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Old 16 August 2012, 11:49   #48
Toni Wilen
WinUAE developer
 
Join Date: Aug 2001
Location: Hämeenlinna/Finland
Age: 43
Posts: 20,882
AFAIK it happens because 68040/060 is "too fast", write to INTREQ don't reset physical CPU IPLx lines until after small delay (I think it was 1.5 CCK cycles).

040/060 is fast enough to restore SR from stack before Paula has cleared interrupt lines if complete exception stack frame was in data cache.
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