19 Apr
1999
19 Apr
'99
9:05 a.m.
In my limited experience with the PDP-8E, memory seems
very difficult to
come by. I'd give my eye teeth for a 32k semiconductor board, but both
semiconductor and core seems to be nowhere.
Core tends to be scarce and 100 for a good or atleast unabused stack may
not be bad. HOWEVER.... core is machine specific and you want to stay
with a coreplane compatable with the existing drivers and sense amps.
Using cores of a differnt size or material will make your life quite hard
as it will take a different half select current and also have a different
slice timing. the latter is important as PDP-8 system timing and memory
timing are pretty well locked to each other.
Unless your doing a restoration, you may consider hiding a semi ram in the
core and fake it. Do however put a battery and powerfail so that it acts
like core.... ;)
Allison