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

by williams.dan＠gmail.com

Whilst we are on the subject of vax media does anyone have disk 4 of June 1997's vax spl. I seem to have misplaced it. Thanks Dan

21 years, 4 months

2
5
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Original IBM 64K Memory Kit in original box on ebay....

by richard.beaudry＠gmail.com

> Date: Thu, 28 Apr 2005 09:45:49 -0400 > From: Ram Meenakshisundaram <RMeenaks at OLF.COM> > > Apparently, Rich has some other original stuff on ebay as well: > Yup ... It's me ... I try not to advertise on the list because: 1) It's a bit self-serving ... People know I'm on eBay, so they can check up on me :-) 2) It's PC-related, and even though *most* agree a 5150 is on-topic, it's still a bit Controversial 3) It's eBay ... around here, that's inviting a flamewar... I actually ended the 64KB listing, as I forgot to note some of the packaging was missing. Maybe no big deal to us, but if looking for a pure original package, it can be significant. Anyway, it is me, and thanks to Witchy for noticing, and Ram for the ad! :-) I'm still around, though my collection is less classic. I did however recently acquire some neat Apple IIgs stuff (TransWarp GS, 2 High-Speed SCSI Cards, 2 4MB AppleSauce RAM cards), but I pray to the gods that I could get the luck of Jules and his Horizons, or Dave and his S100 haul :-) YIKES! Although, truth to tell, they are better archivists than I... So, I still lurk, and may yet have another Sping cleaning :-) Later, Rich B.

21 years, 4 months

1
0
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TRS-80 without floppy drive

by cb＠mythtech.net

My wife has declared that I must remove all my toys from the living room floor. She is tired of it looking like an "electronics graveyard" as she has been calling it for the last week. And it isn't even that bad, I just have two laser disc players with a small stack of discs, two surround sound amps, a VCR, a Video Conference terminal, two NeXT slabs, my PowerBook 1400, a TRS-80, and a Tandy 1000 with monitor and printer... there is still a path to get thru the room, so I don't understand what the problem is. But I know if I don't appease her, she will move onto the garage and/or basement... THEN I'm in trouble! :-) Regarding the TRS-80. It has no floppy drives. I haven't really looked at it yet, but I presume it can be connected to a standard tape recorder to use cassettes (it came with the case pre-markered saying "No floppy drives, use cassettes"... that will be a different project to scrub that off). What is the easiest way for me to obtain software and transfer to cassette? I have no other machines currently setup to read/write to cassette. However, I do have Windows and Mac setups that I can capture an audio stream to cassette if there is some repository of WAV files or similar archives of software. Anyone want to point me in the right direction? -chris <http://www.mythtech.net>

21 years, 4 months

8
11
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Apple Pascal

by h.otten＠chello.nl

Apple Pascal disk images (most versions) can be found on the ftp.apple.asimov.com ftp server. Pascal 1.3 runs fine on the Apple IIGS, withsuppport for 3 1/5 inch disk format. Hans

21 years, 4 months

1
0
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PC/Apple/etc. Cards Worth Keeping/Storing

by dwight.elvey＠amd.com

>From: "Fred Cisin" <cisin at xenosoft.com> > >Check what FDC chip and or/ additional circuitry is used on the floppy >controllers; boards that can handle FM ("Single Density") are handy. > >Any board that has discrete ICs is a lot more fun to hack than one with >VLSI. >If you are new to hardware, look at Bruce Eckel's book on parallel >port interfacing. > Hi When I wanted to add a floppy disk to my NC4000 processor board, I just patched in an old XT floppy controller board. It worked just fine once I realized that the NC4000 could write to it faster than it was ready to respond. Dwight

21 years, 4 months

1
0
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DECmate 1 (VT278) docs?

by waisun.chia＠gmail.com

Quick one: Anybody has the prints for a DECmate 1 (VT278) or the tech manual? All I have is the architectural guide... /wai-sun

21 years, 4 months

2
2
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S100 haul

by dave04a＠dunfield.com

> I wonder if the disk are all hard sectored or if they >are soft sectored. Dave Dunfield has been working on >methods to transfer disk images over serial lines >from the N*. It would be a massive job to filter through >all those disk. Who knows, one might find a jewel for Jules >in the lot :) Hi Dwight, I've recently acquired a box of at least 1000 N* disks, and have been slowly going through them and transferring the material to image files. Most of it is rather boring business software, however I have found original copies of several different versions of various operating systems that I did not have before, as well as some utility and language disks ... It's going to take quite a while, but I'll make any non-personal/confidential material available once I'm done. Hey Jules - if you want to part with one or two of those Horizons, it would make the job far faster to have multiple machines running in parallel... Also, if you are interested in my transfer utilities and a simulator which can boot up and use the images, I have all of the material available on my site. Regards, Dave -- dave04a (at) Dave Dunfield dunfield (dot) Firmware development services & tools: www.dunfield.com com Collector of vintage computing equipment: http://www.parse.com/~ddunfield/museum/index.html

21 years, 4 months

2
1
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Apple Pascal

by spedraja＠ono.com

Hello. Can be possible to obtain in some place image disks of the Apple II Pascal or UCSD Pascal por the Apple II ? I'm searching a copy to play a little in the Apple II Oasis Emulator. Thanks in advance Sergio

21 years, 4 months

2
1
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NorthStar Advantage diagnostic disk wanted

by ajp166＠bellatlantic.net

> >Subject: NorthStar Advantage diagnostic disk wanted > From: "John" <john_a_s2004 at hotmail.com> > Date: Thu, 28 Apr 2005 09:43:03 +0100 > To: <cctech at classiccmp.org> > >Unfortunately GBASIC often crashes with a 'RAM Parity Error' message, I >guess most of the RAM is OK else it wouldn't boot. The Technical Manual >refers to the dealers Diagnostic Diskette, and shows a series of tests to >identify faulty RAM chip. I don't wish to try and re-seat all the chips as >when I tried this on my Pet it has failed to display anything since (another >pending repair project). Ther is an easy way. The NS*dos has a monitor and a memory test. If the memory test isnt there use the monitor. from the monitor Fill ram with a constant of Zeros and display it looking for non zero values. Do it again with ones (FFh) and again display if and look for NON FFh values. It's not exhaustive but I've found all bad ram that way in the past. The alternate is that there isn't that much ram and in mine it's socketed. So shotgunning though not pretty is possible. Allison

21 years, 4 months

1
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Original IBM 64K Memory Kit in original box on ebay....

by RMeenaks＠OLF.COM

Apparently, Rich has some other original stuff on ebay as well: Game Controller in orig box: http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=74946&item=5190497267 &rd=1&ssPageName=WDVW Printer Adapter in orig box: http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=74946&item=5190496497 &rd=1&ssPageName=WDVW So for the purest, its not too bad... Cheers, Ram (c) 2005 OpenLink Financial Copyright in this message and any attachments remains with us. It is confidential and may be legally privileged. If this message is not intended for you it must not be read, copied or used by you or disclosed to anyone else. Please advise the sender immediately if you have received this message in error. Although this message and any attachments are believed to be free of any virus or other defect that might affect any computer system into which it is received and opened, it is the responsibility of the recipient to ensure that it is virus free and no responsibility is accepted by Open Link Financial, Inc. for any loss or damage in any way arising from its use.

21 years, 4 months

1
0
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Stuff I want

by gordon＠gjcp.net

Haven't got a lot of money to drop on classic computer goodness, but I do brew a varied and drinkable selection of beers. OK - here are some things I'm trying to get hold of. Cable to go between two RL02 drives Serial printer, ideally a DECWriter of some sort ('cos it's to go on my PDP11) VAXStation SCSI cable (with the funny half-pitch pins) Some kind of CP/M box, with a reasonably well-documented disk controller and console (can be internal, or an external serial terminal - I'm not bothered). Will swap for beer or toys, can collect. Gordon.

21 years, 4 months

4
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Stuff I want

by spedraja＠ono.com

Well, it appears to be a good moment to place my wish-list. For europeans providers mostly, even when I don't dismiss offers from the other side of the Atlantic ;-) My first field of collection is over old unix-ish systems, in particular Sun, AT&T and DEC systems, but I should like to put a hand in other more "exotic" systems, like Masscomp, Sequent's Pentium and 486 systems, Data General, Tandem... The second is about old CP/M systems. One Morrow, Cromenco, or S100 system (capable of use 8", 5"25 and Hard Disk) would be fine. And one Apple II with CP/M board installed (trying to kill two birds with one shot). Not much, isn't so ? The third is about old IBM PC items, mostly peripherals (One Corvus device, for example) that could be used too with the CP/M systems, but software too. I have already over 100 original software packages, but recentrly I've obtained more space to store this items. In the DEC (more or less) side: * One Decwriter, plus cable set * A couple of RL02 units, plus cable set * A couple of Pertec Units, Cipher or TSV05 type * Two 42" Dec racks * One RX02 unit * One MFM HD-FD controller for Qbus * One Teletype * One serial Paper Tape reader-puncher * One Unibus PDP-11 * One PDP/8-E * One Decmate * One GT-40 terminal * One VT52 terminal * Some VT10x terminals, like 103, 125 and so on. In the AT&T side: * 3B2/400 spares (boards) and software. Docs are welcome but I have a lot already. * One 3B1, operative, with lan capabilities, plus software and docs. * One 3B2 "high" (600, 1000, etc) * One AT&T/NCR StarServer In the Sun side: * One Sun1 system * One Sun2 system * Monitors for Sun3 monochrome systems. Eizo Flexscan 6500 perhaps ? * Keyboard/Mouse for Sun3 * Some kind of "High" Sun3 system(s) FInally, I should like to obtain in some moment of my life one HP-1000 or 2100, and one HP-3000 of the old-style. This one was the first computer where I worked. I had the instruction to mount the disk of work and use the Cobol Compiler. Cheers Sergio

21 years, 4 months

1
0
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S100 haul

by ajp166＠bellatlantic.net

> >Subject: RE: S100 haul > From: "Adrian Graham" <witchy at binarydinosaurs.co.uk> > Date: Wed, 27 Apr 2005 22:13:56 +0100 > To: "'General Discussion: On-Topic and Off-Topic Posts'" <cctalk at classiccmp.org> > >The reason I thought the N* was multiuser is that all the machines I've seen >have had more than 1 RS232 port on the back for terminals.....this makes me >think the Minstrel was 'just' a N* clone from the UK :) If anything they are both generic S100 crates. Most S100 systems needed at least two serial ports. One for the console and often if there was a modem one for that. In my case I used a DEC 100 printer which happens to be a serial interface rather than parallel. Those that did run multiuser often had many more than two ports. I have a few S100 4 port cards and have seen systems easily capable of running 8 or more users. If anything S100 was the PC of the era in the sense that there wer plenty of crate (bus and power) vendors and a plethora of board suppliers. At times mixing and matching was like PCs post XT era in that most boards nearly worked but there were variantion on interpretation on bus standard. The Apple and SS50 bus machines (6800 and 6809) were also common too in the way of machines with some kind of bus that multiple things could be plugged into. In Europe there was ECB bus and I suspect others. So in most cases S100 implies generic system but little beyond that. For example for S100 the cpu list included everything up to and including 386s! By specifiying a vendor of S100 system we are usually talking about box/CPU/FDC as an agragate system from vendor. It was common to have memory from the same of multiple vendors and possibly added IO. A pure single vendor S100 system is sometimes uncommon. It just so happens that NS* marketed the Horizon as complete systems that were business ready and modestly priced as a complete hardware and software package. Allison

21 years, 4 months

5
5
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NorthStar Advantage diagnostic disk wanted

by john_a_s2004＠hotmail.com

Hi, I recently got my NorthStar Advantage up and working, it had suffered when I first powered it on with a failed tantalum capacitor on a SIO board. I didn't originally spot the soot and debris as the machine has two SIO boards and of course the failed cap was on the hidden board :-) Followed advice on earlier thread 'Smoke on the Horizon', I replaced the 6 tantalums with new ones. I also now have a variac and the PSU was bought up gradually, no problems at all on that side. It now boots into either CP/M or NDOS 1.0.0, and on the latter it has GBASIC which is the extended Basic supporting the wonderful graphics ability of this machine. Unfortunately GBASIC often crashes with a 'RAM Parity Error' message, I guess most of the RAM is OK else it wouldn't boot. The Technical Manual refers to the dealers Diagnostic Diskette, and shows a series of tests to identify faulty RAM chip. I don't wish to try and re-seat all the chips as when I tried this on my Pet it has failed to display anything since (another pending repair project). I've just bought some hard sector floppies, so can send a blank floppy to anyone who can copy the diagnostic disk for me, I would be very grateful. Regards, John

21 years, 4 months

1
0
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DSD drive (RX02 replacement) ?

by jwest＠classiccmp.org

I thought someone posted to the list recently wanting a DSD drive (RX01/02 replacement) for their PDP11. Whoever it was, please contact me offlist. Jay

21 years, 4 months

1
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PC/Apple/etc. Cards Worth Keeping/Storing

by marvin＠rain.org

Many thanks to those of you who have commented on this thread! I probably have at least a couple dozen IBM PCs, XTs, ATs, Convertibles, Jrs, PS/2s, RT, etc. along with a fairly complete set of IBM technical documentation for them. I've also got quite a few IBM cards and motherboards, so these are not something I am looking to get rid of. Tony mentioned the IBM professional graphics card and monitor, and that is something I would like to get hooked up just to see how it looks. AFAIK though, I only have one PGA monitor and card. > > Original IBM PC cards are probably worth saving since the PC is > > starting > > to become collectible. > > > > The other reason to keep original IBM PC cards is that the schematics > and tech info are published, so they're easy to modify and/or use for > special purposes, like the disk conversion devices and functions people > are always talking about here. It's pretty easy to make an original IBM > Floppy Controller work with anything that the 765 controller will talk > to. > > I hope I'm not the only person with a fairly complete IBM-published > hardware 'technical reference' set for the PC/XT/AT line.

21 years, 4 months

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Storage, was Re: TRS-80 without floppy drive

by marvin＠rain.org

Ah yes, do you know how to store tighter :)? I've moved out/tossed perhaps 1000 - 2000 cubic feet of stuff, and can kind of see a difference. Another thought we've had here is to sell tickets at maybe $20.00 a pop for people to "tour" certain areas of the house/garage/etc. We figure the biggest market would be to people whose wives complain about the amount of stuff *they* have :). > >Can you clear out the Living Room entirely? > >Move all hobby stuff to one room, either the basement > >or Garage, or the spare room, if you are so lucky to have > >one. > > You assume I haven't already taken over the basement and the garage ;-) > > -chris > <http://www.mythtech.net>

21 years, 4 months

2
1
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[GreenKeys] Up for grabs: (fwd)

by jpl15＠panix.com

FYI: respond directly to the original poster if interested... Cheers John ---------- Forwarded message ---------- Date: Wed, 27 Apr 2005 19:21:51 EDT From: Til128 at aol.com To: greenkeys at mailman.qth.net Subject: [GreenKeys] Up for grabs: Hi gang: I have 3 cases of tractor feed fan-fold paper for postage if anyone is interested. This is the 9 1/2 X 11 NOT 8 1/2...cannot be used in TTY printers... Some with 1/2" greenbar, and some plain. If you are interested please contact me off line. If no one wants it, it will go to the landfill. 73, Tom _______________________________________________ GreenKeys mailing list GreenKeys at mailman.qth.net http://mailman.qth.net/mailman/listinfo/greenkeys

21 years, 4 months

1
0
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S100 Haul

by marvin＠rain.org

> I think we've already got 5 Horizons, so along with those ones and the > three on the way that'll 27 of the buggers. Quite obviously, we are not > going to be holding on to that many! :) > > Shame a few of them have honking great red reset switches mounted in the > front :-( AFAIK, that was a standard mod, at least for anyone doing any development work. I remember working on a clients machine that still had the reset switch in the back ... what a pain!!!

21 years, 4 months

1
0
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6802 disassembler

by marvin＠rain.org

Can someone recommend a freeware 6802 disassembler. The Micro General postal scale that I have (circa 1983) has a 6802 processor with five 27c64 Eproms. I've copied the eprom binarys to disk, and now want to see what the program does. It has lost its calibration (the backup battery died) and upon replacing the battery, it is calling for a calibration and I've not been able to find any informaton on the web regarding how to calibrate the scale. So it looks like time to do it the hard way :). Thanks!

21 years, 4 months

3
2
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TRS-80 without floppy drive

by ajp166＠bellatlantic.net

> >Subject: Re: TRS-80 without floppy drive > From: Fred Cisin <cisin at xenosoft.com> > Date: Wed, 27 Apr 2005 14:56:42 -0700 (PDT) > To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> > >The original TRS-80 cassette interface was often a WORHE (Write Once, Read >Hardly Ever). It was not acceptably reliable. > It was the only casette interface. There was a mod for the Level-II that greatly improved read reliability. Level-1 machine used half the data rate and were decent. Myself I modded one trs-80 I have by removing most of the casette input opamp crap, it worked notably better! Allison

21 years, 4 months

1
0
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S100 haul

by ajp166＠bellatlantic.net

> >Subject: Re: S100 haul > From: "Witchy" <witchy at binarydinosaurs.co.uk> > Date: Wed, 27 Apr 2005 19:20:57 +0100 (BST) > To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> > > >> On Wed, 27 Apr 2005, Jules Richardson wrote: >> >>> We picked up a van load at the weekend - 19 Horizons (another 3 are on >>> the way!), 9 Minstrels, a Cromemco (I forget which!), and an imperial >>> buttload (artistic licence :) of S100 spares. Im impressed! >adrian/witchy >I've got an advert for one in my stash of unscanned mags, but I'm pretty >sure it was a standard (if such a word could be applied) Z80 powered CP/M >box but initially single user instead of multiuser like the Horizon. The NS* horizon is a Z80/4mhz single user S100 system though NS* offered a multiuser OS and basic for it. I know I'm an owner of two. The first I built for myself in 1977! Allison

21 years, 4 months

2
1
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S100 haul

by julesrichardsonuk＠yahoo.co.uk

Just read Dave D's post - seems to be the week for S100 stuff! We picked up a van load at the weekend - 19 Horizons (another 3 are on the way!), 9 Minstrels, a Cromemco (I forget which!), and an imperial buttload (artistic licence :) of S100 spares. Reasonable amount of documentation and floppies too, plus some useful test gear (logic analyser, DRAM / SIMM tester, capacitance meter). This was from a house where the old chap had died recently - to say he was a bit of a hoarder was an understatement. The house was floor to ceiling with computers, docs, software, newspapers, books, photos, videos. Unfortunately the chap's son who was there with us was paranoid about there being sensitive information buried in everything, so 90% of the docs and disks had to be left behind - ditto with most of the components and test gear as he was worried they'd still be on the books >from the guy's old business and he'd be liable if they were released. Shame as it means there's a lot of stuff that's going to get trashed (it wasn't the sort of thing that'd have any resale value). We got a lot of the hardware. I think there were a couple of Minstrels and Televideos left, along with a BBC Micro, Sinclair QL, a pile of mono displays, and a dull Amstrad wordprocessor machine. We've not had time to sort through everything that we picked up yet. I did notice some S100 vector graphics boards that caught my eye... Some quick pics: http://www.patooie.com/temp/northstars_sm.jpg http://www.patooie.com/temp/minstrels_sm.jpg http://www.patooie.com/temp/s100_spares_sm.jpg (lots more spares in boxes out of shot!) All weekend was spent loading and unloading stuff - will try and get an inventory of the boards within a few days... cheers Jules

21 years, 4 months

4
4
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6802 disassembler

by dwight.elvey＠amd.com

>From: "Marvin Johnston" <marvin at rain.org> > > >Can someone recommend a freeware 6802 disassembler. The Micro General >postal scale that I have (circa 1983) has a 6802 processor with five >27c64 Eproms. I've copied the eprom binarys to disk, and now want to see >what the program does. It has lost its calibration (the backup battery >died) and upon replacing the battery, it is calling for a calibration >and I've not been able to find any informaton on the web regarding how >to calibrate the scale. So it looks like time to do it the hard way :). >Thanks! > Hi Marvin I think the 6802 is compatable with the 6800 code. If so, any 6800 disassembler would work. I may have some code to do the disassembly someplace but it is stuff I wrote and isn't too user friendly. If you can't get anything more standard, let me know and I can disassemble it for you. Dwight

21 years, 4 months

1
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S100 haul

by dwight.elvey＠amd.com

>From: "Jules Richardson" <julesrichardsonuk at yahoo.co.uk> ---snip--- > http://www.patooie.com/temp/s100_spares_sm.jpg Hi I wonder if the disk are all hard sectored or if they are soft sectored. Dave Dunfield has been working on methods to transfer disk images over serial lines >from the N*. It would be a massive job to filter through all those disk. Who knows, one might find a jewel for Jules in the lot :) Dwight

21 years, 4 months

1
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Cray picked up today

by williams.dan＠gmail.com

Well I picked up the cray today, I'm not an expert but it looks like it's either got 4 or 5 processors. It also seems to have around 30 4gb hard drives. But there was one main problem it wouldn;t fit through the door in my flat. So I am now slightly poorer and it has a months storage. They guy I spoke to when I picked said it was just switched off, put on a fork lift and moved in to the warehouse. But it seems to have had quite a bit of cosmetic damage, I think it has been dropped or at least knocked over. I will have to wait and see if and permenant damage has been done, It seems to be nuclear proof. The outisde skins are nearly a 2 man lift. We spent 4 hours stripping it down to get on the truck. In the end we might as well of left it and put it on with a fork lift and then took it off the other end. ho hum Dan

21 years, 4 months

8
7
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Apple // - Finally Success!!

by healyzh＠aracnet.com

At this point I'm *seriously* disgusted with DSK2FILE. I transferred "Asimov 2.0" over to my //gs, and I'm able to successfully create the floppies! On a related note, will Wizardry I run on a Apple //gs? Zane -- -- | Zane H. Healy | UNIX Systems Administrator | | healyzh at aracnet.com (primary) | OpenVMS Enthusiast | | | Classic Computer Collector | +----------------------------------+----------------------------+ | Empire of the Petal Throne and Traveller Role Playing, | | PDP-10 Emulation and Zane's Computer Museum. | | http://www.aracnet.com/~healyzh/ |

21 years, 4 months

3
3
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Another Honkin big Haul

by dave04a＠dunfield.com

Hi guys, I just returned from the East coast (New Brunswick Canada) where I met with a gentleman who had a large collection of vintage equipment for me - Brought back one pickup truck worth, and will be returning next month for the rest - 1200km each way - by the time I am finished, I will have travelled nearly 5,000km! Here's what I received in total: S-100 systems: IMSAI 8080 NorthStar Horizon Cromemco Z-2D Cromemco System-3 (Older model with the dual/quad persci drives). Compupro 8086 S-100 system Wynchester Compuduct "Rainbow" (near S-100, has non-standard/tall cards). Multiflex mainboard with 4 S-100 slots & CPU card. Protec PRO-80 - Canadian SBC with one S-100 slot Box with 40-50 S-100 cards - in addition to the systems which are well populated - Found a number of Mits and IMS cards, also a Hayes Micromodem 100 - CPUs, disk controllers, memory etc. - haven't inventoried it all yet non S-100: Altos 586 Dec Rainbow Xerox 820-2 (with spare mainboard). 2x Dy4 Orion-V (STD bus Z80-CP/M system) Ohio Scientific SuperBoard-2 (in enclosure) Acorn Atom Nelma Persona (Canadian CP/M system) BMC IF800 Visual 1050 MAI Basic Four NEC APC NEC N5200/05 Megatel Quark (ultra small Canadian SBC) HAL (early Canadian IBM clone) Osborne-1 (1st edition "tan") Epson PX-8 Also, an ADM-3A terminal (good screen), as well as several boxes of odd's and ends, and boxes and boxes of documentation and software. Even got a nice little addition to my calculator section: A "Sinclair Scientific" complete with hard carry case and manual. Not quite sure where it's all going to go ... I also received a disassembled Grid Compas 1101 which had a battery leak causing irreparable damage to the mainboard - however there are lots of parts, bubble memory modules, complete documentation and original disks - if anyone needs any of these parts, please contact me. Coupled with the material I acquired in January, I figure this should keep me busy scanning and archiving for a good long time - Some of the material I am not very familier with, so I will no doubt be turning to the list for information from time to time... Regards, Dave -- dave04a (at) Dave Dunfield dunfield (dot) Firmware development services & tools: www.dunfield.com com Collector of vintage computing equipment: http://www.parse.com/~ddunfield/museum/index.html

21 years, 4 months

3
2
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Fujitsu M2344 w/ HMD-interface, what's that?

by cheri-post＠web.de

Hi all, got this disk drive recently and figured out that its interface is HSMD, which seems to be a modification of the SMD-Interface. Ok, I know E-SMD, which is faster than SMD, so another modification, but H-SMD ?? I've never seen a controller doing H-SMD. What about the Emulex QD33? It does SMD as well as E-SMD. Can I use that one for this drive? Any hints? Regards, Pierre _______________________________________________________________ Fruhlings-Aktion: Gratis DSL-Modems zur freien Auswahl Nur bis 30. April bei WEB.DE DSL! https://dsl.web.de/?mc=021193

21 years, 4 months

1
0
0 0

TRS-80 without floppy drive

by cb＠mythtech.net

>Can you clear out the Living Room entirely? >Move all hobby stuff to one room, either the basement >or Garage, or the spare room, if you are so lucky to have >one. You assume I haven't already taken over the basement and the garage ;-) -chris <http://www.mythtech.net>

21 years, 4 months

1
0
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PC/Apple/etc. Cards Worth Keeping/Storing

by cb＠mythtech.net

>Maybe a better question; are they any cards worth saving? >I am keeping all the disk controller cards, memory expansion cards, and >any specialized cards. Are they any Apple IIx cards worth saving? My >general rule there has been that if I have the docs, they are worth >saving. I can't tell you what is worth saving, as only you know what your interests are... but if you do end up with any Apple II series cards you decide to dump, I'd be willing to cover shipping to send them to me (plus a few bucks for your time/effort to pack them up). -chris <http://www.mythtech.net>

21 years, 4 months

1
0
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WTB/T: Unibus memory

by pat＠computer-refuge.org

I'm looking for some UNIBUS memory to go with an 11/04 CPU I purchased recently. ATM, I don't care much about the size; enought to be able to run RT-11 would be wonderful. Pat -- Purdue University ITAP/RCAC --- http://www.rcac.purdue.edu/ The Computer Refuge --- http://computer-refuge.org

21 years, 4 months

1
0
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Anyone from the Pittsburgh area ???

by ragooman＠comcast.net

Hello, Anyone from the Pittsburgh area that's also into vintage computer collecting ? I started a newsgroup on Yahoo for Pittsburgh (since there wasn't one yet) where we could swap info. http://groups.yahoo.com/group/pghvintagecomp/ Hope to see you there, Dan -- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ [ My Corner of Cyberspace Pittsburgh Robotics Society ] [ http://ragooman.home.comcast.net/ http://www.pghrobotics.org/ ] [ Got Robot ? ] ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.308 / Virus Database: 266.10.3 - Release Date: 4/25/2005

21 years, 4 months

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Apple // Emulator Disk Images

by healyzh＠aracnet.com

I'm trying to put the write the two emulator images from the following source http://www.iosphere.net/%7eeric/wizardry/weeping_snows.htm to 5.25" floppies. I downloaded them and DSK2FILE.SHK on my G5, copied them to a FAT floppy on my G5, and then read the floppy on my PowerBook 540c, which I then used to write the files out to a 800KB ProDOS floppy. I booted System 6 on my //gs from its SyQuest 44, and copied the floppy to the disk cartridge. Then I unshrunk the DSK2FILE.SHK and used the app to write the two Weeping Snows files to 5.25" floppy. Each one took ~10-15 minutes to write, and now that I'm done, I can't seem to access them. Any idea on how on earth I should get these written to floppy? Zane -- -- | Zane H. Healy | UNIX Systems Administrator | | healyzh at aracnet.com (primary) | OpenVMS Enthusiast | | | Classic Computer Collector | +----------------------------------+----------------------------+ | Empire of the Petal Throne and Traveller Role Playing, | | PDP-10 Emulation and Zane's Computer Museum. | | http://www.aracnet.com/~healyzh/ |

21 years, 4 months

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Anyone from the Pittsburgh area ???

by ragooman＠comcast.net

Hello, Anyone from the Pittsburgh area that's also into vintage computer collecting ? I started a newsgroup on Yahoo for Pittsburgh (since there wasn't one yet) where we could swap info. http://groups.yahoo.com/group/pghvintagecomp/ Hope to see you there, Dan -- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ [ My Corner of Cyberspace Pittsburgh Robotics Society ] [ http://ragooman.home.comcast.net/ http://www.pghrobotics.org/ ] [ Got Robot ? ] ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.308 / Virus Database: 266.10.3 - Release Date: 4/25/2005

21 years, 4 months

1
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Anyone from the Pittsburgh area ???

by ragooman＠comcast.net

Hello, Anyone from the Pittsburgh area that's also into vintage computer collecting ? I started a newsgroup on Yahoo for Pittsburgh (since there wasn't one yet) where we could swap info. http://groups.yahoo.com/group/pghvintagecomp/ Hope to see you there, Dan -- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ [ My Corner of Cyberspace Pittsburgh Robotics Society ] [ http://ragooman.home.comcast.net/ http://www.pghrobotics.org/ ] [ Got Robot ? ] ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.308 / Virus Database: 266.10.3 - Release Date: 4/25/2005

21 years, 4 months

1
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who needs a TS05? (not free)

by vax9000＠gmail.com

In cleveland somebody is selling a TS05 for $100. But $50 will work (I know that). If somebody is interested, I can help to load/ship. vax, 9000

21 years, 4 months

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Stuff in Seattle area

by Saquinn624＠aol.com

The software's been claimed, however the following is still available: Wyse WY-150 terminal Silicon Graphics Indigo2 IMPACT R4k/250 Solid/ [one Solid/Extreme] Indy R5k 150 SC/ XL8 disks went out, but copies of install media can be made. HP 9000/800 H50, >500MB RAM IBM P-200 20" with 13W3 cable Computone ISA multiport serial card SyQuest 44MB SCSI drive several unmentionables (ASUS I---l P-----m boards w/233MHz and RAM, AT factor).

21 years, 4 months

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More TCF proto boards...

by aek＠spies.com

Donzelli may be interested in these. They look similar to the boards in B18xx series machines. The date codes would be about right too (mid 80's)

21 years, 4 months

1
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More TCF proto boards...

by wh.sudbrink＠verizon.net

Interested in identification, will entertain offers if you can use. http://wsudbrink.dyndns.org:8080/images/protobds/ Descriptions: ---------------------------------------------------------- This is an unused socket pin wire wrap board that I think (based on the "B" logo) is a Burroughs. Each of the card edge connectors is 3 inches across. The top edge is rough (hack saw man again) but the board looks pretty complete anyway. P1010001.JPG - Pin side, pins W57, W58 and three pins on row Z1 are broken off (4th, 5th and 6th from the right) P1010003.JPG - Socket side, note the B logo upper left P1010009.JPG - Close up of the B logo ---------------------------------------------------------- ---------------------------------------------------------- This is an unused, unidentified proto board. Each of the card edge connectors is 4 inches across. P1010011.JPG - (Front?) P1010012.JPG - (Back?) ---------------------------------------------------------- ---------------------------------------------------------- I got a bunch of each of these. There are 5 different "styles" of boards in this picture. They are only clad on one side and there are no markings of any kind on the "back" sides. The more narrow boards on the right side of the picture have holes drilled through on the row of pads at the end. The narrow board with the IC pads at the center has holes drilled through on those pads as well. The bigger board on the left only has holes drilled through on the small round pads at its right side. All of the ovals on this board have holes through the foil only. It's hard to see in the picture, but all of the boards are on relatively modern looking green board with the exception of the lower right board. That one is on a dark red/brown board I'm used to seeing in old radios. Someone also hand drilled a couple of holes on the pads at the right end of this board. The narrow boards are 2 1/8 inches wide, the short ones are 4 inches long, the long ones are 6 inches. The big board on the left is 4 x 5 1/4 inches. P1010014.JPG - Foil sides ---------------------------------------------------------- ---------------------------------------------------------- This board (I got three) is solid clad on both sides (Obviously intended to be etched). It is 10 inches long by 4 1/2 inches wide. The "narrowed" end (intended for card edge?) is 4 1/4 inches wide. There are four rows of holes drilled through at that end in a staggered pattern. The short rows have 20 holes, the long rows have 21. P1010015.JPG ---------------------------------------------------------- Bill

21 years, 4 months

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Apple // Emulator Disk Images

by gtulloch＠shaw.ca

Indeed, one would expect that a disk image utility would write the whole formatted image on the disk and be done with it. I had all sorts of problems writing disk images on the target platform that I thought were communications related, which disappeared when I formatted the disks. Interestingly, CP/M images seem to write just fine on DOS formatted disks so go figure. Regards, Gord ----- Original Message ----- From: Vintage Computer Festival <vcf at siconic.com> Date: Monday, April 25, 2005 8:11 pm Subject: Re: Apple // Emulator Disk Images > On Mon, 25 Apr 2005 gordt at gordtulloch.com wrote: > > > I would assume you need to format the floppies with the > appropriate format > > (DOS or ProDOS depending on what you're writing) - I need to do > so on my > > IIGS with DSK2FILE so I presume you'd need to do so on the Mac... > > This is a disk image tool so it doesn't matter what OS you use to > formatthe disk, just as long as the disk is formatted. > > If indeed DSK2FILE requires the disk to be pre-formatted as you > say then > that's probably what was causing the troubles Zane was having. > Lame lame > lame. Some people shouldn't be allowed to write software. > > -- > > Sellam Ismail Vintage > Computer Festival > ------------------------------------------------------------------- > ----------- > International Man of Intrigue and Danger > http://www.vintage.org > [ Old computing resources for business || Buy/Sell/Trade Vintage > Computers ] > [ and academia at www.VintageTech.com || at > http://marketplace.vintage.org ] > > >

21 years, 4 months

3
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Apple // Emulator Disk Images

by dwight.elvey＠amd.com

Hi Formatting of disk is a little bit of black magic to most programmers. There is little information on things like the exact gap sizes used for different formats. Also, formating usually requires knowledge of the hardware actually used while simply writing preformatted sectors can usually be handled through simple system calls. If formatting the disk with the system is trivial, I see no reason to go through the extra process of doing so in the code. While if the program is intended to bootstrap the system with disk of unknown condition, formatting is a must. I've done both ways for my home stuff. Of course, if it is to be released to others, one should include a readme or help printout that states the need of a preformatted disk. Dwight >From: "Gordon Tulloch" <gtulloch at shaw.ca> > >Indeed, one would expect that a disk image utility would write the whole formatted image on the disk and be done with it. > >I had all sorts of problems writing disk images on the target platform that I thought were communications related, which disappeared when I formatted the disks. Interestingly, CP/M images seem to write just fine on DOS formatted disks so go figure. > >Regards, > Gord > >----- Original Message ----- >From: Vintage Computer Festival <vcf at siconic.com> >Date: Monday, April 25, 2005 8:11 pm >Subject: Re: Apple // Emulator Disk Images > >> On Mon, 25 Apr 2005 gordt at gordtulloch.com wrote: >> >> > I would assume you need to format the floppies with the >> appropriate format >> > (DOS or ProDOS depending on what you're writing) - I need to do >> so on my >> > IIGS with DSK2FILE so I presume you'd need to do so on the Mac... >> >> This is a disk image tool so it doesn't matter what OS you use to >> formatthe disk, just as long as the disk is formatted. >> >> If indeed DSK2FILE requires the disk to be pre-formatted as you >> say then >> that's probably what was causing the troubles Zane was having. >> Lame lame >> lame. Some people shouldn't be allowed to write software. >> >> -- >> >> Sellam Ismail Vintage >> Computer Festival >> ------------------------------------------------------------------- >> ----------- >> International Man of Intrigue and Danger >> http://www.vintage.org >> [ Old computing resources for business || Buy/Sell/Trade Vintage >> Computers ] >> [ and academia at www.VintageTech.com || at >> http://marketplace.vintage.org ] >> >> >> > >

21 years, 4 months

2
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Asimov

by Saquinn624＠aol.com

I know that at least 3 people asked for CDs. I only have 2 addresses, though. Could people please re-send so I can get them out? -Scott Quinn

21 years, 4 months

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Apollos and tape drives

by Saquinn624＠aol.com

Building on Jules earlier post- I have been wrestling with my 425, and it seems that Apollos in general are pretty picky about their tape drives. Mine crashes in the load phase, both with distro media and with a custom boot tape from the working disk. I'm not sure what they like, but it doesn't seem to be Archive QIC-150 drives (one >from a Sun, one from a SGI). I've got everything installed, but it was a long process requiring two disks . . . -Scott Quinn

21 years, 4 months

1
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small valves and RE: OT

by ajp166＠bellatlantic.net

> >Subject: Re: small valves and RE: OT > From: ard at p850ug1.demon.co.uk (Tony Duell) > Date: Tue, 26 Apr 2005 00:13:41 +0100 (BST) > To: cctalk at classiccmp.org > >Sure.... The reason I looked up the equivalents is that I don't know US >valve numbers that well, and they don't tell me that much cabout the >valve. The Philips/Mullard numbers are much more useful in that respsect >-- the initial 'D' means a 1.5V filament (E would be 6.3V, etc), the >other letters give the electrode structure (A = diode, F = signal >pentode, K = heptode or octode frequency changer, with the phantom >cathode type of design (H would be a hexode or heptode designed for a >separate oscillator), L = output pentode, etc...) and the '9' tells me >it's a 7 pin miniature base (B7G). I also have a Phillips/Mullard and Eimac manuals. I should have used numbers more common there. I see both here so it's no big deal. For example a homebrew RX for 80/75m uses an eclectic mix, 6AN8 Mix/LO, 6AU6 455khz IF, 6BH6 455khz regenerative detector, 6DS4 BFO, and an ELC84 first audio and power output. All built into a 7x7x2.5" chassis with power transformer and all stages shielded as needed. Works very nice. >Sure. My warning, again, was based on the fact that you're likely to get >inside the set (but as I said, I am sure you realised the dangers anyhow). The dangers are less here with 117V nominal mains. However I've been at this racket for over 35 years. It's usually me telling others to be careful and lockout/tagout. >> The local station for RED SOX baseball is WEEI 850khz! It's the best >> AM radio I have. I have spares for the tubes. > >My comment was not 'why would you want to listen to that radio' (that is >obvious, valve radios are good to listen to), but 'why would you want to >listen to sports when there's plenty of hacking to do' ;-) Simple matter Holmes, background noise. That and I live near Boston! Besides if it's not a Sox game it's likely to be 6 Meter band action if any in the background. Allison

21 years, 4 months

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Crazy Monitor idea for old Home Computers

by healyzh＠aracnet.com

I've been giving some serious thought about breaking out either one of my Apple //'s, C-64's, or maybe even the Amiga 500, as I feel like playing some old games. These days I don't really have the space to set one (or all) up. Then I had an idea on how to save some space. All three of these systems were intended to plug into a monitor that was basically a TV. Has anyone tried to plug an old Home computer into an Analog to Digital TV converter such as the Canopus ADVC-100, and then use a mondern computer with a Firewire port and video capture software as a monitor? Alternatively, would an Apple // work with a Commodore 2002 monitor? Zane

21 years, 4 months

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Need good disk dump utility

by vcf＠siconic.com

I'm currently using Anadisk to dump disks into image files. The problem is, Anadisk, like 22disk, is retarded. If it hits an error it skips the sector but does not put a blank sector in the image file. You have the option of placing a sector header before each sector, but for manipulating disk images, this is a piss poor way to mark missing sectors. Anadisk also has the annoying habit of ignoring the start and finish cylinders and merrily proceeds to read the entire disk, relegating the need to ask you what cylinders you want dumped superfluous. Is there anything in Linux that will dump a disk image and put blank space where bad sectors are? It's not certain if dd does this. I'm sick of the crap programming of others. Must I write *EVERYTHING* myself? -- Sellam Ismail Vintage Computer Festival ------------------------------------------------------------------------------ International Man of Intrigue and Danger http://www.vintage.org [ Old computing resources for business || Buy/Sell/Trade Vintage Computers ] [ and academia at www.VintageTech.com || at http://marketplace.vintage.org ]

21 years, 4 months

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Power always on, or power on/off

by cb＠mythtech.net

In the interest of getting the longest life span out of something, what is the better way of handling power? Should one leave the power on all the time, or should one turn it on and off as needed. This assumes the item in question is going to be used on a regular basis (such as daily). I know there is debate on this topic, so I'm asking it here where people may have the best chance of showing long term patterns to survival rates on either method. My personal finding has been anything that gets regularly power cycled dies sooner then items that are left on all the time. That said, I still turn off anything that will be unused for extended periods of time (not for increasing the life span, but for decreasing my utility bill... ie: I turn off my Playstation when done as that may go weeks between use... but I leave my main computer on 24x7x365, both to increase its life, and to avoid waiting for it to boot.) Alas, my "it lasts longer when left on" data is based off old hardware that has been left on for years at a time. Compared to newer hardware that gets cycled daily. So it could be that leaving something on is better for it, or it could be that modern electronics just suck. So what is the opinion of the group? Leave it on, or shut it off? (and I hope I'm not starting a long flaming thread) -chris <http://www.mythtech.net>

21 years, 4 months

5
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Microfiche scanning

by pete＠dunnington.u-net.com

On Apr 21 2005, 18:28, John Foust wrote: > At 05:14 PM 4/21/2005, Pete Turnbull wrote: > > somthing to hold the fiche against a lens and project a > > magnified image onto the scanner glass. I assume that, in essence, > > is how Al's big fiche scanner works. > > What, no one here has ever tried to bolt a scanner to the > frosted glass face of an ordinary fiche viewer? You'd want to trick > it into not using its own lamp, but that's been done before with > the guy who turned a scanner into a high-res camera. You could just remove the fiche viewer screen. You don't need the screen to form the image, you only need the (virtual) image from the viewer's lens system to be focussed in the same plane as the scanner's optics. Actually, since the image is usually focussed on the back surface of the viewer screen, you'd want to remove it anyway. Similarly, you don't need to remove the scanner's lamp, except perhaps to eliminate stray reflections that would cause glare and reduce contrast. You would just disconnect its power if that were the requirement. -- Pete Peter Turnbull Network Manager University of York

21 years, 4 months

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What's so special about sentinal pro dongle

by kenziem＠sympatico.ca

I am starting to get curious. Out of all my machines the one I get the most requests for is the sentinal pro dongle. Is there a pending patent case? Is the software that required these still in use or demand? this one is labelled 1294/6558 C.B. Microtek ltd ----------------------------------- 4F33BH-B 9451L52135 -- Collector of vintage computers http://www.ncf.ca/~ba600

21 years, 4 months

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Teltek FDC-1

by ajp166＠bellatlantic.net

So happens while moving some boards I found a Teltek FDC-1 S100 card. It's apparently an Z80cpu + FDC(765) + PIO + SIO with some rom and ram. I think it's a precursor to the S100 system on a board save for this is doesn't do the ram. Looking for schematic or manual. Mine may be missing a few chips. Allison

21 years, 4 months

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Book review: Ralph Baer's autobiography

by news＠computercollector.com

As published in yesterday's Computer Collector Newsletter; see the link underneath the "About us" section of my homepage. http://news.computercollector.com ----------------------------------------- Evan Koblentz's personal homepage: http://www.snarc.net *** Tell your friends about the (free!) Computer Collector Newsletter - 700 readers and no spam / Publishes every Monday / Write for us! - Mainframes to videogames, hardware and software, we cover it all - W: http://news.computercollector.com E: news at computercollector.com

21 years, 4 months

1
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Need good disk dump utility

by cpg＠aladdin.de

> From Jules Richardson, 25. April 2005 16:25 > > One thing that'd be useful would be a patched version of dd that could > also retry reading bad blocks n times up to some command-line supplied > maximum; quite often I find for marginal data (such as flakey floppies > and hard disks) an initial read might work but one or more subsequent > reads work find. Far as I know standard dd won't retry reading data at > all. I think sdd does all this. See ftp://ftp.berlios.de/pub/sdd regards, chris

21 years, 4 months

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Asunto: End of Surplus?

by spedraja＠ono.com

Hello. >Supposedly this is coming from the Department of >Homeland Security and has something to do with 9/11. (Have you noticed that >every new, rediculous requirement is in response to 9/11?) One of my hobbies is the history, and the world politics tracking and analisis. There are some patterns repeated from time to time in all the world. This is one of it. The drama itself stays there, and everybody remembers the victims periodically; but the shock is used like a way where the water can flood. And what is the reason to justify the use of this way ? The Security, of course :-) And, please, don't try to say nothing about it or you will be arrested. The Security reason, joined with the thinking of the majority of the people about "I don't wnat problems" works very well. And this gives to the industry something that goes directly to the recycle plant of HP that someone did mention in other message. Sincerely, is the better excuse that I see in my life. And is almost sure that it will work. The good part (for someone), I suppose, is about the progressive growing of the cotization of the old computer equipment "of collection". The economy is incredible. Cheers Sergio

21 years, 4 months

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my Data General Nova 4/X, disk woes continue

by ajp166＠bellatlantic.net

> >Subject: Re: my Data General Nova 4/X, disk woes continue > From: John Lawson <jpl15 at panix.com> > Date: Sun, 24 Apr 2005 20:19:22 -0400 (EDT) > To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> > Cc: "General Discussion: On-Topic Posts Only" <cctech at classiccmp.org> > > > >On Sun, 24 Apr 2005, Tom Jennings wrote: > >> >> After warm-up, it's worse. Signals all through the path look >> OK, hot and cold. I can see no difference, but this is 10 MHz >> NRZ data, in a two-state amp with AGC. I think I'm screwed. >> > > > Um, scrub the heads real good again? Murphy may have been a lot of >things, but subtle wasn't one of them.... > > >Cheers > >John I'd forgotten that little bugger. It thats the case use a different pack for testing afterwards. sometimes the curd on the head damages the pack. Allison

21 years, 4 months

4
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CDC Cyber 170 manual trade?

by abacos_98＠yahoo.com

I was going through all my manuals tonight and found a beautiful condition Hardware Reference Manual for a CDC Cyber 170 dated 1979. I collect DEC so I have no use for it. Not sure how desirable it is but I'll trade for some VAX 6000 stuff. Boards, manuals, software, etc. Or if not, I can send it out to anyone who really needs it for their collection. Thanks, Brian.

21 years, 4 months

2
1
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small valves and RE: OT

by ajp166＠bellatlantic.net

> >Subject: Re: small valves and RE: OT > From: ard at p850ug1.demon.co.uk (Tony Duell) > Date: Sun, 24 Apr 2005 22:02:54 +0100 (BST) > To: cctalk at classiccmp.org >1R5 = DK91 == Pentagrid changer >1U5 = DAF92 == Detector and 1st audio >1T4 = DF91 == IF amplifier >3V5 isn't in the equivalents book, but 3V4 = DL94 == audio output > >And of course the 117Z4 is a rectifier with a 117V filament. I have the RCA small tube handbook. I started as a bag carrying radio tech in the 70s and still fix stuff. I started with tubes and recently built some tube radios for fun. I have a pair of 4CX250s itching for a 1kw input amp for 6M. I haven't succumed yet as I like to do radio stuff at QRP levels for the challenge. >I am sure I don't need to warn you about this, but it's almost certainly >a live chassis set when run off the mains. I bought and keep a isolation transformer for just such repairs when needed back in 1969. However that radio has a phenolic case thats in good shape and is therefor insulated. > >> If it breaks I will. Believe it or not I use it to listen to local station >> for ball games. > >No why on eart hwould oyu want to do that??? The local station for RED SOX baseball is WEEI 850khz! It's the best AM radio I have. I have spares for the tubes. >Oddly we can get Nuts and Volts and more usefully Circuit Cellar in shops >in the UK... IMHO Circuit Cellar has really gone down over the last year >or so, it seems to be just yet-another-microcontroller-circuit now, and >quite often the microcontroller picked doesn't seem to be the most >appropriate device .Oh well... On rare occasions I see Elector, nice mag. I tend to delve into fairly serious stuff like DSP and UHF radio so the ARRL pub QEX is a favorite alone with Trade rags like Electronics Design. Around here there's about 30 linear feet of shelf allocated to linear and RF as well. So I have oddities like Electronics Engineers casebook (ca1960) that has ED article compilations about things like MIT/Lincoln TX2 and non computer stuff as well. Allison

21 years, 4 months

3
2
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Tektronix Terminal manuals

by rigdonj＠cfl.rr.com

I've been using a Textronix Color terminal for several years but never been able to find a manual for it. Last week I found brand new sealed manuals for it. "4205/4207 Color Display Terminals" Operators manual and Opertors Supplement "VT200, 3179G and Tek Enhancements for 4200 Series Computer Display Terminals". Does anyone want to scan them and post them anywhere? The only catch is that >> I DO WANT THEM BACK <<<. And I need them back in a reasonable amount of time. Joe

21 years, 4 months

3
3
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my Data General Nova 4/X, disk woes continue

by tomj＠wps.com

I've been working on my car project (http://wps.com/AMC/1970-AMC-Hornet/index.html) because car season is coming up soon enough, but I peeled time out for the Nova here and there. I originally repaired a popped +5V logic bypass cap on the Read/Write Board, (some monolithic ceramic job), and changed all the funky old caps for new ceramic disks. That worked for 20 - 40 hours of operation without a single error. Disk had formatted with zero media defects. Then the disk started throwing read errors that moved around (bad blocks later good; more and more bad blocks...). Diagnostics never indicated any error other than read errors; seek, format, diags all run 100% perfect except read errors. I suspect the Read/Write Board. So I ordered modern monolithic replacements for the remaining old mono chips from Digikey, and shotgunned all the old electrolytics etc for good measure, in two places electrolytics replaced with tantalums (didn't have .82uF's). Install board with all new chips and alcohol wash, format -- hard 100% read failure! D'OH! Long story short, I found internal +6V was not; turns out I installed a tant backwards. doh. New tant, +6V fine. Formats, reads OK, then errors again! Sheesh! System has been on for two hours (I'm getting paranoid, so temp stabilize the whole thing); halted diags, loaded disk heads, installed drive cover, pushed into the rack, left for an hour for the drive temp to stabilize (this is a religious rite, might as well kill a chicken) then format and test again. After warm-up, it's worse. Signals all through the path look OK, hot and cold. I can see no difference, but this is 10 MHz NRZ data, in a two-state amp with AGC. I think I'm screwed. The R/W board is a piece of work too. I suspect it's an early revision, as the board is a hack job, covered in cut traces, components and jumpers on the bottom, and there's a !#$%!! trimpot crammed in somewhere as well as kludgey RC (lopass) networks in some digital logic. Plus, the PC board was milled out for access to a middle layer. Not Good. Plus, it doesn't match the schematic (though it's close enough to poke around in with a scope). Photos of the nasty board here, http://wps.com/NOVA4/pitchas.html About halfway down. Anyone got a spare board?!

21 years, 4 months

5
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Need good disk dump utility

by dwight.elvey＠amd.com

Hi Sellam I wrote some code to talk to a standard disk controller that runs on a AT. I wrote it because I needed to get the MFM information from disk that had the first track set to FM while the others were MFM. I tried 22disk without success being that my controller doesn't do FM. In my case, the first sector being FM wasn't an issues since I could format on my M20 but I needed to read the other tracks. The code is written in Forth ( sorry about that ). If you'd like to look at it, I can dig it out. It does the standard DMA transfers on an AT. I don't recall but I suspect it has little error checking. Dwight >From: "Vintage Computer Festival" <vcf at siconic.com> > >On 25 Apr 2005, Christian Groessler wrote: > >> > From Jules Richardson, 25. April 2005 16:25 >> > >> > One thing that'd be useful would be a patched version of dd that could >> > also retry reading bad blocks n times up to some command-line supplied >> > maximum; quite often I find for marginal data (such as flakey floppies >> > and hard disks) an initial read might work but one or more subsequent >> > reads work find. Far as I know standard dd won't retry reading data at >> > all. >> >> I think sdd does all this. >> See ftp://ftp.berlios.de/pub/sdd > >Thanks for all the feedback, everyone! > >I checked out sdd and it does not mention anything about errors. >Nonetheless, I'll take everyone's input and get a Linux system running >(something I've been meaning to do anyway). If need be, I'll hack dd to >make it work in a sane manner with errors, and will let everyone know >about it at that time. > >In the meantime I've written a file extractor that handles the sector >headers embedded in the Anadisk images and it seems to work pretty well. >It was just more complicated than it needed to be. > >-- > >Sellam Ismail Vintage Computer Festival >------------------------------------------------------------------------------ >International Man of Intrigue and Danger http://www.vintage.org > >[ Old computing resources for business || Buy/Sell/Trade Vintage Computers ] >[ and academia at www.VintageTech.com || at http://marketplace.vintage.org ] > >

21 years, 4 months

2
1
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looking for IMSAI IM-48 docs

by dwight.elvey＠amd.com

Hi Someone at one of the earlier VCF's had one that controlled stuff in a doll house. Maybe someone can remember who that was?? Dwight >From: "Joe R." <rigdonj at cfl.rr.com> > >Mike Haas has one of these. He may have the manuals too. > > Joe > > >At 02:50 PM 4/24/05 -0400, you wrote: >>Every so often I put this up in various places.. >> >>I'm looking for schematics and otehr useful info on: >> >> IMSAI IMP-48 >> >>Thats a single board computer that IMSAI did using the Intel >>8048 family chips. On board items are keypad and LED display >>to interact with a monitor program in Eprom. Also is 1k of >>user program ram for applications, ofcourse the 8035 romess >>8048 plus IO interfaces that include casette tape, relays >>and TTY. >> >>I've had this one for 25+ years and have not seen any others. >>The one I have is working, it's traced it out and use it >>for occasional 8048 projects. >> >> >>Allison >> >> > >

21 years, 4 months

2
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Crazy Monitor idea for old Home Computers

by korpela＠gmail.com

> To make things even stranger, when I booted up a System 6 floppy, I > got colour once it was running the GUI, BUT, it was a bit distorted > and not the most readable. That's what you'll get with Apple II composite in most of the color graphics modes. In the IIgs they chose compatibility with the II position/color encoding on the composite output over readability. There are a few dozen people on the list that can exaplain Apple II graphics better than I, but to make a long story short, it's a brilliant bit of engineering when you have a limited components budget and limited memory, but compatibility is a bit confining. Run a decent Apple II emulator and you'll probably see the same "distorted" image. If you want better, you'll need to use the RGB output or stick with the monochrome modes. Even if you convert the RGB into composite it might be a win over the built in composite. Eric

21 years, 4 months

2
1
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Seeking HP-2116A manual volume 2

by Tim＠rikers.org

Bob and others: Al has scanned some HP-2116 manuals. I'm seeking the volume 2 manual for the HP-2116A. Al scanned the B manual, but the core stacks are different so other components are different as well. Does anyone have a copy of the HP-2116A volume 2 manual? Please? ;-) Many thanx to Al for the manuals that he put up! http://bitsavers.org/pdf/hp/2116/ I keep putting up more pics as I make progress: http://rikers.org/gallery/hardware -- Tim Riker - http://rikers.org/ - TimR at Debian.org Linux Technologist BZFlag maintainer - http://BZFlag.org/ - for fun!

21 years, 4 months

1
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More stuff in Seattle area

by Saquinn624＠aol.com

I also have: AIX V4.3.3 documentation (about 4 yrs OT, but it *does* run on classic RS/6ks), includes doc CDs and several manuals. SCO XENIX 386 release 2.2AT ("for Compaq Deskpro 386 and compatibles"). Don't have any machines that this will run on, but the disks are readable (checked in a Linux box). Includes docs. Activation key written on first disk. above is FREE, as was the earlier SGIs and HP 9000/H50 [OT alert . . .] I also have a Tek 555 scope that I don't have probes for and is just too big for convienient use. ex-Boeing, one DT and one single trace plugin and service docs. If someone has a smaller scope that they would be interested in trading . . . - Scott Quinn

21 years, 4 months

2
1
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Information on IC 8287 help

by dwight.elvey＠amd.com

Hi Marvin They didn't have the intel part but did have a spec sheet from Siemens on a SAB 8286/87. It seems that yes, the i8287 is the part that will work on the board I've been trying to get work. The current rate is a little lower 32ma instead of 48ma but I doubt that will have any effect on the SYM-1's bus. The 8308 is configured differently on the enables. It has separate receive and transmit enables. I needed the T/R pin with the single Disable pin. This seems to match the i8287 that I just located at Halted :) The Am8303 you sent me matches the schematic I have for the DP8303. The sheet for the SAB 8287 has the same functions as the DP8303. I think my search has endded. It would be great to have a cross reference of these old chips. Dwight >From: "Marvin Johnston" <marvin at rain.org> > >Just out of curiousity, wouldn't you really prefer the PDF datasheet for >the DP8303? It appears to be the same as an AM8308 (AMD) (Octal >Three-State Bidirectional Bus Transceivers) and I am guessing that the >suffix is "J". I couldn't find any info on the i8287 or uPD71087. At any >rate, check your email :). > >> In may searches for a DP8303, I have found nothing. >> I did find with the help of those in this group that >> the 8304 was the same except non-inverted. Looking >> for this part, I found that several places list >> a 8286 as being the same. This is also refered to >> as a uPD71086. While looking at the Jameco catalog, >> I found the next list stated as an inverting buffer >> with the number 8287. I believe this may be the same >> as the 8303 that I've been looking for. >> Can anyone tell me what the pinout is for either >> a i8287 or a uPD71087 ?? >> Thanks >> Dwight >

21 years, 4 months

1
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Enigma Machine To Be Reactivated After 60 Years

by marvin＠rain.org

I just received this and thought the list might be interested ARRLSB - The Official ARRL Santa Barbara Section Mailing List -------------------------------------------------------------------------- SPECIAL EVENT (Enigma Machine To Be Reactivated After 60 Years)...... In September 1939, the radio receivers of all radio amateurs were ordered to be confiscated, but many amateurs volunteered to become "Voluntary Interceptors" (V.I.'s) in their own homes. These V.I.'s intercepted encrypted Enigma messages transmitted in Morse Code which were passed to the code breakers at Bletchley Park. Accuracy was crucial in order to assist decoding of the message, but many of the intercepted signals were weak or fading and atmospheric conditions were often poor with QRM >from loud local stations. Searching through the bands was very painstaking, but it was a task that was carried out with great skill and dedication, providing a most valuable service to the Allies. As a tribute to the work of the V.I.'s sixty years ago, the Scarborough Special Events Group (SSEG) will be on the air as GB2HQ from GCHQ Scarborough over the weekend of May 7-8th. A souvenir QSL card showing an Enigma cipher machine and an HRO receiver will be issued to commemorate the occasion. GCHQ have provided a working Enigma machine for use by the SSEG and Ofcom and have given permission for transmission of an enciphered Enigma message to be sent in Morse Code on the amateur radio bands for this event only. The group will be active on SSB, PSK and CW. The CW station will operate around 7015 or 3515 KHz and the Enigma message will be transmitted in Morse Code at 1100z on Saturday, May 7th, at a speed of 15 wpm. The message will consist of a few five letter groups which will be repeated at 1300 and 1900z. GCHQ invites all licenced amateurs and listeners to submit a copy of this Enigma message and will award a certificate for a 100% accurate intercept. A copy of this message should be sent via club call G0OOO (Scarborough Special Events Group, 9 Green Island, Irton, Scarborough YO12 4RN) and can be enclosed with a QSL card. The cost of the certificate is =C2=A33.00 sterling, 5 Euro's, 5 USD, or 6 IRCs. (UK cheques should be made out to "SSEG"). All profits will be donated to GCHQ Scarborough Charities Fund. Full details will be published on their Web site at: http://www.sseg.co.uk For more information about the Enigma machine, visit the following Web pages: http://www.codesandciphers.org.uk/enigma/ http://www.enigmahistory.org/enigma.html _______________________________________________ ARRL Santa Barbara Section List Mailer

21 years, 4 months

2
1
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DG Eclipse available... (Second try)

by medavidson＠mac.com

On Feb 5, 2005, at 12:20 PM, Tom Uban wrote: > Hello, > > Lyle sent me the pics and I've put them on my site here: > > http://www.ubanproductions.com/MVC-001S.JPG > http://www.ubanproductions.com/MVC-002S.JPG > http://www.ubanproductions.com/MVC-004S.JPG > http://www.ubanproductions.com/MVC-006S.JPG > http://www.ubanproductions.com/MVC-009S.JPG > http://www.ubanproductions.com/MVC-020S.JPG > > Hopefully someone will rescue this machine... > > Disclaimer: Not mine, no connection, etc. > > --tom > > > At 11:30 PM 2/4/2005 -0800, Lyle Bickley wrote: > >> Second try without attached picture. Apparently the 100K JPEG >> picture I >> attached in my original email to the list was "too much" for the list >> server >> to handle. >> >> A very clean dual rack DG Eclipse MV/4000 is available in the SF Bay >> Area. >> [Removed - I've attached a picture] - and have several others with >> more >> detail which I'll be glad to email off-list to anyone interested. >> >> I've inspected the the Eclipse and it looks complete - with all >> cables, keys, >> etc. My guess is that its weight is close to 1000lbs(?). >> >> If you're interested in the critter, let me know and I'll email you >> the >> contact information. >> >> I do not have any relationship to the vendor other than as a >> customer. I just >> don't like to see beasties like this dismantled for parts or sold for >> scrap... >> >> Lyle >> -- >> Lyle Bickley >> Bickley Consulting West Inc. >> http://bickleywest.com >> "Black holes are where God is dividing by zero" >> Just an FYI and an update... I'm in the final arrangements to purchase this machine... all that is left is to arrange the shipping. Fortunately, I'm local to the place that has it, so I'm paying them to deliver it to my house (it's reasonable enough that my renting a truck and moving it myself would cost more). For now, it's probably going in my garage, where I can inspect, clean and test the parts. As each piece is tested, I'll move it into my home office (after I make room) and continue from there. I guess everyone needs a restoration project to occupy their free time? :) I don't know the status of the disks, so I'm not even sure if it has an OS on it... if anyone has any pointers to an Eclipse RDOS or AOS/VS boot tape, I'd love to be put in touch with them! Thanks. Mark Davidson medavidson at mac.com

21 years, 4 months

6
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Information on IC 8287 help

by marvin＠rain.org

OOPS, typos strick ): again. The AM8308 should have been AM8303. > Just out of curiousity, wouldn't you really prefer the PDF datasheet for > the DP8303? It appears to be the same as an AM8308 (AMD) (Octal

21 years, 4 months

1
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small valves

by dwight.elvey＠amd.com

>From: "Allison" <ajp166 at bellatlantic.net> > >> >>Subject: Re: small valves >> From: "Dwight K. Elvey" <dwight.elvey at amd.com> >> Date: Mon, 25 Apr 2005 09:57:08 -0700 (PDT) >> To: cctalk at classiccmp.org >>Hi Stan >> I've done similar. I've taken one of those small 100W >>inverters and rewound the transformer on it to provide >>all the voltages for my older battery powered Atwater >>set. It just runs from a 12 volt gel cell. I tapped >>of the primary to provide the filament voltage and >>used the secondary with tape to provide the rest. >>As I recall, there was one -C and two +B voltages. >>I used no regulation, just used the right rinding >>ratios. One has to remember, these old radios >>were made to run form carbon-zinc cell in most cases. >>I did put a pot on my C cell. The original was -4.5v >>but I found that it works better, with less distortion, >>when set at about -3.5v. >>Dwight > >Good approach. I enjoy building and winding my own cores >be they EI iron or powered iron/ferrite types is part of >that. Switching mode PS design is an art in itself. Part >of the fun is building for good efficientcy and for powering >tube designs that means knowing the load. > >An aside is don't run regens off inverter or switching supplies >as the gain is high enough to negate reasonable shielding >and bypassing. For that I find common alkaline 9V batteries >in series do well for the typical 27-90v range and exhibit >good life. True but expensive. I do this on my Radiola II. Dwight

21 years, 4 months

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Information on IC 8287 help

by marvin＠rain.org

Just out of curiousity, wouldn't you really prefer the PDF datasheet for the DP8303? It appears to be the same as an AM8308 (AMD) (Octal Three-State Bidirectional Bus Transceivers) and I am guessing that the suffix is "J". I couldn't find any info on the i8287 or uPD71087. At any rate, check your email :). > In may searches for a DP8303, I have found nothing. > I did find with the help of those in this group that > the 8304 was the same except non-inverted. Looking > for this part, I found that several places list > a 8286 as being the same. This is also refered to > as a uPD71086. While looking at the Jameco catalog, > I found the next list stated as an inverting buffer > with the number 8287. I believe this may be the same > as the 8303 that I've been looking for. > Can anyone tell me what the pinout is for either > a i8287 or a uPD71087 ?? > Thanks > Dwight

21 years, 4 months

1
0
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my Data General Nova 4/X, disk woes continue

by dwight.elvey＠amd.com

>From: "Tom Jennings" <tomj at wps.com> > >I've been working on my car project >(http://wps.com/AMC/1970-AMC-Hornet/index.html) because car season >is coming up soon enough, but I peeled time out for the Nova here >and there. > >I originally repaired a popped +5V logic bypass cap on the >Read/Write Board, (some monolithic ceramic job), and changed all >the funky old caps for new ceramic disks. That worked for 20 - 40 >hours of operation without a single error. Disk had formatted with >zero media defects. Then the disk started throwing read errors >that moved around (bad blocks later good; more and more bad >blocks...). Diagnostics never indicated any error other than read >errors; seek, format, diags all run 100% perfect except read >errors. > >I suspect the Read/Write Board. So I ordered modern monolithic >replacements for the remaining old mono chips from Digikey, and >shotgunned all the old electrolytics etc for good measure, in two >places electrolytics replaced with tantalums (didn't have >.82uF's). > >Install board with all new chips and alcohol wash, format -- hard >100% read failure! D'OH! Long story short, I found internal +6V >was not; turns out I installed a tant backwards. doh. New tant, >+6V fine. > >Formats, reads OK, then errors again! Sheesh! System has been on >for two hours (I'm getting paranoid, so temp stabilize the whole >thing); halted diags, loaded disk heads, installed drive cover, >pushed into the rack, left for an hour for the drive temp to >stabilize (this is a religious rite, might as well kill a chicken) >then format and test again. > >After warm-up, it's worse. Signals all through the path look >OK, hot and cold. I can see no difference, but this is 10 MHz >NRZ data, in a two-state amp with AGC. I think I'm screwed. > > >The R/W board is a piece of work too. I suspect it's an early >revision, as the board is a hack job, covered in cut traces, >components and jumpers on the bottom, and there's a !#$%!! trimpot >crammed in somewhere as well as kludgey RC (lopass) networks in >some digital logic. Plus, the PC board was milled out for access >to a middle layer. Not Good. Plus, it doesn't match the schematic >(though it's close enough to poke around in with a scope). > >Photos of the nasty board here, > >http://wps.com/NOVA4/pitchas.html > >About halfway down. > > >Anyone got a spare board?! Hi Tom Most of these old circuits used 1-shots to decode things. Take a look at these to see if the timings seem reasonable. Most have pulse widths around 0.7RC. Dwight

21 years, 4 months

1
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Information on IC 8287 help

by ajp166＠bellatlantic.net

> >Subject: Information on IC 8287 help > From: "Dwight K. Elvey" <dwight.elvey at amd.com> > Date: Mon, 25 Apr 2005 09:30:35 -0700 (PDT) > To: cctalk at classiccmp.org > > >Hi > In may searches for a DP8303, I have found nothing. >I did find with the help of those in this group that >the 8304 was the same except non-inverted. Looking >for this part, I found that several places list >a 8286 as being the same. This is also refered to >as a uPD71086. While looking at the Jameco catalog, >I found the next list stated as an inverting buffer >with the number 8287. I believe this may be the same >as the 8303 that I've been looking for. > Can anyone tell me what the pinout is for either >a i8287 or a uPD71087 ?? >Thanks >Dwight the 8286/7 is an intel part. the 8286 is non inverting and the 87 inverts data. They are both octal bidirectional bus transceivers. look it up here as "8286" to get a full PDF datasheet. http://www.datasheetarchive.com/index.html Allison

21 years, 4 months

1
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Need good disk dump utility

by dwight.elvey＠amd.com

>From: "Scott Stevens" <chenmel at earthlink.net> > >On Sat, 23 Apr 2005 16:11:11 -0700 (PDT) >Vintage Computer Festival <vcf at siconic.com> wrote: > >> >> I'm currently using Anadisk to dump disks into image files. The >> problem is, Anadisk, like 22disk, is retarded. If it hits an error it >> skips the sector but does not put a blank sector in the image file. >> You have the option of placing a sector header before each sector, but >> for manipulating disk images, this is a piss poor way to mark missing >> sectors. Anadisk also has the annoying habit of ignoring the start >> and finish cylinders and merrily proceeds to read the entire disk, >> relegating the need to ask you what cylinders you want dumped >> superfluous. >> >> Is there anything in Linux that will dump a disk image and put blank >> space where bad sectors are? It's not certain if dd does this. >> >> I'm sick of the crap programming of others. Must I write *EVERYTHING* >> myself? >> > >Well, the cool thing about the free Unices (and Linux) is that you can >dig into the source code for dd and find out. And if it doesn't put >blank space where errors occur, you can modify it to do so. Perhaps >with a command-line switch option, if one doesn't already exist. > >> I'm sick of the crap programming of others. Must I write *EVERYTHING* >> myself? > >Naw, just the bit that will scratch your particular itch. And if you >make changes to dd and submit your changes back, nobody else will have >to rewrite it either. > Hi Not only should it pad the empty space but it should also write the buffer values that may have been read if it was just a crc error on the data portion. These are often just missing one bit and can be recovered with a little bit of work. Dwight

21 years, 4 months

2
1
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small valves and RE: OT

by ajp166＠bellatlantic.net

>Subject: Re: small valves and RE: OT > From: "Dwight K. Elvey" <dwight.elvey at amd.com> > Date: Mon, 25 Apr 2005 09:38:10 -0700 (PDT) > To: cctalk at classiccmp.org > >>From: "Allison" <ajp166 at bellatlantic.net> >> >>Myself as well. The design of this radio is early 50s. I have a similar >>circuits from the 1960 RCA tube manual that require only A and B(HT) voltages. >>However this radio had a battery based on destructive examination and markings >>that provided 7.5V, 1.5V and 90V. So the likely case is "C" voltage or as >---snip--- > >Hi > The 1.5v cell was most likely for the panel light. >This was common on many of the battery powered sets. >Dwight > Nope, No dial light. I opened the chassis up and traced the 1.5V. It runs the audio output 3v5 other half of the filiment. I suspect they did that to balance the filiment currents. Odd but, thats the story. Allison

21 years, 4 months

1
0
0 0

Theos

by dwight.elvey＠amd.com

>From: "SP" <spedraja at ono.com> >This is the old OS named Oasis. I knew Oasis in 1986, in one version for the >Olivetti M-20. I couldn't take the manual and disks before they go to the >dumpster when my old employeer went down (together with one M-20, one AT&T >3b1, some Amstrad PCW's, some Olivetti M-24 and M-28, and so on... all with >software, licenses, and documentation). > Hi If anyone has Oasis for the M-20, I'd love to get a copy. Infact If anyone has any software for the M20 I would be interested in seeing what you have. Dwight

21 years, 4 months

1
0
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small valves

by dwight.elvey＠amd.com

>From: "Stan Barr" <stanb at dial.pipex.com> > >Hi, > >Tony Duell said: > > >> >> I must try the circuit that was in Elektor a couple of months back to get >> 90V from low-voltage batteries. > >See http://hometown.aol.co.uk/kitradioco/uk.htm for a commercial one, >it even looks like a battery. But IIRC you're like me - you don't like >_buying_ things you can make! > Hi Stan I've done similar. I've taken one of those small 100W inverters and rewound the transformer on it to provide all the voltages for my older battery powered Atwater set. It just runs from a 12 volt gel cell. I tapped of the primary to provide the filament voltage and used the secondary with tape to provide the rest. As I recall, there was one -C and two +B voltages. I used no regulation, just used the right rinding ratios. One has to remember, these old radios were made to run form carbon-zinc cell in most cases. I did put a pot on my C cell. The original was -4.5v but I found that it works better, with less distortion, when set at about -3.5v. Dwight

21 years, 4 months

1
0
0 0

OT Don't read this

by dwight.elvey＠amd.com

>From: "John Honniball" <coredump at gifford.co.uk> ---snip--- > >I've just remembered that Magic Eye valves/tubes have (I think) >an amplifying triode in the same envelope as the indicator. And I >think they're internally linked together. Does anyone have any >data on these gadgets that would show this sort of information? > Hi John If you remember the tube number, you can find some information at: http://www.nostalgiaair.org/Tubes/ They alos have quite a few schematics for old radios. One of the tuning eye tubes that I can think of is the 6U5. Later Dwight

21 years, 4 months

1
0
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small valves and RE: OT

by dwight.elvey＠amd.com

>From: "Allison" <ajp166 at bellatlantic.net> > >Myself as well. The design of this radio is early 50s. I have a similar >circuits from the 1960 RCA tube manual that require only A and B(HT) voltages. >However this radio had a battery based on destructive examination and markings >that provided 7.5V, 1.5V and 90V. So the likely case is "C" voltage or as ---snip--- Hi The 1.5v cell was most likely for the panel light. This was common on many of the battery powered sets. Dwight

21 years, 4 months

1
0
0 0

Information on IC 8287 help

by dwight.elvey＠amd.com

Hi In may searches for a DP8303, I have found nothing. I did find with the help of those in this group that the 8304 was the same except non-inverted. Looking for this part, I found that several places list a 8286 as being the same. This is also refered to as a uPD71086. While looking at the Jameco catalog, I found the next list stated as an inverting buffer with the number 8287. I believe this may be the same as the 8303 that I've been looking for. Can anyone tell me what the pinout is for either a i8287 or a uPD71087 ?? Thanks Dwight

21 years, 4 months

1
0
0 0

Need good disk dump utility

by cpg＠aladdin.de

> > I checked out sdd and it does not mention anything about errors. Hmm, [panther:~]$ sdd -help Usage: sdd [option=value] [-flag] Options: if=name Read input from name instead of stdin of=name Write output to name instead of stdout -inull Do not read input from file (use null char's) -onull Do not write output to any file ibs=#,obs=#,bs=# Set input/outbut buffersize or both to # cbs=# Set conversion buffersize to # ivsize=#,ovsize=# Set input/output volume size to # count=# Transfer at most # input records iseek=#,iskip=# Seek/skip # bytes on input before starting oseek=#,oskip=# Seek/skip # bytes on output before starting seek=#,skip=# Seek/skip # bytes on input/output before starting ivseek=#,ovseek=# Seek # bytes on input/output volumes before starting -notrunc Do not trunctate existing output file -pg Print a dot on each write to indicate progress -noerror Do not stop on error -noerrwrite Do not write blocks not read correctly -noseek Don't seek try=# Set error retrycount to # if -noerror (default 2) -debug Print debugging messages -fill Fill each record with zeros up to obs -swab,-block,-unblock,-lcase,-ucase,-ascii,-ebcdic,-ibm [panther:~]$ The -noerror and try=# parameters should take care about errors. regards, chris

21 years, 4 months

1
0
0 0

heavy metal

by jack.rubin＠ameritech.net

some ideas on managing a collection of vintage equipment - http://www.qsl.net/vk2dym/radio/collection.htm

21 years, 4 months

2
1
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Soviet Punch Cards

by vcf＠siconic.com

No big deal, just thought it was mildly interesting... http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=5189823717 -- Sellam Ismail Vintage Computer Festival ------------------------------------------------------------------------------ International Man of Intrigue and Danger http://www.vintage.org [ Old computing resources for business || Buy/Sell/Trade Vintage Computers ] [ and academia at www.VintageTech.com || at http://marketplace.vintage.org ]

21 years, 4 months

1
0
0 0

Good CD-R media (T-Y CD-Rs)

by Saquinn624＠aol.com

My memory might be a little fuzzy, but I think that there was some talk about how to find good CD-R media a bit ago. I was just looking around (finally got to Fry's) and found some Maxell "CD-RPro" disks that were Tayo-Yuden manufacture. Packaging even said "Made in Japan" Salesman didn't have any idea about Japanese disks, though, and pointed out "other same brand disks" available in larger quantities [Taiwanese, probably CMC] So, they are there, but only in quantity 25 spindles. Perhaps a E-mail campaign to Maxell letting them know that we approve and notice would encourage them to stay with T-Y? - Scott

21 years, 4 months

4
4
0 0

Intergraph fans...

by pmackinlay＠hotmail.com

Just a short post to introduce myself and what I'm up to... I'm currently looking into one of Intergraph's old InterPro systems (a 2830) and trying to dig up enough documentation to allow me to ultimately port NetBSD to the box to replace the native CLIX (an old SYSV 3.2ish Unix). Have made some pretty good progress on disassembling the boot EPROM and writing the beginnings of a hardware simulator. After discovering the CLIPPER CPU book online (not to mention the DP8510 BitBlt unit databook!), I think my off-the-shelf chip documents are almost complete. Information on the custom ASICs is almost nonexistent, but the system diagnostics provide some good reference code which should provide useful information. I'm curious to know if there's anyone else out there that's interested in these relatively rare boxes? For anyone that cares, the basic hardware in the box is: C4M CLIPPER CPU at 70MHz, ECC RAM Zilog 85C30 SCC and 85230 ESCC - one port used by keyboard, other three available Xilinix XC3020 fpga controls Versatec, Centronics or Intergraph compatible plotter interface Intel 82596 ethernet controller NCR53c94 SCSI host controller NEC82077 floppy controller Dallas DS12887 RTC and NVRAM 128k boot UV EPROM 2x128k diagnostic/boot flash EPROM The graphics board is built up with: DP8510 BitBlt unit (x2 on dual head board) custom Bresenham line-drawing ASIC bt459 DAC (x2 on dual head board) 2x1M VRAM (double buffered), (x2 on dual head board) The real key to the missing documentation is the remaining IOGA and SGA custom asics on the system board. Anyone who has any other documentation on this stuff would be a friend for life ;). Regards, Pat Mackinlay.

21 years, 4 months

1
0
0 0

Crazy Transformer question

by healyzh＠aracnet.com

OK, this is a really bizarre question. My Neo-Geo arcade has been acting up, and a couple weekends ago when I tried to take a look at it, I couldn't even get a picture. Today I got the bits to take out the security screws so I could get into the part where the powersupply is. It was just up for 4 1/2 hours without any problems. The only things that have been done is to wipe the grill where the fan is off (it was really filthy), and to move an old sewing machine that was sitting on the floor next to it (unplugged). The sewing machine was sitting next to where the transformer is in the cabinet. Is there any way having it sitting there could have been effecting the power? It's a really stupid and bizarre question, and I don't see how it could effect it, but I can't figure out why the system seems to be working now. Of course a more logical explanation is that there is something loose inside. Zane -- -- | Zane H. Healy | UNIX Systems Administrator | | healyzh at aracnet.com (primary) | OpenVMS Enthusiast | | | Classic Computer Collector | +----------------------------------+----------------------------+ | Empire of the Petal Throne and Traveller Role Playing, | | PDP-10 Emulation and Zane's Computer Museum. | | http://www.aracnet.com/~healyzh/ |

21 years, 4 months

3
3
0 0

my Data General Nova 4/X, disk woes continue

by ajp166＠bellatlantic.net

> >Subject: my Data General Nova 4/X, disk woes continue > From: Tom Jennings <tomj at wps.com> > Date: Sun, 24 Apr 2005 16:55:35 -0700 (PDT) > To: "General Discussion: On-Topic Posts Only" <cctech at classiccmp.org> > >I've been working on my car project >(http://wps.com/AMC/1970-AMC-Hornet/index.html) because car season >is coming up soon enough, but I peeled time out for the Nova here >and there. > >I originally repaired a popped +5V logic bypass cap on the >Read/Write Board, (some monolithic ceramic job), and changed all >the funky old caps for new ceramic disks. That worked for 20 - 40 >hours of operation without a single error. Disk had formatted with >zero media defects. Then the disk started throwing read errors >that moved around (bad blocks later good; more and more bad >blocks...). Diagnostics never indicated any error other than read >errors; seek, format, diags all run 100% perfect except read >errors. > >I suspect the Read/Write Board. So I ordered modern monolithic >replacements for the remaining old mono chips from Digikey, and >shotgunned all the old electrolytics etc for good measure, in two >places electrolytics replaced with tantalums (didn't have >..82uF's). I hope they are not in any timing circuits. Another way to really shoot ones foot is change all logic and any analog stuff or worse digital used as analog. Newer or older parts often will behave different and at 10mhz that was high speed then. There be serpents and devils lurking there. >Formats, reads OK, then errors again! Sheesh! System has been on >for two hours (I'm getting paranoid, so temp stabilize the whole >thing); halted diags, loaded disk heads, installed drive cover, >pushed into the rack, left for an hour for the drive temp to >stabilize (this is a religious rite, might as well kill a chicken) >then format and test again. This tells me you've not looked at the cause only apparent problems that may not be relevent. >After warm-up, it's worse. Signals all through the path look >OK, hot and cold. I can see no difference, but this is 10 MHz >NRZ data, in a two-state amp with AGC. I think I'm screwed. > OK, the drive uses the same CART as a DEC RL01/02 and the base design is a CDC creation if memory serves. DEC nor DG designed the beast. There are two things to pay attention to. Servo amps for the positioner they are analog and can drift. They must be set up at TEMP. If I remember that varient of the drive also had embedded servo information for the head position controls. The second is the read/write electronics have a PLL for read clock recovery. If thats not set up right it will drift outside the lock in range and start tossing errors. It also must be setup at working TEMP. The PLL is to track drive speed errors and irregularities in position and bit shifting. Did you mean "two state amp" or "two stage amp"? Likely it's not an amp problem, a quick look with any old scope could check that as it warms up. >The R/W board is a piece of work too. I suspect it's an early >revision, as the board is a hack job, covered in cut traces, >components and jumpers on the bottom, and there's a !#$%!! trimpot >crammed in somewhere as well as kludgey RC (lopass) networks in >some digital logic. Plus, the PC board was milled out for access >to a middle layer. Not Good. Plus, it doesn't match the schematic >(though it's close enough to poke around in with a scope). Early disk systems like that seem to have their fair share of green, blue or white and red wires. Grean being factory changes, white or blue were often depot repair and red field implemented. I'd not be too concerned if it worked before it should again. Allison

21 years, 4 months

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Intel Multibus proto board (maybe front panel?) available

by wh.sudbrink＠verizon.net

Hi all, The one thing I purchased at the recent TCF flea market was a box full of raw copper clad and proto boards. I was hoping that there was an S-100 proto board in the mix, but alas, there was not. Anyway, among others, that I may offer or ask about later, there was this Multibus proto board. It looks like a front panel implementation. There are six TIL3xx LEDs arranged 4 - 2 and several sets of DIP switches as well as some TTL logic and coax cables maybe intended for probe hook up. There are pictures here: http://wsudbrink.dyndns.org/images/intelmbus/ I just realized that I didn't take any pictures of the back. My camera batteries are recharging, so I'll add some later but here's a quick description... The board is wire-wrapped. It seems in pretty good shape, a few of the pins are slightly bent but none seem to be broken. A few of the wires are broken but it is clear where they were routed to. Looking for trades, especially Ohio Scientific but I'd probably take a couple of S-100 proto boards if nothing else. Unfortunately, the previous owner was a fast hand with a hack saw and I also have the remains of a couple more Multibus proto boards (no components on them) if anyone is interested. Bill

21 years, 4 months

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looking for IMSAI IM-48 docs

by ajp166＠bellatlantic.net

Every so often I put this up in various places.. I'm looking for schematics and otehr useful info on: IMSAI IMP-48 Thats a single board computer that IMSAI did using the Intel 8048 family chips. On board items are keypad and LED display to interact with a monitor program in Eprom. Also is 1k of user program ram for applications, ofcourse the 8035 romess 8048 plus IO interfaces that include casette tape, relays and TTY. I've had this one for 25+ years and have not seen any others. The one I have is working, it's traced it out and use it for occasional 8048 projects. Allison

21 years, 4 months

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I'm going to design and build an X terminal

by msokolov＠ivan.Harhan.ORG

Jules Richardson <julesrichardsonuk at yahoo.co.uk> wrote: > Do you need audio at all? No. Audio does not belong in X and I actually never even suspected that there was an audio extension for X until I heard people on this list complain that Classic X terminals don't have it. Spoiled kids! :-) > > My tentative PowerPC CPU choice is MPC8250. > > Does that need a cooling fan? I think it's a low-power CPU like other PowerPCs I have worked with, but I don't see any problem with putting a little fan in the box. My goal is not to have a fanless box on my desk, but an OSless one, or more precisely without a user-accessible OS that needs system administration. MS

21 years, 4 months

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small valves and RE: OT

by ajp166＠bellatlantic.net

> >Subject: Re: small valves and RE: OT > From: ard at p850ug1.demon.co.uk (Tony Duell) > Date: Sat, 23 Apr 2005 23:45:16 +0100 (BST) >It would be interesting to know what's going on in this set. Can you get >a schematic? Being an American set, it's not in Poole and Molloy :-( It's an RCA 8BX5 lineup is 1R5, 1U5, 1T4, 3V5 and 117Z4 if memory serves. I don't have the schematic for the set. I expent I could find it if needed. Being functional I'm reluctant to tear into it and hand draw the schematic. If it breaks I will. Believe it or not I use it to listen to local station for ball games. >It's one of the better electronics magazines available over here. It has >some interesting projects, and they've now started making microcontroller >source code available for most, but not all, of them. I know the magazine, rarely see it. >The circuit in question was a pretty standard inverter circuit, running >at about 50Hz (not a typo, they wanted to keep RF noise down), feeding a >normal mains transformer used in reverse. Looks like it should work with >no problems. I've done this before. The simple version use saturated switching transistors and tend to have high noise due to high current spikes >from charge storage in the transistors. I usually run them at 100-400HZ with a common mains transformer for better filtering and use a bit of feedback to run the switch transistors such that they are turned off before the core saturates. The end result is less current, better efficientcy and less noise. It's a side effect of my years of working with older commercial VHF/UHF twoway radio that used things like vibrators, Dynamotors and even transistors for generating HT. Often the hybrid and tube radios would be in service for years after expected retirement do to replacement cost. The result was desinging and implmenting replacement circuits that would replace sometimes hard to find hardware, especially those dynamotors. Allison Kb1gmx

21 years, 4 months

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OT Don't read this (was Re: Altair MBL source)

by technobug＠comcast.net

> If things had worked out differently we might be using > ultraminiature electron tubes. Imagine! An entire flipflop in one > package! In the '60s I saw a rocket control computer that was used in a high acceleration missile that was IIRC about 30 cm cubed. It was made up of layers of ceramic approximately 3-5 mm thick each containing around 50-100 "tubes" separated by a thin 2-3 mm layer of ceramic insulation. Each "tube" consisted of an Americium cathode, the necessary grids (perforated plates), and a plate evaporated on the wall of the cavity. Everything was interconnected by metalization on the insulating layer. The necessary resistors/capacitors were placed in cavities between the "tubes". What made this extremely interesting was that all circuitry was differential to exclude the common mode voltages that were generated by the compression of the ceramic block during launch. At that time, solid state devices self-destructed during the acceleration phase. I imagine that any "personal" computer made with that technology would self-destruct any savings one had... CRC

21 years, 4 months

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Microfiche scanning

by benj＠vintagecomputing.com

Hey guys, Last year at a local hamfest I bought some DEC microfiche source code for $5 just as a vintage computer curiosity. Only last week did I pull it out of the closet and realized that it says, "VAX/VMS v2.0 SRC LST MCRF/226" -- and it occurred to me that it might be rare and somebody might want to see it for historical reasons. But I know nearly nothing about VAX stuff. Does that mean that I've got the source to the VAX/VMS 2.0 operating system itself? I do have a hefty little stack of fiche here. How common is this, and is it important that I archive it in some other medium while I have the chance? A few other things it says on the label are "AH-H159B-SE" and "Copyright 1980 Digital Equipment Corporation" and a printed "NR" up in the right corner of the label. Each fiche "slide" is numbered and they go up to about 192. Come to think of it, maybe it's the source for "AH-H159B-SE," whatever that is -- the more I think about how it's written on here, the more likely that seems. Thanks for your help, Benj On Apr 23, 2005, at 11:47 AM, cctech-request at classiccmp.org wrote: > Message: 8 > Date: Fri, 22 Apr 2005 19:36:20 +0100 > From: "Antonio Carlini" <a.carlini at ntlworld.com> > Subject: RE: Microfiche scanning > To: "'General Discussion: On-Topic and Off-Topic Posts'" > <cctalk at classiccmp.org> > Message-ID: <001b01c5476a$2f3ed6c0$5b01a8c0 at flexpc> > Content-Type: text/plain; charset="us-ascii" > >> DEC sold software listings on fiche, but not on paper. A lot of that >> software was either not available in machine readable form, or >> ridiculously expensive. For example, RSTS or VMS listing fiche can >> probably be found, but source kits of either are hard to come by. The >> same only more so is likely to be true for "layered products" >> (compilers etc.) > > The VMS listings switched from fiche to CD when the fiche had > grown to nearly two boxes per release. AFAICT the CD source > listings kit has the same stuff that went into the fiche: the > .LST files. > > There was a source kit, from which you could produce your > own VMS, but I believe that rather than being a $1K/annum > subscription, it was a $200K per release cost. I don't know > when the last one was done, but I do remember someone with > Engineering saying that they'll do another one when someone > actually asks. > > I don't know if all layered product groups used fiche as > an archival medium, but I know that PSI, DECnet-RSX and > ALL-IN-1 did on at least some oocasions. Just as well really, > because I'm willing to bet that most of the archived source > tapes have ended up in the bit-bucker. I remember hearing > (probably via Bob Supnik) that DEC had a big clear out of > the archives that they were paying someone (Iron Mountain?) > to maintain. > > Pity really, as I'd bet that the entirety of the sources > (and build tools etc.) for everything up to and including > the PDP-11 would have fit on a single CD, or at most, a > single DVD. > > Antonio > > -- > > --------------- > > Antonio Carlini arcarlini at iee.org

21 years, 4 months

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phase converters for big iron

by brian＠quarterbyte.com

Hi, Does anyone have any experience using motor-generator phase converters to produce 3 phase power from single phase power for running big iron? (e.g. IBM mainframe equipment). They seem reasonably priced -- about $1 per peak KW, at least on sale: http://www.phaseconverter.com I'd appreciate hearing from anyone who has actual real experience with or knowledge about this. Thanks Brian =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- _| _| _| Brian Knittel _| _| _| Quarterbyte Systems, Inc. _| _| _| Tel: 1-510-559-7930 _| _| _| Fax: 1-510-525-6889 _| _| _| Email: brian at quarterbyte.com _| _| _| http://www.quarterbyte.com

21 years, 4 months

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Old used laptops

by Watzman＠neo.rr.com

Re: "A friend in Mexico called me the other day, looking for a source of inexpensive laptops. He said there's quite a booming market for used laptops down there. Many people would prefer a small laptop over a full desktop for their home system. He thought that even if he had a source of $300-400 200-500 Mhz systems that he could mark them up 30%." I use old 386 and 486 laptops as "terminals" for my classic computers. Sure beats the size and weight of ADM-3 or an H-19, and you can pickup working 386 laptops for $10 on E-Bay (although the shipping will be $15 to $30). Z-Notes and old Toshiba laptops work nice. You can very readily buy laptops higher end than your friend's 200 to 500MHz for his price range. You can get many Toshiba 2805's (650MHz to 1GHz Pentium III's) for $250 to about $400. Those have DVD drives, USB ports, XGA active matrix screens (13" to 15") and are very serviceable machines, and very well built. Lots of older Thinkpads with Pentium II's and III's are in that same price range or less. Last weekend at a Hamfest I picked up a Toshiba 490CDT for $10. It was missing a power adapter and had a dead LCD inverter, but is otherwise fine. I picked up the power supply for $10 (same hamfest) and the inverter for $4.99 (on E-Bay, but shipping was $10). The machine is a Pentium II with 64 megs of RAM and a 4 gig drive, well worth what I will have invested in it.

21 years, 4 months

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LCD monitors

by Watzman＠neo.rr.com

LCD Monitors have gotten cheap. I'm regularly seeing 17" 1280x1024 monitors for $149 to $169 and 19" 1280x1024 for $249 to $279. Most of these are off-brand, but sometimes they are name-brand (Planar, Sceptre, Acer, even occasionally Samsung). The best sources are Tiger Direct (www.tigerdirect.com) and www.ecost.com. Both have relatively large quantities of "inexpensive" monitors (17" under $199 and 19" under $299). I've bought quite a few of them, and they have been ok. None have had more than 3 bad pixels (none have been "perfect", either). They are not "great" monitors, but they are not junk either, they are perfectly useable. My biggest complaint is that they don't have DVI inputs, but you can find monitors in the "cheap" price range (under $199 and 19" under $299) that do. My second biggest complaint is short or poor quality cables, which causes "ghosting" and "ringing" in the image. Cable quality is VERY important. You can almost judge this by the thickness of the cable. You want a cable that's like a garden hose, not like a (thin) soda straw. If you are going to use an analog LCD monitor, you are doing yourself a disservice if you don't get the test pattern generator available at: http://www.winsite.com/bin/Info?500000030936 And use it to properly set the dot clock. After installation, select the leftmost of the 3 functions in the "Test" group and then check both check-boxes. This is a very old Windows 3.1 program written in visual basic. It runs under XP just fine. You need VBRUN300.DLL (the Visual basic version 3 runtime DLL library), which it may or may not come with it depending on where you download it from. This program is non-invasive, it's "installation" makes no changes to your registry or to any system components or files. In fact, if you just unzip the program and double click the exe file, it will run fine without actual "installation" (the program and the help file need to be in the same directory, and VBRUN300.DLL needs to be available). When you display this pattern, you should see an absolutely perfect and uniform field of alternating (but very, very fine) black and white vertical bars each only one single pixel wide. If you see "moir?" distortion, or smearing, your display isn't adjusted correctly. Digital monitors (with DVI interfaces) will always be "perfect". Analog monitors will usually show an initial moir? distortion pattern until they are adjusted (dot clock frequency and phase). In most cases, perfect adjustment can be achieved (and is "remembered" by the display), but in some cases you can't achieve this. Note that the "auto" (auto-adjust) function on almost all analog LCD monitors gets "close" but usually does not get to the best possible adjustment. The average life of the CCFT lamps used in monitors is about 25,000 hours. They can be replaced with varying degrees of difficulty (ranging from trivial to impossible). Newark Electronics carries a good selection of generic lamps (you need to know the diameter and length in mm). However, the usual failure mode is the inverter, not the lamp, and getting an exact replacement inverter is often difficult or impossible. The problem isn't cost ($30 to $80), it's pure availability, as many of these are custom parts only available from the manufacturer. It may be cheaper to buy a new monitor and sell the old one for parts on E-Bay (the LCD panel, which may still be good, may be worth more as a part than the cost of a new monitor).

21 years, 4 months

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Free Book: Encyclopedia of Computer Science and Engineering

by chenmel＠earthlink.net

To the first person who wants it and will pay shipping, I have a copy of: Encyclopedia of Computer Science and Engineering, Second Edition. Edited by Ralston and Reilly. Van Nostrand Reinhold, 1983. This is a huge book, about the size of an oversized College Dictionary, a bit smaller than an unabridged dictionary. 1650 pages hardbound. Shipping weight looks like about 7 pounds (about that much overscale on my 5 pound scale). It should be of interest to people who participate on this list, because it dates from the Minicomputer/Mainframe era and hast lots of references to classic-era computing. It won't probably be expensive to ship media rate within the US. To calculate aprox. shipping you can use zipcode 46227. First person to respond gets first chance at it. -Scott

21 years, 4 months

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Theos

by James＠jdfogg.com

Anybody ever hear of an OS called Theos that ran on the original IBM PC? Said to be *nix/CPM-ish but is neither? A friend has an old 5150 with this installed on the HD. He wants to copy it off and preserve it.

21 years, 4 months

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phase converters for big iron

by n8uhn＠yahoo.com

Rotary phase converters or "phase masters" as they are sometimes refered to as, are widely used in the broadcast market. if the transmitter site can only be wired for 1 phase 220 because three phase does not run in the area (usually very remote) then a rotary or inverter phase converter is used. these can supply power in the three digit Kva's. i would avoid the inverter type as they are more pricey and suck alot of juice. goto www.broadcast.net and find the listserves. >from there join "radio tech" and "broadcast" and ask your question about phase converters there. a couble weeks ago, a station was selling one they no longer needed, don't remember the price but have seen them go for prices in the hundred's to the thousdands. Date: Sat, 23 Apr 2005 17:41:12 -0400 (EDT) From: William Donzelli <aw288 at osfn.org> Subject: Re: phase converters for big iron To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> Message-ID: <Pine.SUN.4.20.0504231740020.16085-100000 at osfn.org> Content-Type: TEXT/PLAIN; charset=US-ASCII > I'd appreciate hearing from anyone who has actual > real experience with or knowledge about this. Whatever size of converter you figure you need, even with safety factor, slop, and such...get the next size up. William Donzelli aw288 at osfn.org __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com

21 years, 4 months

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Fwd: Free to a good home (vax4000/300 in Pittsburg, PA)

by vax9000＠gmail.com

---------- Forwarded message ---------- From: Lord Isildur <mrfusion at vaxpower.org> Date: Apr 22, 2005 1:58 PM Subject: Free to a good home To: port-vax at netbsd.org I have a VAX 4000/300 that needs a new home. It has no memory, and I'm under pressure to either get it up and running or get it out of the machine room. Having not found reasonably priced memory anywhere in the last year, I think finally it has to go. alas! anyway, the machine is free for pickup in Pittsburgh, PA, on the CMU campus. Anyone want it? Isildur

21 years, 4 months

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Apple // Questions

by cb＠mythtech.net

>I'd not realized it was the same footprint. In that case, this probably is >the best way for me to go. Plus I think I can easily get to at least one of >my //gs's. The doc's, and the box of stuff for it will no doubt be more >interesting... It isn't *exactly* the same footprint. The IIgs takes up the same amount of space for the computer as the IIc does. However, with the IIc you get the floppy drive and keyboard in that same space. The IIgs has external floppy and keyboard. Personally, I prefer the external keyboard anyway, as it gives more flexability to where the computer itself goes. -chris <http://www.mythtech.net>

21 years, 4 months

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