15 Apr
2018
15 Apr
'18
5:24 p.m.
On 04/15/2018 05:08 PM, allison via cctalk wrote:
On 04/15/2018 10:25 AM, David Griffith via cctalk
wrote:
Quite correct, Allison. I confined my answer to "Can I drop a CMOS Z80
into an NMOS Z80 socket?"
And in particular, why not run the 10MHz part at the original 4MHz or
whatever? A 10MHz part doesn't mean that it has to run at 10MHz.
As to the rest of the question, I confess that I was blind.
--Chuck
I'm pondering upgrading the CPU of a Pacccomm Tiny-2 Mk2 radio packet
controller from a 6Mhz Z80 processor and SIO to 10Mhz parts.? My
problem is that the parts already in it appear to be NMOS.? The family
is still being made by Zilog, but for 10Mhz parts, CMOS is all they
have.? Can I just drop in CMOS, change out the crystal/oscillator and
have things work as expected?
No, and why?
Changing to CMOS can cut power drain.? However speeding up clocks can
make the packet controller
broken even if it runs!? If you keep the 6mhz clock all will be fine.