25 Oct
2005
25 Oct
'05
12:59 p.m.
[11/730]
Maybe. I think that there is probably a lot more logic
outside the 2901
than inside... We're still talking several boards of logic here... I doubt
all of that is microcode memory, 2901s and 74xx series stuff. :-)
The 11/730 CPU (not including the integrated disk controller or the FPU)
is 3 hex cards. It's been a long time since I've been inside one, but
from what I remmeber, the chips include
8 off 2901s
An 8085 (or something similar) as the console procesosr, along with local
ROM and RAM
A couple of serial chips + buffers (console and TU58 ports)
The microdoe RAM
2 DEC gate arrays which seem to be the memory ECC chips. I suspect
they're similar, if not the same, as ones in the 11/750
Loads and Loads of 20 pin PALs. Fortunately not copy-protected.
Some, but not a lot, of TTL
-tony