On Sep 30, 22:42, ajp166 wrote:
> From: Pete Turnbull <pete_at_dunnington.u-net.com>
> >Ah, then you'll know what the difference(s) was/were. While looking up
> >8080A and 8080 (except all my 1976 and 1979 Intel Data Books say is that
> >they're functionally and electrically compatible) I discovered that NEC
> >made two versions, both called 8080A, but one with some enhancements. I
> Ah no, not a V20 thing. The first version of the NEC 8080A was not fully
> compatable at the hardware level. It was the interrupt/hold thing.
Makes sense. Timing on the Intel part was a bit tricky, I seem to recall.
Or maybe it just seemed that way to a beginner, at the time :-)
But I just came across (while loooking for something completely different)
a reference to a BCD subtract on the NEC part (or one of them). What was
that about?
--
Pete Peter Turnbull
Network Manager
University of York
Received on Mon Oct 01 2001 - 01:48:11 BST