Ray Bellis wrote: >The RTCC counts at the instruction cycle frequency rather than the >oscillator frequency. > > > Have I missed something? I seem to get interrupts much faster than > >I should. > >Four times too fast, I think you'll find. Ray: Uhh... If this were his only problem, the interrupts would be happening four times too SLOW. -Andy -- Andrew Warren - fastfwd@ix.netcom.com Fast Forward Engineering, Vista, California Steve Addison University of Aberdeen Tillydrone Avenue Aberdeen Scotland UK AB9 2TN Tel: UK 01224 272889 Fax: UK 01224 272396