.segment "HEADER"
    .byte $4E, $45, $53, $1A ;Nes header identifier
    .byte 2 ;2x 16KB PRG code
    .byte 1 ; 1x 8KB CHR Data
    .byte $01, $00 ; mapper 0, vertical mirroring

.segment "VECTORS"
    .addr 0 ; nmi interrupt
    .addr reset ; reset interrupt
    .addr 0 ; external interrupt

.segment "STARTUP"

.segment "CODE"

reset:
    ldx #3
    inx
    inx
    dex

    ldy #7
    dey
    rts