OK, I have added a debugging output via the previously unused UART=20
transmit pin. Thanks for the suggestion.

What I've found is one byte of the receive buffer (in bank 1) is being=20
corrupted. (from 0x3f to 0x04 or 0x24) I have checked and there no=20
register in another bank (at the same location) that is being accessed.

Why the reset makes any difference is not clear yet. I'm still on the=20
trail though.
David...

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___________________________________________
David Duffy        Audio Visual Devices P/L
Unit 8, 10 Hook St, Capalaba 4157 Australia
Ph: +61 7 38235717      Fax: +61 7 38234717
Our Web Site: www.audiovisualdevices.com.au
___________________________________________

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