> set the configuration bits correctly for an RC oscillator? >=20 > Yes, I am sure Hi Peter, You have _EXTRC_CLKOUT in your config ? I use ExtRC on a few 16F projects and apart from drift I've had no problems with it. The tables in the F88 datasheet are a reasonable guide --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .