The Apu class represents the Audio Processing Unit (APU) of a system. More...

#include <apu.h>

Collaboration diagram for yaze::app::emu::audio::Apu:

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Public Member Functions
	Apu (MemoryImpl &memory)

void	Init ()

void	Reset ()

void	RunCycles (uint64_t cycles)

uint8_t	SpcRead (uint16_t address)

void	SpcWrite (uint16_t address, uint8_t data)

void	SpcIdle (bool waiting)

void	Cycle ()

uint8_t	Read (uint16_t address)

void	Write (uint16_t address, uint8_t data)

auto	dsp () -> Dsp &

auto	spc700 () -> Spc700 &

Public Attributes
std::array< uint8_t, 6 >	in_ports_

std::array< uint8_t, 4 >	out_ports_

std::vector< uint8_t >	ram = std::vector<uint8_t>(0x10000, 0)

Private Attributes
bool	rom_readable_ = false

uint8_t	dsp_adr_ = 0

uint32_t	cycles_ = 0

MemoryImpl &	memory_

std::array< Timer, 3 >	timer_

ApuCallbacks	callbacks_

Dsp	dsp_ {ram}

Spc700	spc700_ {callbacks_}

Detailed Description

The Apu class represents the Audio Processing Unit (APU) of a system.

The Apu class is responsible for generating audio samples and managing the APU state. It interacts with the Memory, AudioRam, and Clock classes to read/write data and update the clock. The class also implements the Observer interface to receive notifications from the system.

IPL ROM Info: 64 kilobytes of RAM are mapped across the 16-bit memory space of the SPC-700. Some regions of this space are overlaid with special hardware functions.

Range Note: $0000-00EF Zero Page RAM $00F0-00FF Sound CPU Registers $0100-01FF Stack Page RAM $0200-FFBF RAM $FFC0-FFFF IPL ROM or RAM

The region at $FFC0-FFFF will normally read from the 64-byte IPL ROM, but the underlying RAM can always be written to, and the high bit of the Control register $F1 can be cleared to unmap the IPL ROM and allow read access to this RAM.

Definition at line 53 of file apu.h.

Constructor & Destructor Documentation

◆ Apu()

yaze::app::emu::audio::Apu::Apu ( MemoryImpl & memory )

inline

Definition at line 55 of file apu.h.

Member Function Documentation

◆ Init()

void yaze::app::emu::audio::Apu::Init ( )

Definition at line 31 of file apu.cc.

References ram.

Referenced by yaze::app::emu::SNES::Init().

◆ Reset()

void yaze::app::emu::audio::Apu::Reset ( )

Definition at line 42 of file apu.cc.

References cycles_, dsp_, dsp_adr_, in_ports_, out_ports_, ram, yaze::app::emu::audio::Dsp::Reset(), yaze::app::emu::audio::Spc700::Reset(), rom_readable_, spc700_, and timer_.

Referenced by yaze::app::emu::SNES::Reset().

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◆ RunCycles()

void yaze::app::emu::audio::Apu::RunCycles ( uint64_t cycles )

Definition at line 66 of file apu.cc.

References cycles_, memory_, yaze::app::emu::memory::MemoryImpl::pal_timing(), yaze::app::emu::audio::Spc700::RunOpcode(), and spc700_.

Referenced by yaze::app::emu::SNES::CatchUpApu().

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◆ SpcRead()

uint8_t yaze::app::emu::audio::Apu::SpcRead ( uint16_t address )

Definition at line 192 of file apu.cc.

References Cycle(), and Read().

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◆ SpcWrite()

void yaze::app::emu::audio::Apu::SpcWrite	(	uint16_t	address,
		uint8_t	data )

Definition at line 197 of file apu.cc.

References Cycle(), and Write().

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◆ SpcIdle()

void yaze::app::emu::audio::Apu::SpcIdle ( bool waiting )

Definition at line 202 of file apu.cc.

References Cycle().

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◆ Cycle()

void yaze::app::emu::audio::Apu::Cycle ( )

Definition at line 76 of file apu.cc.

References yaze::app::emu::audio::Dsp::Cycle(), cycles_, dsp_, and timer_.

Referenced by SpcIdle(), SpcRead(), and SpcWrite().

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◆ Read()

uint8_t yaze::app::emu::audio::Apu::Read ( uint16_t address )

Definition at line 101 of file apu.cc.

References dsp_, dsp_adr_, in_ports_, ram, yaze::app::emu::audio::Dsp::Read(), rom_readable_, and timer_.

Referenced by SpcRead().

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◆ Write()

void yaze::app::emu::audio::Apu::Write	(	uint16_t	address,
		uint8_t	data )

Definition at line 138 of file apu.cc.

References dsp_, dsp_adr_, in_ports_, out_ports_, ram, rom_readable_, timer_, and yaze::app::emu::audio::Dsp::Write().

Referenced by SpcWrite().

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◆ dsp()

auto yaze::app::emu::audio::Apu::dsp ( ) -> Dsp &

inline

Definition at line 70 of file apu.h.

References dsp_.

Referenced by yaze::app::emu::SNES::RunCycle(), and yaze::app::emu::SNES::SetSamples().

◆ spc700()

auto yaze::app::emu::audio::Apu::spc700 ( ) -> Spc700 &

inline

Definition at line 71 of file apu.h.

References spc700_.

Member Data Documentation

◆ in_ports_

std::array<uint8_t, 6> yaze::app::emu::audio::Apu::in_ports_

Definition at line 74 of file apu.h.

Referenced by Read(), Reset(), Write(), and yaze::app::emu::SNES::WriteBBus().

◆ out_ports_

std::array<uint8_t, 4> yaze::app::emu::audio::Apu::out_ports_

Definition at line 75 of file apu.h.

Referenced by yaze::app::emu::SNES::ReadBBus(), Reset(), and Write().

◆ ram

std::vector<uint8_t> yaze::app::emu::audio::Apu::ram = std::vector<uint8_t>(0x10000, 0)

Definition at line 76 of file apu.h.

Referenced by Init(), Read(), Reset(), and Write().

◆ rom_readable_

bool yaze::app::emu::audio::Apu::rom_readable_ = false

private

Definition at line 79 of file apu.h.

Referenced by Read(), Reset(), and Write().

◆ dsp_adr_

uint8_t yaze::app::emu::audio::Apu::dsp_adr_ = 0

private

Definition at line 81 of file apu.h.

Referenced by Read(), Reset(), and Write().

◆ cycles_

uint32_t yaze::app::emu::audio::Apu::cycles_ = 0

private

Definition at line 82 of file apu.h.

Referenced by Cycle(), Reset(), and RunCycles().

◆ memory_

MemoryImpl& yaze::app::emu::audio::Apu::memory_

private

Definition at line 84 of file apu.h.

Referenced by RunCycles().

◆ timer_

std::array<Timer, 3> yaze::app::emu::audio::Apu::timer_

private

Definition at line 85 of file apu.h.

Referenced by Cycle(), Read(), Reset(), and Write().

◆ callbacks_

ApuCallbacks yaze::app::emu::audio::Apu::callbacks_

private

Initial value:

= {
      [&](uint16_t adr, uint8_t val) { SpcWrite(adr, val); },
      [&](uint16_t adr) { return SpcRead(adr); },
      [&](bool waiting) { SpcIdle(waiting); },
  }

Definition at line 87 of file apu.h.

◆ dsp_

Dsp yaze::app::emu::audio::Apu::dsp_ {ram}

private

Definition at line 92 of file apu.h.

Referenced by Cycle(), dsp(), Read(), Reset(), and Write().

◆ spc700_

Spc700 yaze::app::emu::audio::Apu::spc700_ {callbacks_}

private

Definition at line 93 of file apu.h.

Referenced by Reset(), RunCycles(), and spc700().

The documentation for this class was generated from the following files:

src/app/emu/audio/apu.h
src/app/emu/audio/apu.cc

	yaze 0.2.0 Link to the Past ROM Editor

Public Member Functions

Public Attributes

Private Attributes

Detailed Description

Constructor & Destructor Documentation

◆ Apu()

Member Function Documentation

◆ Init()

◆ Reset()

◆ RunCycles()

◆ SpcRead()

◆ SpcWrite()

◆ SpcIdle()

◆ Cycle()

◆ Read()

◆ Write()

◆ dsp()

◆ spc700()

Member Data Documentation

◆ in_ports_

◆ out_ports_

◆ ram

◆ rom_readable_

◆ dsp_adr_

◆ cycles_

◆ memory_

◆ timer_

◆ callbacks_

◆ dsp_

◆ spc700_