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typo, todo

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Theron 2019-12-18 23:49:11 -06:00
parent 359459f5ad
commit c62c5b9ead
1 changed files with 6 additions and 3 deletions
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9
src/apu/mod.rs
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@ -25,7 +25,10 @@ use dmc::DMC;
// when the device needs them, which is accomplished just by calling .resume() before the main loop starts. So a large buffer really should allow for the 60Hz sleep lock. // when the device needs them, which is accomplished just by calling .resume() before the main loop starts. So a large buffer really should allow for the 60Hz sleep lock.
// We need to take a sample 44100 times per second. The CPU clocks (not steps) at 1.789773 MHz. Meaning the APU, going half as fast, // We need to take a sample 44100 times per second. The CPU clocks (not steps) at 1.789773 MHz. Meaning the APU, going half as fast,
// clocks 894,866.5 times per second. 894,866.5/44,100=20.29 APU clocks per audio sample. // clocks 894,886.5 times per second. 894,886.5/44,100=20.29 APU clocks per audio sample.
// TODO: APU runs every other CPU clock, not step. Need to tear APU out of CPU (or at least step it from outside CPU's step function)
// and connect it to audio module.
pub struct Apu { pub struct Apu {
square1: Square, square1: Square,
@ -85,9 +88,9 @@ impl Apu {
} }
// push sample to buffer // push sample to buffer
if self.remainder > 894_866.5/44_100 { // APU frequency over sample frequency if self.remainder > 894_886.5/44_100 { // APU frequency over sample frequency
self.sample_audio(); self.sample_audio();
self.remainder -= 894_866.5/44_100; self.remainder -= 894_886.5/44_100;
} }
self.remainder += 1; self.remainder += 1;