Kerem,
?
Makes no difference if the CPU is Cmos or Nmos as the bigger
difference is overall power consumed, usually it is only part of
the systems power needs.
?
The z80MC only senses power good where it de-asserts /Reset on
power on after delay.? It has no power fail or DC good sensing.
?
NMI is available but what action it causes is define in eprom
and likely not directly usable.? ?Asserting NMI causes a handler
to do effectively nothing as Bigboot has no specific use for it.
?
Start with the Z80 user manual (mostec or zilog) to understand
how the chip works.? All of this is close to the iron work so
understanding the CPU and how its used in the hardware
environment becomes the task.? The Z80MC and Basic manuals?
cannot even attempt to cover this or could if it were larger
than 200 pages.
?
The reason nothing was found for saving the CPU state or
restoring it as its assembly programming 101.? That and
likely the question asked would mislead most search engines
(AI or not).? It is not something that is unusual or rarely done.
Most Debugger software has it wired in.? Its also sometimes
called a Context Save or interrupt programming.
?
Generally the Z80 MC is many levels above those early days
of Altair where limited ram, no rom, dumb front panel,
no IO,?no software was the then context for users.? To do
anything you hand coded assembler and hand entered
a byte at a time.? Doing computers ca1975.
?
?
?
Allison
