While troubleshooting some code tonight I realized that maybe you need to
disable interrupts while accessing banks 1,2 or 3. I noticed that the
standard interrupt template saves off 'w' and 'status' in what it expects to
be bank 0. If I'm using bank 1,2 or 3 this is not cool with unexpected
results. The whole problem showed up when I started using 'banksel'.
Eventually I gave up and crammed everything into bank 0. Maybe it's a bank
switching problem or maybe it's an interrupt problem. But it works now that
I have given up the other 3 banks. There must be a better way to handle
things on the '877. If you have to banksel and disable interrupts for every
access above bank 0, there must be a better way :-)

Regards,
John

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