7 Nov
1999
7 Nov
'99
3:22 p.m.
--- John B <dylanb(a)sympatico.ca> wrote:
Here is what I picked up: (lot of questions);
PDP-8I (came from a former Dec employee):
Cool haul.
I hope to have the 8I running early next week (looks
like it is plug and
play).
Very much so.
Questions:
1. How much memory is inside the 8I and what was the stack size, how much
expansion is the MM8Ia s?
I can tell you only that there are spaces in the CPU backplane for two 4K
stacks. The MM8I's _might_ be 8K each. The standard stack for the -8/i
and -8/L is 4K. I am not aware of any larger ones. The external box on
my -8/L has two stacks - total of 12K.
3. I found a board made by digital that says
"CMOS-8" (memory),, what model
PDP-8 does this work on?
Does it look like an OMNIBUS card? If so, then -8/a and -8/e/f/m. Pretty
much there are three types of -8s - transistorized, TTL FLIP-CHIP and ONMIBUS
(not including DECmates).
-ethan
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