The original SPWM will not work with Instant Interrupts.
They both want complete control of the interrupts. (can't happen)

However, SPWM_INT will work with Instant Interrupts.
And yes, the version shown in the -14 section will work on the 18F's too.

DT_INTS-14 (SPWM_INT - Multiple Software PWM)
http://darreltaylor.com/DT_INTS-14/SPWM.html

SPWM_INT uses Timer1, so if you also want a Blinky light, you'll need to use a different Timer. (0, 2 or 3)

And if you want to use either of the SPWM versions, then you can't use skimask's code.
They are not compatible with ON INTERRUPT.
<br>