asm.asm

该程序用来测试89C51与IDE硬盘的接口

ADELAY SEGMENT CODE 
PUBLIC _DELAY ;
RSEG ADELAY ;
	
_DELAY: mov a,r7;
delay0: mov r6,a;
delay1: mov r5,#0ffh;
delay2: nop ;
        djnz r5,delay2;
        djnz r6,delay1;
        nop ;
       ret ;
        end