exp03.asm

5402DSP程序设计语言

;File Name :exp03.asm
;learn how to operate the I/O ports
;get some knowledge of the rts.lib file
;in the I/O space 0x0000=>8 switches
;				  0x0001=>8 LEDs
	.mmregs
	.global	_main
	.text
_main:
	stm		3100h,sp
	stm		1000h,ar1  ;define the address
	portr	8000h,*ar1   
	nop 
	nop

	portw	*ar1,8001h
	nop
	nop     
    b 		_main
    nop
    nop    
    
    .end