Programmable Interval Timer: Difference between revisions

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Programmable Interval Timer (view source)

Revision as of 09:42, 30 May 2012

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Making a fuss without any useful facts
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(Making a fuss without any useful facts)
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The reload value can be changed at any time, however the new value will not affect the current count until the current count is reloaded (on the next rising edge of the gate input). When this occurs counting will continue using the new reload value.
=== Warning!!! ===
The PIT isn't emulated properly on QEMU/VirtualBox. Use real machines or Bochs to test it (if you delay function works well on QEMU this doesn't mean it will work on a real machine). There is also a piece of bad PIT code in books, so look out!!!
 
== Counter Latch Command ==
Combuster
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