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12

Preface, this is not really how RC.SE works. If you're looking for someone to design your hardware or write you a program, there are many sites out there where you can put a reward for someone taking the job. RC.SE is about answering your questions, as detailed as they are asked I am working on designing a Z80 computer and I would like to use a PS/2 ...


12

You can write Zilog 80 programs and games (as I do) on the Commodore 128. I exploit Z88DK, which does the magic of booting the C128 in Zilog 80 mode. The Zilog80 at 2mhz effective speed is about as fast as a MOS6502/8502@1mhz in many situations. In some situations that depend on a bigger hardware stack, the slow Zilog80@2mhz can beat the MOS6502/8502@1mhz. ...


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The problem is that you're trying to access the function parameter data, but the compiler does not expose that as a symbol to the internal assembler, so it's looking in the public, global namespace for it -- and can't find it. According to SDCC - Interfacing with Z80 assembler code, you do indeed need to access the parameters from the stack. I don't know if ...


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