2 Dec
2014
2 Dec
'14
7:06 a.m.
Daniel Seagraves wrote:
(Did MC become a model-B KL at some point?) so I might
not have to deal with model-A vs. model-B differences. Or I can simply assume it was
intended to run ITS on model B hardware and hack in support where required.
I'm 99.44% sure MC was born, and stayed a "model A"
ISTR someone looking at putting ITS support into the KL model B
microcode (I can't remember if it was Alan Bawden at MIT, or Stu
Grossman while at DEC). They decided not to, but I can't speak to why.
The BIG difference between "A" and "B" is that the model B implements
Extended Addressing. Section zero of an "Extended" KL should be
largely identical to a non-extended KL. Later on One Word Global byte
pointers were made to work in section zero.