.export vec_reset, vec_irq, vec_nmi

.ZEROPAGE

result: .res 1

.segment "CODE"

vec_nmi:
vec_reset:
vec_irq:


jsr_test:
    lda #$ff
    sta result
    ldx #$ff
    txs
    jsr function_1
    lda #$01
    sta result
    wai

function_2:
    pha
    pla
    rts

function_1:
    jsr function_2
    rts