dma0:
	rep #$10 : .xl
	sep #$20 : .as
	lda dma_mode
	sta $4300
	lda dma_b_reg
	sta $4301
	lda dma_a_bank
	ldx dma_a_addr
	stx $4302
	sta $4304
	ldx dma_len
	stx $4305
	lda #$01
	sta $420b
	rts

setup_hdma:
	sep #$20 : .as
	rep #$10 : .xl
	stz $420b
	stz $420c

;	lda #$06
;	sta $420c		;enable HDMA ch. 1+2
	stz $4200		;disable V-BLANK NMI
	rts