; The following symbol is used by linker config to force the module ; to get included into the output file .export __STARTUP__: absolute = 1 .import Start, IRQStub, NMIStub .segment "STARTUP" .word 0 ; +00 checksum from 7000-7fff (simple 8bit adds) .byte 1, 0, 1 ; +02 flags .byte "COPYRIGHT BIT CORPORATION", 0, $ff ; +05 copyright ; system vectors jmp Start ; +20 reset entry jmp NMIStub ; +23 nmi entry jmp IRQStub ; +26 irq entry (135 hz)