>Does anyone know of a low instruction count method of inverting a
>single bit in a register.  For example inverting bit 0 in the PortB
>register.
I'm making this up as I go, but what about:

movlw     0x01
xorwf     portb

Does that work? Any bits except for bit 0 are preserved (if it's a 0
xored w/ 0, you get 0; if it's a 1 xored w/ 0, you get 1), and bit 0 is
toggled ( a 1 xored w/ 1 is 0, a 0 xored w/ 1 is 1). Right?

Dave Johnson