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