Hey Ken,

Don't know if you saw it, but some progress was made on the 12F683. It is decoding 5 channels, and encoding 4 channels. You could modify the servo output as you like in the main section, using PBP. The DT interrupts are done in assembly. (No pauses) All you would need is a $2.00 12f683, a capacitor, 3 diodes, and a breadboard.

http://www.picbasic.co.uk/forum/showthread.php?t=12657