Let’s try that one more time seeing as that didn’t work...
>I assumed that he only wants some small special part of his code to
execute from RAM. In that case he could use C memcpy() to copy, but
would have to place the special code in a different segment.
Yes I think he has some self-modifying code that needs to be in a data section
so that it is copied into RAM at startup.
I hate to advertise on another list but it’s probably not so bad since we’re
trying hard to get sdcc to play well with z88dk and it’s pretty much done now.
If you're willing to use sdcc through z88dk you can do what you want. There is
a self-modifying code section defined so that the crt will copy your code into
RAM automatically at startup.
This is how it is done for sdcc in z88dk:
;; FILE: myasm.asm
SECTION smc_user ;; assign to self modifying code section
PUBLIC _myfunction ;; export function name
_myfunction:
; do stuff
ret
In your C code you can generate a reference to your function:
extern int myfunction(void);
The compile line simply adds both files:
zcc .... main.c myasm.asm
All the funnies that Alan spoke about are removed, ROM and RAM models are
accommodated and you can compress your data section if stored in ROM. The best
part is the C lib is more complete and it’s all written in assembler. If you’d
like to give it a try let me know.
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