1.sdi

数字钟

,,,                 ORG 0
0000,C2 90,START,START:           CLR P1.0
0002,12 00 0D,,                 LCALL DELAY
0005,D2 90,,                 SETB P1.0
0007,12 00 0D,,                 LCALL DELAY
000A,02 00 00,,                 LJMP START
000D,7D 14,DELAY,DELAY:           MOV R5,#20
000F,7E 14,D1,D1:              MOV R6,#20
0011,AF F8,D2,D2:              MOV R7,248
0013,DF FE,,                 DJNZ R7,$
0015,DE FA,,                 DJNZ R6,D2
0017,DD F6,,                 DJNZ R5,D1
0019,22,,                 RET
000E,,,                 END
,,,