Michael Rathbun wrote :

> >
> >R-M-W ?
> 
> The LEDs in question are pulled high through 100 ohms by port 
> c lines, and the software PWM output is done with bsf and bcf
> instructions during the timer1 interrupt.

Thought so, that's why I thought you had got hit by the
r-m-w problem. Try to update a "shadow" register with
bsf/bcf first, then update all LEDs at the same time
using (e.g.) a MOVWF.

In general, be carefull with bit write operations on PORTs.

Jan-Erik.



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