ok thank you mel,

additionally i just wanna check my calcs are along right lines...

ive timed the blinks and it takes 19 seconds for 10 "on and offs". on is 6 cycles and off is 6 cycles, so total is 120 cycles.

each cycle is 65536 bits.. so 120x65536/19 = 410000 hz

Fosc/4 means that its 410,000x4 = 1,640,000 hz

this seems a bit of a random clock frequency? especially when the deault internal oscialltor is 4mhz and im running the actual pic itself on an external 20mhz oscillator.

maybe i have missed something, which is the most likely thing but i cant see it at the moment