PCjr (Was Re: IBM PC hacking)

[Tony Duell]

> 
> 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