Hi TND2K.

You were right about PPJOY. I plugged my ZH 6 ch into PPJOY on a mate's PC. All six channels came straight up and were useable.
It might have been an XP/Win2K thing that got me before?

Bluesky123.

There's not really any significant additional load on the CPU using parallel instead of serial.

Serial generates an Interrupt when a character is ready to receive. But the Parallel interface uses the CTC inside the PC to count the time from the Interrupt - and doesn't really
have any significant overheads that serial wouldn't, so having a PIC chip doesn't really help the CPU at all. Therefore, any increase in the frame rate due to the choice of interface would be a result of poor programming, and the CTC (PPM interface) counters would be more accurate. The extra code needed to read the CTC and respond to the Interrupt is minimal, and there are only 50 frames per second - 200 responses per second for 4 channels. Not significant.

I still havent seen a fixed CCPM transmitter yet. I'm quite curious about which model heli's they come with.

Regards
David