> Would the ASM part of the N-Bit Math qualify as an assembly interrupt?
Absolutely!
The math routines don't use any of PBP system variables.
But they do use an FSR, so that must be saved/restored at the beginning/end of the ISR.
There are two macro's included in N-Bit_Math that do the FSR save/restore ...
@ FSRSAVE
; -- math code here --
@ FSRREST
ADD: DT_INTS already saves/restores the FSR's, so if you're using DT_INTS, there's nothing to worry about.
hth,
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