Hi David!

The ISR now looks like

                ORG 002BH       ; INTERRUPT SERVICE ROUTINE FOR T2
                LJMP ISR_T2     ; for calling Inputs subroutine

                ORG 0080h       ; 
ISR_T2:         CLR TF2         ; T2 Flag cleared
                DJNZ CTR, EXIT  ; Don't call Inputs unless counter=0
                ACALL INPUTS    ; ELSE CALL INPUTS SUBROUTINE
                MOV CTR, #0AH   ; RESET COUNTER TO 0Ah
EXIT:           CLR EXF2        ; (CLR EXF2 => T2CON.6)
                RETI            ; RETURN FROM INTERRUPT


 

I shall also try to implement your suggestion regarding comments(meaninigful ofcourse).
But P1.1 is toggled continously during running of program, why? & how do I stop this?

Thanks,

Sandy