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IRQ Flag: Difference between revisions
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[[IRQ Handler]]s should read this flag (which will cause it to automatically be cleared) otherwise the [[IRQ]] will fire again immediately after [[RTI]]. | [[IRQ Handler]]s should read this flag (which will cause it to automatically be cleared) otherwise the [[IRQ]] will fire again immediately after [[RTI]]. | ||
=== See Also === | |||
* [[IRQ Disable Flag]] | |||
=== Reference === | === Reference === | ||
Latest revision as of 00:09, 19 July 2023
The IRQ Flag lives at bit 7 of TIMEUP (4211h).
IRQ Handlers should read this flag (which will cause it to automatically be cleared) otherwise the IRQ will fire again immediately after RTI.