Hogwash. The Carmacon programmer uses a 4 MHz oscillator and is talking at 38400 bps. Andy David Covick on 03/27/2000 09:41:28 AM Please respond to pic microcontroller discussion list To: PICLIST@MITVMA.MIT.EDU cc: (bcc: Andrew Kunz/TDI_NOTES) Subject: Re: 12c508 57600bps 9600 is near the limit for a 4 MHz oscillator. Try a 12C671 and a 10 MHz resonator/crystal (not RC). > On Mon, 27 Mar 2000 14:11:07 +0200 BBRAIN writes: > > hi! > > > > I like to send data with 12c508a on 57600 bps. > > I wrote the proggi, bot it isn'n works.(508.asm for 12c508 and > > f8420m.asm for 16f84 20Mhz for test), > > I like to use RC oscillator. > > I dont know what is the problem. > > > > Can somebody help to me??? > > > > Thanks.