17 Mar
2016
17 Mar
'16
5:49 a.m.
From: Mattis Lind
I was thinking of using a M9301 board to get a console
emulator and
some different bootstraps with the 11/05. But can I just put the M9301
in the slot where the M930 normally goes?
...
M9301 goes into MUD slots. But can it go into the slot where a M930
normally sits?
I haven't personally looked into doing this in detail, so I can't give a
definitive answer, but your last question here makes alarm bells go off in my
head.
The M930 is designed to go in UNIBUS In/Out slots. These slots do have
different wiring from the A/B MUD slots. (For instance, UNIBUS In/Out slots
have _single_ pins assigned for BG4-7 and NPG, providing 'grant in' or 'grant
out' functionality, depending on if it's an In or Out slot. I don't recall
offhand what function/signal is on those pins in a MUD slot, but I'm pretty
sure it's not a grant!)
I would be fairly astonished if a device intended for a MUD slot would work
in a UNIBUS In/Out slot, and vice versa.
Noel