[HECnet] RSX-11 setback

[Cory Smelosky]

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
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