Instructions
6502 CPU Divergencies
Testing, let’s see asdfasdf;
ApplePy: Does not implement decimal mode. JSnes: Seens to have some problems on brach instructions (BEQ, BNE )
Instruction |
ApplePy |
Arbne |
JSnes |
Py3NES |
Py65 |
Pyntendo |
6502js |
|---|---|---|---|---|---|---|---|
adc immediate with bcd |
NOT |
NOT |
NOT |
NOT |
OK |
OK |
OK |
beq |
OK |
OK |
NOT |
OK |
OK |
OK |
OK |
bne |
OK |
OK |
NOT |
OK |
OK |
OK |
OK |
brk |
NOT |
NOT |
NOT |
NOT |
OK |
OK |
OK |
irq interrupt |
NOT |
NOT |
NOT |
NOT |
NOT |
NOT |
NOT |
jsr |
NOT |
OK |
NOT |
OK |
NOT |
OK |
NOT |
jsr stack pointer |
NOT |
OK |
NOT |
OK |
NOT |
OK |
NOT |
jsr with illegal opcode |
NOT |
OK |
OK |
NOT |
OK |
NOT |
NOT |
nmi interrupt |
NOT |
NOT |
NOT |
NOT |
NOT |
NOT |
NOT |
php |
OK |
OK |
NOT |
OK |
OK |
OK |
OK |
pla |
OK |
OK |
OK |
OK |
OK |
OK |
NOT |
pla n flag set |
OK |
OK |
OK |
OK |
OK |
OK |
NOT |
pla z flag set |
OK |
OK |
OK |
OK |
OK |
OK |
NOT |
plp |
NOT |
NOT |
NOT |
NOT |
NOT |
NOT |
NOT |
rst |
NOT |
NOT |
NOT |
NOT |
NOT |
NOT |
NOT |
rti |
OK |
OK |
NOT |
OK |
OK |
OK |
NOT |
rts |
OK |
OK |
NOT |
OK |
OK |
OK |
NOT |
sbc immediate with bcd |
NOT |
OK |
OK |
OK |
OK |
OK |
OK |
tsx |
OK |
OK |
NOT |
OK |
OK |
OK |
OK |
txs |
OK |
OK |
NOT |
OK |
OK |
OK |
OK |