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The Icon Bar: General: Multiple processors
 
  Multiple processors
  (15:54 14/12/2000)
  johnstlr (17:28 14/12/2000)
    Phlamethrower (13:58 15/6/2002)
 
Phlamethrower Message #586, posted at 15:54, 14/12/2000
Unregistered user OK, I may soon have my hands on an old ARM 6/7 board which I want to stick in my SA RPC so I can test things out on it and run old programs. I'm sure that at some time there was a program out to switch between the processors for you, but can't find it anywhere. Does anyone have a copy?

Or, does anyone know where to get it?

Or even does anyone know how it works, or how the computer handles the 2nd processor so I could make my own version?

Thanks
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johnstlr Message #587, posted at 17:28, 14/12/2000, in reply to message #586
Unregistered user If you're thinking of ARM Switcher then IIRC it was a hardware switching device, not software. I believe you had to reboot the computer as well and all it really did was stop you from having to open up your machine all the time. I can't remember who made it though.

Of course I could be completely wrong
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Phlamethrower Message #588, posted at 13:58, 15/6/2002, in reply to message #587
Unregistered user Could have been.... I know I'm not crazy enough to have thought something like that up without anything like it having ever existed.

There should theoretically be a way to do it from software though, e.g. cramming an address into the 2nd processor's PC and hoping it works. Of course there would be all the interrupts to deal with, so even if you could kick-start the other processor RISC OS isn't designed for multiple processors so it would come across some non re-entrant code and crash unhappy
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The Icon Bar: General: Multiple processors

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