Got it. I'll find a text on CP/M Assembly - dos calls or whatnot.
Will
On 3/16/24 11:41 AM, John R. Hogerhuis wrote:
You'd want to use CP/M for as much I/O as possible.
CP/m runs in all-RAM mode. So the main ROM isn't mapped in lower
address space.
Though I'm sure Steve or Phil could show you how to do a far call to
the main ROM if you really need to. But you probably don't.
Of course you also can do direct I/o using the in and out instructions
without jumping to the main ROM. No ROM switching code needed.
-- John.
