Wang 2243 drive enclosure

Are there any Wang people on this list? I came across a Wang 2243, which is an enclosure w/ 3 8-inch floppy drives in it for $75 in the local surplus shop. Is there a demand for something like this whole or is the value in the drives? I've been wanting to mess around with some 8-inch

Re: Looking for 8085a CPU

If you were on this side of the pond it would be easy. The 8085A is a really common part with many vendors and all work. Also if a different one gets hot (they nominally run warm not hot to the touch) check to see if there is a bus or address driver shorted or stuck in the wrong direction. Make

Re: Supercomputers, fishing for information

On 11/07/2016 07:59 PM, Mark Linimon wrote: On Mon, Nov 07, 2016 at 11:23:58AM -0800, Chuck Guzis wrote: But if you're a suburban resident living on Mulberry Street, anything but single-phase is pretty much out of the question. Oh, you can get it -- but be prepared for a large hassle. A

Re: Looking for 8085a CPU

On 11/07/2016 03:32 PM, Adrian Graham wrote: > Hi folks, > > Still working on this STC Executel and it looks like the CPU isn't > too good given how hot it gets within a minute or so. The display is > the same whether there's a CPU physically present or not. I built > this circuit to test it: >

Re: Supercomputers, fishing for information

On Mon, Nov 07, 2016 at 11:23:58AM -0800, Chuck Guzis wrote: > But if you're a suburban resident living on Mulberry Street, anything > but single-phase is pretty much out of the question. Oh, you can get it -- but be prepared for a large hassle. A former neighbor had a 440V 3-phase Italian lathe

Re: Supercomputers, fishing for information

On 11/07/2016 01:04 PM, et...@757.org wrote: Hmmm it shouldn't be that hard in this day and age to come up with that kind of current assuming switchers would be clean enough. I have a home use LED video screen I assembled/am finishing from Chinese modules that runs on 480 amps @ 5vdc,

Re: PDP 11/20 sold (ebay warning)

the old clothes makes it sound like a prop buyer for movies... on the other hand they'd probably buy a dead one for less... On Mon, Nov 7, 2016 at 6:54 PM, jim stephens wrote: > Looks like someone put in a high enough bid to hold onto the 11/20 that > went today. I guessed

Re: PDP 11/20 sold (ebay warning)

On Mon, Nov 07, 2016 at 08:04:09PM -0500, couryho...@aol.com wrote: > now I know what ours is worth! Clearly not. But I'll be happy to take it off your hands for a hundred bucks or so. Contact me privately. (oh it's a JOKE folks :-) ) mcl

Re: PDP 11/20 sold (ebay warning)

now I know what ours is worth! $ed In a message dated 11/7/2016 5:55:19 P.M. US Mountain Standard Time, jwsm...@jwsss.com writes: Looks like someone put in a high enough bid to hold onto the 11/20 that went today. I guessed an amount around what it went for would be what I'd pay, so

PDP 11/20 sold (ebay warning)

Looks like someone put in a high enough bid to hold onto the 11/20 that went today. I guessed an amount around what it went for would be what I'd pay, so don't know if I'd have gotten it or not, but didn't try since that was around the 3500 dollar level. (it sold for $2961). The fun thing

Looking for 8085a CPU

Hi folks, Still working on this STC Executel and it looks like the CPU isn't too good given how hot it gets within a minute or so. The display is the same whether there's a CPU physically present or not. I built this circuit to test it: http://saundby.com/electronics/8085/freerun.shtml Using a

PDP8a CPU fixed! (was Re: DEC DELQA - seems not to work. Anyone got a spare?)

On Mon, Nov 7, 2016 at 11:44 AM, Ian S. King wrote: > I love reading stories of component-level repair. > Assuming my notes and sketchy memory make any sense: One of my PDP 8a CPU boards (the M8315) passed all the self tests I could toggle in, EXCEPT, it would ignore HLT

Various Software and Documentation for shipping + donations (round 2, much delayed)

All, Sometimes my wheels turn slowly. Work, life, etc. intervened since last Sept. but I’m back to this task for a while. I'm trying to help Cindy find homes for some of what's left from her warehouse. I can hold them only temporarily ( :-) ), but if any of this interests you

Looking for terminals again - oops

Whoops, looks like I sent this to the wrong cct*** email, apologies! My interest in video terminals has been awoken again, and I am again searching for one. I like the look/size of the VT220s, very nice and compact! Anybody have extra DEC or IBM terminals in Toronto (Canada) ? I’m probably

Re: Supercomputers, fishing for information

On 11/07/2016 11:04 AM, et...@757.org wrote: > Hmmm it shouldn't be that hard in this day and age to come up with > that kind of current assuming switchers would be clean enough. I have > a home use LED video screen I assembled/am finishing from Chinese > modules that runs on 480 amps @ 5vdc,

Re: TEAC-55Fxxx

On 11/07/2016 06:24 AM, emanuel stiebler wrote: > Anybody has a spare to sell, give away, trade? I've got a couple of 55Fs (with head-load solenoids) that I'm not using, but I suspect that you're on the wrong side of the pond. I think I may also have a few 96tpi Japanese drives as well, if

Re: Supercomputers, fishing for information

I wonder if LCM has ever measured the power draw of each of their big machines? Do they run them on any sort of commercial PDU system? I'd hope so, not too expensive and they should be able to see real time at least the current draw. -- Ethan O'Toole

Re: Supercomputers, fishing for information

Yes, that's how the 360's (at least mid-range) were set up. You could tell, the converter-inverter was INSANELY loud, at a massively piercing audio frequency. The key was that this one unit gave regulated AC power to all Wild! We tried to get a 370/145 running at a guy's house. That had

Re: Sage II

On Mon, Nov 7, 2016 at 2:22 PM, emanuel stiebler wrote: > Thanks! > It looks like you are right, playing a little with the RAM banks, > finally got me errors, so at least one chip is dead. > Will take few days, until my replacements arrive, but now I > have 384k of RAM ;-) > >

Re: Supercomputers, fishing for information

I wonder if LCM has ever measured the power draw of each of their big machines? On 11/7/16 10:25 AM, Jon Elson wrote: > We tried to get a 370/145 running at a guy's house. That had the 17 KVA > motor generator set in the back (WAY more than > a 145 needed, but they apparently used one MG set

Re: Supercomputers, fishing for information

On 11/07/2016 10:59 AM, et...@757.org wrote: All 370's ran off 415 Hz 3-phase power. The mid-sized ones had the motor-generator set built into the back of the machine. The 415 Hz (regulated) power was transformed to low voltage and run through an inductor-input filter and then series pass

Looking for terminals again

The interest in video terminals has been awoken again, and I am again searching for one. I like the look/size of the VT220s, very nice and compact! Anybody have extra DEC or IBM terminals in Toronto (Canada) ? I’m probably somewhat interested! -brian

Re: Mac SE NVRAM battery removal

There's nothing stored in the Parameter RAM that won't be restored to a default state by the OS on boot. Macs generally won't boot without a PRAM battery though, so if you're storing your systems without one, you'll need to replace the battery before use. You might want to run some wire for a

Re: Supercomputers, fishing for information

Yup, all dumpstered by the company formerly known as Rackable What survives is in the hands of collectors. They worked hard to save what was still left at the end. SGI was just as brutal to Cray. Scorched earth to their archives a decade before. Ugh. To be fair, I even know CEOs today of

Re: Supercomputers, fishing for information

All 370's ran off 415 Hz 3-phase power. The mid-sized ones had the motor-generator set built into the back of the machine. The 415 Hz (regulated) power was transformed to low voltage and run through an inductor-input filter and then series pass regulated. They had a circuit they called an

Re: Supercomputers, fishing for information

On 11/7/16 8:46 AM, et...@757.org wrote: > I think one of the guys might of > mentioned you! But he talked as if much of that documentation was gone. > Yup, all dumpstered by the company formerly known as Rackable What survives is in the hands of collectors. They worked hard to save what was

Re: Supercomputers, fishing for information

Supercomputer collectors are like the mainframe collectors, they like to keep a low profile other than the Cray-Cyber folks in Munich. Those guys are cool, and I appreciate them putting notes online. My Crays had their hard disks removed and destroyed (came from high side / govt contractor /

Re: DEC DELQA - seems not to work. Anyone got a spare? [SOLVED]

On Sun, Nov 6, 2016 at 6:13 PM, Joseph Zatarski wrote: > >On 2014-10-26 3:07 PM, Toby Thain wrote: > >>* On 21/10/14 7:38 AM, Noel Chiappa wrote: > *>>>* > From: Toby Thain > *>>* > Looking to see what the internal self-test returns as an > error > *>>>* code

Re: TEAC-55Fxxx

On Mon, Nov 7, 2016 at 9:24 AM, emanuel stiebler wrote: > Anybody has a spare to sell, give away, trade? > > Thanks > You might be able to get away with more than just TEAC for the Sage II. Here is a pic of a system with a replaced drive

Re: Analogue monitor board repair

Hi folks, Replying to myself here since I've had a bit of a breakthrough but not in the way I'd have liked. A fellow collector who also got one of these machines at the same time opened his up and there was an extra little bridgeboard piggybacked off some resistors next to the teletext display

TEAC-55Fxxx

Anybody has a spare to sell, give away, trade? Thanks

Re: [ex-convex] Re: Fwd: Audio interview that mentions my Convex

A very interesting story. Now we do need detailed information, schematics, maintenance procedures and software for C1,C2,C38 as well for SPP systems. My SPP1600XA, which I used e.g. to heat my cellar stopped operation due to breaking the voltage limit using psu_util. @Camiel: would you like

Re: Sage II

On 2016-11-05 14:25, tony duell wrote: I have one question: How does it check, how much RAM is in it? Boot shows 128K, but the board has 512K Incidentally there is a .zip file on Bitsavers called SageSources. Unpack it, and in Sources1 look at PROM2.TXT. That is part of the 68000 source for

Re: KIM-1 Debugging tool

I still need to post the final schematic. A new thread might be a good idea. I wanted to keep the board as simple as possible so one could just wire wrap or point to point it. It only has a 7474, 7402 and a 7404 as well as the EPROM. It could easily be done with a GAL or PAL and the EPROM. I

Re: MACRO11

On 2016-11-07 8:34 AM, Holm Tiffe wrote: Jörg Hoppe wrote: Hi, my version of the MACRO11 cross-assembler for PDP-11 is now on https://github.com/j-hoppe/MACRO11 . Among others it fixes the "JMP Rn is illegal" error on "jmp (rx)" opcode. Also I added the option "listhex" to produce a binary

Re: MACRO11

Jörg Hoppe wrote: > Hi, > > my version of the MACRO11 cross-assembler for PDP-11 is now on > https://github.com/j-hoppe/MACRO11 . > > Among others it fixes the "JMP Rn is illegal" error on "jmp (rx)" opcode. > > Also I added the option "listhex" to produce a binary listing in hex > notation

Re: looking for S100 EPROM programmer board.

Thanks for your opinion on this board. I've used it for maybe 25 years and its does all the 5V Eproms. Its currently configured for 27256. It does not do any of the three voltage eproms. Now a manual would be helpful, your comments are things I already know. I don't care to unwrap a S100 board