30 Sep
2005
30 Sep
'05
3:51 p.m.
The XT controllers were (the 10 MB controller was different from the
20MB one) a peculiar beast with a bunch of proprietary LSI. When the
IIRC, the TechRef for the 10MByte controller contains a schematic with 3
chips simply labelled LSI A, LSI B and LSI C. It was fairly obvious from
the piuout that one of this was nothing other than a Z80 processor. I
think one of the others was something standard too.
-tony