Hello,
I have increassed the frec. of the crystal to 18.432 Mhz (I use this not very usual frec for generating accurate 4ms periodic interrupts) and put
DEFINE OSC 16
DEFINE HSER_TXSTA 20h
DEFINE HSER_BAUD 115200
in the testing software.
HSEROUT can output now 49 bytes in 3.340ms from inside a for..next loop (it counts an small time for jumping from the end to the begining of the for), what makes about 146Kbit/sec. The PIC used is a 16F876-20.

Ron, could you tell me what model have you pushed to 115200 baud with a 4Mhz crystal? I will try to reproduce your results. I do not like loosing time rediscovering the gun-podwer.

Last question: how can I define my 18,432Mhz oscillator to let PB generate accurate timming? Could it be done?

Thanks a lot
Maxi.