23 Apr
2016
23 Apr
'16
12:29 p.m.
From: Jon Elson
The 11/45 and 11/70 are mostly the same processor.
...
the data paths boards and FPU are the same part numbers
'Yes' to the FPP (well, there are two versions, the FP11-B and FP11-C, but
they are both identical in the two machines).
'No' to the data paths, though: e.g. the M8100 in the /45 (the board with the
74S181's on it) is replaced by the M8130 in the /70. The two are _very_
similar, but I suspect not interchangeable (examing the prints shows minor
differences).
AFAIK, the only non-FPP board in the CPU which is interchangeable between the
two machines is the M8132 (instruction register decode & condition codes) -
and only to the KB11-D /45 variant, not the -A.
{As always, just want to be accurate! :-}
Noel