Andrew,

If you are using a resistor type connection to the PC you will need the
INVERT option
in the #USE RS232 line. (see page 84 of your manual)

cheers,
-larry-

>I have just started with PICs and am using the PIC-Dem1 from Microchip
>with a CCS-PCM compiler and the 16F84 chip. I wish to send data from the
PIC
>to a PC via the RS232 port.
>I am getting data through to the PC serial port but it is garbled - the
compiler
>suggests that this may be a problem with the RC oscillator in this demo
>circuit, i.e. you can not be sure of the exact frequency. I think all my
port
> settings are OK.
>Does anyone have any suggestions or must I use a different circuit with a
>crystal instead.
>
>Thanks in advance.
>
>Andrew Szkolny
>
>Veterinary Laboratories Agency
>E-mail : a.s.szkolny@vla.maff.gov.uk