5.sdi

数字钟

,,,                ORG 0
0000,90 00 1F,START,START:          MOV DPTR,#TABLE
0003,E4,LOOP,LOOP:           CLR A
0004,93,,                MOVC A,@A+DPTR
0005,B4 01 02,,                CJNE A,#01H,LOOP1
0008,80 F6,,                JMP START
000A,F5 90,LOOP1,LOOP1:          MOV P1,A
000C,7B 14,,                MOV R3,#20
000E,12 00 14,,                LCALL DELAY
0011,A3,,                INC DPTR
0012,80 EF,,                JMP LOOP
0014,7C 14,DELAY,DELAY:          MOV R4,#20
0016,7D F8,D1,D1:             MOV R5,#248
0018,DD FE,,                DJNZ R5,$
001A,DC FA,,                DJNZ R4,D1
001C,DB F6,,                DJNZ R3,DELAY
001E,22,,                RET
001F,FE FD FB F7,TABLE,TABLE:          DB 0FEH,0FDH,0FBH,0F7H
0023,EF DF BF 7F,,                DB 0EFH,0DFH,0BFH,07FH
0027,FE FD FB F7,,                DB 0FEH,0FDH,0FBH,0F7H
002B,EF DF BF 7F,,                DB 0EFH,0DFH,0BFH,07FH
002F,7F BF DF EF,,                DB 07FH,0BFH,0DFH,0EFH
0033,F7 FB FD FE,,                DB 0F7H,0FBH,0FDH,0FEH
0037,7F BF DF EF,,                DB 07FH,0BFH,0DFH,0EFH
003B,F7 FB FD FE,,                DB 0F7H,0FBH,0FDH,0FEH
003F,00 FF 00 FF,,                DB 00H, 0FFH,00H, 0FFH
0043,01,,                DB 01H
000E,,,                END