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Peter:

1) It's Dougal, not Douglas

2) Supporting an OS on a multiple processors is more complicated and requires more locking structures than that designed to run on a uniprocessor system. I recommend you get a book on operating system design and read up on such matters.

Interrupts do have to have protection from other interrupts happening, but there's a danger on a multiprocessor system from when the interrupt actual puts the data somewhere it might modify internal data structures being used by the other processor. The only other way around this is to prevent the other processor making any system calls whilst the interrupt dedicated one is doing its stuff.

 is a RISC OS UserDougal on 25/10/03 9:24PM
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