Minimal CP/M SBC design?

[dwight elvey]

> From: ethan.dicks at usap.gov
>>
> I am a little unclear, though, about how traditional CP/M systems
> were set up for ROM and RAM. Was it common to use a "shadow ROM"
> in low mem at reset, then have the BIOS live at the top of memory?

Hi
 Most ROM based machines do some kind of shadow method to boot,
unless one has a front panel to select the boot address.
 Other than that, there is no particular reason to shadow the high
memory ROM.
 My CP/M system is completely RAM. The disk is DMA and has
a built in boot strap boot from disk. No ROM at all in my machine.
Dwight

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