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