MANY years ago, I worked on a product designed with Turbo Pascal under
CP/M. The final hardware had the code running out of EPROM, variables in
RAM, and no OS. We made no OS calls and did system initialization (setting
up the stack pointer, etc.) before starting to execute our code (I think
it was at 0x100). This was all with a Z80. Worked pretty well. This
must've been 25 to 30 years ago...

Harold

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