18 Jun
2008
18 Jun
'08
8:57 a.m.
On Jun 18, 2008, at 11:33 AM, Roy J. Tellason wrote:
They're all over the place. I have at least one tube of *brand
new* NMOS Z80 (not-A) chips here...cost me all of three bucks on eBay
in '06 or so. Need any?
Those I probably have some of, though I'll have to do some digging
to be
sure. The non-A version only ran at what, 2.5 MHz?
Yes, 2.5MHz.
IIRC, when
there was only the NMOS Z80/Z80A parts, this was one of
the reasons for the popularity of the Intel 8085. You could put
together a functional system for a dedicated application with
some of
the made-for-8085 peripherals (e.g. 8155, 8355, 8755), with a very
low chip count compared to what's needed for an equivalent Z80
implementation.
Are those parts even around any more though? Easy enough to find?
I haven't looked in a while... I was actually referring to those 8085-family parts up
there, but
I don't
have a whole lot of enthusiasm for that part these days, unless I
want to go
for low chip count for some specific application.
Ahh ok, sorry for my mistake...I thought you were referring to the
Z80 parts.
I suspect that where I'm probably going to come up
short is in
finding a
sufficient quantity of 40-pin wire-wrap sockets to build this
with. :-)
Are you dead-set against just buying them?
-Dave
--
Dave McGuire
Port Charlotte, FL