Hi,
if you set TMR0 to 255, it will overflow in the NEXT cycle!

On the other hand, it is not wise to try to load W register with a 10-bit
constant. Is it what you intend?

Regards,
Imre


On Thu, 16 Mar 2000, Muqtar Mohamed Usuf wrote:

> Thanks  for some of the hints, but couldn't get it to working after
> some more reading. Any done and dusted examples at some
>
> Environmet MPBLAB
> PIC16F84
> prescaler 1:64 see bellow
> pure asssembly code used
>
> ROUTINE WAIT
>                       MOVLW .255
>                       MOVWF TMR0
>
> DELAY1SECOND
>                       CLRWF
>                       XORWF TMRO,W
>                       BTFSS STATUS,Z
>                       GOTO DELAY1SECOND
> RETLW 0X0
>
>
> in main
>   MOVLW B '1101010101'  ; enable internal tmro 1:64
>
>
> Bad Boy from ell
>
>