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Minor cleanups.

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This commit is contained in:
Thomas Harte 2021-07-06 20:20:13 -04:00
parent 3e6b804896
commit 33e2a4b21c
1 changed files with 3 additions and 5 deletions
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8
Machines/Enterprise/Dave.cpp
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@ -311,6 +311,8 @@ void TimedInterruptSource::run_for(Cycles duration) {
}
Cycles TimedInterruptSource::get_next_sequence_point() const {
// Since both the 1kHz and 50Hz timers are integer dividers of the 1Hz timer, there's no need
// to factor that one in when determining the next sequence point for either of those.
switch(rate_) {
default:
case InterruptRate::OnekHz: return Cycles(250 - (two_second_counter_ % 250));
@ -328,9 +330,5 @@ Cycles TimedInterruptSource::get_next_sequence_point() const {
}
uint8_t TimedInterruptSource::get_divider_state() {
// one_hz_offset_ counts downwards, so when it crosses the halfway mark
// it enters the high part of its wave.
return
(two_second_counter_ < 250'000 ? 0x4 : 0x0) |
(programmable_level_ ? 0x1 : 0x0);
return uint8_t((two_second_counter_ / 250'000) * 4 | programmable_level_);
}