;       
; Assemble with: DASM test.a65 -f3 -otest.bin
;

	processor 6502

; Program start
	org $8000
Start        
	sei
	cld
	lda #$00
	sta $90         ;IRQ flag
	sta $91         ;NMI flag
	cli
	lda #$00
	sta $80
	lda #$10
	sta $81
	lda #$00
	sta $82
	lda #$20
	sta $83
	lda #$00
	sta $84
	lda #$30
	sta $85

	ldx #$00
loop    lda ($80),x
	adc ($82),x
	sta ($84),x
	inx
	bne loop
	jmp Start

; IRQ handler
	org $8100
	lda #$ff
	sta $90
	rti
	
; NMI handler 
	org $8200
	lda #$ff
	sta $91
	rti

	org     $fffa
	.byte $00,$82    ;NMI
	.byte $00,$80    ;Reset
	.byte $00,$81    ;IRQ