> The Microchip pdf for the 16c73a advises against running async comms
> with BRGH=1 as it may be unreliable. I want to use the '73a with a
> 4Mhz clock at 9600 Baud. Acording to table 12-4 this isn't possible
> and table 12-5 doesn't recommend it ! Am I missing something ?
> The 1995/1996 databook doesn't contain any such warnings !!??

I'm using a '65A (got the BRGH bug too) at 9600 baud with only a 455KHz
clock, and it seems to work.
Surely with a 4MHz (or thereabouts) clock you can set a value in SPBRG to
achieve 9600 baud with BRGH cleared, and hence the bug avoided? In my
setup, if I clear BRGH I get 2400 baud.

* Alex_Barrett@iee.org
Robert Cooke Electronics, Norwich, UK