From: Benjamin Bahnsen (bb_at_game64.de)
Date: 2004-01-24 01:59:16
> 1. Use a numeric address:
>
> #define c (*(unsigned char*)0xFF)
>
> 2. Define the variable in an assembler file, declare them as external in
> your C file, and use #pragma zpsym("name") to import it as zeropage
> symbol in the generated assembler module.
>
I used the second way you described, because i want to use the variables in
assembler, too. It works perfect, thanks. But i had to rewrite the
memory.cfg to increase the zero page size. The default size was 1ah. I am
not very familar with the kernal functions of the c64 and which zero page
addresses they use. I am wondering, if it is a problem to set the zero page
size to (for example) f0h. I am still able to use file-I/O-functions or the
standard-I/O-functions of CC65? Or do these function use kernal calls, which
change the zero page?
Benjamin
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