S/34 and a word processing system of which I can no longer remember the number, all had the nicest floppy drive I have ever seen. It took twenty-three disks - three singly and two cassettes of ten each - on a moving carriage (tautology??). It moved the carriage until the appropriate disk was opposite the hole, then sucked it in and read/wrote it. Fast. :-) Philip.

28 years, 8 months

History of Video Games (RE: "Bally Astrocade")

by Philip.Belben＠powertech.co.uk

Uncle Roger wrote: > (But I always was, and always will be, a Robotron man...) What!?!?! Do you mean the East German Robotron Elektronik, or is this another company with the same name? If the former, do you know what the Robotron 7022 is/was? I think it is a micro of early '80s vintage. I have a Robotron 7622 - a large (5U rack mount) box that appears to be the console for it (lamps and switches and four 7-segment hex digits). I am trying to reverse engineer but am having problems with Russian chip numbers. Sometime soon I shall make a longer posting on this subject... Philip.

28 years, 8 months

Video Brain

by ccm＠sentex.net

>Sam Ismail wrote: > One of the >> systems he mentioned he had was a Video Brain. Apparently this is a >> video game system. I *think* I vaguely remember hearing about this >> system. At any rate I'm curious about it and was wondering if anybody >> knew what it was as we both had too much tequila for him to describe and >> for me to comprehend it. >Video brain was made by a firm called UMTECH, used a microprocessor >called F8 and had 1 to 4K of RAM memory. It was possible to store the >data on cassette and, you are right there, it had many plug-in >cartridges with games on them. It was sold mainly through departments >stores and specialty electronic stores (at least that is what "A >Collector's guide to personal computers" book has to say about it) > >enrico > >================================================================ >Enrico Tedeschi, 54, Easthill Drive, BRIGHTON BN41 2FD, U.K. >tel/fax +(0)1273 701650 (24 hours) or 0850 104725 mobile >website <http://www.ndirect.co.uk/~e.tedeschi> >================================================================ >visit Brighton: <http://www.brighton.co.uk/tourist/welcome.htm> > > > This is a case of two computers and one name. The Video Brain is also a desktop, CP/M microcomputer built in the early 1980's. It physically resembles an Applied Digital Data Systems ADDS 70 intelligent terminal with dual 5 1/4" floppies mounted beside the monitor. Now you must investigate further and tell us which one it is. Yours in good faith.

28 years, 8 months

Classic Video Games

by sinasohn＠crl.com

At 07:48 PM 7/11/97 -0600, you wrote: >I think that was RS. I had one of those too. Got pretty boring pretty >quick, cause you could fake down, go up three times and spaz on the >forward button for a guaranteed first down every time. (or was it a >guaranteed TD? I can't remember.) guaranteed TD. Yep, that's it. 8^) It may have been boring, but it was better than studying! --------------------------------------------------------------------- O- Uncle Roger "There is pleasure pure in being mad sinasohn(a)crl.com that none but madmen know." Roger Louis Sinasohn & Associates San Francisco, California http://www.crl.com/~sinasohn/

28 years, 8 months

Some Commie questions

by george.lin＠documentum.com

Zane, Are you trying to connect the 1702 monitor to the C128 RF port? It won't work. The 1702 monitor should be connected to the C128 VIDEO port via a special cable. The VIDEO port outputs composite video signal. The RF port outputs VHS Channel 3 or 4 and is used for TV connection. George -- George Lin Documentum, Inc. (Nasdaq: DCTM) Manager, Data/Voice Communi- Phone/Fax: 510-463-6800/6850 cation & End-User Computing http://www.documentum.com Email Fax mailto:remote-printer.George_Lin@4.3.8.6.3.6.4.0.1.5.1.tpc.int My PGP Public Key for encryption is at http://george.home.ml.org/pgp.htm -----Original Message----- From: Zane H. Healy [SMTP:healyzh@ix.netcom.com] Sent: Sunday, July 13, 1997 3:11 PM To: Discussion re-collecting of classic computers Subject: Some Commie questions Hi, I gather this rates as a classic at least :^) Been working on my Weekend haul, and having only ever had a Vic 20 (which sadly I gave away years ago), I'm somewhat out of my depth. My main question is on the C= 128, along with all the other stuff I picked up, I got a Commodore 1702 monitor, and a couple 1541 drives. I've got the drive attached, and the monitor hooked up via a RF cable (I guess that's what it's called) through the front connection (This works for the Amiga 500 I also got yesterday). Anyway, I power the thing on, it "buzzes" the drive like it's expecting to find something, and I don't get anything on the display. I remember that the C64's like the VIC-20 would drop you at the prompt even if you had nothing attached, and didn't need any kind of boot floppies. Do I need some kind of boot disk for this beast? I gather a CGA monitor will work, so I guess I should dig out one of the old Mono-CGA monitors I've got in storage. The next question would be, is it worth trying to repair a C64's power supply? I got two of them yesterday, both powersupplies are dead. It looks like the 5V line is shorted to ground. I did get a copy of the Old & New style users manuals, and a copy of "Troubleshooting and Repairing your Commodore 64" yesterday (I love Powells Technical Books!) so I've got some documentation. It's been too many years since I worked as an Electrician, so my skill level is pretty low (wasn't very high to begin with, which is why I switched to computers). Then there is the Amiga 500. About a month ago, I'd picked up a copy of "Bards Tale" for the Amiga, so I know it works. Problem is I don't have a copy of the two floppies that came with the computer originally (also got the manual for this at Powells). I think I've got the Kickstart 1.2 ROMs (it has a 1.2 on the screen when asking for the Workbench disk). Where can I get the disks? I don't suppose it's like the Apple IIgs software that you can now download. The second Amiga question would be, is it possible to hook up Apple IIgs, or Macintosh 3 1/2" external floppy drive with a Amiga? I somehow doubt it, but... Thanks, Zane | Zane H. Healy | UNIX Systems Adminstrator | | healyzh(a)ix.netcom.com (primary) | Linux Enthusiast | | healyzh(a)holonet.net (alternate) | Mac Programmer | +----------------------------------+---------------------------+ | For Empire of the Petal Throne, and Traveller Role Playing | | see http://www.dragonfire.net/~healyzh/ |

28 years, 8 months

Video game machine/Computer With 6800 Processor

by MPritchard＠ensemble.net

> Does anyone remember this machine : > > it's a video game console (like the atari VCS) but which could sit on > a box which then converts it to a home computer. > > The machine ran on a 6800 and had built-in basic. > > It came out approx at the same time as the Atari 400/800 series > (78-79?) > > I remember seeing an ad on it and the heading of the ad was > "imagination machine". > > > Ben > > Ahh, the "APF Imagination Machine" I believe. Somewhere I have a > single cartridge for it. > > -Mp

28 years, 8 months

Updates

by bill＠booster.bothell.washington.edu

Hi all. A lot of things have been significantly updated over the last few weeks. You may want to take a look. The web site (http://weber.u.washington.edu/~bcw/ccl.html) has been reworked somewhat. Brett's Classic Computer Encyclopedia (http://www.xnet.com/~danjo/classic/index.html) has grown quite a bit but could use some images (hint, hint, guys) Isaac's Classic Computer Rescue site (http://www.comland.com/~idavis/classic/classic.html) is looking good. The Links Section of the web site has nearly doubled (although I know you guys have more that you could cough up ;) Same with the FAQs section (once again - send me more) and the ClassicCmp FAQ has been HTMLized for your ease of reading. The document archive is online (although most listings are still being held under review). The Big List of Classic Computers now contains sections for Prototype and Limited-Run computers and for computers which more info is needed on. The FTP site has been indexed and divided up into sections for various computers - not a whole lot is there, a few faqs, articles, and pictures. Feel free to send more ;) (ftp://140.142.225.27/pub/classiccmp) Bill ---------------------------------------------------- Bill Whitson - Classic Computers ListOp bill(a)booster.u.washinton.edu or bcw(a)u.washington.edu http://weber.u.washington.edu/~bcw

28 years, 8 months

HP 9836, HP 86 ??

by ard＠p850ug1.demon.co.uk

> > The HP86 is basically an HP85 without the built-in monitor,tape drive, > > or printer, but with GPIB as standard. The 9121 is a single-sided version of > > the 9122 if that's any help. > > Ok, you've lost me on that one. What is the GPIB? GPIB = General-Purpose Interface Bus. Aka IEEE-488, and very similar to HPIB (= Hewlett-Packard Interface bus). HP were the company who designed it, but it turns up on all sorts of machines. It's an 8-bit parallel interface using a 24 pin connector. 8 pins are ground, 8 are data, 3 are handshake, and 5 are bus control/management. It was originally designed to link up lab equipment (DVMs, counters, digital 'scopes, etc), but HP use it as a general peripheral bus (disk drives, plotters, printers, etc) on some of their micros. Commodore used it for much the same purpose (although with looser timing requirements) on the PETs > David Williams - Computer Packrat -tony

28 years, 8 months

HP 9836, HP 86 ??

by ard＠p850ug1.demon.co.uk

> There are two flavors of HP 86, the 86A and the 86B. Thanks for the info - I've only used 86B's. > Re: the 9121: yep, single-sided Sony stiffy drives that hold about > 300KB I think. It's been too long and I have forgotten just about > everything except that the single-sided ones never seemed to hold > quite enough (this on HP 150s). Probalby 320 or 360K bytes (at least on the 150 - is the 9121 supported on the 150 - my manuals are silent on the subject...). It's 80 track single-sided, and thus the same size as a double-sided 40 track disk. > You know how 3.5" drives open the metal slider so they can get at the > medium? The very earliest drives didn't, and the stiffies didn't > spring-load the slider -- it was up to the user to slide the slider > before insertion into and after removal from the drive. I've also seen disks that open automatically, but stay open when ejected. You 'pinch' them to close them. They did not close automatically on ejection from any drive. > -Frank McConnell -tony

28 years, 8 months

PDP performance question.

by ard＠p850ug1.demon.co.uk

> what is a PDP? choices 1,4,5,6,7,8,9,10,11,11/780,11/750,11/730? Got something against the PDP12 and PDP15, then ? :-) [Sorry, couldn't resist it!] > Allison -tony

28 years, 8 months

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test-drb