I have gotten the best results by writing the entire routine in assembly and
then linking it with C code. The calling convention isn't well documented,
but not hard to understand by looking at the list files.
Here is a sample routine that takes a single 16 bit argument and returns a
32 bit result
Hello,
I needed a Port I/O routine for the Z80 that would accept the address as a
parameter, so I wrote 2 functions with inline ASM to do it. I would have used
sfr, but the addresses need to be passed as a parameter (ie. I can't just
#define or hardcode them).
I'm pretty new to ASM, and wi
