Quote:
Originally Posted by a/b
Set-up is ok if you preface it with e.g. $7fff to INTENA (disable everything, and btw calling exec's Disable() won't do the job properly). If you only do $c020 to INTENA, you are enabling VBL int3 but also leaving the rest as is (e.g. inherited from system, which has several other interrupts enabled).
I'd also do $0020 to INTREQ (in your case it doesn't matter I guess, but in general you might not want your interrupt to trigger right away because request bit was pre-set).
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He already does the $0020 to INTREQ with that moveq #$20 at the end.