15 Apr
2018
15 Apr
'18
9:34 a.m.
On 04/15/2018 07:25 AM, David Griffith via cctalk wrote:
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?
The I/O on the NMOS Z80A chips is TTL-compatible. You should have
little problem dropping in the CMOS version.
The same applies for similar chips, such as the 80C85/8085, 80C86/8086, etc.
--Chuck