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15586 discussions

by jg＠jordi.guillaumes.name

Hello, I have built a simh based LAVC (just because it is cool), and I have a problem. The booting/sharing/clustering works as usual (that is, awesomly), but I can't make the decnet cluster alias work. I have defined it and if I do a show exec char I see it is defined. If I do a SET HOST to the cluster alias _FROM_ any node in the cluster, it also works (as SET HOST 0), but the address does not propagate thru the LAN, so it is not visible in SHOW NET/OLD and it is regarded as unreachable from any other node. I have some real iron here, and there the cluster alias works as intended. I wonder if it is a simh-related issue. I don't really know how does this thing work internally. Since DECNET has no ARP resolution I guess the MAC address corresponding to the DECNET address is somehow added to the NIC so it "listens" to both MAC addresses (the one corresponding to the node and the cluster one). Perhaps SIMH implementation does not allow this magic. If that was the case I'd consider it something to be fixed. Any idea if I am missing something stupid before reporting this as a bug? Jordi Guillaumes i Pons jg at jordi.guillaumes.name HECnet: BITXOV::JGUILLAUMES

11 years, 7 months

DEC Information Source

by Paul_Koning＠Dell.com

Interesting! I see 4 manuals for the DECmpp . That looks familiar, but I though that this was only a design circulating around DEC and not something that ever became a product. It looks like it did. Up to 16 processor cards with 1024 processors each. Neat. paul On May 21, 2014, at 1:44 PM, Mark Wickens <mark at wickensonline.co.uk> wrote: Came across this link: http://decdoc.itsx.net/dec94mds/

11 years, 7 months

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

by uusimaki＠exdecfinland.org

Well, that was a decent price, but that won't last long. There are others as well, but at really different prices: http://www.ebay.co.uk/itm/251516666655?_trksid=p2055120.m1438.l2649&ssPageN… Kari On 21.5.2014 21:37, Mark Wickens wrote: On 21/05/2014 19:35, Kari Uusim ki wrote: 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… Blimey, when I sent the email it was $30! Mark.

11 years, 7 months

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

by mark＠wickensonline.co.uk

On 21/05/2014 19:35, Kari Uusim ki wrote: 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… Blimey, when I sent the email it was $30! Mark. -- http://www.wickensonline.co.uk http://hecnet.eu http://declegacy.org.uk http://retrochallenge.net https://twitter.com/urbancamo

11 years, 7 months

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, 7 months

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, 7 months

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, 7 months

DEC Information Source

by mark＠wickensonline.co.uk

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

11 years, 7 months

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, 7 months

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, 7 months

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