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dev: Clarify why updates are delayed when the MC14818 is activated

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This commit is contained in:
Andreas Sandberg 2013-06-04 10:08:21 +02:00
parent 7846f59d0d
commit a3685b0181
1 changed files with 4 additions and 2 deletions
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6
src/dev/mc146818.cc
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@ -163,8 +163,10 @@ MC146818::writeData(const uint8_t addr, const uint8_t data)
if (tickEvent.scheduled())
deschedule(tickEvent);
} else if (rega_dv_disabled(old_rega)) {
// If the divider chain goes from reset to active, we
// need to schedule a tick after precisely 0.5s.
// According to the specification, the next tick
// happens after 0.5s when the divider chain goes
// from reset to active. So, we simply schedule the
// tick after 0.5s.
assert(!tickEvent.scheduled());
schedule(tickEvent, curTick() + SimClock::Int::s / 2);
}