hERE IS THE CODE:


MOV TMOD,#0x01
REPEAT: MOV R4,#0xA1
MOV R2,#0x42 ;...........Time interval data location
MOV R3,#0x00 ;...........
MOV DPTR,#0x4400 ;........output port data location
AGAIN: CLR A
MOVC A,@A+DPTR
MOV P1,A
INC DPTR
CLR A
MOVC A,@A+DPTR
MOV P2,A
INC DPTR
MOV R0,DPL
MOV R1,DPH
MOV DPH,R2
MOV DPL,R3
CLR A
MOVC A,@A+DPTR
MOV TL0,A
INC DPTR
CLR A
MOVC A,@A+DPTR
MOV TH0,A
INC DPTR
SETB TR0
HERE: JNB TF0,HERE
CLR TR0
CLR TF0
MOV R2,DPH
MOV R3,DPL
MOV DPH,R1
MOV DPL,R0
DJNZ R4,AGAIN
SJMP REPEAT
END