Changes
/* Oddities */
* Conditional jumps are only 8-bit relative. And unconditional jumps are only 16-bit absolute.
* The Z80 pre6502 post-decrements on PUSH PHA and postpre-increments on POPPLA, while the 6502 postZ80 pre-decrements on PHA PUSH and prepost-increments on PLAPOP, making them behave in opposite ways.
* The 6502 saves flags automatically during interrupts; while the Z80 requires PUSH AF and POP AF.
