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

by healyzh＠aracnet.com

OK, this is a little wierd. Let me start by saying I have no clue as to who the person is selling the system, I just think the pictures are the best I've seen. Beware, they're big, and there is three of them. http://cgi.ebay.com/aw-cgi/eBayISAPI.dll?ViewItem&item=291428599 I thought the first two were especially nice. Really make my -8/m shots look horrible. Zane | Zane H. Healy | UNIX Systems Adminstrator | | healyzh(a)aracnet.com (primary) | Linux Enthusiast | | healyzh(a)holonet.net (alternate) | Classic Computer Collector | +----------------------------------+----------------------------+ | Empire of the Petal Throne and Traveller Role Playing, | | and Zane's Computer Museum. | | http://www.aracnet.com/~healyzh/ |

26 years, 3 months

1
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PDP-11/23 deskside machine -DAMN

by mbg＠world.std.com

>After putting the skins back on the machine it is giving me a ERROR 13 - >DU0 not ready error. If you have a BA23, make sure that the pushbuttons on the front panel are set correctly (one is for drive enable, one is for drive write protect). >I knew it wouldn't be that easy. I have a couple of spare ST506-type >drives to hang off it but don't know how picky the controller is or where >to find install media for an operating system. The drive sounds fine >(spins up and purges but no boot anymore) DAMN. Depending on which RQDX interface you have, you may or may not be able to put any ST506 disk on it that you want... early controllers were pre-programmed with the characteristics of the disks they would work with... anything else couldn't be used. I don't know if the RQDX3 allows more lattitude, but using RD52, RD53 or RD54 is the way to go, if you can find them... >What free operating systems are out there for this machine. I suppose I >will get another drive up and running and then get the data off of this >one if it is possible. DAMN. Precious little... If you want to run Unix, you could try to get Ultrix-11, but that was retired by DEC long before it was acquired by Compaq. All the pdp-11 operating systems from DEC are licensed. You could run *real* BSD Unix, but for an 11/23[+], you'll need 2.9BSD. A license will cost $100 (check with the PUPS web page). >To be honest I think I didn't park the drive before powering off the last >time and suspect a head crash wiped the boot sector or something like >that. Now when I try to boot I hear the drive track but get this error. >DAMN. Ouch... there was a problem with earlier controller boards when powering off the system box before the disk... the write signals would go active and the disk would have garbage randomly written on it... >How can I get boots to restore a system? Again... the DEC PDP-11 operating systems are licensed software, they can't simply be handed out... Yes, I suspect it ran up to six terminals as there are two controlled from the cpu card and four controlled by a terminal controller card. Megan Gentry Former RT-11 Developer +--------------------------------+-------------------------------------+ | Megan Gentry, EMT/B, PP-ASEL | Internet (work): gentry!zk3.dec.com | | Unix Support Engineering Group | (home): mbg!world.std.com | | Compaq Computer Corporation | addresses need '@' in place of '!' | | 110 Spitbrook Rd. ZK03-2/T43 | URL: http://world.std.com/~mbg/ | | Nashua, NH 03062 | "pdp-11 programmer - some assembler | | (603) 884 1055 | required." - mbg | +--------------------------------+-------------------------------------+

26 years, 3 months

1
0
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PDP-11/23 deskside machine

by mbg＠world.std.com

>Doesn't sound like a huge amount of ram to me as my Data General Mini has >8mb onboard. Now that is a BIG ram card! Remember that the max physical memory on Qbus is 4mb... >Does RT11 have: > >Virtual Memory? Depends on which monitor you are running... the SJ(SB) and FB monitors only use 28kw (56kb)... that is all there is for the OS and user programs. Any additional memory *can* be used as a fast disk volume. Programs should not touch the memory mapping registers, though they can (RT allows one to shoot one's self in the foot) The XM monitor takes over the memory management of the machine and provides system services to allow programs access to all the rest of memory -- but programs have to be written specially to make use of it, otherwise they exist in a 32kw virtual address space. >Networking? Not integral... there was DECnet/RT, but that was only Phase III, and no Ethernet. It was because of this that I wrote a piece of networking software for RT machines specifically (check my web page). There is a package from DECUS which provides a TCP/IP stack... You can find it through www.trailing-edge.com (or is it metalab.unc.edu that has it). Anyway, I think it is decus package 110939 (but I might be wrong). >How do I run it? I can do dirs and type files etc but I really need some >docs on the operating system to get anywhere with it. Thanks for the >reply! -- Try HELP... it will give you the commands available. Unlike MS/DOS and Windows, which don't come with any program development tools, RT is an execution environment *and* a development environment... the tools you need to write your own programs come with the distribution -- an assembler (MACRO), a linker (LINK), a module librarian (LIBR) and several debuggers (ODT, VDT, DBG). Megan Gentry Former RT-11 Developer +--------------------------------+-------------------------------------+ | Megan Gentry, EMT/B, PP-ASEL | Internet (work): gentry!zk3.dec.com | | Unix Support Engineering Group | (home): mbg!world.std.com | | Compaq Computer Corporation | addresses need '@' in place of '!' | | 110 Spitbrook Rd. ZK03-2/T43 | URL: http://world.std.com/~mbg/ | | Nashua, NH 03062 | "pdp-11 programmer - some assembler | | (603) 884 1055 | required." - mbg | +--------------------------------+-------------------------------------+

26 years, 3 months

1
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PDP-11/23 deskside machine

by allisonp＠world.std.com

<This evening I accidentally aquired a PDP-11/23 (model # 11E23-FE). It <has RD-52A hard disk and dual floppies like the ones on a Rainbow. sounds like a BA23 with a PDP-11/23 in it. There are many varients of the 11/23 cpu and you need a handle number and boot page info. <What can I do with it? It does boot and is running RT11 with 512k of ram. First off it's a computer, you can do whatever computers do. More ram? By PDP-11 standard 512k is quite enough to be very useful and even a large system. More memory is in the form of boards assuming the is space in the backplane for it. <It appears to have a fault. It often runs for just a few minutes then <drops to a @ prompt and starts spitting out strings of ? marks endlessly. <Is this a failure anyone is familiar with? How can I tack more ram on it? May be a problem with the terminal not the PDP-11. Some terminal emulators if hit with the wrong stuff will spew crap. The PDP-11 you have likely has halt on BREAK enabled. <The machine is is fairly good condition and appears complete. -- While you supplied only a cursory description, it sounds like a nice machine. Allison

26 years, 3 months

2
2
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HP 85 tapes / TU58 tapes

by hofmanwb＠worldonline.nl

Hi, If you ask such questions, please state where you are located. As for the questions, sorry, not interested, but thanks anyway for asking. Wim Hofman ---------- > From: Jerome Fine <jhfine(a)idirect.com> > To: classiccmp(a)classiccmp.org > Subject: HP 85 tapes / TU58 tapes > Date: Thursday, March 23, 2000 6:34 AM > > I have a friend who may be selling some of his TU58 / HP 85 > tapes. Is there anyone who wishes to trade and PDP-11 Qbus > hardware. I am also looking for a SONY SMO S501 or > compatible magneto optical drive and cartridges (512 bytes per > sector). >

26 years, 3 months

2
1
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DEC ADV11-A A/D Converter

by allisonp＠world.std.com

<> Or, wouldn't it work to just use a Q18 backplane which doesn't bus BDAL21 <> I would think that even the 11/73 CPU would be OK then, as long as you do <> mind living with 248 KB memory... < <Or maybe you could put the CPU/RAM/DMA peripherals in a Q22 backplane and <then link that to a Q18 backplay with the ADV11 card in it. If you like, <you could connect BDAL18-BDAL21 between Qbus In and Qbus Out on that <backplane, so that you could have more Q22 backplanes 'dowstream' of it. You can but the collective system will be the least of the two and not additive on items like address bus width. Likely that would have wraparound if enough memory or a non BBS7 compatable IO. If a bord is only Q16 or Q18 the options are mod it if possible for q22 or restrict the bus useage to the level of the least board. Allison

26 years, 3 months

2
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PDP-11/23 deskside machine

by allisonp＠world.std.com

<I guess I must have just gotten lucky to get it to boot those two times. <This is what the machine does <most> of the time. < <KDF11B-BE ROM V0.9 < < 512KB MEMORY <9 STEP MEMORY TEST < STEP 1 2 ERR RAP <173714 <@ 173714 is the address at which the boot selftest program failed. not in ram as 173xxx, is the boot/room page. The count down is each specific test either you get a memeory test error something else. Assumeing the board and rom are ones I know a stop at that address means a NO was types on the terminal duriing console test! To be sure we'd need to know the board handle numbers and rom numbers. to gove that answer I assumed 11/23+ M8189 cpu card, but the message appears to be for an 11/23B cpu/rom set. My guess is you have a bum tube! Also don't apply PC troubleshooting rules to a PDP-11, you'll make youself nuts! <Does this mean that the ram card is bad at a given location? If so, there <is no reason I can't replace the ram on the card with a desoldering iron. <I would like to socketize the ram but I don't think there is enough room <between cards to make that happen so I'll have to solder them directly to <the board and pray I have no more failures. You can, it's possible, you have no clue yeat if it's bad ram. <Is the above 6digit number the location of the failed bit/byte of memory? No, it's a location in rom where the program failed. Allison

26 years, 3 months

1
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teletype wanted.....

by pete＠dunnington.u-net.com

On Mar 23, 16:05, Cameron Kaiser wrote: > They're black, about the size of (spit) a Windows CE box, I guess. It folds > open to reveal a keyboard with red, orange and burgundy-ish keys, and then a > single row 40?-character LCD with a "summary of commands" below that (in > Dutch, not much good to me). Does this ring any bells? Hmm... not really -- it's not quite what I thought. Teletext and Viewdata normally use colour, chunky graphics (each character cell is divided into a 2 x 3 mosaic grid), and a 40 x 25 character screen. So either this is some really simple device, or that's just a status display: is there any socket anywhere that could be a video or TV connector? Serial connector? Any others? What's marked on the keys? > I'm particularly interested in figuring out how to talk to them *without* > having one unit on one end, like, say, have my workhorse C128 talk to them, > upload and download from them, etc. > > I'm confident the baud rate would be low enough for the Commodore to handle > a transfer, but I'm not sure if a regular modem and the Text Tell could even > communicate (using the same modulation, etc.) I'm afraid I don't know much > about telecom standards, so the V.23 note went over my head. :-( If it's European, it will use CCITT tones rather than Bell tones (I'm assuming it's simple FSK modulation). The V23 standard is rather like Bell 202 (V23 uses 2100/1300Hz and 202 uses 2200/1200Hz); half-duplex except that it has a modulated 75 baud back-channel, while Bell 202 has a 5 baud CW back-channel, a 387Hz tone keyed on and off for signalling. The answer tones are slightly different too. However, there's a small chance it might be V21, which is 300 baud full duplex. Again, though, CCITT V21 uses different tones to Bell 103. As an aside, when viewdata was popular over here, there were low-cost adapters and software for lots of common machines, including Commodores. > ::Ob.pedantry: it would be Viewdata (comms channels), not teletext > ::(broadcast). > > *blush* :-) I'll let you off -- lots of people don't know the difference :-) -- Pete Peter Turnbull Dept. of Computer Science University of York

26 years, 3 months

2
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FOCAL language reference manual?

by paulrsm＠ameritech.net

Thanks, Tim, I was actually hoping for a FOCAL language reference manual. I started learning computers with a KIM and machine code. I did a little work with FOCAL on the KIM but my memory is very hazy about the language itself. ---------- > From: CLASSICCMP(a)trailing-edge.com > To: classiccmp(a)classiccmp.org > Subject: RE: FOCAL (was: KIM/6502 code) > Date: Thursday, March 23, 2000 12:27 PM > > I hope this helps. If none of these packages meets your needs, you > might ask again for your specific platform(s). Enjoy!

26 years, 3 months

1
0
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DEC ADV11-A A/D Converter

by mbg＠world.std.com

>That's kind of what I thought it meant :^( Guess I really will have to >get the PDP-11/23 up and running if I want to play with this board. Make sure it is a 11/23, not 11/23+, and make sure it is a Rev.A board or it too will be looking at BDAL18... Megan Gentry Former RT-11 Developer +--------------------------------+-------------------------------------+ | Megan Gentry, EMT/B, PP-ASEL | Internet (work): gentry!zk3.dec.com | | Unix Support Engineering Group | (home): mbg!world.std.com | | Compaq Computer Corporation | addresses need '@' in place of '!' | | 110 Spitbrook Rd. ZK03-2/T43 | URL: http://world.std.com/~mbg/ | | Nashua, NH 03062 | "pdp-11 programmer - some assembler | | (603) 884 1055 | required." - mbg | +--------------------------------+-------------------------------------+

26 years, 3 months

4
4
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DEC ADV11-A A/D Converter

by pete＠dunnington.u-net.com

On Mar 23, 16:33, healyzh(a)aracnet.com wrote: > Well, I know it's a /23, but I don't know the rev, knowing my luck it's not > a Rev A. I'll have to check, thanks for the warning! > > <Sigh> I gather these things would work in a 16-bit backplane such as my > /03's? Yup, that's what they were designed for. -- Pete Peter Turnbull Dept. of Computer Science University of York

26 years, 3 months

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teletype wanted.....

by pete＠dunnington.u-net.com

On Mar 23, 13:40, Cameron Kaiser wrote: > Speaking of teletypes, I ended up with a matching set of Philips TX-1000 > Text Tells which are, I guess, meant for teletext transfer over phone lines. > (The manual and the machines are Dutch.) Anyone ever dealt with these? > Know the communication protocol, or are they just like any other traditional > modem when they transmit/receive? The type number looks familiar, but I can't be certain. What do they look like? I expect they'll be V23 Mode 2 (1200 baud FSK receive using 2100/1300Hz, 75 baud FSK transmit using 450/390Hz CCITT tones). If they're what I think they are, they can be programmed with a number to dial, a user ID and a (numeric) password which is sent on receipt of a ctrl-E (ENQ) from the remote end, but it should also be possible to use them manually. Ob.pedantry: it would be Viewdata (comms channels), not teletext (broadcast). -- Pete Peter Turnbull Dept. of Computer Science University of York

26 years, 3 months

2
1
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DEC ADV11-A A/D Converter

by pete＠dunnington.u-net.com

On Mar 23, 14:31, Chuck McManis wrote: > You mean like "this board isn't compatible with a 22bit backplane" kinds of > things. (which it isn't BTW, that's what the note is about BDAL18 is > address line 18 which is called BC1 on 18 bit backplanes.) > > I'm not sure how you would use it in a system with a 22 bit backplane. Even > if you pulled the address line off the back plane the board's CSR registers > would show up in memory space and you would have bus contention. I don't believe that's true -- that board uses BBS7 to decode I/O space, so it should appear at the correct address. The only problem is BC1, which, like other "unused" contacts, is grounded (presumably to reduce noise). Just cut the track from the BC1 finger. The ADV11 is listed as "restricted compatibility", not "incompatible". -- Pete Peter Turnbull Dept. of Computer Science University of York

26 years, 3 months

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Almost free 2-port and 4-port fanouts, IEEE 802.3 compliant, Ethernet Version 1.0 and 2.0 compatible AUIs

by pete＠dunnington.u-net.com

On Mar 21, 23:05, Allison J Parent wrote: > > <I don't really see how the fanout units on offer (or my unsuccessful > <back-to-back device) could do that -- the termination isn't in the > <transceiver or fanout unit, it's a resistor on the end of the cable. > < Anyway, it would still only be one termination domain. Or maybe I've > <misunderstood what you mean? If you mean my back-to-back transceiver idea > <yes, if it had worked, you could use it to split a termination domain into > <two, just like a two-port repeater, or a very simple bridge (except a > <bridge usually separates collision domains too). > > Anyone ever heard of a DELNI? Ok, it was an 8 port AUI to AUI with a 9th > for AUI to h4000 fat eithernet cable. Popular use was for cobbing 4-7 > system together locally if you didn't have the BIG backbone. Logial > equivilent of a 8 port hub used for 10bt. Yes, never knowingly used one, but I've seen them. 3Com made an 8-port(? or 6?) AUI repeater -- one of my friends used one as his hub for a while, I believe. -- Pete Peter Turnbull Dept. of Computer Science University of York

26 years, 3 months

13
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teletype wanted.....

by acierno＠mindspring.com

Hi everyone.... I tried to post the message before but never saw it posted so excuse me if you see this twice. I'm trying to find a teletype to add to my KIM-1- if anyone has one that they are willing to part with ( for a reasonable price) or knows anyone who is selling one please let me know.I've checked the obvious places (e-bay-hell) and have not yet seen one. mark ------- ICQ 40439199 http://www2.msstate.edu/~mja2

26 years, 3 months

3
2
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FOCAL (was: KIM/6502 code)

by CLASSICCMP＠trailing-edge.com

>Does anyone know if any FOCAL (DEC originals or otherwise) documentation is >online? The DECUS PDP-8 Focal sources (in PAL10) are available. FOCAL.PA begins with: /**** FOCAL 5/69 **** /E.A.TAFT - REVISION OF FOCALW 8/68 /EAT/ 25-JUL-72 /ASSEMBLY INSTRUCTIONS FOR DECUS VERSION: /INPUT FILES: / FOCAL.569 FOCAL LANGUAGE PROCESSOR / FLOAT.569 FLOATING POINT PACKAGE / EXTEND.569 EXTENDED FUNCTION PACKAGE / 2USER.569 2-USER OVERLAY What I have is in the "nickel" PDP-8 DECTAPE archive rescued by me from the University of Indiana several years ago. The Focal stuff, in particular, is on the web at: http://www.trailing-edge.com/~shoppa/focal/ If you were asking about FOCAL-10 (for a PDP-10), this is available on the web as well, from the home to all good software that's PDP-10 related: http://pdp-10.trailing-edge.com/www/lib10/0462/ If you want the PDP-11 (specifically, for RT-11) sources, you can find this at the Metalab.unc.edu PDP-11 archives as DECUS entry 11-0447. Go to http://metalab.unc.edu/pub/academic/computer-science/history/pdp-11/ then go into the RT-11 archives, pick the "decus11" directory, and you'll see three 110477 directories (d1, d2, and d3), one for each original floppy. I also have much RSX and DOS-11 FOCAL stuff that's not indexed yet. I hope this helps. If none of these packages meets your needs, you might ask again for your specific platform(s). Enjoy! -- Tim Shoppa Email: shoppa(a)trailing-edge.com Trailing Edge Technology WWW: http://www.trailing-edge.com/ 7328 Bradley Blvd Voice: 301-767-5917 Bethesda, MD, USA 20817 Fax: 301-767-5927

26 years, 3 months

1
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FOCAL (was: KIM/6502 code)

by paulrsm＠ameritech.net

Does anyone know if any FOCAL (DEC originals or otherwise) documentation is online? I am delighted to find someone with this software. I would have been satisfied with a printed hex dump, but if you have the manual and the source code, yee-haw! When you find it please contact me. I'll take photocopies, faxes, scans, .PDF, anything. As far as being "machine-readable", for the KIM that would be paper tape or cassette tape; neither are as useful as a "human-readable" version. I found the Denver Area 6502 Group on the web at www.6502group.com; so far they have not been able to help me with FOCAL. www.6502.org has no leads to it that I could find. I want to get this stuff to run on my Apple IIe. I am interested in any KIM/SYM/AIM/6502 software that folks might have, especially with source code. Anyone have issues of MICRO (the 6502 journal) they want to get rid of? I do have the Best of MICRO, vols 1-3 and a few separate issues (#73-76), plus the MICRO on the Apple vols 1-3. Paul R. Santa-Maria Ann Arbor, Michigan USA paulrsm(a)ameritech.net ---------- > From: Richard Erlacher <edick(a)idcomm.com> > To: classiccmp(a)classiccmp.org > Subject: Re: KIM/6502 code (was ClassicCmp paper tape) > Date: Wednesday, March 22, 2000 08:48 PM > > I don't know that anyone has machine-readables of the FOCAL interpreter that > was cooked up in the Denver Area 6502 group, but I do believe I have a > printed manual and a printed listing of the interpreter. I'm quite certain > that I won't be able to find it until well into spring, however. Now that > many of us have scanners, new life is breathed into software available only > in the printed listings. > > Frankly, I hope someone has machine readable files of these items, but I'm > not aware of them. > > Dick

26 years, 3 months

4
5
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KIM/6502 code (was ClassicCmp paper tape)

by bill_r＠inetnebr.com

>Hi All > I've been resisting putting this out but I've run out >of my resources. I have a real dilemma! > I've been trying to get in touch with Tom Pittman >but I've not had too much success. I have a copy <snip> >The fellow that claimed to have contacted him was >"Bill Richman" <bill_r(a)inetnebr.com>. I have sent him >mail but not gotten a reply. I hate being in this position. >I know that there are a bunch out there that are looking >for this code. Just for the record, I forwarded your information to Tom, as I don't feel comfortable handing out his e-mail address. He replied that he would get back to you shortly. I'll try to remind him tonight. Bill Richman http://incolor.inetnebr.com/bill_r (Home of the COSMAC Elf microcomputer simulator!)

26 years, 3 months

1
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Fwd: [GreenKeys] TTY Diagrams, Specs, BSPs FS

by jfoust＠threedee.com

There's some ASR-33 info in this offer from the Greenkeys list... - John >X-POP3-Rcpt: jfoust@threedee >From: Merz Donald S <merz.ds(a)mellon.com> >To: TTY Friends <greenkeys(a)qth.net> >Subject: [GreenKeys] TTY Diagrams, Specs, BSPs FS >Date: Wed, 22 Mar 2000 16:44:59 -0500 >Sender: owner-greenkeys(a)qth.net >Reply-To: Merz Donald S <merz.ds(a)mellon.com> > >FOR SALE: Teletype Documentation > >Each of these packages is a thick stack of Teletype docs from AT&TCo. There >are 20 >or more docs per set. There may be some duplicates. Condition ranges from >like new >to covered with Teletype oil. Mostly offered for the cost of postage and >aggravation. > >Package 1: Model 28 Bell System Practices. Starts with General Instructions >for installing >the Model 28 ASR and covers all manner of modification kits such as >horizontal and vertical >tabulation, multicopy roll paper, keyboard modifications, etc. This is just >a random set--no >attempt was made to organize these or make a complete set. As-is. $5 >postage-paid. > >Package 2: Model 28 Bell System Practices. Same as #1 except a few less docs >in this set. >$5 PPD > >ASR User Manual photocopy. Old copy of AT&T 1961 ASR user guide. Free with >any purchase. > >Bell System Practices Manual Set for Model 164C1, C2, C3 & C4 Telegraph >Transmission >Measuring Sets. 2 manuals: Description/Principles Of Operation and >Calibration and Test >Methods. Both original and like new. This looks like a nice instrument but I >have never seen >one of these. $8 PPD > >Bell System Practices Manual Set for Model 164C1, C2, C3 & C4 Telegraph >Transmission >Measuring Sets. As above but the "Calibration and Test Methods" manual is a >photocopy. >$6 PPD > >Package 3: Model 28 Wiring Diagrams: A 1" thick stack of un-sorted diagrams. >$5 PPD > >MWO 80-3: Mandatory Modification Work Order For M-28 ASR, KSR & KTR. This is >a >comb-bound set of wiring diagrams and modification instructions dated >August, 1971. I'm >not sure what this set was used for. $5 PPD > >Package 4: This is a polyglot of wiring diagrams for "Multi-voltage >Rectifiers," "High-Speed >TDs," "Selective Calling Systems," "CXB200 & MU43," and much more. A total >of about a >1-1/2" thick pile. $5 PPD > >Package 5: M33, 101C, "Four-Row TWX," wiring diagrams. About 1" thick. $4 >PPD > >Package 6: Dataspeed wiring diagrams, Data Systems Schematics, "Recognizer >Module" >diagrams. About 1" thick. $5 PPD > >Package 7: 48V rectifier, high speed receiving distributor, multi-voltage >rectifier, >isolation repeater and others. About 1" thick. $4 PPD > >Package 8: Model 35 wiring diagrams, specifications for various >modifications and a >couple M35 BSPs. About 1/2" thick. $5 PPD > >Package 9: A reasonably complete set of M33 wiring diagrams on 11x17 paper >plus a >package of various M33 diagrams still in unopened wrappers. About 1" thick. >$5 PPD > >Package 10: Everything you wanted to know about the Model 33 but were afraid >to ask. >This includes a complete set of M33 wiring diagrams and a mostly complete >set of >BSPs for the Model 33. This is really nice. About 2" thick. $24 PPD > >Package 11: BSPs and wiring diagrams for a lot of the early Bell data gear. >Covers 101C, >113A, 202C, 402D, 1001D and many more. Nice. About 1-1/2" thick. $7 PPD > >Contact Don at merz.ds(a)mellon.com > >---- >Submissions: greenkeys(a)qth.net

26 years, 3 months

1
0
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HP 85 tapes / TU58 tapes

by jhfine＠idirect.com

I have a friend who may be selling some of his TU58 / HP 85 tapes. Is there anyone who wishes to trade and PDP-11 Qbus hardware. I am also looking for a SONY SMO S501 or compatible magneto optical drive and cartridges (512 bytes per sector).

26 years, 3 months

1
0
0 0

IBM 5150, am I nuts or what?

by allisonp＠world.std.com

<They show up at flea markets from time to time... I've seen a number <of them at the MIT flea... I have one. Yes, the command PRINT does <so to the integral printer... DISPLAY outputs to the screen. The <tape drive uses the same cartridges as the TU58, though I am not <sure if the formatting is the same... It's DC100 cart and that where it ends. I think tu58 carts may work if bulk erased first. Allison

26 years, 3 months

2
1
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Question about a system

by mbg＠world.std.com

Can anyone tell me a few things about a system: Consider the following machine: VAX6000/400 3 x HSC70 2 x TU79 11 x Exsys disk drives 6 x Microtech disk drives o How big is this machine? o How much might it originally have gone for? o What might it be worth now? I'm not looking for answers like, "Pay me and I'll cart it away." I know someone who has such a machine and is trying to sell it, but I suspect that he is expecting a LOT more for it than it may be worth nowadays... it is 10-12 years old and he recently had it at auction on eBay for a minimum bid of $10000... I gather it did not get any bids... Megan Gentry Former RT-11 Developer +--------------------------------+-------------------------------------+ | Megan Gentry, EMT/B, PP-ASEL | Internet (work): gentry!zk3.dec.com | | Unix Support Engineering Group | (home): mbg!world.std.com | | Compaq Computer Corporation | addresses need '@' in place of '!' | | 110 Spitbrook Rd. ZK03-2/T43 | URL: http://world.std.com/~mbg/ | | Nashua, NH 03062 | "pdp-11 programmer - some assembler | | (603) 884 1055 | required." - mbg | +--------------------------------+-------------------------------------+

26 years, 3 months

3
2
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Toggling in PDP-11 Bootstraps...

by af-list＠wfi-inc.com

Does anyone have any practical advice concerning this, something that might save me a little time/frustration? I'm playing around with some parts to try to learn more about how the system works, and here's what I've got: 22bit qbus backplane 11/73 cpu 1 meg ram various device interface cards (Dilog SQ706A, RQDX3, Emulex TC03, RXV21 clone) I'd like to be able to set up the simplest system possible and try to toggle in a bootstrap. I've played with the ones on metalab (RX01, MSCP) without much real success so far. Trying to boot from the RX01's using the bootstrap code on metalab results in the drive access light coming on, but nothing else happening. Sending a break stops at 1044 every time, the contents of that register is 1776. Trying to boot from the Dilog scsi device #0 (should be DU0, right?) just hangs (again using the MSCP bootstrap on metalab). The MSCP bootstrap is well-commented, so I can see what's going on there...a little hint or push may be all I need to be able to modify it to work for me. The RX01 bootstrap is not commented at all, unfortunately. I know the RXV21 clone is working OK, since I can boot from it with the bootstrap roms on my multifunction card... Thanks, Aaron

26 years, 3 months

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FS: Heath/Zenith Computer system

by KB9VU＠aol.com

Anyone interested in a working H/Z-110 low profile dual processor computer system? CPU, Monitor, Software (CP/M-80, CP/M-86 and MS-DOS), Peripherals, Technical and Operating manuals. Located near St. Louis. Pick up only as it is a load of stuff to ship. Thanks Mike

26 years, 3 months

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KIM/6502 code (was ClassicCmp paper tape)

by paulrsm＠ameritech.net

I've been trying to track down some historical KIM/6502 code for some time. Would you happen to have KIMATH, FOCAL, or Pittman's Tiny BASIC? ---------- > From: mark acierno <acierno(a)mindspring.com> > To: classiccmp(a)classiccmp.org > Subject: need help reading a paper tape.... > Date: Wednesday, March 22, 2000 10:49 AM > > Is there anyone out there who can help me. I have a paper tape (for the > KIM-1) and I need it read. I dont care too much what format I get back - > disk, paper print out, ect. would all be fine. I thought I had arranged to > have it read by a commercial classic computer support person --- but they > now tell me that it will be quite some time before they can get to my > request. The tape has real historical value ( although not much real $$ > value) and I would like to get it read as soon as possible. > > If you can help me or know of someone who can -- please e-mail me. > > thank you > > mark acierno > > ------- > > ICQ 40439199 > http://www2.msstate.edu/~mja2 >

26 years, 3 months

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Are you sure the 6550 is dead? (was: Mos Technology RAM wanted)

by pete＠dunnington.u-net.com

On Mar 22, 23:56, Tony Duell wrote: > You _honestly_ think that a 22V10 (or whatever) is simpler, cheaper, and > easier to use than a couple of 74LS20s? You know, a 22V10 has 24 pins, > and the 2 74LS20s have 28. That's only 4 more pins to solder. And there's > no requirement to program a chip if you use the '20s. No, but I can make more choices with the 22V10 -- I want to be able to switch ROM sets (between the original on the motherboard and possibly two on the expansion) and RAM sizes and that would need a little more effort with the TTL, because I want to *replace* the 74154, not add to it. -- Pete Peter Turnbull Dept. of Computer Science University of York

26 years, 3 months

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2532 EPROM pin-out

by pete＠dunnington.u-net.com

On Mar 22, 17:32, Bill Sudbrink wrote: > > > Could some kind soul post the pin-out > > > of a 2532 4Kx8 EPROM? > > > > Which one TI or moto or ? > > Egad! They have different pin-outs by manufacturer?!?! There's an "industry-standard" arrangement, and a JEDEC arrangement. TI, almost uniquely, chose the "unusual" one for 2532s. > Uh... it has an 'S' on it that looks like two 'C's > hooked together, one upsidedown. Is that Signetics? Sounds like it... here you go: Intel, Motorola, Signetics, Hitachi etc 2532/2732: A7 1 24 Vcc A6 2 23 A8 A5 3 22 A9 A4 4 21 A11 A3 5 20 ~OE/Vpp A2 6 19 A10 A1 7 18 ~CE A0 8 17 D7 D0 9 16 D6 D1 10 15 D5 D0 11 14 D4 GND 12 13 D3 Texas TMS2532, Hitachi HN462532 (JEDEC): A7 1 24 Vcc A6 2 23 A8 A5 3 22 A9 A4 4 21 Vpp A3 5 20 ~CE/~PGM A2 6 19 A10 A1 7 18 A11 A0 8 17 D7 D0 9 16 D6 D1 10 15 D5 D0 11 14 D4 GND 12 13 D3 -- Pete Peter Turnbull Dept. of Computer Science University of York

26 years, 3 months

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2532 EPROM pin-out

by pete＠dunnington.u-net.com

OOPS I just realised I listed the Motorola 2532 as the same pinout as the Intel 2732; it's actually the same as the Texas 2532. Sorry! -- Pete Peter Turnbull Dept. of Computer Science University of York

26 years, 3 months

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Almost free 2-port and 4-port fanouts, IEEE 802.3 compliant, Ethernet Version 1.0 and 2.0 compatible AUIs

by pete＠dunnington.u-net.com

On Mar 22, 19:47, Eric Smith wrote: > Pete Turnbull <pete(a)dunnington.u-net.com> wrote: > > I'm not sure these are repeaters, though. So a signal that's sent from a > > station on one of the AUI interfaces would go onto the wire, but I'm not > > sure that it would get back (directly) to the other AUI interface(s). > > It had better, or you don't have a functional ethernet, because two of > the nodes can't talk to each other. Also, the nodes have to be in the > same collision domain, so there's not really anything to be saved by > using some wacky scheme where the nodes can't talk to each other. I have seen such schemes. The small objects sold as "passive" 2-port or 3-port 10baseT hubs work like that, and two adjacent nodes can't talk directly to each other. It rarely matters. Well, I guess that depends on your network setup, actually! If you've not seen them, they look like a little black (usually) box with two RJ45 sockets on one end (into which you connect, say, two workstations or PCs) and a short RJ45 cable at the other end (which you connect to a real hub, switch, or a server). They're intended to let you connect more clients than you have hub ports. It's not a question of using some wacky scheme; rather a question of simplicity: if you want the adjacent nodes to talk to each other, you need to have the Tx from each connected to the Rx of the other. That's easy to arrange with just two 10baseT ports (that's all a crossed cable does, after all), but with three (as in the so-called passive hubs) you would end up with *everything* connected together -- or you need some electronics to isolate and filter (as in a proper hub/repeater). The passive units don't have that, so the two RJ45 sockets can each talk/listen to the RJ45 cable, but not to each other. There's a similar problem connecting three or more AUI ports; it's further complicated by the collision detect, which is normally done in the transceiver. Now if it were a multiport repeater, I'd have expected all the AUI connectors to be the same gender (since they'd be functionally equivalent). But the fanout units have one of a different gender, so I suspect that either they use a similar scheme to the passive hub I described, or they actually have more electronics than a normal repeater (or at least arranged rather differently), in order to get the signals in the right arrangement to drive a transceiver instead of a drop cable to another AUI. -- Pete Peter Turnbull Dept. of Computer Science University of York

26 years, 3 months

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2532 EPROM pin-out

by bill＠chipware.com

Could some kind soul post the pin-out of a 2532 4Kx8 EPROM? Thanks, Bill

26 years, 3 months

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Are you sure the 6550 is dead? (was: Mos Technology RAM wanted)

by pete＠dunnington.u-net.com

On Mar 22, 14:52, Philip.Belben(a)powertech.co.uk wrote: > Expansion box. > > The old PETs don't AFAIK have the internal expansion connector - they have an > edge connector sticking out at one side. Very useful for toggling RESET with a > pair of tweezers! Yes, I know :-) Mine has the edge connector, not the expansion block. > That aside, on this edge connector are brought out most of the block select > lines from the 74154 I mentioned in my previous post. In particular, brought > out are lines 1 to 7, 9, A and B. > > It takes only three four-input AND gates to re-encode any eight of these you > choose into three upper address lines for a 62256. Seems like the hard way to do it... > My suggestion is: disable the select to the upper 4K of memory within your PET, > and encode lines 1 to 7 and 9. This will give you 32K of main memory, several > spare 6550s, and 4K of RAM above the screen. Essentially, you will have a 4K > PET fully expanded. I was actually thinking of replacing the 74154 with a socket, to get access to all the signals I'd want -- I could enable (or not) all the RAM that way, and use the internal ROMs. It would only require one 22V10; and I would prefer to use several ROMs (probably 27256s) for the alternate BASICs. I'd take the data lines from the edge connector, probably. If you look at the PET circuit, you'll see the data lines to the edge connector are buffered, and the control to that buffer is hardwired (via AND gates and an inverter) to several of the SEL block selects from the 74154; similarly, the RAM buffers are hardwired to SEL0 and (via an OR, a NAND, and a link) SEL1. So you can't put replacement RAM on the expansion connector without doing something about that 74154... Plus, the SEL lines relevant to the ROMs aren't present on the edge connector, but they are on the 74154. -- Pete Peter Turnbull Dept. of Computer Science University of York

26 years, 3 months

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AXP vs VAX (was Re: Aaaaahhhh... 'Tis Good to be Back!!!)

by ethan_dicks＠yahoo.com

--- healyzh(a)aracnet.com wrote: > > Ow... that's scary. I am in the process of _finally_ building up this > > AXP133 "no-name" board... > Since you're running Sparc's with 64MB, to give you an idea of what I > consider acceptable performance, I don't consider Solaris 2.6 acceptable in > 64MB, but it's quite nice in 96MB on my Sparc 2. I don't consider 64Mb acceptable if I'm running CDE. It's horrible. Things are sluggish but not painful under OpenWindows. I'd run 96Mb if I could, but I don't have the Sbus expansion card. I used to use a Sparc 5/110 as my primary desktop machine at Lucent, and with 256Mb of memory the only ongoing problem I had was with starting up Netscrape - it took much more than a minute. Once I was in, things were ducky. I could even run ViCE at 200% 6502-emulation speed with no problems. > In the case of OpenBSD I was able to get a Tulip-based 10/100 NIC working > with no problem in the AS200. I *can not* get one working under OpenVMS, it > looks like I need a real DE500 to work under OpenVMS. I bought a real DE500 once, just for this box (not that it runs OpenVMS due to other driver issues). It never left the show with me; I think I set down the bag and walked off. Not the first time, but usually I remember while I'm still in the same aisle. > On the RAM, I *always* check for used True Parity 72-pin SIMMS when I'm > anywhere that has used RAM. Me too. I'm up to five pair of 16Mb and one pair of 4Mb. :-( > You're lucky. The AS500 requires custom RAM, the only way I'm going to get > it more memory is by spending about $500 :^( Ow! Speaking of custom RAM, I notice that on diagnostics, the IPX detects 33bit vs 36bit parity SIMMs. Are there any performance differences? I only have three or four 33bit 16Mb SIMMs. I was just wondering if there were any benefit to take these to 36bit. I plan to use the IPX as our primary DNS server at work, so enhanced reliability is a benefit. -ethan ===== Even though my old e-mail address is no longer going to vanish, please note my new public address: erd(a)iname.com The original webpage address is still going away. The permanent home is: http://penguincentral.com/ See http://ohio.voyager.net/ for details. __________________________________________________ Do You Yahoo!? Talk to your friends online with Yahoo! Messenger. http://im.yahoo.com

26 years, 3 months

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OSI bliss...

by dogas＠leading.net

Wow. Hi everyone. A hot tip, a long drive, lots of digging, and a pocket full of kryptonite turned up an OSI C3C12 yesterday! It's a 4 component system including the CD2 8" floppys, a big CD23 Shugart SA4000 harddrive, and a Hazeltine terminal that's OSI branded (neat.) It sports a 17 slot backplane with a 525, 590, CSS cpu+ (that is cracked), and 3 522's now in it. I found another box of boards that had 2 510's (my favorite), a 555, 2 550's, 2 470's, and 3 520's, and a CA-18E ((on a 550 board)?) that hints at level III networking) Also got a bunch of software like os-65u v1.43 timeshare, ( w/mputil...) Looks like it can handle 3 users maybe. And there are boxes of disks I haven't even gone through yet. The documentation was a wonderful find too. Most of it is preliminary docs of things like the: Ohio Scientific Multiple User Computer System Manual C2-8p Users Manual C3 Setup and Operations Manual (with the C3 Utilities and Demo disks (!!!)) OS-DMS Shugart SA4000 servicing info OS-65u Ref Manual a *huge* binder of tech and sales newsletters and a real cool OSI Servicing Data book for *many* of the osi boards >from 470-594 and cii and cIII systems Then the ghost of classiccmp-past infused and led me back to a dark dusty workbench where I scored 3 boxes of molex connectors that I needed desperately. Oh, I found a Motorola EXORmacs system in the same pile too. yipee! My home is smaller. One happy ccmper signing off... ;) - Mike: dogas(a)leading.net

26 years, 3 months

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AXP vs VAX (was Re: Aaaaahhhh... 'Tis Good to be Back!!!)

by ethan_dicks＠yahoo.com

--- jmd <jmd(a)infinet.com> wrote: > Ethan > I have 1 DEC 205 NIC if you are interested. ISA slot. How much? -ethan ===== Even though my old e-mail address is no longer going to vanish, please note my new public address: erd(a)iname.com The original webpage address is still going away. The permanent home is: http://penguincentral.com/ See http://ohio.voyager.net/ for details. __________________________________________________ Do You Yahoo!? Talk to your friends online with Yahoo! Messenger. http://im.yahoo.com

26 years, 3 months

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Almost free 2-port and 4-port fanouts, IEEE 802.3 compliant, Ethernet Version 1.0 and 2.0 compatible AUIs

by pete＠dunnington.u-net.com

On Mar 22, 0:51, Eric Smith wrote: > Chuck McManis asked: > > I'm confused, aren't these "fan out" units just hubs? > > Aaron Christopher Finney replied: > > These simply provide multiple ports on a single tap. I indicated my > > interest in them for the thick ethernet segment in my garage, as I only > > have 3 transceivers tapped into it at the moment. Physically, they just > > connect to the tapped transciever. > > Which, as Chuck suggests, is a effectively a description of a hub, albeit one > that has AUI interfaces rather than 10-base-T. Ethernet hubs are technically > multiport repeaters, and are subject to all of the topology and distance > limits of repeaters. I'm not sure these are repeaters, though. So a signal that's sent from a station on one of the AUI interfaces would go onto the wire, but I'm not sure that it would get back (directly) to the other AUI interface(s). Anyone know? -- Pete Peter Turnbull Dept. of Computer Science University of York

26 years, 3 months

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AXP vs VAX (was Re: Aaaaahhhh... 'Tis Good to be Back!!!)

by ethan_dicks＠yahoo.com

--- "Zane H. Healy" <healyzh(a)aracnet.com> wrote: > Good Grief! The most any Alpha on my home cluster has is 112MB and my best > Alpha only has 96MB because the RAM is so blasted expensive! I've found > that a Alpha with 80MB is about the same as a VAX with 16MB, and don't even > consider DECwindows in less than 80MB (and you won't see good performance > till 112MB). Ow... that's scary. I am in the process of _finally_ building up this AXP133 "no-name" board I bought a few years ago. Currently, it has 64Mb because parity 16Mb SIMMs are stunningly expensive. I lucked out at the Dayton Computerfest a couple of weeks ago and cleaned a vendor out at $15 per stick. Now my Alpha has 64Mb, my LX will have 64Mb and even my main SPARC-IPX. It's been a memorable experience. ;-) The Alpha has on it an older version of NetBSD. I'm considering upping it to the latest rev or going to RedHat. At the moment, I can't seem to get the 3C509 working, but I'd rather use something a little more advanced like a Tulip-based 10/100 NIC or even a 3C905C (since we have them around the office). One other piece of fun with this "no-name" board was locating compatible cache RAM. I stripped several 486s before I found a set of chips that would let the Alpha come up. The manual mentions a list of preferred vendors. Believe it. -ethan ===== Even though my old e-mail address is no longer going to vanish, please note my new public address: erd(a)iname.com The original webpage address is still going away. The permanent home is: http://penguincentral.com/ See http://ohio.voyager.net/ for details. __________________________________________________ Do You Yahoo!? Talk to your friends online with Yahoo! Messenger. http://im.yahoo.com

26 years, 3 months

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Are you sure the 6550 is dead? (was: Mos Technology RAM wanted)

by Philip.Belben＠powertech.co.uk

> I was never a service tech, but here in Ohio, the _only_ static PETs I've > ever seen were 6550-based. I didn't know there were any with 2114s until > I joined this list. It explains another Tramiel story. When the VIC-20 > was being designed, Jack told his engineers that he didn't care how much > memory the new computer used, but it had better take the 2114 chips that > C= had a warehouse full of. Never heard that story before. PETs up to and including 8096 used a couple or more of 2114s for video RAM, though. >> The old PETs don't AFAIK have the internal expansion connector - they have an >> edge connector sticking out at one side. Very useful for toggling RESET with >> a pair of tweezers! > > Don't miss! If I've got to the point where I need to hit RESET, it doesn't matter. Occasionally I corrupted I/O registers and disabled the interrupts that serviced the keyboard. You'd better not miss when toggling IRQ with the tweezers! Philip. ********************************************************************** This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system manager. This footnote also confirms that this email message has been swept for the presence of computer viruses. Power Technology Centre, Ratcliffe-on-Soar, Nottingham, NG11 0EE, UK Tel: +44 (0)115 936 2000 http://www.powertech.co.uk **********************************************************************

26 years, 3 months

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Are you sure the 6550 is dead? (was: Mos Technology RAM wanted)

by ethan_dicks＠yahoo.com

--- Philip.Belben(a)powertech.co.uk wrote: > > > > > > Yes, I'm sure that's true. The 2114 PETs are rarer, but I can't see any > > If you used to service the things, I have to take your word for it, but I've > seen several with 2114s and I don't think I've seen any with 6550s. Oh well. I was never a service tech, but here in Ohio, the _only_ static PETs I've ever seen were 6550-based. I didn't know there were any with 2114s until I joined this list. It explains another Tramiel story. When the VIC-20 was being designed, Jack told his engineers that he didn't care how much memory the new computer used, but it had better take the 2114 chips that C= had a warehouse full of. > The old PETs don't AFAIK have the internal expansion connector - they have an > edge connector sticking out at one side. Very useful for toggling RESET with > a pair of tweezers! Don't miss! -ethan ===== Even though my old e-mail address is no longer going to vanish, please note my new public address: erd(a)iname.com The original webpage address is still going away. The permanent home is: http://penguincentral.com/ See http://ohio.voyager.net/ for details. __________________________________________________ Do You Yahoo!? Talk to your friends online with Yahoo! Messenger. http://im.yahoo.com

26 years, 3 months

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need help reading a paper tape....

by acierno＠mindspring.com

Is there anyone out there who can help me. I have a paper tape (for the KIM-1) and I need it read. I dont care too much what format I get back - disk, paper print out, ect. would all be fine. I thought I had arranged to have it read by a commercial classic computer support person --- but they now tell me that it will be quite some time before they can get to my request. The tape has real historical value ( although not much real $$ value) and I would like to get it read as soon as possible. If you can help me or know of someone who can -- please e-mail me. thank you mark acierno ------- ICQ 40439199 http://www2.msstate.edu/~mja2

26 years, 3 months

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IBM 5150, am I nuts or what?

by ethan_dicks＠yahoo.com

--- Bob Stek <bobstek(a)ix.netcom.com> wrote: > For all the pissing and moaning today about IBM and Microsoft, let's face > it - the original IBM and then the XT are collectibles... > What can you do with them? Does the term "boat anchor" have any meaning for > you? I have a 5150 that is serving in its original capacity as a user-interface for a Northwest Instruments bus analyzer box. The analyzer has a 68000 pod and captures the last 4096 bus accesses. I used it once to prove to our engineer that his 68010 design on our VAXBI COMBOARD(R) was screwing up byte accesses (he swapped UDS and LDS causing byte reads to pick up whatever happened to be the last upper or lower byte through the buffers - writes worked perfectly because the 680x0 writes the same data to D0-D7 as D8-D15 on a byte access). The 5150 itself came with an IBM-badged Epson something-X-80 printer, an original mono card (the monitor is long since dead) and some form of multi-expansion card (not an AST six-pack, but something like it). It also has some form of 10-20Mb hard disk in it. I realize this isn't how IBM shipped them, but it is how Northwest Instruments did. ISTR the price paid way back when was $5K for the PC and $20K for the analyzer, but the analyzer price _might_ have included the PC. We boxed the whole thing up at work in a gutted VAX-11/725 cabinet. At one point, we used 11/730s as production machines (linking binaries for our product under a non-primary version of VMS) and it was cheaper to buy 11/725s and harvest parts than it was to buy individual boards for the 11/730 (and a lot cheaper than DEC maintenance). I don't have my working 11/725 anymore, but it was a fun machine when I had it. With a bit of boot tape optimization, it came up almost as fast as our 11/750. -ethan ===== Even though my old e-mail address is no longer going to vanish, please note my new public address: erd(a)iname.com The original webpage address is still going away. The permanent home is: http://penguincentral.com/ See http://ohio.voyager.net/ for details. __________________________________________________ Do You Yahoo!? Talk to your friends online with Yahoo! Messenger. http://im.yahoo.com

26 years, 3 months

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Are you sure the 6550 is dead? (was: Mos Technology RAM wanted)

by Philip.Belben＠powertech.co.uk

> Yes, I'm sure that's true. The 2114 PETs are rarer, but I can't see any If you used to service the things, I have to take your word for it, but I've seen several with 2114s and I don't think I've seen any with 6550s. Oh well. [...] > Oh, I did that to check that it was definitely the RAM and not anything > else, long before I posted my request. I could fix about anything else on OK, so you are sure that it is the chip that's dead. I still think it's a fault that affects the whole chip... > The PET determines the RAM size by reading and writing a byte in every > block and assumes it has found the top of RAM when it gets an error. It > was just coincidence that one of the 5th pair was the one to go. So I now > have a 7K PET, because I put the faulty IC in the top pair. It reports > 6143 bytes free. I'm afraid I have a minor quibble here. To write a byte to every block would be pointless as a memory diagnostic, although it would indeed find the top of RAM. However, the PET actually writes two test patterns to EVERY BYTE. PETs I've seen with dodgy RAM come up with really strange numbers of bytes free, not just multiples of 256 minus 1. Early PETS like yours (and my first one) leave 36 in each location when they've finished. Goodness knows why. Later PETS seem to be using 01010101 and 10101010 as test patterns, since they leave 170 (decimal) in each location. (As an aside: vintage PET users, on old machines at least, will have come across the corrupted links in the program listing, which instead of pointing to the next line point somewhere silly. The most common crash then is a program listing that just prints $ signs and doesn't respond to the stop key... Can't remember what keyword 170 gives you on the newer machines, though. When I was involved in developing an adventure game for the BBC micro, we typed a lot of the text on an 8032 (can't remember why). 170 ended up as the token for "HA" when we compressed it. Result - a corrupted address made the machine laugh at us. No, this was not intentional!) ********** Expansion box. The old PETs don't AFAIK have the internal expansion connector - they have an edge connector sticking out at one side. Very useful for toggling RESET with a pair of tweezers! That aside, on this edge connector are brought out most of the block select lines from the 74154 I mentioned in my previous post. In particular, brought out are lines 1 to 7, 9, A and B. It takes only three four-input AND gates to re-encode any eight of these you choose into three upper address lines for a 62256. On my PET I used 2 to 7, 9 and A, and got 32K main memory (including the 8K it already had) plus 8K of RAM in ROM space, above the screen memory. My suggestion is: disable the select to the upper 4K of memory within your PET, and encode lines 1 to 7 and 9. This will give you 32K of main memory, several spare 6550s, and 4K of RAM above the screen. Essentially, you will have a 4K PET fully expanded. Power, as always, comes from the second cassette port... Note block select 0 is NOT present on the expansion connector, so you can't readily disable all the internal RAM. Philip. ********************************************************************** This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system manager. This footnote also confirms that this email message has been swept for the presence of computer viruses. Power Technology Centre, Ratcliffe-on-Soar, Nottingham, NG11 0EE, UK Tel: +44 (0)115 936 2000 http://www.powertech.co.uk **********************************************************************

26 years, 3 months

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IBM 5150, am I nuts or what?

by SUPRDAVE＠aol.com

In a message dated 3/22/00 4:40:10 AM Eastern Standard Time, mikeford(a)socal.rr.com writes: > I now have a few IBM 5150 Personal Computers, latching on to the nicest > ones today along with I think the correct original keyboards. I have to > wonder if I am not perhaps getting a little dotty in my old age. What the > heck am I going to do with them? > > Anybody else have some? What can they do? > > How about a 5100 (sounded like something I might want to hoard if I see one)? > ive had a 5150 apparently unused in its box for about 2 years now. perfect condition and even has the cardboard shipping disks in its drives! didnt get the documentation though. just recently i found a 5160 in its box as well. its a later model with half height floppy drive. it does have a few cards installed, but machine is extremely clean and no dusty insides. i assume it was purchased as a spare and seldom used, if it ever was. i also have that original pc keyboard with its crappy layout still in its box. DB Young ICQ: 29427634 view the computers of yesteryear at http://members.aol.com/suprdave/classiccmp/museum.htm --You can lead a whore to Vassar, but you can't make her think--

26 years, 3 months

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Are you sure the 6550 is dead? (was: Mos Technology RAM wanted)

by pete＠dunnington.u-net.com

On Mar 21, 21:48, Tony Duell wrote: > > else, long before I posted my request. I could fix about anything else on > > the PET, but I draw the line at grinding the top off to poke at individual > > flip-flops in an IC :-) FWIW, the first job I had in > > Really, kids these days..... Well, I once ripped the metal lids off a few ceramic DRAMs to use them as optical image sensors (ISTR an article in BYTE, I think it was, years ago about that), and there's a story about how Ferranti designers determined that a particular ULA design worked perfectly if only you could get at the gates with a microprobe to add a pullup in a certain place, but these SRAMs are plastic and I've run out of fuming nitric acid :-( -- Pete Peter Turnbull Dept. of Computer Science University of York

26 years, 3 months

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Are you sure the 6550 is dead? (was: Mos Technology RAM wanted)

by pete＠dunnington.u-net.com

On Mar 21, 23:04, Allison J Parent wrote: > If I knew pinout I could find an industry part that would work save for > pinout or package. No offence, but if I can't get a drop-in replacement, I'd rather leave the original as-is, and build my little expansion board. The idea was to disable internal RAM (and perhaps ROM) and put a decoder on the expansion connector (the old PETs have an internal expansion connector). The expansion would carry up to 32K RAM, and one or more EPROMs holding different versions of BASIC (the original doesn't work properly with IEEE-488 disks and some other devices). Anyway, here's the pinout: MCS6550 1024 x 4 SRAM A0 1 22 Vss (0V) A1 2 21 CS1 A2 3 20 CS2 A3 4 19 ~CS3 A4 5 18 ~CS4 A5 6 17 Vdd (+5V) phi2 7 16 D3 A6 8 15 D2 A7 9 14 D1 A8 10 13 D0 A9 11 12 R/~W -- Pete Peter Turnbull Dept. of Computer Science University of York

26 years, 3 months

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Almost free 2-port and 4-port fanouts, IEEE 802.3 compliant, Ethernet Version 1.0 and 2.0 compatible AUIs

by ethan_dicks＠yahoo.com

--- Bill Dawson <whdawson(a)mlynk.com> wrote: > Hello again, > > Well, due to the overwhelming response for these 2-port and 4-port Ehernet > fanouts (actually, none) I'm posting this one more time. Interesting devices if you need one, and quite inexpensive. > Perhaps someone can tell me, on list, why no one on this list has any > interest in these. Maybe everyone is saving their money for iOpeners d8^) I have plenty of vintage networking equipment, but I also have plenty of 10BaseT and 10Base2 transceivers to bring them onto my network. Eventually, I'd like to have a single segment of 10Base5 cable, but just for the antiquity factor. I only have one vampire tap at the moment (on a transceiver that has interchangable media connectors - I have two bases and one actual tap). It's not critical, so as I spot really ancient Ethernet stuff I grab it, but items that are _that_ old don't float by as often as they used to. -ethan ===== Even though my old e-mail address is no longer going to vanish, please note my new public address: erd(a)iname.com The original webpage address is still going away. The permanent home is: http://penguincentral.com/ See http://ohio.voyager.net/ for details. __________________________________________________ Do You Yahoo!? Talk to your friends online with Yahoo! Messenger. http://im.yahoo.com

26 years, 3 months

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Are you sure the 6550 is dead? (was: Mos Technology RAM wanted)

by pete＠dunnington.u-net.com

On Mar 21, 23:04, Allison J Parent wrote: > <> Are these single voltage or multiple? 4k? 22pin? sounds like the > <> semi-4600 and NEC D410 parts, a 4k pseudostatic 200ns cycle and access > <> under 120ns. I've got a rat load of upd410s. The moto part number > <> doesn't compute though. > < > <uPD410 is 18-pin 0.3" width, 4k x 1, with one ~CE line (the MOS Technology > <MCS6550 has 2 ~CS and 2 CS lines and it's 0.4" wide). I can't find any > <data on a 4600 but I assume it's similar. > uPD410 .4" 22pin three voltage 4Kx1, seperate din and dout, CE and CS/ three > voltage pseudostatic. replaces Semi-4200 and 4402, fastest version to 80ns > access. (it was a screamer for 1978). Oops, I misread the data book -- you're right of course, uPD410 is .4" -- Pete Peter Turnbull Dept. of Computer Science University of York

26 years, 3 months

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Almost free 2-port and 4-port fanouts, IEEE 802.3 compliant, Ethernet Version 1.0 and 2.0 compatible AUIs

by allisonp＠world.std.com

<I don't really see how the fanout units on offer (or my unsuccessful <back-to-back device) could do that -- the termination isn't in the <transceiver or fanout unit, it's a resistor on the end of the cable. < Anyway, it would still only be one termination domain. Or maybe I've <misunderstood what you mean? If you mean my back-to-back transceiver idea <yes, if it had worked, you could use it to split a termination domain into <two, just like a two-port repeater, or a very simple bridge (except a <bridge usually separates collision domains too). Anyone ever heard of a DELNI? Ok, it was an 8 port AUI to AUI with a 9th for AUI to h4000 fat eithernet cable. Popular use was for cobbing 4-7 system together locally if you didn't have the BIG backbone. Logial equivilent of a 8 port hub used for 10bt. Allison

26 years, 3 months

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Are you sure the 6550 is dead? (was: Mos Technology RAM wanted)

by allisonp＠world.std.com

<Yes! I just repacked my lidless 4116 chips. I only ever got as far as <cementing slide-mount covers on one and sticking it in an Apple II at the <top of RAM and demonstrating the effect by clearing video RAM then lifting <the lid. Many bits sparkled in when light shone on the chip. Many years ago far away... A bunch of us took the lid off a NEC 4116 and focused an image on to one segment of the matrix and then used a apple as a raster box to play the bits to a matix on the screen. lousy res being 128x128ish and no gray scale but high contrast images under infared light really were discernable. Oh, refresh rate (read rate) was basically the "shutter speed" so really slow scans were quite sensitive. Allison

26 years, 3 months

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Are you sure the 6550 is dead? (was: Mos Technology RAM wanted)

by allisonp＠world.std.com

<> Are these single voltage or multiple? 4k? 22pin? sounds like the <> semi-4600 and NEC D410 parts, a 4k pseudostatic 200ns cycle and access <> under 120ns. I've got a rat load of upd410s. The moto part number <> doesn't compute though. < <uPD410 is 18-pin 0.3" width, 4k x 1, with one ~CE line (the MOS Technology <MCS6550 has 2 ~CS and 2 CS lines and it's 0.4" wide). I can't find any <data on a 4600 but I assume it's similar. Oh, you shouldn't ahve done that... ;) First off I worked for NEC Micro during 79-84 time frame... hawking memories, micros and peripherals (mostly I82xx parts) as a product engineer. uPD410 .4" 22pin three voltage 4Kx1, seperate din and dout, CE and CS/ three voltage pseudostatic. replaces Semi-4200 and 4402, fastest version to 80ns access. (it was a screamer for 1978). uPD411 .4" 22pin three voltage 4Kx1, seperate din and dout, CE and CS/ three voltage dynamic. replaces ti4060, intel 2107, fastest version to 200ns Tce access. same pinout as 410. FYI, altair 88-4MCD boards were so poor I pulled the TMS4060 static and used uPD410s to make them static, one cut to disable refresh. Very reliable after that! uPD 414, .3" 4kx1 dynamic upd 416 .3 16kx1 dynamic, industry standard 2101 .4 22pin static 256x4 (5101 is the cmos part) 2102 .3 16pin static seperate IO 1kx1 2111 .3 18 pin static common io 256x4 2114 .3 18 pin 1kx4 static, common io 2147 .3 18pin 4kx4 static, seperate IO 45ns 2149 .3 18 pin 1kx4 static common io (2114) 45ns 2167 .3 20 pin 16kx1 static, 55ns 4104 .3 18pin 4kx1 pseudo static seperate io CE/ (-5 85ns Tacc, 180ns Tcy) uPD421 .4 22pin 1kx8, same as two 2114s logically, (-5 85ns) 443/6508 .3 16 pin static CMOS 1kx1 444/6514 .3 18 pin static cmos 1kx4 (like 2114 in cmos) 445 .6 24pin static cmos 2kx8 with CE2 and CE1/ industry pintout 1 446 .6 24pin static cmos 2kx8 industry pinout 2 449 .6 24pin static cmos 2kx8 industry pinout 3 4016 .6 24 pin static cmos 2kx8 6116 pinout Most of those were industry standard with part numbering differnces. Be glad I didn't pull down my hard cover NEC catalogs. <If you're asking about the 6550 I'm looking for, yes it is single 5V rail, <but it's 1k x 4 and it's not Motorola. In fact, I'm fairly sure no-one bu <MOS Technology made them. If I knew pinout I could find an industry part that would work save for pinout or package. Allison

26 years, 3 months

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Apple Network Servers

by owad＠applefritter.com

>::If anybody wants more information, see >::<http://www.applefritter.com/prototypes/deepdish/>. > >Quite interesting. It looks like the ANS300 got its 604/200 from an ANS700. >Can I just rip the chip out of another unit and substitute it, or do I still >need the complete 200MHz board? I really couldn't tell you, but I'll forward you message along to Chuck Goolsbee, the owner, who might be able to help. >I'm also particulary impressed with the Spartan page on your site (for those >in the dark, this was a hardware add-on for the Commodore 64 that turned it >into an Apple II): I thought it was just a hardware emulator, but its feature >set was really greater than the sum of its parts. Fascinating! Thanks! Tom Owad ------------------------------Applefritter------------------------------ Apple Prototypes, Clones, & Hacks - The obscure, unusual, & exceptional. ---------------------<http://www.applefritter.com/>---------------------

26 years, 3 months

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