At 06:29  24/01/00 -0700, you wrote:
>Bob Jenner wrote:
>>;Assuming the Osc is accurate at 4 Mhz, the following applies.
>>;Driving TMRO from Osc/4 (1Mhz) and not using the prescaler, an interrupt
>>;occurs every 256 us. The 16 bit counter (tickhi,ticklo) is loaded with
>>;D 3906 which gives a count every 256 x 3906 = 999936 us. 4us short
>>;of a second amounts to 2.1 seconds/non leap year...good enough for me.
>
>
>Isn't that 64us short of a second?
>Wouldn't the clock gain 5.5296 seconds per day?
>(about 33.6 minutes per year)
>
Ouch! What an idiot (me that is). Thanks Ken.
Bob Jenner
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