9 Dec
2005
9 Dec
'05
6:52 p.m.
On 12/9/2005 at 1:38 PM Allison wrote:
The early NEC 8080 (round lid prior to 77ish) set the
flags wrong
I believe it was the sign flag though I'd have to check. After IMSAI
and others dumped them for the big they redesigned to exactly match
the Intel 8080A, NEC part was 8080AF.
I thought it was interesting that although IMSAI wouldn't use the NEC 8080A
part on their CPU cards, they freely used it in their floppy controller.
Probably to use up old stock, who knows?
Cheers,
Chuck
(still got one of them old round-lid NECs)