> Apart from being messy, I'm wondering would it be really bad
> programming to disable interrupts actually inside the interrupt
> routine, and re-enable them in the main routine

No, I do that in several programs. Just use RETURN instead of
RETFIE and.re-enable by setting GIE. I don't consider it 'messy'
at all, but do remember to clear any pending IRQ sources before
re-enabling if necessary if you don't want the ISR to be entered
immediately, just as if this was during power-up initialisation
--=20
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