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Never seen one of these in the flesh before...

by uusimaki＠exdecfinland.org

They are horribly expensive - as they were as new. All the Solid state disks. That might explain why they are so rare. Kari On 21.5.2014 21:14, Mark Wickens wrote: http://www.ebay.co.uk/itm/DEC-Digital-Compaq-1-6GB-5-25-Wide-Ultra-SCSI-Sol…

11 years, 1 month

Never seen one of these in the flesh before...

by mark＠wickensonline.co.uk

http://www.ebay.co.uk/itm/DEC-Digital-Compaq-1-6GB-5-25-Wide-Ultra-SCSI-Sol… -- http://www.wickensonline.co.uk http://hecnet.eu http://declegacy.org.uk http://retrochallenge.net https://twitter.com/urbancamo

11 years, 1 month

RSX-11 setback

by b4＠gewt.net

On Wed, 21 May 2014, Cory Smelosky wrote: Sent from mobile device that advertises itself for no good reason On 21 May 2014, at 03:26, Johnny Billquist <bqt at softjar.se> wrote: On 2014-05-21 05:14, Cory Smelosky wrote: If only I could use the LTC from my busted 11/23+ :( Hmm. Hang on. The 11/23 you have (also an 11-23+ I think we now have established) have the clock device on the CPU card, unless I remember wrong. So you all need is a clock signal on the backplane. That is available in a BA23. Comes from the power supply. The dual height module has the clock too? Huh. I do have a BA23 PSU so I can do this. I have no card cage...but I have everything else needed to use it My actual chassis from the BA23 is gone...the BA23's supply needs forced airflow right? Johnny -- Cory Smelosky http://gewt.net Personal stuff http://gimme-sympathy.org Projects

11 years, 1 month

DEC Information Source

by mark＠wickensonline.co.uk

Came across this link: http://decdoc.itsx.net/dec94mds/

11 years, 1 month

RSX-11 setback

by b4＠gewt.net

Sent from mobile device that advertises itself for no good reason On 21 May 2014, at 03:26, Johnny Billquist <bqt at softjar.se> wrote: On 2014-05-21 05:14, Cory Smelosky wrote: If only I could use the LTC from my busted 11/23+ :( Hmm. Hang on. The 11/23 you have (also an 11-23+ I think we now have established) have the clock device on the CPU card, unless I remember wrong. So you all need is a clock signal on the backplane. That is available in a BA23. Comes from the power supply. The dual height module has the clock too? Huh. I do have a BA23 PSU so I can do this. I have no card cage...but I have everything else needed to use it Johnny Sent from mobile device that advertises itself for no good reason On 20 May 2014, at 21:43, Cory Smelosky <b4 at gewt.net> wrote: On Tue, 20 May 2014, John Wilson wrote: From: Cory Smelosky <b4 at gewt.net> If the MicroPDP-11/73 front panel included an LTC I would be set to get RSX-11M+ up with 1M of RAM TONIGHT. I don't have a dedicated clock device. :( Easily hacked up: http://www.dbit.com/pub/pic/kw11l.asm I used this (on a small piece of perfboard dangling from wires wrapped directly into the backplane and wrapped in paper) to get RSX11M+ running on a dual-height 11/73 with a 2 MB RAM card and a CQD-220 (with a Fuji DynaMO), all on a four-slot dual-height backplane (in a BA11-VA) which had the wires added for Q22. An 8-pin PIC is fine (with code updated as needed) but 16F84s were what I had on hand (along with a homemade burner). I PROBABLY have a PIC around here somewhere...but I don't know where and I know I DEFINTIELY don't have a crystal of that frequency. I have an arduino that I SUPPOSE could be hacked to work. Does the bus itself need any special configuration? I DO have the front panel with an LTC from the NETCOM I can borrow for awhile (No need for it until I patch ZRQCH0. It looks to connect to the normal bit on the backplane where the front panel does. I can order the parts in the meantime if I do this) John Wilson D Bit -- Cory Smelosky http://gewt.net Personal stuff http://gimme-sympathy.org Projects -- Johnny Billquist || "I'm on a bus || on a psychedelic trip email: bqt at softjar.se || Reading murder books pdp is alive! || tryin' to stay hip" - B. Idol

11 years, 1 month

RSTS/E is really picky

by mcguire＠neurotica.com

On 05/20/2014 07:18 PM, Johnny Billquist wrote: ...and won't run on my 11/34, for example. ;) (I *think*...right?) Remember, while I do use simh quite a bit, I'm primarily based on real hardware here, and I can't do "set cpu .." on that. ;) Well, yes, M+ does not officially support the 11/34. However, there was a third-party (or several) that added a 22-bit MMU to the 11/34, looking like an 11/24. And you could of course try to generate an unsupported M+ system with 18-bit addressing. I have never tried it in practice, but there is code inside M+ for this thing... That'd be fun to try! I may have to do that at some point. Yeah. My IP will not run on such machines, and I have no plans on ever implementing it. It could be done, of course, but the work is no fun, and I have so many other more important things to waste my time on... :-) Well I'd be one user, if you ever decide to do it. I'd then bring up the world's first PDP-11/34-based web server! :-) It's just a lot of work. First and foremost, the TCP driver would need to be chopped up, since it is today somewhere around 15K, and that would need to be divided into two segments of less than 8K, and then I'd have to do the calling between the segments. Second, a few tools like IFCONFIG would have to become overlaid in order to fit into memory. That is not as much work, though. Yuck! :-( Start by getting some "modern" hardware instead, and run proper M+. :-) And then start writing some code to play with the network from RSX. It's really easy to write clients or servers under RSX. I've got a LOT of PDP-11 hardware here; many of my machines are M+ capable. As I explained, I just have a personal attachment to RSX11M in particular, and the 11/34 in particular...it'd just be neat to run IP on it, that's all, but I really have no problem with never being able to. I have plenty of other machines on which to run your IP stack, and I surely will at some point soon. I've done a C library and a BASIC+2 library so far, which are really easy to use. F77 and Pascal is on the list of things to do. That'll be great! I need to carve out some time to dedicate to that. -Dave -- Dave McGuire, AK4HZ New Kensington, PA

11 years, 1 month

RSX-11 setback

by bqt＠softjar.se

On 2014-05-21 05:14, Cory Smelosky wrote: If only I could use the LTC from my busted 11/23+ :( Hmm. Hang on. The 11/23 you have (also an 11-23+ I think we now have established) have the clock device on the CPU card, unless I remember wrong. So you all need is a clock signal on the backplane. That is available in a BA23. Comes from the power supply. Johnny Sent from mobile device that advertises itself for no good reason On 20 May 2014, at 21:43, Cory Smelosky <b4 at gewt.net> wrote: On Tue, 20 May 2014, John Wilson wrote: From: Cory Smelosky <b4 at gewt.net> If the MicroPDP-11/73 front panel included an LTC I would be set to get RSX-11M+ up with 1M of RAM TONIGHT. I don't have a dedicated clock device. :( Easily hacked up: http://www.dbit.com/pub/pic/kw11l.asm I used this (on a small piece of perfboard dangling from wires wrapped directly into the backplane and wrapped in paper) to get RSX11M+ running on a dual-height 11/73 with a 2 MB RAM card and a CQD-220 (with a Fuji DynaMO), all on a four-slot dual-height backplane (in a BA11-VA) which had the wires added for Q22. An 8-pin PIC is fine (with code updated as needed) but 16F84s were what I had on hand (along with a homemade burner). I PROBABLY have a PIC around here somewhere...but I don't know where and I know I DEFINTIELY don't have a crystal of that frequency. I have an arduino that I SUPPOSE could be hacked to work. Does the bus itself need any special configuration? I DO have the front panel with an LTC from the NETCOM I can borrow for awhile (No need for it until I patch ZRQCH0. It looks to connect to the normal bit on the backplane where the front panel does. I can order the parts in the meantime if I do this) John Wilson D Bit -- Cory Smelosky http://gewt.net Personal stuff http://gimme-sympathy.org Projects -- Johnny Billquist || "I'm on a bus || on a psychedelic trip email: bqt at softjar.se || Reading murder books pdp is alive! || tryin' to stay hip" - B. Idol

11 years, 1 month

RSX-11 setback

by bqt＠softjar.se

On 2014-05-21 01:45, Cory Smelosky wrote: On Wed, 21 May 2014, Johnny Billquist wrote: ...is my backplane not 22-bit?! I know very very little about it. http://bitsavers.trailing-edge.com/pdf/clearpoint/Clearpoint_QRAM-22B_User_… is the RAM board, http://bitsavers.trailing-edge.com/pdf/cmd/MAN-000420-000_CQD-420_May94.pdf is my SCSI controller.\ I tried a MicroVAX II in this backplane earlier and it...errr started to smoke and the little display panel just said F. Smoked the uVAX? That's a bad sign. I would otherwise have guessed that maybe your memory card is not actually strapped to address 0 when you look at all 22 bits? Yeah! It smoked the VAX II! It could've been user error...but how the hell could I plug the breakout in wrong and have it smoke?! Starting to think the backplane mayyyyy be wonky. I have some vague memory that the 4 high address bits initially had power on them before they were redesignated. And that would explain your smoke... Johnny -- Johnny Billquist || "I'm on a bus || on a psychedelic trip email: bqt at softjar.se || Reading murder books pdp is alive! || tryin' to stay hip" - B. Idol

11 years, 1 month

RSX-11 setback

by wilson＠dbit.com

From: Cory Smelosky <b4 at gewt.net> Oh! Ground the "EVENT" line of the bus! Is that brought out through the front panel plug? I imagine it would be...but I know little about this backplane! Not sure, but I agree it makes sense. John Wilson D Bit

11 years, 1 month

RSX-11 setback

by b4＠gewt.net

Sent from mobile device that advertises itself for no good reason On 20 May 2014, at 23:32, John Wilson <wilson at dbit.com> wrote: From: Cory Smelosky <b4 at gewt.net> I PROBABLY have a PIC around here somewhere...but I don't know where and I know I DEFINTIELY don't have a crystal of that frequency. Then you just need a longer loop. Ahh. I have an arduino that I SUPPOSE could be hacked to work. I'm sure it could -- maybe add a 2N7000 or something as the driver since I think it's officialy an open-collector line (although I could be wrong and anyway since it's not shared, it probably doesn't matter much). Mmm. Does the bus itself need any special configuration? I can't think what this would mean. Just ground the "event" line every 50th/60th and you're golden. The Q22 mod was surprisingly easy too (since there were only four slots, with wire-wrap connectors). If the power supply hadn't later done what all power supplies eventually do, I'd still be running that box... Oh! Ground the "EVENT" line of the bus! Is that brought out through the front panel plug? I imagine it would be...but I know little about this backplane! I DO have the front panel with an LTC from the NETCOM I can borrow for awhile (No need for it until I patch ZRQCH0. Yeah bringing it in from another box should be OK as long as everyone agrees about ground reference. Ah! John Wilson D Bit

11 years, 1 month

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