这个是用P1口接发光管的汇编程序

ORG 0000H INITIA: LJMP 0200H

ORG 0800H DELAY: MOV R7,#10 DEL1: MOV R6,#125 DEL2: MOV R5,#200 DJNZ R5,$ DJNZ R6,DEL2 DJNZ R7,DEL1 RET

ORG 0200H FAS0: MOV A,#01H LOOP: MOV P1,A LCALL DELAY RR A SJMP LOOP END