At 17:22 06.05.98 -0400, you wrote: >I'm trying to use the watchdog timer on a PIC16C63. > >How do I turn it on? > >So far I'm able to write to the options register as follows: > >movlw b'00001111' ; Program WDT to 128 * .018ms = 2.3 seconds >movwf 81h > This is the output from a list file, where I write to the option register. It works on my system. ;G:\PLAYIT\PSU\C\PLAYPSU.C: 125: OPTION |= 0x0F; movlw 15 bsf 3,5 iorwf 1 Haavard ------------------------------------------------ HŒvard T¿rring ht@neo.no xplisit@neo.no simplisit@neo.no Norsk Elektro Optikk A/S Tel: +47 67974700 PoBox 384 Fax: +47 67974900 1471 SkŒrer http://www.neo.no Norway