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update apu ram management

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scawful
2024-04-24 15:42:07 -04:00
parent 2a5886e5e0
commit 8a06219353
2 changed files with 16 additions and 14 deletions
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27
src/app/emu/audio/apu.cc
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@@ -31,12 +31,26 @@ static const uint8_t bootRom[0x40] = {
void Apu::Init() {
// Set the clock frequency
clock_.SetFrequency(kApuClockSpeed);
ram.resize(0x10000);
for (int i = 0; i < 0x10000; i++) {
ram[i] = 0;
}
// Copy the boot rom into the ram at ffc0
for (int i = 0; i < 0x40; i++) {
ram[0xffc0 + i] = bootRom[i];
}
}
void Apu::Reset() {
spc700_.Reset(true);
dsp_.Reset();
ram.clear();
for (int i = 0; i < 0x10000; i++) {
ram[i] = 0;
}
// Copy the boot rom into the ram at ffc0
for (int i = 0; i < 0x40; i++) {
ram[0xffc0 + i] = bootRom[i];
}
rom_readable_ = true;
dsp_adr_ = 0;
cycles_ = 0;
@@ -51,17 +65,6 @@ void Apu::Reset() {
}
}
void Apu::Update() {
auto cycles_to_run = clock_.GetCycleCount();
for (auto i = 0; i < cycles_to_run; ++i) {
// Update the SPC700
uint8_t opcode = spc700_.read(spc700_.PC);
spc700_.ExecuteInstructions(opcode);
spc700_.PC++;
}
}
void Apu::RunCycles(uint64_t cycles) {
uint64_t sync_to =
(uint64_t)cycles *