ex9-1.sdi

《单片机原理实用教程——基于Proteus虚拟仿真》一书的配套光盘

,,,        ORG     0000H
0000,75 80 12,START,START:  MOV     P0,#12H         ;从P0口输出BCD码12
0003,12 00 1A,,        LCALL   DELAY           ;延时
0006,75 80 34,,        MOV     P0,#34H          ;从P0口输出BCD码34
0009,12 00 1A,,        LCALL   DELAY
000C,75 80 56,,        MOV     P0,#56H          ;从P0口输出BCD码56
000F,12 00 1A,,        LCALL   DELAY
0012,75 80 78,,        MOV     P0,#78H          ;从P0口输出BCD码78
0015,12 00 1A,,        LCALL   DELAY
0018,80 E6,,        SJMP    START            ;循环
001A,7D 14,DELAY,DELAY:  MOV     R5,#20          ;延时子程序
001C,7E 50,D2,D2:     MOV     R6,#80
001E,7F F8,D1,D1:     MOV     R7,#248
0020,DF FE,,        DJNZ    R7,$
0022,DE FA,,        DJNZ    R6,D1
0024,DD F6,,        DJNZ    R5,D2
0026,22,,        RET
000E,,,        END