Im not really used to the 16F87. I used to use 18F877As for testing everything and since looking at Matt's boxes a 16F84A. I found the 16F87 by using the search at Microchip.com. I think this project is the first time ive used it. I guess i might aswell stick with it. I might save more from bulk buying just that 1 chip than from buyng a smaller chip.

Im not completely sure i understand your last explanation. I dont think i can use the normal PWM code for servos because TMR0 overflows every 256 instruction cycles. 1 instruction cycle takes 200ns. That means TMR0 overflows every 51200ns or 51.2us. The pulse for the servo has a range of 2000us. If i divide 2000 by 51.2 then i get 39.0625. Thats the resolution i will get for the servo. I was hoping for 256.

I know i can do what i want by using pauseus. I tested that out before. I guess pulsout would work the same way. Idealy i dont want any serial data arriving during the short pulse. Just a few microseconds difference causes the servo to move out of place. The best thing i think is to do all the receiving and processing during the 18ms where the timing doesnt have to be so accurate. I think anything between 18 and 25ms is fine. If i use a 2 byte protocol as described above then there shouldnt be a problem. The PIC can buffer those 2 bytes and wait until the short pulse has finished. The main PIC can be set not to send data faster than that so hopefully everything should work fine.

I will breadboard all of this out first ofcourse. I just have 1 servo at the moment for testing. These lights arnt the same ones that ive been making but they work in pretty much the same way. There just bigger, brighter and move lol.