Changes

== Time ==

== Time ==

Time is kept with timers 2 and 3, while alarm interrupts are handled by timer 1; timer 0 is presumably reserved for the DMA sound channels. The OS orders the alarms by alert time, so that it only needs to keep track of the frontmost alarm.

Timer 0 is used to keep track of global time by manually incrementing a global, while timer 1 is used to generate an interrupt for alarms. The OS orders the alarms by alert time, so that it only needs to keep track of the frontmost alarm.

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