24 Sep
1997
24 Sep
'97
4:41 a.m.
On Wed, 24 Sep 1997, Tim Shoppa wrote:
Right. At least I'm not missing 3 more CPU boards :-)
[...]
Since there
are only 4 slots in the backplane, I think I have all the
cards. What I have is a Nova CPU board (with _1_ 74181 - did this machine
really have a 4 bit ALU?)
Yep. 16-bit math operations are done serially, 4-bits at a time. Data General tended to use a fair number of
private-label TTL and DTL
chips, but (luckily for you and me) these tended to be just industry-
standard parts. I have a cross-reference marked "DG Confidential"
on every page, but I think some DG drones would come kill me if I
started passing out copies to everyone :-)
That's the sort of thing that (IMHO) should be OCR'ed and put on the
classiccmp web site. I can't believe DG would object after (lets see...)
25 years, but I suppose you should check with them first.
Tim. (shoppa(a)triumf.ca)
-tony