scottr d19b3500e3 Define single-instruction implementations of setsoft*() and siroff(),
and declare ssir as volatile.  This avoids the problem of lost softints
should a hard interrupt cause a softint to be flagged while we are
clearing a different one.

Idea from atari mtpr.h, modified/optimized by me.
1997-01-20 05:08:00 +00:00
..
1997-01-18 01:59:32 +00:00
1997-01-17 03:43:56 +00:00