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Re: NVRAM with Z80MC

 

Hi Allison,
I have been researching how to preserve the CPU state before power down and restore on Z80 while using NVRAM without any luck.

How would that be done on the Z80 membership card? If I understand correctly, if it is a CMOS Z80 vs NMOS Z80, it is done automatically. I am not sure if the Z80 on my MC is CMOS or NMOS.

Perhaps that section of the Z80MC user manual can be expanded to include set up and use cases with NVRAM. If I can figure this out, I don’t mind providing the first draft notes.

Thank you,
Kerem

On Thu, Apr 10, 2025 at 11:02?AM ajparent1/kb1gmx via <kb1gmx=[email protected]> wrote:
Oh, when using NV-ram in Z80 systems one needs to preserve the
CPU state before power down.? And restore that state on power up.
?
Easier way is an all CMOS Z80 system, then battery to run CPU and
all is manageable.
?
?
Allison
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