I'm trying to learn assembly (so bear with me) and I'm getting a compile error on this line:
mov byte [t_last], [t_cur]
The error is
error: invalid combination of opcode and operands
I suspect that the cause of this error is simply that its not possible for a mov instruction to move between two memory addresses, but half an hour of googling and I haven't been able to confirm this - is this the case?
Also, assuming I'm right that means I need to use a register as an intermediate point for copying memory:
mov cl, [t_cur]
mov [t_last], cl
Whats the recommended register to use (or should I use the stack instead)?
Your suspicion is correct, you can't move from memory to memory.
Any general-purpose register will do. Remember to PUSH the register if you are not sure what's inside it and to restore it back once done.