[BULK] [Color Computer] [Coco] ASM Coders - Round two!
James Diffendaffer
jdiffendaffer at yahoo.com
Wed Aug 30 17:35:11 EDT 2006
>In addition, there is *no* instruction to push X and Y on the
>stack...you must transfer them to A (the accumulator) and push
>the A register on the stack.
Oh yeah... forgot about that one. All things go through A.
>The relative branches can branch something over 120 bytes forward
>or backward. In my experience, that has been adequate for most
>loops.
Wasn't there something about jumping across page boundaries too?
>In defense of the 6502, all of the instructions take very few
>clock cycles to execute. So you may do *more* instructions and
>take *less* time to accomplish something.
I can't believe I forgot one of it's biggest problems. No position
independant code.
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