ORG 0000H
LJMP START
ORG 0003H
LJMP KEY_INT
ORG 000BH
RETI
ORG 0013H
LJMP JIANCHE
ORG 001BH
LJMP DINGSHI
ORG 0023H
RETI
START:
MOV SP,#2FH ;堆栈起始地址
MOV 16H,#00H ;清 0
CLR 21H
CLR 20H
MOV R5,#14H
MOV R0,#50H ;存储单元起始地址
MOV R7,#30H ;循环次数
CLEARDISP:
MOV @R0,#00H ;清 0
INC R0 ;
DJNZ R7,CLEARDISP ;
MOV 50H,#01H
MOV 51H,#01H
MOV TMOD,#10H