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How do I get a faster interrupt timer than the centisecond ones?

April 26, 2017faster interrupt timer

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How do I get a faster interrupt timer than the centisecond ones?

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For this you require the use of IOC Timer 1, a 2MHz timer unused by RISC OS and claimable by code for use. Details of how to program the timer are available in the IOC datasheets, or you could look for various PD utilities like TimerCtrl that handle the timer for you. I am informed that the Acorn TimeCode system now lays claim to Timer 1 and that software using it is deprecated.