I put together a JSON document with the 65C02 opcodes.
The "Illegal" instructions are lumped together under "Undocumented NOP".
Please suggest edits and/or point out mistakes.
https://github.com/ericTheEchidna/65C02-JSON

Thank you. This makes tons of sense.

Hello!
#include "ek6502.h"

unsigned char *command = ",,,,,,,,";
int main() {
unsigned char *c = "!!!!!!!!";

lcdInit();

lcdPrint(command);

lcdPrint(c);

return (0);
}

void handleInterrupt(void) {
}


Your C code has some issues. The biggest ...

It's cruft, I was lazy, but thanks for the rti vs rts.

What happens when main returns? Just to be sure nothing weird is happening after that, you could try putting while(1); before return (0); . Also, no need to put parentheses around the value in a return statement.

same results with or without an infinite loop.
Please forgive my C styling, 20 years ...

Well, the nice thing about having the generated assembly is that you can play with it to see if it does what you expect.

You can change this:

; ---------------------------------------------------------------
; int __near__ main (void ...

Is the CC65 environment configuration appropriate for your system?
Are you running the CC65 environment initialization routine before calling main?

The global string pointer is defined globally. It doesn't use the CC65 local stack.
The local string pointer is defined on the CC65 local stack.

The ...

Oh man, I've tried so many combinations that I honestly can't be sure, but I *think* it prints garbage then the good stuff

Hello!
First post here so I hope I'm doing things correctly..
I have the Ben Eater 6502 project done... mostly.
I'm using the cc65 tools and have managed to get printing to my LCD working.. sort of.
It handles printing a globally declared char string, but gets super weird printing a locally declared ...