Re: Computer Reset shop, liquidation. (USA)
Exploring a MASSIVE Retro Computer Warehouse! old news, dredged up again because of a youtube jackass
Computer Reset shop, liquidation. (USA)
https://www.youtube.com/watch?v=rvM82T3C2Ik Exploring a MASSIVE Retro Computer Warehouse! via https://www.eevblog.com/forum/chat/lgr-retro-computer-warehouse/ To lessen risk of developing PTSD from watching that video, I'll mention that right at the end he explains there IS a process in place for getting access and buying stuff. Or free, if you are a museum. He gives the contact details. So it's not a case of "look at this Aladdin's Cave of retro treasures, and you're too late, now it's all bulldozed, ha ha." Which was what I thought it was going to be, through most of that video. Guy
Simulators for NCR Century series computers
Is anyone aware of a simulator for the NCR Century series computers? And no, simh doesn't do them. Thanks, Bob Armstrong
Re: Mystery DEC backplane on eBay
At 07:30 PM 16/07/2019 -0400, you wrote: >For those who saw this item: > > https://www.ebay.com/itm/183639487495 > >but didn't know what it went to (Web searches for "5409818" and "5009817" >didn't turn up anything useful for me), it turns out to be a "Configuration >2" backplane for a PDP-11/05-/10: > > http://gunkies.org/wiki/PDP-11/05#Backplane_versions > >with slots for one MM11-L memory unit, and 4 SPC slots. > > Noel > And what is this: ebay 273920073404 https://www.ebay.com/itm/Storage-Expansion-Boards-Backplanes-for-DEC-PDP-8-I-Rare-Vintage-Computer/273920073404 I see a lot of flip-chip modules with numbers the same as in my PDP 8/S. If it wasn't for the shipping costs for a big thing like that, I'd bid. Guy
Mystery DEC backplane on eBay
For those who saw this item: https://www.ebay.com/itm/183639487495 but didn't know what it went to (Web searches for "5409818" and "5009817" didn't turn up anything useful for me), it turns out to be a "Configuration 2" backplane for a PDP-11/05-/10: http://gunkies.org/wiki/PDP-11/05#Backplane_versions with slots for one MM11-L memory unit, and 4 SPC slots. Noel
Re: DEC Purchase Specifications, particularly 23-000A9-01
Don't know if you are aware of this data, might just give you some hints. http://www.ak6dn.com/PDP-11/M9312/ On Tue, Jul 16, 2019 at 4:19 PM Bill Degnan via cctalk wrote: > > On Tue, Jul 16, 2019 at 4:10 PM Mark J. Blair via cctalk < > cctalk@classiccmp.org> wrote: > > > I've been studying scanned documents for the M9312 UNIBUS > > bootstrap/terminator card because of reasons. They refer to Digital > > Equipment Corporation Purchase Specifications 23-000A9-01 and 23-000F1-01 > > for the PROMs, and I'm wondering whether those documents have been > > preserved anywhere? I'd love to see them. > > > > Ok, about the reasons: My PDP-11/34A has an M9301-YF bootstrap/terminator > > card, which doesn't have bootstrap code for a couple of the newer devices > > I'd like to use in the system such as RL02 and emulated TU58. The newer > > M9312 card looks more flexible for changing out bootstraps than the M9301 > > series. > > > > I'm working on getting my hands on an M9312, but I don't know yet whether > > I'll be able to get original PROMs for the specific bootstraps that I want. > > I haven't identified a trustworthy source for blank old-timey bipolar PROMs > > yet (and I'm not sure if I have a suitable device programmer for them), and > > I was thinking about making some sort of PROM emulations that I can swap > > around like they're going out of style. It would probably be helpful (and > > definitely interesting) if I could learn details about the original part > > specifications, such as what speed ratings DEC used. I don't have an M9312 > > in my hands yet, and I'm not yet sure about how rapidly the card performs > > its little 4-to-16 bit deserialization stunt. > > > > If 70ns access time parts are sufficient for the M9312's PROMs, then I may > > design an emulation with a 5V compatible 28 series EEPROM. If they need to > > be faster, then I may need to do something fancier. Or maybe I'll find the > > original PROMs that I need and then get distracted and wander off. It may > > well be easier to design a replacement for the entire M9312 card than > > trying to emulate the individual 512x4 bipolar PROMs, but since when do I > > do anything the easy way? I sure wouldn't be playing with 40 year old > > computers if I was concerned with practicality and ease of use! > > > > -- > > Mark J. Blair, NF6X > > http://www.nf6x.net/ > > > Mark, > This guy makes them > https://www.ebay.com/itm/DEC-PDP-11-Boot-Prom-M9312-RL02-RX01-RX02-RK06-07-nach-Wunsch/192564377085 > > He may be able to advise answers to your questions if you find the price it > too high. > > Bill
Re: DEC Purchase Specifications, particularly 23-000A9-01
On Tue, Jul 16, 2019 at 4:10 PM Mark J. Blair via cctalk < cctalk@classiccmp.org> wrote: > I've been studying scanned documents for the M9312 UNIBUS > bootstrap/terminator card because of reasons. They refer to Digital > Equipment Corporation Purchase Specifications 23-000A9-01 and 23-000F1-01 > for the PROMs, and I'm wondering whether those documents have been > preserved anywhere? I'd love to see them. > > Ok, about the reasons: My PDP-11/34A has an M9301-YF bootstrap/terminator > card, which doesn't have bootstrap code for a couple of the newer devices > I'd like to use in the system such as RL02 and emulated TU58. The newer > M9312 card looks more flexible for changing out bootstraps than the M9301 > series. > > I'm working on getting my hands on an M9312, but I don't know yet whether > I'll be able to get original PROMs for the specific bootstraps that I want. > I haven't identified a trustworthy source for blank old-timey bipolar PROMs > yet (and I'm not sure if I have a suitable device programmer for them), and > I was thinking about making some sort of PROM emulations that I can swap > around like they're going out of style. It would probably be helpful (and > definitely interesting) if I could learn details about the original part > specifications, such as what speed ratings DEC used. I don't have an M9312 > in my hands yet, and I'm not yet sure about how rapidly the card performs > its little 4-to-16 bit deserialization stunt. > > If 70ns access time parts are sufficient for the M9312's PROMs, then I may > design an emulation with a 5V compatible 28 series EEPROM. If they need to > be faster, then I may need to do something fancier. Or maybe I'll find the > original PROMs that I need and then get distracted and wander off. It may > well be easier to design a replacement for the entire M9312 card than > trying to emulate the individual 512x4 bipolar PROMs, but since when do I > do anything the easy way? I sure wouldn't be playing with 40 year old > computers if I was concerned with practicality and ease of use! > > -- > Mark J. Blair, NF6X > http://www.nf6x.net/ Mark, This guy makes them https://www.ebay.com/itm/DEC-PDP-11-Boot-Prom-M9312-RL02-RX01-RX02-RK06-07-nach-Wunsch/192564377085 He may be able to advise answers to your questions if you find the price it too high. Bill
DEC Purchase Specifications, particularly 23-000A9-01
I've been studying scanned documents for the M9312 UNIBUS bootstrap/terminator card because of reasons. They refer to Digital Equipment Corporation Purchase Specifications 23-000A9-01 and 23-000F1-01 for the PROMs, and I'm wondering whether those documents have been preserved anywhere? I'd love to see them. Ok, about the reasons: My PDP-11/34A has an M9301-YF bootstrap/terminator card, which doesn't have bootstrap code for a couple of the newer devices I'd like to use in the system such as RL02 and emulated TU58. The newer M9312 card looks more flexible for changing out bootstraps than the M9301 series. I'm working on getting my hands on an M9312, but I don't know yet whether I'll be able to get original PROMs for the specific bootstraps that I want. I haven't identified a trustworthy source for blank old-timey bipolar PROMs yet (and I'm not sure if I have a suitable device programmer for them), and I was thinking about making some sort of PROM emulations that I can swap around like they're going out of style. It would probably be helpful (and definitely interesting) if I could learn details about the original part specifications, such as what speed ratings DEC used. I don't have an M9312 in my hands yet, and I'm not yet sure about how rapidly the card performs its little 4-to-16 bit deserialization stunt. If 70ns access time parts are sufficient for the M9312's PROMs, then I may design an emulation with a 5V compatible 28 series EEPROM. If they need to be faster, then I may need to do something fancier. Or maybe I'll find the original PROMs that I need and then get distracted and wander off. It may well be easier to design a replacement for the entire M9312 card than trying to emulate the individual 512x4 bipolar PROMs, but since when do I do anything the easy way? I sure wouldn't be playing with 40 year old computers if I was concerned with practicality and ease of use! -- Mark J. Blair, NF6X http://www.nf6x.net/
Re: RF08 light panel
> From: Ethan Dicks > Did anyone here get it? Yeah, me - although I didn't expect to! Because of my work on DEC indicator panels (this one's a 10-1/2" panel, unusual): http://ana-3.lcs.mit.edu/~jnc/tech/DECIndicatorPanels.html I put in what seemed to me a lowish bid, expecting not to get it (I figured I'd make do with the image from the sale), and was rather surprised that I got it. I don't have an RF08, of course, so if anyone actually has an RF08, I'll happily do a deal to get it to you. > I did not bid because I have zero parts of an RF08 (and if I ever > make a modern RF08 emulator, I might as well make one of these to > match). Yeah, for the QSIC indicator panels, we built totally new ones, too. We took advantage of that to change the interface; the DEC originals have a wire per light, which is kind of klunky. Ours time-multiplexes a single data line (there are 'clock' and 'latch' lines too); visually, it seems to look identical to the DEC originals in operation. Noel
Artsearch software for MicroVax?
Anyone happen to have the Artsearch software for Microvax? It's my understanding the the software drove a laserdisc player. A friend has the laserdiscs but not the software. -- : Ethan O'Toole
