[Z88dk-users] Use of shadow registers?

[Dylan S. <dy...@al...>]

Hi all,

I've just made some changes to my ALIAC-2 single board computer's ROM,
putting the sensor monitoring routines into an interrupt service routine
(triggered by the Z80 CTC) - some of the sensors need to be waited on, and
doing a periodic poll for data ready is much better than just blocking
until data is ready.

However, on reviewing the code I had written earlier for the sensors, some
of this code does an ex af, af' or two. Since this is now getting called
during an interrupt - I'm wondering if the z88dk makes use of the shadow
registers. It would obviously be courting disaster for my interrupt
service routine to use them too if the z88dk is making use of them!

cheers.