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Old 10 August 2014, 22:22   #30

phx's Avatar
Join Date: Nov 2009
Location: Herford / Germany
Posts: 1,067
Originally Posted by Toni Wilen View Post

EDIT2: It has to be hardware semaphore. I think this problem is now solved.
Confirmed! When I clear bit 0 of REG_LOCK on the 68k, then the PPC stops and continues working as soon as I set the bit. It also works from the PPC side. When setting it the 68k is stopped (which results in a system freeze, as PowerUp is controlled by 68k), but I verified that the PPC continues working after that.

It would be interesting to see if you can lock yourself out by clearing the bit twice (Probably not)
Twice on the same CPU? No, that makes no difference. On different CPUs? No, that's not possible as the other CPU is stopped.
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