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Allows SN76489 consumers to apply an additional divider that reduces computation.

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Thomas Harte
2018-03-01 18:51:05 -05:00
parent 7890506b16
commit 86239469e7
3 changed files with 15 additions and 8 deletions
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Components/SN76489/SN76489.cpp
+6 -1
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@@ -8,11 +8,12 @@
#include "SN76489.hpp"
#include <cassert>
#include <cmath>
using namespace TI;
SN76489::SN76489(Personality personality, Concurrency::DeferringAsyncTaskQueue &task_queue) : task_queue_(task_queue) {
SN76489::SN76489(Personality personality, Concurrency::DeferringAsyncTaskQueue &task_queue, int additional_divider) : task_queue_(task_queue) {
// Build a volume table.
double multiplier = pow(10.0, -0.1);
double volume = 8191.0f;
@@ -37,6 +38,10 @@ SN76489::SN76489(Personality personality, Concurrency::DeferringAsyncTaskQueue &
shifter_is_16bit_ = true;
break;
}
assert((master_divider_period_ % additional_divider) == 0);
assert(additional_divider < master_divider_period_);
master_divider_period_ /= additional_divider;
}
void SN76489::set_register(uint8_t value) {