need clarification - using timer0 for delays

[Fletcher]

This is for PIC16F628

If i set the prescaler of timer0 to 1:256, it would take 256*256us to set the T0IF bit of INTCON.

so if i had some code like this:

DELAY1
BCF INTCON,T0IF :set t0if bit
MOVLW 0X00 ;Set timer0
MOVWF TMR0
BACK BTFSS INTCON,T0IF ;is t0if set yet
GOTO BACK
RETURN

would this allow for a 65ms delay? Im so confused because ive got it written down that setting timer0 to 0xFF would give me 65ms.