[sebhc] h17 and h8d disk images
ddl-cctech at danlan.com
Wed Sep 1 20:30:39 CDT 2004
Dave Dunfield <dave04a at dunfield.com> wrote:
|Does anyone know if CP/M just switches to RAM once, or does
|it toggle between ROM and RAM (say to access ROM functions)?
The operating system proper just switches to RAM; however, various
CP/M applications sold by Heath were buggered to work only on Heath
hardware. They did this by switching the ROM back in and checking
for some known bytes. I have a vague memory that something that came
with the OS did this as well.
ddl at danlan.*com
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