RE: 8-Update
Sent from Mail for Windows 10 From: Zane Healy via cctalk Sent: 17 December 2018 21:26 To: Torfinn Ingolfsen; General Discussion: On-Topic and Off-Topic Posts Subject: Re: 8-Update Are the files “platform independent”? I know very little about 3D printing, but have been tempted to get a printer for a while now. Though I’m worried about what my kids wanting to use it. :-) Zane On Dec 17, 2018, at 1:12 PM, Torfinn Ingolfsen via cctalk wrote: > > > FWIW, the easiest way to find out if somebody has made (or has tried > to make) replacement parts for anything that can be 3D-printed is to > go to thingiverse.com with your web browser. > And then search for whatever thing you need (search terms / words are > a separate subject, try as wide or as many as have time for. > When you find a part, look at pictures, comments, makes and so on to > try to figure out if this is a working part or just something somebody > has mad a 3D model of, and never tested. > Some relevant examples: > https://www.thingiverse.com/thing:360853 PDP-8 Panel Switch Toggle > https://www.thingiverse.com/thing:386762 DEC RL-02 Spindle Ground Brush > https://www.thingiverse.com/thing:2454690 PDP Stand - Mount > > HTH > On Sun, Dec 16, 2018 at 10:35 PM Al Kossow via cctalk > wrote: >> >> >> >> On 12/15/18 11:36 PM, Rod G8DGR via cctalk wrote: >> >>> However I began to think would it be possible to create a close copy of an >>> 8/e out of modern parts. >> >> Redoing the CPU in obtanium TTL would be desirable. >> >> > > > -- > mvh > Torfinn I have an .slt for the PDP-8/e lever Rod
RE: Core memory emulator using non volatile ram.
Sent from Mail for Windows 10 From: ben via cctech Sent: 17 December 2018 03:08 To: cct...@classiccmp.org Subject: Re: Core memory emulator using non volatile ram. On 12/16/2018 8:00 PM, allison via cctech wrote: > In the end, current generation CMOS ram is the easy out, battery is > small, cost is small, and > produces much less of the heat that is killer to systems. The only > reason to do that is core > cost big if you can find it for your machine. I can cost more if you > want to run an OS that > needs a fair amount of it. AC as well as it can help heat the room and > also power as in > makes the meter spin. > > So much lathering and speculation about what and how. When the point is > totally missed. > > Allison > What programs or operating sytems require non volatile core? Did DEC have any BOOTSTRAP programs in prom for the 8? A small prom and regular slow mos memory may be the solution. Ben. I’m trying to make a look and feel reproduction PDP-8/e. So the memory characteristics need to be as close as possible. An original ( and I do have one) and the copy when placed side by side should run in sync. When executing he same code – What code I couldn’t care. Rod
RE: Core memory emulator using non volatile ram.
Sent from Mail for Windows 10 From: allison via cctech Sent: 16 December 2018 03:08 To: cct...@classiccmp.org Subject: Re: Core memory emulator using non volatile ram. On 12/15/2018 01:01 PM, Guy Sotomayor Jr via cctech wrote: > FRAM or MRAM. I make extensive use of them in my projects. > > Everspin has a few (all SMT and 3.3v). As I recall they run ~$20/ea for 4Mb > (512K x 8 or 256K x 16). > > TTFN - Guy > >> On Dec 15, 2018, at 1:22 AM, Rod G8DGR via cctalk >> wrote: >> >> I have an idea to produce an MM-8 clone using RAM that acts like core when >> turned off. >> Can anybody suggest a chip that will do this? >> >> Rod Smallwood >> >> My call on this is that cmos static ram 4Bit wide does the job well I have 32K of it in my PDP-8 to get past possible failure of hard to find and get core. A Panasonic BR-1 lithium cell has enough capacity at the measured drain for about 6-7 years and the Dallas power management chip makes it a non hack. Flash, EEprom and Magnetic FRAM and MRAM) types have many unacceptable properties for a random access read write memory. It makes no difference to the PDP8(ILEFMA) that read is not destructive as it will write back as needed anyway. There is a design on the 'net for using CMOS ram in a straight forward buildable array for Omnibus with battery back up that is fine. Don;t get wraped around the axle about RMW as any sufficiently fast ram can do that without wearout. And compared to core it doesn't take much speed. EEprom and Flash work fine for read mostly disks or disk simulators. Allison Sheesh!! Well what a response. This stems from my (so far) successful major over haul of my PDP-8/e. I found one failed 7474 and one failed 8881 – replaced and now working. I think I have the rim loader toggled in and will attempt to send a paper tape image from Hyperterm Strangely I do have at least three genuine complete 4k memory sets. However I began to think would it be possible to create a close copy of an 8/e out of modern parts. As you all know I make front panels so that’s not a problem. I did manage to copy my (distorted) bezel in resin. A friend has been able to 3D print toggle switch leavers that fit and work. Vince Sylngstat has done a console board PCB layout. Power supply clearly not a problem. So what’s left? Case? Well I have one of those and I suspect a sheet metal shop would not have a problem Finally the big one – Omnibus and the connectors its made from. A 3D printing candidate? I’m going to autopsy a busted connector and see how they are constructed inside. Objectives The basic board set as original. M8300, M8310, M8320 etc. Same form factor Plug compatible – but board contents can differ from original The idea is replace one item at time until you no longer have any DEC parts. Yup a FAKE-8 I may even need a label “No part in this PDP-8/e computer was manufactured by digital equipment corporation” Rod Smallwood
8-Update
Sheesh!! Well what a response. This stems from my (so far) successful major over haul of my PDP-8/e. I found one failed 7474 and one failed 8881 – replaced and now working. I think I have the rim loader toggled in and will attempt to send a paper tape image from Hyperterm Strangely I do have at least three genuine complete 4k memory sets. The eightstoration will continue. However I began to think would it be possible to create a close copy of an 8/e out of modern parts. As you all know I make front panels so that’s not a problem. I did manage to copy my (distorted) bezel in resin. A friend has been able to 3D print toggle switch leavers that fit and work. Vince Sylngstat has done a console board PCB layout. Power supply clearly not a problem. So what’s left? Case? Well I have one of those and I suspect a sheet metal shop would not have a problem Finally the big one – Omnibus and the connectors its made from. A 3D printing candidate? I’m going to autopsy a busted connector and see how they are constructed inside. Objectives The basic board set as original. M8300, M8310, M8320 etc. Same form factor Plug compatible – but board contents can differ from original The idea is replace one item at time until you no longer have any DEC parts. Yup a FAKE-8 I may even need a label “No part in this PDP-8/e computer was manufactured by digital equipment corporation” Rod Smallwood digital equipment corporation 1975-1985 Sent from Mail for Windows 10
RE: Core memory emulator using non volatile ram.
1201.. 1201 .. Processing large amount of data... Rod Sent from Mail for Windows 10 From: Bob Rosenbloom via cctalk Sent: 15 December 2018 16:45 To: cctalk@classiccmp.org Subject: Re: Core memory emulator using non volatile ram. On 12/15/2018 1:22 AM, Rod G8DGR via cctalk wrote: > I have an idea to produce an MM-8 clone using RAM that acts like core when > turned off. > Can anybody suggest a chip that will do this? > > Rod Smallwood > > > Sent from Mail for Windows 10 > > I used Everspin MRAM chips for my PDP-8e memory cards. It's just like SRAM, fast at 35 ns, and unlimited read/write endurance. Only drawback is it's 3.3 volts only. I just used level converters. It's a magnetoresistive memory, feels just like core. $12 for a 64K x 16 chip at Digikey. Bob -- Vintage computers and electronics www.dvq.com www.tekmuseum.com www.decmuseum.org
RE: Core memory emulator using non volatile ram.
All very interesting.. 1201 alarm while I deal will all of the information Rod Sent from Mail for Windows 10 From: systems_glitch via cctalk Sent: 15 December 2018 16:40 To: Anders Nelson; General Discussion: On-Topic and Off-Topic Posts Subject: Re: Core memory emulator using non volatile ram. Another vote for RAMtron/Cypress FeRAM. I've used their FeRAMs in a number of systems, here's a writeup on my "core board" for S-100: http://www.glitchwrks.com/2016/03/29/ferroelectric-ram-part-1 I've got a bunch of FM18W08s in stock if you need one, I can stick it on a DIP adapter if needed. One thing to be aware of, RAMtron FeRAMs latch the address bus when *CS goes low, so make sure everything's set up before *CS goes low. Thanks, Jonathan On Sat, Dec 15, 2018 at 11:11 AM Anders Nelson via cctalk < cctalk@classiccmp.org> wrote: > Texas Instruments' MSP430 MCUs use FRAM. This one for example: > http://www.ti.com/product/msp430fr5969 costs ~$2.30. > > You could do some emulation in the same package, too. Not sure what your > speed requirements are of course! > > =] > -- > Anders Nelson > > +1 (517) 775-6129 > > www.erogear.com > > > On Sat, Dec 15, 2018 at 10:37 AM alan--- via cctalk > > wrote: > > > > > Ramtron had most of the patents on Ferroelectric RAM in the past. > > Cypress acquired them many years ago. > > > > New production FRAM is still sold on Digikey - in 5V SOIC packages. Not > > cheap though: > > > > 8K x 8 - $12.72 (qty 1): > > > > > > > https://www.digikey.com/product-detail/en/cypress-semiconductor-corp/FM16W08-SGTR/428-3774-1-ND/6181520 > > > > 32K x 8 - $19.54 (qty 1): > > > > > > > https://www.digikey.com/product-detail/en/cypress-semiconductor-corp/FM18W08-SGTR/428-3775-1-ND/6181516 > > > > Completely non-volatile. Faster than most SRAM of the day (130ns cycle > > time). And good for 100+ trillion write cycles and more than a century > > of endurance. > > > > -Alan > > > > > > On 2018-12-15 05:19, Paul Birkel via cctech wrote: > > > Perhaps Cypress FM1808 (32Kx8). Obsolete, but available on eBay. SOP > > > for a bit of extra challenge! > > > > > > -Original Message- > > > From: cctech [mailto:cctech-boun...@classiccmp.org] On Behalf Of Rod > > > G8DGR via cctech > > > Sent: Saturday, December 15, 2018 4:22 AM > > > To: General Discussion: On-Topic and Off-Topic Posts > > > Subject: Core memory emulator using non volatile ram. > > > > > > I have an idea to produce an MM-8 clone using RAM that acts like core > > > when turned off. > > > Can anybody suggest a chip that will do this? > > > > > > Rod Smallwood > > > > > > > > > Sent from Mail for Windows 10 > > >
Core memory emulator using non volatile ram.
I have an idea to produce an MM-8 clone using RAM that acts like core when turned off. Can anybody suggest a chip that will do this? Rod Smallwood Sent from Mail for Windows 10
PDP-8/e rebuild - update.
Went to toggle in the RIM loader – huh ! Memory address 04 stuck low. So either try another 4k core (after changing the jumpers) or... Trace the signal path. What do we think? Rod Sent from Mail for Windows 10
PDP-8/ update
Well I got there in the end. HyperTerm on an old DEC Celebris running W95 Thanks for all the input Now to move some diags. over and see if we can load them Rod Sent from Mail for Windows 10
RE: PDP-8/e
Nice try Josh - close – you have to change the crystal first and you can’t get them. Rod Smallwood - Digital Equipment Corporation 1975 – 1985 Sent from Mail for Windows 10 From: Josh Dersch via cctalk Sent: 08 December 2018 06:36 To: General Discussion: On-Topic and Off-Topic Posts Subject: Re: PDP-8/e On Fri, Dec 7, 2018 at 10:29 PM Rod G8DGR via cctalk wrote: > It can only do 110 baud !! > Unless you have an oddball SLU, this is not true -- what do you have installed? The earlier M8650 and the later M8655 can both be jumpered for higher baud rates. - Josh > > Sent from Mail for Windows 10 > > From: Pete Turnbull via cctalk > Sent: 08 December 2018 03:15 > To: cctalk@classiccmp.org > Subject: Re: PDP-8/e > > On 07/12/2018 17:46, Jon Elson via cctalk wrote: > > On 12/07/2018 11:38 AM, Rod G8DGR via cctalk wrote: > >> Oh good how do you set them to 110 baud? > >> > > Oh, WOW! Good catch, it only goes down to 300 baud! major screwup, > > ought to be reported to the developers. > > But wouldn't it be better to set the serial card in the PDP-8/E to > something faster anyway? Although on one of the serial cards, that > requires a crystal change, so though commonly done, may not be practical > for Rod. > > -- > Pete > Pete Turnbull > >
RE: PDP-8/e
I’m sure that would work but I only have an 8650 110 baud only card Rod Sent from Mail for Windows 110 baud From: Bob Rosenbloom via cctalk Sent: 08 December 2018 03:41 To: cctalk@classiccmp.org Subject: Re: PDP-8/e On 12/7/2018 7:01 PM, Pete Turnbull via cctalk wrote: > On 07/12/2018 17:44, Jon Elson via cctalk wrote: >> On 12/07/2018 11:22 AM, systems_glitch via cctalk wrote: >>> Indeed, unless you need character pacing. >>> >>> >> Actually, with the correct settings of the serial port (xon/xoff or >> CTS pin) the serial port driver should do this, too, so cat would work. > > A PDP-8/E doesn't have a CTS pin and the loaders don't support > XON/XOFF, though. > The PDP-8 needs to control the serial CTS function. This was called reader-run when using a Teletype machine. FOCAL won't load without it. You can modify the serial card (mine was an M8655) to support the function. Here's what I did: Cleaned up from Aaron Nabil's and Lyle Bickley's write up. Hack the M8655 to support reader-run by mapping it to RS-232 hardware flow control. 1. Cut the trace leading from Pin 1 of E54 (a 7400). This is the input that clears the Reader Run FF when a new character starts to come in. 2. Jumper from Pin 1/E54 to Pin 3/E38, a spare gate on a 7400 that we are going to use an inverter. 3. Tie Pin 1 and Pin 2 of E38 together, and run them to Pin 20 of E19, the UART. This supplies the signal to the reader-run FF that tells it that it's got an incoming character and to de-assert the reader-run line. Normally this is tied to the current loop receiver, we've just moved it to the UART so any received data will clear the FF. 4. Cut a ground traces on 4 of E50, a 1488 RS-232 transmitter. This is what would normally supply the continuously asserted RTS (and DTR) signal. 5. Jumper from pin 7 of E39, a 7474 flip-flop to pins 4 of E50. E39 is the "reader-run flip-flop". Now RTS follows the reader run signal. Bob -- Vintage computers and electronics www.dvq.com www.tekmuseum.com www.decmuseum.org
RE: PDP-8/e
It can only do 110 baud !! Sent from Mail for Windows 10 From: Pete Turnbull via cctalk Sent: 08 December 2018 03:15 To: cctalk@classiccmp.org Subject: Re: PDP-8/e On 07/12/2018 17:46, Jon Elson via cctalk wrote: > On 12/07/2018 11:38 AM, Rod G8DGR via cctalk wrote: >> Oh good how do you set them to 110 baud? >> > Oh, WOW! Good catch, it only goes down to 300 baud! major screwup, > ought to be reported to the developers. But wouldn't it be better to set the serial card in the PDP-8/E to something faster anyway? Although on one of the serial cards, that requires a crystal change, so though commonly done, may not be practical for Rod. -- Pete Pete Turnbull
RE: PDP-8/e
Er whats tip? Sent from Mail for Windows 10 From: Warner Losh via cctalk Sent: 07 December 2018 17:36 To: systems_glitch; General Discussion: On-Topic and Off-Topic Posts Subject: Re: PDP-8/e These days I just use tip. Warner On Fri, Dec 7, 2018, 10:25 AM systems_glitch via cctalk < cctalk@classiccmp.org wrote: > Indeed, unless you need character pacing. > > Thanks, > Jonathan > > On Fri, Dec 7, 2018 at 12:13 PM Guy Sotomayor Jr via cctalk < > cctalk@classiccmp.org> wrote: > > > I just use ‘cat’. Seems to work fine. ;-) > > > > TTFN - Guy > > > > > On Dec 7, 2018, at 4:57 AM, Pete Turnbull via cctalk < > > cctalk@classiccmp.org> wrote: > > > > > > On 07/12/2018 09:59, Rod G8DGR via cctalk wrote: > > > > > >> OK now I need a little help. > > >> Does anybody know of a terminal emulation program that will simulate > > the reader on an ASR33? > > >> I know about RIM and BIN loaders but how and what to feed them I > have > > long forgotten > > > > > > For a Unix or Linux machine, there's send and rsend, and several other > > utilities, that you can find at Kevin McQuiggin's web page: > > > http://highgate.comm.sfu.ca/pdp8/ > > > and on mine: > > > http://www.dunnington.info/public/PDP-8/ > > > > > > -- > > > Pete > > > Pete Turnbull > > > > >
RE: PDP-8/e
Oh good how do you set them to 110 baud? Rod Sent from Mail for Windows 10 From: systems_glitch via cctalk Sent: 07 December 2018 17:06 To: Jon Elson; CCTalk Subject: Re: PDP-8/e minicom on Linux/*BSD and OS X, TeraTerm under Windows. Thanks, Jonathan On Fri, Dec 7, 2018 at 11:48 AM Jon Elson via cctalk wrote: > On 12/07/2018 03:59 AM, Rod G8DGR via cctalk wrote: > > > > Does anybody know of a terminal emulation program that will simulate the > reader on an ASR33? > > I know about RIM and BIN loaders but how and what to feed them I have > long forgotten > > My PDP-8 course completion certificate is dated November 1975. > > > > Rod Smallwood > > > > > > > > Sent from Mail for Windows 10 > > > > > I use minicom on Linux, but don't know if a Windows version > is available. It has allowed me to connect to a bunch of > older devices and send data back and forth. > > Jon >
PDP-8/e
Hi All Seasons Greetings.. My PDP-8/e was long due for a major overhaul. 1. So everything out 2. Big Hoover job on the Omnibus 3. Bring up on Variac – No smoke 4. Check PSU volts. – All OK 5. Power off 6. Install minimal System – Front Panel, Three CPU cards, RFI shield, 4k Core and Bus term. 7. Yup all looks in right order 8. Power on 9. Toggle in standard AC count up program 10. Clear + Cont 11. And they are racing at Rockingham!! 12. Yup counts up just like it should. 13. Let it run for a while. 14. All stop. 15. PSU off 16. Inset Async Card (Its 110 baud only) 17. Fire up VT100. Beep - yup its alive. 18. Toggle in keyboard echo test. 19. Clear + Cont – Program runs 20. And .. yes keyboard gets echoed back. OK now I need a little help. Does anybody know of a terminal emulation program that will simulate the reader on an ASR33? I know about RIM and BIN loaders but how and what to feed them I have long forgotten My PDP-8 course completion certificate is dated November 1975. Rod Smallwood Sent from Mail for Windows 10
RE: Font for DEC indicator panels
I have a large library of inlay panel pictures. I’m sure I did some drawings with text when I did the blank panels. (Just the holes for the lamps) I’ll have a look. If not I’ll match a font to a picture. Rod Smallwood Sent from Mail for Windows 10 From: Guy Dunphy via cctalk Sent: 13 November 2018 04:30 To: Toby Thain; General Discussion: On-Topic and Off-Topic Posts Subject: Re: Font for DEC indicator panels At 09:58 PM 12/11/2018 -0500, you wrote: >On 2018-11-12 9:51 PM, Fred Cisin via cctalk wrote: >> [Top posted to avoid trimming information that might be useful to many] >> >> IFF DEC used a commercial font, then it should be possible to find it. >> >> But, it is extremely likely that they did NOT use a commercial font, and >> either had their graphics art people draw the characters as needed, or >> used reference patterns of their own that are NOT incorporated into a >> computer font. > >These panels do appear to be typeset using commercial fonts, and yes in >theory, we can track those down. > >--Toby Hmm, I posted to the list about this 3 hours ago, and it hasn't appeared yet. Is there an extra vetting process for posts that include links to web sites? I included various links to font searching sites, cleaned-up samples of the DEC fonts from my own scan (online) of a DEC PDP-8/S panel, and specific fonts I found via search tools - that are very close or identical matches to the DEC panel fonts. Should I repost, or just wait till it appears? Guy
RE: Digico computer
p...@vintage-icl-computers.com But Pete who? Sent from Mail for Windows 10 From: Dave Wade via cctalk Sent: 11 October 2018 09:23 To: 'Christian Corti'; 'General Discussion: On-Topic and Off-Topic Posts' Subject: RE: Digico computer WHOIS shows domain was renewed June time... Dave > -Original Message- > From: cctalk On Behalf Of Christian Corti > via cctalk > Sent: 11 October 2018 08:44 > To: General Discussion: On-Topic and Off-Topic Posts > > Subject: RE: Digico computer > > On Wed, 10 Oct 2018, it was written > > Did you contact the guy with the drawings? > > Yes but I haven't heard back from him, yet. At least the mail hasn't bounced. > Does anyone know the person who runs vintage-icl-computers.com ? > There is no name, address or anything there, and I wonder if the site is still > alive. > > Christian
RE: Digico computer
The core memory could still have data in it Rod Sent from Mail for Windows 10 From: Rod G8DGR via cctalk Sent: 10 October 2018 09:28 To: Christian Corti; General Discussion: On-Topic and Off-Topic Posts Subject: RE: Digico computer That looks similar to the Logo of the company I worked for ICS (Instrumental Colour Systems) The machine is identical down to the colour and the tape reader. Did you contact the guy with the drawings? Rod Sent from Mail for Windows 10 From: Christian Corti via cctalk Sent: 08 October 2018 15:25 To: General Discussion: On-Topic and Off-Topic Posts Subject: RE: Digico computer On Sat, 6 Oct 2018, Christian Corti wrote: > I can make some pictures these days. So, here they are: http://computermuseum.informatik.uni-stuttgart.de/pics/digico Some notes from my part: There were two systems, there is only the front panel and board set left from the second one. One front panel says "LOS", the other "micro 16v". Also pictures from the Pertec drive wreck that I hope can be restored to a fixed platter only drive. (PCBs not shown, but I have them) I have three memory boards in total, and the two CPU boards are different revisions. The one shown is MK2, the other is MK1 with a lot of green wires. All boards seem to be soldered by hand! Christian
RE: Digico computer
That looks similar to the Logo of the company I worked for ICS (Instrumental Colour Systems) The machine is identical down to the colour and the tape reader. Did you contact the guy with the drawings? Rod Sent from Mail for Windows 10 From: Christian Corti via cctalk Sent: 08 October 2018 15:25 To: General Discussion: On-Topic and Off-Topic Posts Subject: RE: Digico computer On Sat, 6 Oct 2018, Christian Corti wrote: > I can make some pictures these days. So, here they are: http://computermuseum.informatik.uni-stuttgart.de/pics/digico Some notes from my part: There were two systems, there is only the front panel and board set left from the second one. One front panel says "LOS", the other "micro 16v". Also pictures from the Pertec drive wreck that I hope can be restored to a fixed platter only drive. (PCBs not shown, but I have them) I have three memory boards in total, and the two CPU boards are different revisions. The one shown is MK2, the other is MK1 with a lot of green wires. All boards seem to be soldered by hand! Christian
RE: Digico computer
Hallo Christian Wie gesagt, ich habe 1974 mit diesen Systemen gearbeitet. Ich würde gerne wieder einen Lauf sehen. Ich glaube, du bist in der Nähe von Stuttgart. Ich lebte 1969/70 in Maichingen. Ich komme zwar mehrmals im Jahr nach Deutschland, aber nach Friedricshafen für einen Urlaub. Was kann ich machen um zu helfen. Wenn Sie Zugang zu den ICL-Dokumenten erhalten und sie in Großbritannien sind, könnte ich sie scannen. Sent from Mail for Windows 10 From: Christian Corti via cctalk Sent: 06 October 2018 09:50 To: General Discussion: On-Topic and Off-Topic Posts Subject: RE: Digico computer On Fri, 5 Oct 2018, it was written > http://www.vintage-icl-computers.com/icl49c > > Drawings for 16V here No, only some non-readable pictures of drawings :-( I should ask the guy to scan them reasonably. Christian
RE: Does anyone recognise these boards please
Sorry old chap – link to boards comes up as forbidden R Sent from Mail for Windows 10 From: Kevin Parker via cctalk Sent: 06 October 2018 01:42 To: cctalk@classiccmp.org Subject: Does anyone recognise these boards please Be most grateful if anyone can advise here please. Rescued a TRS-80 MC10 from deceased estate recently - it was headed for the bin but got saved. The original owner was a bit of an electronics hobbyist and his brother-in-law tossed these boards in with the bundle I grabbed. http://koken.advancedimaging.com.au/index.php?/albums/boards/ Kevin Parker
RE: Digico computer
http://www.vintage-icl-computers.com/icl49c Drawings for 16V here Sent from Mail for Windows 10 From: Christian Corti via cctalk Sent: 05 October 2018 12:42 To: cctalk@classiccmp.org Subject: Digico computer We recently got a Digico Micro 16V computer including a Pertec 3342 disk drive. It is a 16 bit minicomputer based on 74181 ALUs and a couple of 4k core memory modules. Since the condition of the system is not the best (dirt, dust, some bent wirewrap pins), I'm looking for the usual information :-)) - technical manual, schematics - software I'm thankful for any information. Christian
RE: Digico computer
Hi I worked with DIGICO’s in 1974. Is it red? Does it have a manual pull through paper tape reader? Was it made in the UK? I am most interested Rod Smallwood Sent from Mail for Windows 10 From: Christian Corti via cctalk Sent: 05 October 2018 12:42 To: cctalk@classiccmp.org Subject: Digico computer We recently got a Digico Micro 16V computer including a Pertec 3342 disk drive. It is a 16 bit minicomputer based on 74181 ALUs and a couple of 4k core memory modules. Since the condition of the system is not the best (dirt, dust, some bent wirewrap pins), I'm looking for the usual information :-)) - technical manual, schematics - software I'm thankful for any information. Christian
RE: PDP-11 in russia?
There were plenty of real PDP-11’s that found their way to Russia. Often through front companies in say Vienna. Rod Smallwood Digital Equipment Corporation 1975 – 1985 Sent from Mail for Windows 10 From: Holm Tiffe via cctalk Sent: 02 October 2018 18:01 To: Jay West; General Discussion: On-Topic and Off-Topic Posts Subject: Re: PDP-11 in russia? Jay West via cctalk wrote: > Someone has contacted me about a pdp-11 that controls a "measuring machine > dea epsilon". > > > > It appears that they want to replace the pdp-11 with a "ibm" (I'm guessing a > pc), and then they would give the pdp-11 as a gift. > > > > That is all the info I have. Are there any listmembers in Russia who would > be able to take on a project? > > > > J This for sure isn't a PDP11, it would be an "ELEKTRONIKA 60" I think. This is something like an 11/23 but with metric Connectors, PCBs are a little bit bigger as PDP11's. I do own such a beast, that's a picture from the CPU: https://www.tiffe.de/Robotron/PDP-VAX/E60/E60-01.jpg Other pictures are in the same directory (directory index is allowed). ..it's running RT11 from a 8" RX Floppy clone... Regards, Holm -- Technik Service u. Handel Tiffe, www.tsht.de, Holm Tiffe, Freiberger Straße 42, 09600 Oberschöna, USt-Id: DE253710583 i...@tsht.de Fax +49 3731 74200 Tel +49 3731 74222 Mobil: 0172 8790 741
RE: CESI VM8128 PDP8-A 128 K MOS?
M8417 MSC8DJ PDP8A 128K MOS Clone of this Sent from Mail for Windows 10 From: Paul Anderson via cctalk Sent: 24 August 2018 10:12 To: General Discussion: On-Topic and Off-Topic Posts; cct...@vax-11.org Subject: CESI VM8128 PDP8-A 128 K MOS? I have an idea what this might be, but I can't find anything to confirm it on line. Can anyone shine some light on it? Thanks, Paul
RE: QED 933 (11/93 clone) and mystery SCSI board
They re not quite the same as the DEC one. If you get into the on board firmware you will see Sent from Mail for Windows 10 From: Paul Anderson via cctalk Sent: 18 August 2018 06:14 To: General Discussion: On-Topic and Off-Topic Posts; cct...@vax-11.org Subject: QED 933 (11/93 clone) and mystery SCSI board I just found a QED 933. I've had Memtec boards before, but I don't remember anything about this one. The other board is a SI-QS 10006050-6005-B(Systems Industry?) quad height . Does anyone have any info or interest in these? Thanks, Paul
