port.asm

dsp实验箱的多个样例程序

	.mmregs
	.global	_porta
	.global	_portb
	
_porta:
	stm		304h,ar1   ;pianxuan poacs 04h
	st		5555h,*ar1   ;0101 0101
	portw	*ar1,04h     ;write out
	ret
	
_portb: 
	stm		304h,ar1     ;pianxuan poacs 04h
	st		0aaaah,*ar1  ;1010 1010 
	portw	*ar1,04h       ;write out
	ret