Argiris,

this is what I did before.
I tested with tech. scope using picmaster emulator. let experts
calculate see how accurate is it.
the reason I divided in two part because of I needed to
have blinking led at the same time so if you needed delete
"nop" put   bsf    port whatever then on next nop put bcf port
whatever.



1secdelay
             movlw     .10          ; load 10
             movwf     second       ; save it
             nop                    ;
             nop                    ;
             clrf     TMR0          ; reset timer 0
             movf     TMR0,W        ; load timer value in w to compare
             XORLW    .195          ; compare
             btfss    STATUS,Z      ; is it =
             goto     $ - 3         ; no try again
             decfsz   second,F      ; skip if second  = 0
             goto     $ - 6         ; no
             movlw    .10           ;
             movwf    second        ;
             nop                    ;
             nop                    ;
             clrf     TMR0          ;
             movf     TMR0,W        ;
             xorlw    .195          ;
             btfss    STATUS,Z      ;
             goto     $ - 3         ;
             decfsz   second,F      ;
             goto     $ - 6         ;
             return                 ;