On Tuesday 31 July 2001 12:24, you wrote:
> - Obtain the slot currently switched on page 1 by reading the slot
> selction register, connecting the slot of page 1 into page 3 and reading
> address #FFFF. Save this slot+subslot value on OLDSLOT.
You should ofcourse complement what you read from #FFFF. I assume your code
does, but you didn't mention it here.
> - Save contents of work area #FCC5 to #FCC8 (the sublot registers
> saving area) as OLDSUB
What are these for, anyway?
> - Switch NestorMan slot on page 1 with ENASLT
Watch out: ENASLT does an EI.
Since you store values on fixed addresses, the interrupt handler is not
re-entrant. You have to guard against interrupt-within-interrupt. The
previous code you sent to the list did that (interrupt in progress flag).
Bye,
Maarten
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