Re: What kind of keyboard is this?

On 07/09/2015 03:16, "Win Heagy" wrote: > I picked this up at Radio Shack about 25-30 years ago and have been > hauling it around ever since. > > http://imgur.com/oNEcRFv,VacFqrY#0 > (There should be two images...a link to the second.) > > It was a surplus thing that RS was

DEC Alpha 3000 Model 600

I thought it might be nice to have a DEC based graphics work station. I had the Alpha, a high res monitor and the Hobbyist Media CD for ALPHAVMS 8,3. (yes the system supports 8.3) SFSG .. So CD in the drive and switch on. First a nice colour graphics demo/test. Then the nomal system level

Re: Problem with RF73 DSSI disk

Dave Woyciesjes wrote: > How about all of you shut the hell up, drop this, and talk > computers, okay? > > >>.. > >>Now, after that many text about "Role of Meaning" is it just me that > >>thinks that the time where better to be used for clearing technical > >>problems? > >> > >>Regards, >

DEC 8235 IC? (repost)

As something went wrong in posting this question, I try to repost it here. please don't be offended by this. - Hi all. is there a list of equivalents for DEC ic's? I've made a mistake in attaching our BA-8 to the PDP8/f

Re: DEC Alpha 3000 Model 600

Rod Smallwood wrote: I thought it might be nice to have a DEC based graphics work station. I had the Alpha, a high res monitor and the Hobbyist Media CD for ALPHAVMS 8,3. (yes the system supports 8.3) SFSG .. So CD in the drive and switch on. First a nice colour graphics demo/test. Then the

Re: 'New' PDP-11 prints

> There are a number of things like that (e.g. the H786 power supply for > the BA11-N; [print sets] not available separately [online], but in the > 11/23 FMPS [online], if you know to look there): we ought to produce > some sort of registry, to collect such information in one

Re: DEC Alpha 3000 Model 600

Hello Peter Looks like I trod the same path as you. I cleaned the CD with a microfibre cloth. No Joy. I tried every scsi CD drive I have. After setting the jumpers of course. Theres a couple more in the store I'll clean them up and give them a try. The wife and I (retired) are off for a

Re: DEC Alpha 3000 Model 600

Its got a PMAGB-B fitted in Turbochannel slot1 as per the 3000 600 user guide page 2-12 fig 2-8 Regards Rod On 07/09/2015 14:48, Mark Wickens wrote: I was quite surprised about 8.3 supporting the DEC 3000/600 AXP, however looking at the Quickspecs you appear to be right.

Re: DEC Alpha 3000 Model 600

I have a 3000/400 and I was never able to get 8.3 to install on it ... I don't think I was ever able to get it to even boot from the 8.3 media (with most recent firmware) ... I just dropped back to V7.3 and it works great. Best, Sean On Mon, Sep 7, 2015 at 9:48 AM, Mark Wickens

Re: 21MX proms (per request)

On 09/06/2015 2:00 PM, Alexandre Souza wrote: Jay, no one is pin compatible, I always make adapters. But at least I make it work :D 2015-09-06 16:00 GMT-03:00 Jay West : Alexander wrote... - Intersting to note: many times i have used eproms in place of these proms.

Re: 21MX proms (per request)

As I said in the original post I wrote, sometimes you gotta use flash devices that are WAY faster than common EPROMs... 2015-09-07 12:32 GMT-03:00 John Robertson : > On 09/06/2015 2:00 PM, Alexandre Souza wrote: > >> Jay, no one is pin compatible, I always make adapters. But

Re: Control Data ad: Omega 480 "370 compatible alternative" on eBay

On 9/6/15 7:54 PM, Mark Linimon wrote: Does anyone have any idea if this was a real product there are a couple of manuals for it on bitsavers

Re: Interlisp-D (Medley) "display font" disks for the 1186?

On 9/6/15 2:18 PM, Josh Dersch wrote: Lots of other disks to look through but it's a pain to get them written out; one of those HxC floppy drive emulators is looking rather nice right now :). you might want to see if http://bitsavers.org/bits/Xerox/8010/extractXeroxFloppy.zip can be

Re: 'New' PDP-11 prints

On 9/7/15 5:53 AM, Noel Chiappa wrote: So I have started such a registry. Alan Frisbie has been scanning tons of stuff this past year. I expect that many missing schematics will surface when that is made available.

Re: DEC Alpha 3000 Model 600

I was quite surprised about 8.3 supporting the DEC 3000/600 AXP, however looking at the Quickspecs you appear to be right. http://www8.hp.com/h20195/v2/GetPDF.aspx%2Fc04154442.pdf However, I don't see any Turbochannel graphics adapters listed as supported, only the following: Graphics

RE: 21MX proms (per request)

Sean wrote - But I do think there's merit in Alexandre's general argument that one could theoretically emulate the older bipolar PROMs with some mix of modern components ... and the programmable device would be (a) more easily obtainable than the old bipolar PROMs and (b) programmable

RE: 21MX proms (per request)

If I were doing it. First you need to find out if it needs OC output. There are many flash parts in surface mount that can have the higher speeds. Add some 74LVC245 to give bus drive needed, also surface mount. All on a little PC board. There would be a lot of wasted space in the flash but what

BBC Model B with Raspberry Pi Internals

Bit of a tricky one to google this, so thought I'd consult the list - does anyone know of a documented project that replaced the internals of a BBC Model B with a Raspberry Pi (or MiniITX PC) interfacing with keyboard etc. to bring modern internals with a traditional interface? I don't even

Re: A poltergeist in my machine?

On 09/07/2015 05:09 PM, Noel Chiappa wrote: And when I put my 'scope lead on the second input... the memory suddenly starts working! Well, I could see that - the added resistance or capacitance or whatever of the probe might have had some effect on a circuit that was right on the edge. But

Re: A poltergeist in my machine?

On 2015-09-08 00:09, Noel Chiappa wrote: So I've mentioned how I've seen this wierd behaviour where QBUS memory boards that hadn't been used in a long time didn't work when first plugged in, but started working later. I just had something even weirder happen, and am curious if anyone has an

Re: Control Data ad: Omega 480 "370 compatible alternative" on eBay

So, an IBM compatible machine, sold by CDC, with a DEC terminal for the console? Must have been the beginning of the end :-) On September 6, 2015 11:36:05 PM CDT, Chuck Guzis wrote: >On 09/06/2015 07:54 PM, Mark Linimon wrote: >>

Re: Interlisp-D (Medley) "display font" disks for the 1186?

On 9/7/15 8:01 AM, Al Kossow wrote: On 9/6/15 2:18 PM, Josh Dersch wrote: Lots of other disks to look through but it's a pain to get them written out; one of those HxC floppy drive emulators is looking rather nice right now :). you might want to see if

Re: A poltergeist in my machine?

Check if the -5v charge pump is stable and supplying the correct voltage. I recall a problem with a PDP 11/34 and a non-DEC memory board in which the on board pump went slowly bad. Depending on the data content and tolerance margins for the memory chips, we saw very erratic problems.

RE: RE: 21MX proms (per request)

Thanks for the answers everyone, I am writing everything down... Marc

A poltergeist in my machine?

So I've mentioned how I've seen this wierd behaviour where QBUS memory boards that hadn't been used in a long time didn't work when first plugged in, but started working later. I just had something even weirder happen, and am curious if anyone has an plausible explanations. So I had a dead M8044

Re: 21MX proms (per request)

On 9/8/2015 12:28 AM, Marc Verdiell wrote: Thanks for the answers everyone, I am writing everything down... Marc Nice to hear that people are still *writing* things down... - J.

Re: 21MX proms (per request)

But I do think there's merit in Alexandre's general argument that one could theoretically emulate the older bipolar PROMs with some mix of modern components ... and the programmable device would be (a) more easily obtainable than the old bipolar PROMs and (b) programmable with inexpensive,

Re: DEC 8235 IC? (repost)

On Mon, Sep 07, 2015 at 11:10:26AM +0200, simon wrote: > As something went wrong in posting this question, I try to repost it > here. please don't be offended by this. > > > - > Hi all. > > is there a list of equivalents

Re: 21MX proms (per request)

On 9/7/15 8:34 AM, Alexandre Souza wrote: sometimes you gotta use flash devices that are WAY faster than common EPROMs... and sometimes that won't work, because the hold time of fast devices is too short.

RE: Control Data 160 Ebay

> Anyone here get the Control Data 160 (Ebay 252070822992)? Is any of the 160 software still around (e.g. the FORTRAN compiler?) ?? Original flavor, "A" or "G" model - I don't care. And no, I didn't win the auction :-) Bob Armstrong