The third argument in Spin was meant to cover a second bank of 32 pins in a device that never made it to production. In PASM, since there's no room in the instruction for a third argument, the plan was to signify which bank by the state of the carry flag, a really bad idea that I'm glad never saw the light of day.
Comments
.. waitpeq pinA,pinA 'delta between 2 pulses mov temp1,cnt '___-_______A waitpeq pinB,pinB '______-____B mov temp2,cnt sub temp2,temp1
-Phil