Good news: we found the cause of this defect. The problem is that when you put yourself in wait on a semaphore, you *must* give a special flag to tell windows 9x "Btw, as I'm waiting and doing nothing. I'm idle!" Tricky to find! The fix will be included in next web update of InCD.
As suspected, it was only cosmetic, that is the CPU was not actually used even if the system monitor "thought" the system was busy (busy waiting a semaphore).
InCD Project Leader
Im Stoeckmaedle 18
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