> anyone have some code that shows ALL the pieces to generate a TMR0
interupt > on
> rollover?

Here are the relevant sections of code that runs on a 16C66:

;
;   Set up the timer 0 configuration.  This will be used to generate
;   pixel clock interrupts.
;
         dbankif option_reg
         movlw   b'10001000'
                 ; 1-------  port B pullups disabled (port B used for output)
                 ; -X------  RB0 interrupt edge select
                 ; --0-----  timer 0 source is instruction clock
                 ; ---X----  timer 0 external clock edge select
                 ; ----1---  prescaler assigned to watchdog timer
                 ; -----XXX  prescaler value
         movwf   option_reg
;
;   Enable interrupts.  Interrupts will be globally enabled, but the timer
;   0 interrupt is not enabled.  This will be done by the ROTATION routine
;   at the next rotation tick.
;
         dbankif tmr0
         clrf    tmr0        ;leave maximum time until next timer 0 interrupt

         dbankif intcon
         clrf    intcon      ;clear any pending interrupt flags
         bsf     intcon, gie ;globally enable interrupts

;
;   Enable the timer 0 interrupt.
;
         bsf     intcon, t0ie ;make sure timer 0 interrupts are enabled

*****************************************************************
Olin Lathrop, embedded systems consultant in Devens Massachusetts
(978) 772-3129, olin@embedinc.com, http://www.embedinc.com

--
http://www.piclist.com hint: To leave the PICList
mailto:piclist-unsubscribe-request@mitvma.mit.edu