2 Nov
2010
2 Nov
'10
11:13 a.m.
On 11/01/2010 01:00 PM, David Gesswein wrote:
This looks the most viable option, sine the cores will be the right size.
The original stack works OK so I would think that the decoding / sense /
inhibit circuitry must be OK.
I have not, but do not really want to tweak this because my original,
good, stack may not like this.
In fact, come to think of it, I might just leave that stack as is,
since location 0 is reserved for the interrupt routine return address.
And an unexpanded 8/L will not need this, or am I overlooking something ?
Regards, Jos
So I have
these 2 PDP-8/L core stacks I am trying to recover:
Is there any realistic way of getting one fully functional stack out of
these ?
I assume the 8/L core stack is the same as the 8/I. Its made up of 3 core
plane boards and the 2 diode boards. If you can figure out if one of
the planes in the really bad stack seems good you could swap it with the
other stack.
One would be perfect, if bit 3 @ adr 0 would be
alive...
If you haven't you may want to check memory current and strobe timing to
see
if its totally dead or can be adjusted back to working.