Lee,
?
Even with NMOS 8250 and the few TTL pieces the total power is quite small
and a battery plus 5V SMP regulator will produce very long run times before
battery goes too low.
?
Haven't measured it (as all up stack) as yet but I'd expect with parts as are
supplied under 140mA at 5V which is easy to deal with for battery unless
extended operating life is needed.
?
When compared to the Z80 S100 crate with 64K ram dual serial and
FDC and two FD55GF drives (5V at 6A, 12V 1.5A ,and -12 at .20ma) the
Z80MC is power frugal.? ?FYI that was a built in 1980 system and?
no CMOS.? The other S100 crate, very full, has a 8V 25A supply for
the 5V regulator input bus and a somewhat noisy fan to cool the
boards.? ?So something like the Z80MC is way lower power needs.
?
I have lower power Z80 CMOS systems that are built to be very
low power. its needs are clock speed dependant.? About 10ma
at 4mhz and under 3ma at 1mhz.??
?
?
Allison
