p76

这些是基于dp51仿真仪的程序

	org 4000h
	MOV 30H,#38H
	MOV 38H,#40H
	MOV 40H,#48H
	MOV 48H,#90H

	MOV A,40H
	MOV R0,A
	MOV @R0,30H
	MOV 40H,38H
	MOV R0,30H
	MOV 70H,R0
	MOV 48H,#30H
	MOV A,@R0
	END