mirror of
https://github.com/melonDS-emu/melonDS.git
synced 2024-11-14 21:37:42 -07:00
Add GBA cart model and allow reading from it
This commit is contained in:
Raphaël Zumer
parent
f21347c918
commit
d86ee1d5bf
@ -10,6 +10,7 @@ add_library(core STATIC
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CP15.cpp
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CRC32.cpp
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DMA.cpp
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GBACart.cpp
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GPU.cpp
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GPU2D.cpp
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GPU3D.cpp
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197
src/GBACart.cpp
Normal file
197
src/GBACart.cpp
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@ -0,0 +1,197 @@
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/*
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Copyright 2019 Arisotura, Raphaël Zumer
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This file is part of melonDS.
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melonDS is free software: you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation, either version 3 of the License, or (at your option)
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any later version.
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melonDS is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with melonDS. If not, see http://www.gnu.org/licenses/.
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*/
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#include <stdio.h>
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#include <string.h>
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#include "GBACart.h"
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#include "CRC32.h"
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#include "Platform.h"
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namespace GBACart_SRAM
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{
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u8* SRAM;
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u32 SRAMLength;
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char SRAMPath[1024];
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bool Init()
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{
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SRAM = NULL;
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return true;
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}
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void DeInit()
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{
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if (SRAM) delete[] SRAM;
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}
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void Reset()
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{
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if (SRAM) delete[] SRAM;
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SRAM = NULL;
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}
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void DoSavestate(Savestate* file)
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{
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// TODO?
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}
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void LoadSave(const char* path)
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{
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if (SRAM) delete[] SRAM;
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strncpy(SRAMPath, path, 1023);
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SRAMPath[1023] = '\0';
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FILE* f = Platform::OpenFile(path, "rb");
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if (f)
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{
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fseek(f, 0, SEEK_END);
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SRAMLength = (u32)ftell(f);
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SRAM = new u8[SRAMLength];
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fseek(f, 0, SEEK_SET);
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fread(SRAM, SRAMLength, 1, f);
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fclose(f);
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}
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else
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{
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int SRAMLength = 65536; // max GBA SRAM size
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SRAM = new u8[SRAMLength];
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memset(SRAM, 0xFF, SRAMLength);
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}
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}
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void RelocateSave(const char* path, bool write)
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{
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if (!write)
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{
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LoadSave(path); // lazy
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return;
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}
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strncpy(SRAMPath, path, 1023);
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SRAMPath[1023] = '\0';
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FILE* f = Platform::OpenFile(path, "wb");
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if (!f)
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{
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printf("GBACart_SRAM::RelocateSave: failed to create new file. fuck\n");
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return;
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}
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fwrite(SRAM, SRAMLength, 1, f);
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fclose(f);
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}
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}
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namespace GBACart
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{
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bool CartInserted;
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u8* CartROM;
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u32 CartROMSize;
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u32 CartCRC;
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u32 CartID;
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bool Init()
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{
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if (!GBACart_SRAM::Init()) return false;
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CartROM = NULL;
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return true;
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}
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void DeInit()
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{
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if (CartROM) delete[] CartROM;
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GBACart_SRAM::DeInit();
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}
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void Reset()
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{
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CartInserted = false;
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if (CartROM) delete[] CartROM;
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CartROM = NULL;
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CartROMSize = 0;
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GBACart_SRAM::Reset();
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}
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void DoSavestate(Savestate* file)
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{
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// TODO?
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}
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bool LoadROM(const char* path, const char* sram)
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{
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FILE* f = Platform::OpenFile(path, "rb");
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if (!f)
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{
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return false;
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}
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fseek(f, 0, SEEK_END);
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u32 len = (u32)ftell(f);
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CartROMSize = 0x200;
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while (CartROMSize < len)
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CartROMSize <<= 1;
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u32 gamecode;
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fseek(f, 0xAC, SEEK_SET);
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fread(&gamecode, 4, 1, f);
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printf("Game code: %c%c%c%c\n", gamecode&0xFF, (gamecode>>8)&0xFF, (gamecode>>16)&0xFF, gamecode>>24);
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CartROM = new u8[CartROMSize];
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memset(CartROM, 0, CartROMSize);
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fseek(f, 0, SEEK_SET);
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fread(CartROM, 1, len, f);
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fclose(f);
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//CartROM = f;
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CartCRC = CRC32(CartROM, CartROMSize);
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printf("ROM CRC32: %08X\n", CartCRC);
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CartInserted = true;
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// save
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printf("Save file: %s\n", sram);
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GBACart_SRAM::LoadSave(sram);
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return true;
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}
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void RelocateSave(const char* path, bool write)
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{
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// derp herp
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GBACart_SRAM::RelocateSave(path, write);
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}
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}
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52
src/GBACart.h
Normal file
52
src/GBACart.h
Normal file
@ -0,0 +1,52 @@
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/*
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Copyright 2019 Arisotura, Raphaël Zumer
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This file is part of melonDS.
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melonDS is free software: you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation, either version 3 of the License, or (at your option)
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any later version.
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melonDS is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with melonDS. If not, see http://www.gnu.org/licenses/.
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*/
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#ifndef GBACART_H
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#define GBACART_H
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#include "types.h"
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#include "Savestate.h"
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namespace GBACart_SRAM
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{
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extern u8* SRAM;
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extern u32 SRAMLength;
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}
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namespace GBACart
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{
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extern bool CartInserted;
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extern u8* CartROM;
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extern u32 CartROMSize;
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bool Init();
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void DeInit();
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void Reset();
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void DoSavestate(Savestate* file);
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bool LoadROM(const char* path, const char* sram);
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void RelocateSave(const char* path, bool write);
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}
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#endif // GBACART_H
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73
src/NDS.cpp
73
src/NDS.cpp
@ -22,6 +22,7 @@
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#include "NDS.h"
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#include "ARM.h"
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#include "NDSCart.h"
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#include "GBACart.h"
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#include "DMA.h"
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#include "FIFO.h"
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#include "GPU.h"
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@ -1611,14 +1612,18 @@ u8 ARM9Read8(u32 addr)
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case 0x08000000:
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case 0x09000000:
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if (ExMemCnt[0] & (1<<7)) return 0x00; // deselected CPU is 00h-filled
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//return *(u8*)&NDSCart::CartROM[addr & (NDSCart::CartROMSize-1)];
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//printf("GBA read8 %08X\n", addr);
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// TODO!!!
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if (GBACart::CartInserted)
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{
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return *(u8*)&GBACart::CartROM[addr & (GBACart::CartROMSize-1)];
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}
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return 0xFF; // TODO: proper open bus
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case 0x0A000000:
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if (ExMemCnt[0] & (1<<7)) return 0x00; // deselected CPU is 00h-filled
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// TODO!!!
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if (GBACart::CartInserted)
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{
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return *(u8*)&GBACart_SRAM::SRAM[addr & (GBACart_SRAM::SRAMLength-1)];
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}
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return 0xFF; // TODO: proper open bus
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}
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@ -1672,14 +1677,18 @@ u16 ARM9Read16(u32 addr)
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case 0x08000000:
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case 0x09000000:
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if (ExMemCnt[0] & (1<<7)) return 0x0000; // deselected CPU is 00h-filled
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//return *(u8*)&NDSCart::CartROM[addr & (NDSCart::CartROMSize-1)];
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//printf("GBA read8 %08X\n", addr);
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// TODO!!!
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if (GBACart::CartInserted)
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{
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return *(u16*)&GBACart::CartROM[addr & (GBACart::CartROMSize-1)];
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}
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return 0xFFFF; // TODO: proper open bus
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case 0x0A000000:
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if (ExMemCnt[0] & (1<<7)) return 0x0000; // deselected CPU is 00h-filled
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// TODO!!!
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if (GBACart::CartInserted)
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{
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return *(u16*)&GBACart_SRAM::SRAM[addr & (GBACart_SRAM::SRAMLength-1)];
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}
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return 0xFFFF; // TODO: proper open bus
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}
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@ -1733,14 +1742,18 @@ u32 ARM9Read32(u32 addr)
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case 0x08000000:
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case 0x09000000:
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if (ExMemCnt[0] & (1<<7)) return 0x00000000; // deselected CPU is 00h-filled
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//return *(u8*)&NDSCart::CartROM[addr & (NDSCart::CartROMSize-1)];
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//printf("GBA read8 %08X\n", addr);
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// TODO!!!
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if (GBACart::CartInserted)
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{
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return *(u32*)&GBACart::CartROM[addr & (GBACart::CartROMSize-1)];
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}
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return 0xFFFFFFFF; // TODO: proper open bus
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case 0x0A000000:
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if (ExMemCnt[0] & (1<<7)) return 0x00000000; // deselected CPU is 00h-filled
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// TODO!!!
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if (GBACart::CartInserted)
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{
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return *(u32*)&GBACart_SRAM::SRAM[addr & (GBACart_SRAM::SRAMLength-1)];
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}
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return 0xFFFFFFFF; // TODO: proper open bus
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}
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@ -1936,14 +1949,18 @@ u8 ARM7Read8(u32 addr)
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case 0x08000000:
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case 0x09000000:
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if (!(ExMemCnt[0] & (1<<7))) return 0x00; // deselected CPU is 00h-filled
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//return *(u8*)&NDSCart::CartROM[addr & (NDSCart::CartROMSize-1)];
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//printf("GBA read8 %08X\n", addr);
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// TODO!!!
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if (GBACart::CartInserted)
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{
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return *(u8*)&GBACart::CartROM[addr & (GBACart::CartROMSize-1)];
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}
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return 0xFF; // TODO: proper open bus
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case 0x0A000000:
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if (!(ExMemCnt[0] & (1<<7))) return 0x00; // deselected CPU is 00h-filled
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// TODO!!!
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if (GBACart::CartInserted)
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{
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return *(u8*)&GBACart_SRAM::SRAM[addr & (GBACart_SRAM::SRAMLength-1)];
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}
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return 0xFF; // TODO: proper open bus
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}
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@ -1999,14 +2016,18 @@ u16 ARM7Read16(u32 addr)
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case 0x08000000:
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case 0x09000000:
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if (!(ExMemCnt[0] & (1<<7))) return 0x0000; // deselected CPU is 00h-filled
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//return *(u8*)&NDSCart::CartROM[addr & (NDSCart::CartROMSize-1)];
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//printf("GBA read8 %08X\n", addr);
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// TODO!!!
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if (GBACart::CartInserted)
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{
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return *(u16*)&GBACart::CartROM[addr & (GBACart::CartROMSize-1)];
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}
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return 0xFFFF; // TODO: proper open bus
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case 0x0A000000:
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if (!(ExMemCnt[0] & (1<<7))) return 0x0000; // deselected CPU is 00h-filled
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// TODO!!!
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if (GBACart::CartInserted)
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{
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return *(u16*)&GBACart_SRAM::SRAM[addr & (GBACart_SRAM::SRAMLength-1)];
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}
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return 0xFFFF; // TODO: proper open bus
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}
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@ -2062,14 +2083,18 @@ u32 ARM7Read32(u32 addr)
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case 0x08000000:
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case 0x09000000:
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if (!(ExMemCnt[0] & (1<<7))) return 0x00000000; // deselected CPU is 00h-filled
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//return *(u8*)&NDSCart::CartROM[addr & (NDSCart::CartROMSize-1)];
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//printf("GBA read8 %08X\n", addr);
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// TODO!!!
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if (GBACart::CartInserted)
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{
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return *(u32*)&GBACart::CartROM[addr & (GBACart::CartROMSize-1)];
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}
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return 0xFFFFFFFF; // TODO: proper open bus
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case 0x0A000000:
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if (!(ExMemCnt[0] & (1<<7))) return 0x00000000; // deselected CPU is 00h-filled
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// TODO!!!
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if (GBACart::CartInserted)
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{
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return *(u32*)&GBACart_SRAM::SRAM[addr & (GBACart_SRAM::SRAMLength-1)];
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}
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return 0xFFFFFFFF; // TODO: proper open bus
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}
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