.segment "HEADER" ; Don’t forget to always add the iNES header to your ROM files .org $7FF0 .byte $4E,$45,$53,$1A,$02,$01,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00 .segment "CODE" ; Define a segment called "CODE" for the PRG-ROM at $8000 .org $8000 Reset: ; TODO: cld lda #100 clc adc #5 sec sbc #10 ; 95 5F BUT ITS 5E? NMI: ; NMI handler rti ; doesn't do anything IRQ: ; IRQ handler rti ; doesn't do anything .segment "VECTORS" ; Add addresses with vectors at $FFFA .org $FFFA .word NMI ; Put 2 bytes with the NMI address at memory position $FFFA .word Reset ; Put 2 bytes with the break address at memory position $FFFC .word IRQ ; Put 2 bytes with the IRQ address at memory position $FFFE