Awhile back I posted a WTB for some NSC 800 CPU chips and didn't turn up
anyone having any for sale. Calls to the usual surplus places came up
empty.
I did finally manage to snag a bunch of these--more than I need.
These are the 3 MHz ceramic 40 pin DIP packages with a date code in late
1986. Supposedly NOS (they certainly don't appear to be pulls).
In case you're not familiar with these, they're basically CMOS Z80 CPUs
with 8085 timings. They have the same half-interrupt pins that the 8085
does, but NMI traps to 0066H and there's no RIM or SIM. Interface signals
are prety much 8085-compatible with the 8085-style multipexed data/address
lines. These are NOT pin-compatible with either the 8085 or the Z80, but
my need for them is to replace an 8085 with the assistance of a little glue
(mostly flipping a few signals). You can find the data sheet on the web at
http://www.alldatasheet.com/datasheet-pdf/pdf/NSC/NSC800.html.
At any rate, I've got about 15 of these to spare and will part with them
for $2 each+postage I'll give preference to those buying more than one.
Cheers,
Chuck