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add memory namespace, update comments

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This commit is contained in:
scawful
2024-04-13 23:56:41 -05:00
parent e45322d070
commit f653517026
14 changed files with 153 additions and 61 deletions
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28
src/app/emu/audio/apu.h
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@@ -15,12 +15,32 @@ namespace app {
namespace emu {
namespace audio {
using namespace memory;
/**
*
*
*/
const int kApuClockSpeed = 1024000; // 1.024 MHz
const int apuSampleRate = 32000; // 32 KHz
const int apuClocksPerSample = 64; // 64 clocks per sample
/**
* @class Apu
* @brief 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.
*
* @par 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
* @par Range Note
* $0000-00EF Zero Page RAM
* $00F0-00FF Sound CPU Registers
* $0100-01FF Stack Page RAM
@@ -31,13 +51,7 @@ namespace audio {
* 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.
*
*/
const int kApuClockSpeed = 1024000; // 1.024 MHz
const int apuSampleRate = 32000; // 32 KHz
const int apuClocksPerSample = 64; // 64 clocks per sample
class Apu : public Observer {
public:
Apu(MemoryImpl &memory, AudioRam &aram, Clock &clock)

29
src/app/emu/audio/dsp.h
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@@ -16,7 +16,6 @@ using SampleFetcher = std::function<uint8_t(uint16_t)>;
using SamplePusher = std::function<void(int16_t)>;
/**
*
* The S-DSP is a digital signal processor generating the sound data.
*
* A DSP register can be selected with $F2, after which it can be read or
@@ -35,21 +34,19 @@ using SamplePusher = std::function<void(int16_t)>;
* There are 8 voices, numbered 0 to 7.
* Each voice X has 10 registers in the range $X0-$X9.
*
* Name Address Bits Notes
* VOL (L) $X0 SVVV VVVV Left channel volume, signed.
* VOL (R) $X1 SVVV VVVV Right channel volume, signed.
* P (L) $X2 LLLL LLLL Low 8 bits of sample pitch.
* P (H) $X3 --HH HHHH High 6 bits of sample pitch.
* SCRN $X4 SSSS SSSS Selects a sample source entry from the
* directory ADSR (1) $X5 EDDD AAAA ADSR enable (E), decay rate (D),
* attack rate (A).
* ADSR (2) $X6 SSSR RRRR Sustain level (S), release rate (R).
* GAIN $X7 0VVV VVVV 1MMV VVVV Mode (M), value (V).
* ENVX $X8 0VVV VVVV Reads current 7-bit value of ADSR/GAIN
* envelope.
* OUTX $X9 SVVV VVVV Reads signed 8-bit value of current
* sample wave multiplied by ENVX, before applying VOL.
*
* | Name | Address | Bits | Notes |
* |---------|---------|-----------|--------------------------------------------------------|
* | VOL (L) | $X0 | SVVV VVVV | Left channel volume, signed. |
* | VOL (R) | $X1 | SVVV VVVV | Right channel volume, signed. |
* | P (L) | $X2 | LLLL LLLL | Low 8 bits of sample pitch. |
* | P (H) | $X3 | --HH HHHH | High 6 bits of sample pitch. |
* | SCRN | $X4 | SSSS SSSS | Selects a sample source entry from the directory. |
* | ADSR (1)| $X5 | EDDD AAAA | ADSR enable (E), decay rate (D), attack rate (A). |
* | ADSR (2)| $X6 | SSSR RRRR | Sustain level (S), release rate (R). |
* | GAIN | $X7 | 0VVV VVVV 1MMV VVVV | Mode (M), value (V). |
* | ENVX | $X8 | 0VVV VVVV | Reads current 7-bit value of ADSR/GAIN envelope. |
* | OUTX | $X9 | SVVV VVVV | Reads signed 8-bit value of current sample wave |
* | | | | multiplied by ENVX, before applying VOL. |
*/
class DigitalSignalProcessor {

17
src/app/emu/audio/spc700.h
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@@ -11,6 +11,9 @@ namespace app {
namespace emu {
namespace audio {
/**
* @brief AudioRam is an interface for the Audio RAM used by the SPC700.
*/
class AudioRam {
public:
virtual ~AudioRam() = default;
@@ -20,6 +23,9 @@ class AudioRam {
virtual void write(uint16_t address, uint8_t value) = 0;
};
/**
* @brief AudioRamImpl is an implementation of the AudioRam interface.
*/
class AudioRamImpl : public AudioRam {
static const int ARAM_SIZE = 0x10000;
std::vector<uint8_t> ram = std::vector<uint8_t>(ARAM_SIZE, 0);
@@ -41,6 +47,17 @@ class AudioRamImpl : public AudioRam {
}
};
/**
* @class Spc700
* @brief The Spc700 class represents the SPC700 processor.
*
* The Spc700 class provides the functionality to execute instructions, read and
* write memory, and handle various addressing modes. It also contains registers
* and flags specific to the SPC700.
*
* @note This class assumes the existence of an `AudioRam` object for memory
* access.
*/
class Spc700 {
private:
AudioRam& aram_;

4
src/app/emu/cpu/cpu.h
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@@ -38,7 +38,9 @@ class InstructionEntry {
const int kCpuClockSpeed = 21477272; // 21.477272 MHz
class Cpu : public Memory, public Loggable, public core::ExperimentFlags {
class Cpu : public memory::Memory,
public Loggable,
public core::ExperimentFlags {
public:
explicit Cpu(Memory& mem, Clock& vclock) : memory(mem), clock(vclock) {}
enum class UpdateMode { Run, Step, Pause };

11
src/app/emu/memory/dma.cc
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@@ -5,8 +5,9 @@
namespace yaze {
namespace app {
namespace emu {
namespace memory {
void DMA::StartDMATransfer(uint8_t channelMask) {
void DirectMemoryAccess::StartDMATransfer(uint8_t channelMask) {
for (int i = 0; i < 8; ++i) {
if ((channelMask & (1 << i)) != 0) {
Channel& ch = channels[i];
@@ -20,8 +21,9 @@ void DMA::StartDMATransfer(uint8_t channelMask) {
// Determine the transfer size based on the DMAPn register
bool transferTwoBytes = (ch.DMAPn & 0x40) != 0;
// Perform the DMA transfer based on the channel parameters
std::cout << "Starting DMA transfer for channel " << i << std::endl;
// Perform the DirectMemoryAccess transfer based on the channel parameters
std::cout << "Starting DirectMemoryAccess transfer for channel " << i
<< std::endl;
for (uint16_t j = 0; j < ch.DASn; ++j) {
// Read a byte or two bytes from memory based on the transfer size
@@ -46,7 +48,7 @@ void DMA::StartDMATransfer(uint8_t channelMask) {
MDMAEN = channelMask; // Set the MDMAEN register to the channel mask
}
void DMA::EnableHDMATransfers(uint8_t channelMask) {
void DirectMemoryAccess::EnableHDMATransfers(uint8_t channelMask) {
for (int i = 0; i < 8; ++i) {
if ((channelMask & (1 << i)) != 0) {
Channel& ch = channels[i];
@@ -70,6 +72,7 @@ void DMA::EnableHDMATransfers(uint8_t channelMask) {
HDMAEN = channelMask; // Set the HDMAEN register to the channel mask
}
} // namespace memory
} // namespace emu
} // namespace app
} // namespace yaze

8
src/app/emu/memory/dma.h
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@@ -6,11 +6,11 @@
namespace yaze {
namespace app {
namespace emu {
namespace memory {
// Direct Memory Address
class DMA {
class DirectMemoryAccess {
public:
DMA() {
DirectMemoryAccess() {
// Initialize DMA and HDMA channels
for (int i = 0; i < 8; ++i) {
channels[i].DMAPn = 0;
@@ -52,6 +52,8 @@ class DMA {
uint8_t MDMAEN = 0; // Start DMA transfer
uint8_t HDMAEN = 0; // Enable HDMA transfers
};
} // namespace memory
} // namespace emu
} // namespace app
} // namespace yaze

2
src/app/emu/memory/memory.cc
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@@ -12,6 +12,7 @@
namespace yaze {
namespace app {
namespace emu {
namespace memory {
void DrawSnesMemoryMapping(const MemoryImpl& memory) {
// Using those as a base value to create width/height that are factor of the
@@ -77,6 +78,7 @@ void DrawSnesMemoryMapping(const MemoryImpl& memory) {
}
}
} // namespace memory
} // namespace emu
} // namespace app
} // namespace yaze

47
src/app/emu/memory/memory.h
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@@ -28,12 +28,13 @@
namespace yaze {
namespace app {
namespace emu {
namespace memory {
enum ROMSpeed { SLOW_ROM = 0x00, FAST_ROM = 0x07 };
enum RomSpeed { SLOW_ROM = 0x00, FAST_ROM = 0x07 };
enum BankSize { LOW_ROM = 0x00, HI_ROM = 0x01 };
enum ROMType {
enum RomType {
ROM_DEFAULT = 0x00,
ROM_RAM = 0x01,
ROM_SRAM = 0x02,
@@ -43,7 +44,7 @@ enum ROMType {
FX = 0x06
};
enum ROMSize {
enum RomSize {
SIZE_2_MBIT = 0x08,
SIZE_4_MBIT = 0x09,
SIZE_8_MBIT = 0x0A,
@@ -51,7 +52,7 @@ enum ROMSize {
SIZE_32_MBIT = 0x0C
};
enum SRAMSize {
enum SramSize {
NO_SRAM = 0x00,
SRAM_16_KBIT = 0x01,
SRAM_32_KBIT = 0x02,
@@ -73,14 +74,14 @@ enum License {
// ... and other licenses
};
class ROMInfo {
class RomInfo {
public:
std::string title;
ROMSpeed romSpeed;
RomSpeed romSpeed;
BankSize bankSize;
ROMType romType;
ROMSize romSize;
SRAMSize sramSize;
RomType romType;
RomSize romSize;
SramSize sramSize;
CountryCode countryCode;
License license;
uint8_t version;
@@ -105,7 +106,9 @@ constexpr uint32_t kVRAMSize = 0x10000;
constexpr uint32_t kOAMStart = 0x218000;
constexpr uint32_t kOAMSize = 0x220;
// memory.h
/**
* @brief Memory interface
*/
class Memory {
public:
virtual ~Memory() = default;
@@ -137,6 +140,29 @@ class Memory {
enum class MemoryMapping { SNES_LOROM = 0, PC_ADDRESS = 1 };
/**
* @class MemoryImpl
* @brief Implementation of the Memory interface for emulating memory in a SNES
* system.
*
* The MemoryImpl class provides methods for initializing and accessing memory
* in a SNES system. It implements the Memory interface and inherits from the
* Loggable class.
*
* The class supports different memory mappings, including LoROM and PC_ADDRESS
* mappings. It provides methods for reading and writing bytes, words, and longs
* from/to memory. It also supports stack operations for pushing and popping
* values.
*
* The class maintains separate vectors for ROM, RAM, VRAM, and OAM memory
* regions. It provides methods for accessing these memory regions and
* retrieving their sizes.
*
* The class also allows adding observers to be notified when memory is read or
* written.
*
* @note This class assumes a 16-bit address space.
*/
class MemoryImpl : public Memory, public Loggable {
public:
void Initialize(const std::vector<uint8_t>& romData, bool verbose = false,
@@ -396,6 +422,7 @@ class MemoryImpl : public Memory, public Loggable {
void DrawSnesMemoryMapping(const MemoryImpl& memory);
} // namespace memory
} // namespace emu
} // namespace app
} // namespace yaze

37
src/app/emu/memory/mock_memory.h
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@@ -8,10 +8,14 @@
#include "app/emu/cpu/cpu.h"
#include "app/emu/memory/memory.h"
using yaze::app::emu::Clock;
using yaze::app::emu::Cpu;
using yaze::app::emu::Memory;
namespace yaze {
namespace app {
namespace emu {
namespace memory {
/**
* @brief Mock CPU class for testing
*/
class MockClock : public Clock {
public:
MOCK_METHOD(void, UpdateClock, (double delta), (override));
@@ -21,9 +25,23 @@ class MockClock : public Clock {
MOCK_METHOD(float, GetFrequency, (), (const, override));
};
// 0x1000000 is 16 MB, simplifying the memory layout for testing
// 2 MB is = 0x200000
/**
* @class MockMemory
* @brief A mock implementation of the Memory class.
*
* This class is used for testing purposes and provides a mock implementation of
* the Memory class. It allows for reading and writing bytes, words, and longs
* to memory, as well as pushing and popping values onto and from the stack. It
* also provides methods for setting and getting the stack pointer, initializing
* memory with ROM data, and clearing memory.
*
* The mock memory is represented by a vector of uint8_t values, where each
* element represents a byte of memory. The memory can be accessed using the []
* operator, and its contents can be set using the SetMemoryContents() method.
*
* @note This class is intended for testing purposes only and should not be used
* in production code.
*/
class MockMemory : public Memory {
public:
MOCK_CONST_METHOD1(ReadByte, uint8_t(uint32_t address));
@@ -85,6 +103,8 @@ class MockMemory : public Memory {
}
}
// 16MB = 0x1000000
// 02MB = 0x200000
void Initialize(const std::vector<uint8_t>& romData) {
// 16 MB, simplifying the memory layout for testing
memory_.resize(0x1000000);
@@ -186,4 +206,9 @@ class MockMemory : public Memory {
uint16_t SP_ = 0x01FF;
};
} // namespace memory
} // namespace emu
} // namespace app
} // namespace yaze
#endif // YAZE_TEST_MOCK_MOCK_MEMORY_H

12
src/app/emu/snes.cc
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@@ -57,8 +57,8 @@ void audio_callback(void* userdata, uint8_t* stream, int len) {
} // namespace
ROMInfo SNES::ReadRomHeader(uint32_t offset) {
ROMInfo romInfo;
RomInfo SNES::ReadRomHeader(uint32_t offset) {
RomInfo romInfo;
// Read cartridge title
char title[22];
@@ -70,17 +70,17 @@ ROMInfo SNES::ReadRomHeader(uint32_t offset) {
// Read ROM speed and memory map mode
uint8_t romSpeedAndMapMode = cpu_.ReadByte(offset + 0x15);
romInfo.romSpeed = (ROMSpeed)(romSpeedAndMapMode & 0x07);
romInfo.romSpeed = (RomSpeed)(romSpeedAndMapMode & 0x07);
romInfo.bankSize = (BankSize)((romSpeedAndMapMode >> 5) & 0x01);
// Read ROM type
romInfo.romType = (ROMType)cpu_.ReadByte(offset + 0x16);
romInfo.romType = (RomType)cpu_.ReadByte(offset + 0x16);
// Read ROM size
romInfo.romSize = (ROMSize)cpu_.ReadByte(offset + 0x17);
romInfo.romSize = (RomSize)cpu_.ReadByte(offset + 0x17);
// Read RAM size
romInfo.sramSize = (SRAMSize)cpu_.ReadByte(offset + 0x18);
romInfo.sramSize = (SramSize)cpu_.ReadByte(offset + 0x18);
// Read country code
romInfo.countryCode = (CountryCode)cpu_.ReadByte(offset + 0x19);

8
src/app/emu/snes.h
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@@ -20,12 +20,14 @@ namespace yaze {
namespace app {
namespace emu {
class SNES : public DMA {
using namespace memory;
class SNES : public DirectMemoryAccess {
public:
SNES() = default;
~SNES() = default;
ROMInfo ReadRomHeader(uint32_t offset);
RomInfo ReadRomHeader(uint32_t offset);
// Initialization
void Init(ROM& rom);
@@ -95,7 +97,7 @@ class SNES : public DMA {
audio::Apu apu_{memory_, audio_ram_, clock_};
// Helper classes
ROMInfo rom_info_;
RomInfo rom_info_;
Debugger debugger;
// Currently loaded ROM

3
src/app/emu/video/ppu.h
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@@ -16,6 +16,7 @@ namespace emu {
namespace video {
using namespace PpuRegisters;
using namespace memory;
class PpuInterface {
public:
@@ -267,7 +268,7 @@ const int kPpuClockSpeed = 5369318; // 5.369318 MHz
class Ppu : public Observer, public SharedROM {
public:
// Initializes the PPU with the necessary resources and dependencies
Ppu(Memory& memory, Clock& clock) : memory_(memory), clock_(clock) {}
Ppu(memory::Memory& memory, Clock& clock) : memory_(memory), clock_(clock) {}
// Initialize the frame buffer
void Init() {

2
src/app/zelda3/dungeon/object_renderer.h
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@@ -46,7 +46,7 @@ class DungeonObjectRenderer : public SharedROM {
std::vector<uint8_t> tilemap_;
uint16_t pc_with_rts_;
std::vector<uint8_t> rom_data_;
emu::MemoryImpl memory_;
emu::memory::MemoryImpl memory_;
emu::ClockImpl clock_;
emu::Cpu cpu{memory_, clock_};
emu::video::Ppu ppu{memory_, clock_};