2019-12-08 18:46:51 +00:00
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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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2019-12-09 09:53:45 +00:00
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enum SaveType {
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S_NULL,
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S_EEPROM4K,
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S_EEPROM64K,
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S_SRAM256K,
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S_FLASH512K,
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S_FLASH1M
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};
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2019-12-10 14:57:10 +00:00
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// from DeSmuME
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2019-12-09 09:53:45 +00:00
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struct FlashProperties
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{
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u8 state;
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u8 cmd;
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u8 device;
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u8 manufacturer;
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u8 bank;
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};
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2019-12-08 18:46:51 +00:00
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u8* SRAM;
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2019-12-09 12:06:39 +00:00
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FILE* SRAMFile;
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2019-12-08 18:46:51 +00:00
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u32 SRAMLength;
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2019-12-09 09:53:45 +00:00
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SaveType SRAMType;
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2019-12-10 21:36:00 +00:00
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FlashProperties SRAMFlashState;
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2019-12-08 18:46:51 +00:00
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char SRAMPath[1024];
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2019-12-09 09:53:45 +00:00
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void (*WriteFunc)(u32 addr, u8 val);
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void Write_Null(u32 addr, u8 val);
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void Write_EEPROM(u32 addr, u8 val);
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void Write_SRAM(u32 addr, u8 val);
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void Write_Flash(u32 addr, u8 val);
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2019-12-08 18:46:51 +00:00
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bool Init()
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{
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SRAM = NULL;
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2019-12-09 12:06:39 +00:00
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SRAMFile = NULL;
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2019-12-08 18:46:51 +00:00
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return true;
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}
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void DeInit()
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{
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2019-12-09 12:06:39 +00:00
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if (SRAMFile) fclose(SRAMFile);
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2019-12-08 18:46:51 +00:00
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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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2019-12-09 12:06:39 +00:00
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if (SRAMFile) fclose(SRAMFile);
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2019-12-08 18:46:51 +00:00
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if (SRAM) delete[] SRAM;
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2019-12-09 12:06:39 +00:00
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2019-12-08 18:46:51 +00:00
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SRAM = NULL;
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2019-12-09 12:06:39 +00:00
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SRAMFile = NULL;
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2019-12-09 09:53:45 +00:00
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SRAMLength = 0;
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SRAMType = S_NULL;
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2019-12-10 21:36:00 +00:00
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SRAMFlashState = {};
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2019-12-08 18:46:51 +00:00
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}
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void DoSavestate(Savestate* file)
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{
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2019-12-19 05:12:36 +00:00
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file->Section("GBCS"); // Game Boy [Advance] Cart Save
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// logic mostly copied from NDSCart_SRAM
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u32 oldlen = SRAMLength;
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file->Var32(&SRAMLength);
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2019-12-22 16:45:11 +00:00
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2019-12-19 05:12:36 +00:00
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if (SRAMLength != oldlen)
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{
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2019-12-22 16:45:11 +00:00
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// reallocate save memory
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2019-12-19 05:12:36 +00:00
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if (oldlen) delete[] SRAM;
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if (SRAMLength) SRAM = new u8[SRAMLength];
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}
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if (SRAMLength)
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{
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2019-12-22 16:45:11 +00:00
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// fill save memory if data is present
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2019-12-19 05:12:36 +00:00
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file->VarArray(SRAM, SRAMLength);
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}
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2019-12-22 16:45:11 +00:00
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else
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{
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2019-12-22 18:58:27 +00:00
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// no save data, clear the current state
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2019-12-22 16:45:11 +00:00
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SRAMType = SaveType::S_NULL;
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2019-12-22 18:58:27 +00:00
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if (SRAMFile) fclose(SRAMFile);
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SRAM = NULL;
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SRAMFile = NULL;
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2019-12-22 16:45:11 +00:00
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return;
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}
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2019-12-19 05:12:36 +00:00
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// persist some extra state info
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file->Var8(&SRAMFlashState.bank);
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file->Var8(&SRAMFlashState.cmd);
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file->Var8(&SRAMFlashState.device);
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file->Var8(&SRAMFlashState.manufacturer);
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file->Var8(&SRAMFlashState.state);
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file->Var8((u8*)&SRAMType);
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2019-12-08 18:46:51 +00:00
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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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2019-12-09 09:53:45 +00:00
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SRAMLength = 0;
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2019-12-08 18:46:51 +00:00
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2019-12-09 12:06:39 +00:00
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FILE* f = Platform::OpenFile(SRAMPath, "r+b");
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2019-12-08 18:46:51 +00:00
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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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2019-12-09 12:06:39 +00:00
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SRAMFile = f;
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2019-12-08 18:46:51 +00:00
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}
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2019-12-09 09:53:45 +00:00
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switch (SRAMLength)
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2019-12-08 18:46:51 +00:00
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{
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2019-12-09 09:53:45 +00:00
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case 512:
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SRAMType = S_EEPROM4K;
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WriteFunc = Write_EEPROM;
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break;
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case 8192:
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SRAMType = S_EEPROM64K;
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WriteFunc = Write_EEPROM;
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break;
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case 32768:
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SRAMType = S_SRAM256K;
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WriteFunc = Write_SRAM;
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break;
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case 65536:
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SRAMType = S_FLASH512K;
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WriteFunc = Write_Flash;
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break;
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case 128*1024:
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SRAMType = S_FLASH1M;
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WriteFunc = Write_Flash;
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break;
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default:
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printf("!! BAD SAVE LENGTH %d\n", SRAMLength);
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case 0:
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SRAMType = S_NULL;
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WriteFunc = Write_Null;
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break;
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}
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2019-12-08 18:46:51 +00:00
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2019-12-09 09:53:45 +00:00
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if (SRAMType == S_FLASH512K)
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{
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// Panasonic 64K chip
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2019-12-10 21:36:00 +00:00
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SRAMFlashState.device = 0x1B;
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SRAMFlashState.manufacturer = 0x32;
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2019-12-09 09:53:45 +00:00
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}
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else if (SRAMType == S_FLASH1M)
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{
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2019-12-09 11:09:30 +00:00
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// Sanyo 128K chip
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2019-12-10 21:36:00 +00:00
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SRAMFlashState.device = 0x13;
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SRAMFlashState.manufacturer = 0x62;
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2019-12-08 18:46:51 +00:00
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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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2019-12-09 12:06:39 +00:00
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FILE *f = Platform::OpenFile(path, "r+b");
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2019-12-08 18:46:51 +00:00
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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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2019-12-09 12:06:39 +00:00
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SRAMFile = f;
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fwrite(SRAM, SRAMLength, 1, SRAMFile);
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2019-12-08 18:46:51 +00:00
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}
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2019-12-10 14:57:10 +00:00
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// mostly ported from DeSmuME
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2019-12-09 09:53:45 +00:00
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u8 Read_Flash(u32 addr)
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{
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2019-12-10 21:36:00 +00:00
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if (SRAMFlashState.cmd == 0) // no cmd
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2019-12-09 11:09:30 +00:00
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{
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2019-12-10 21:36:00 +00:00
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return *(u8*)&SRAM[addr + 0x10000 * SRAMFlashState.bank];
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2019-12-09 11:09:30 +00:00
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}
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2019-12-10 21:36:00 +00:00
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switch (SRAMFlashState.cmd)
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2019-12-09 11:09:30 +00:00
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{
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case 0x90: // chip ID
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2019-12-10 21:36:00 +00:00
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if (addr == 0x0000) return SRAMFlashState.manufacturer;
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if (addr == 0x0001) return SRAMFlashState.device;
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2019-12-09 11:09:30 +00:00
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break;
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case 0xF0: // terminate command (TODO: break if non-Macronix chip and not at the end of an ID call?)
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2019-12-10 21:36:00 +00:00
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SRAMFlashState.state = 0;
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SRAMFlashState.cmd = 0;
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2019-12-09 11:09:30 +00:00
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break;
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2019-12-10 14:57:10 +00:00
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case 0xA0: // write command
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break; // ignore here, handled in Write_Flash()
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2019-12-09 11:09:30 +00:00
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case 0xB0: // bank switching (128K only)
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2019-12-10 14:57:10 +00:00
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break; // ignore here, handled in Write_Flash()
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2019-12-09 11:09:30 +00:00
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default:
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2019-12-10 21:36:00 +00:00
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printf("GBACart_SRAM::Read_Flash: unknown command 0x%02X @ 0x%04X\n", SRAMFlashState.cmd, addr);
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2019-12-09 11:09:30 +00:00
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break;
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}
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2019-12-09 09:53:45 +00:00
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return 0xFF;
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}
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void Write_Null(u32 addr, u8 val) {}
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void Write_EEPROM(u32 addr, u8 val)
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{
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// TODO: could be used in homebrew?
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}
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2019-12-10 14:57:10 +00:00
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// mostly ported from DeSmuME
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2019-12-09 09:53:45 +00:00
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void Write_Flash(u32 addr, u8 val)
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{
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2019-12-10 21:36:00 +00:00
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switch (SRAMFlashState.state)
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2019-12-09 11:10:26 +00:00
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{
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case 0x00:
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if (addr == 0x5555)
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{
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if (val == 0xF0)
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{
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// reset
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2019-12-10 21:36:00 +00:00
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SRAMFlashState.state = 0;
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SRAMFlashState.cmd = 0;
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2019-12-09 11:10:26 +00:00
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return;
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}
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else if (val == 0xAA)
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{
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2019-12-10 21:36:00 +00:00
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SRAMFlashState.state = 1;
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2019-12-09 11:10:26 +00:00
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return;
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}
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}
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if (addr == 0x0000)
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{
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2019-12-10 21:36:00 +00:00
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if (SRAMFlashState.cmd == 0xB0)
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2019-12-09 11:10:26 +00:00
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{
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// bank switching
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2019-12-10 21:36:00 +00:00
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SRAMFlashState.bank = val;
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SRAMFlashState.cmd = 0;
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2019-12-09 11:10:26 +00:00
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return;
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}
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}
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break;
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case 0x01:
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if (addr == 0x2AAA && val == 0x55)
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{
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2019-12-10 21:36:00 +00:00
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SRAMFlashState.state = 2;
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2019-12-09 11:10:26 +00:00
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return;
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}
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2019-12-10 21:36:00 +00:00
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SRAMFlashState.state = 0;
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2019-12-09 11:10:26 +00:00
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break;
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case 0x02:
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if (addr == 0x5555)
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{
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// send command
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switch (val)
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{
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case 0x80: // erase
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2019-12-10 21:36:00 +00:00
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SRAMFlashState.state = 0x80;
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2019-12-09 11:10:26 +00:00
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break;
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case 0x90: // chip ID
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2019-12-10 21:36:00 +00:00
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SRAMFlashState.state = 0x90;
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2019-12-09 11:10:26 +00:00
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break;
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case 0xA0: // write
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2019-12-10 21:36:00 +00:00
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SRAMFlashState.state = 0;
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2019-12-09 11:10:26 +00:00
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break;
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default:
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2019-12-10 21:36:00 +00:00
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SRAMFlashState.state = 0;
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2019-12-09 11:10:26 +00:00
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break;
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}
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2019-12-10 21:36:00 +00:00
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SRAMFlashState.cmd = val;
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2019-12-09 11:10:26 +00:00
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return;
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}
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2019-12-10 21:36:00 +00:00
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SRAMFlashState.state = 0;
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2019-12-09 11:10:26 +00:00
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break;
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// erase
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case 0x80:
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if (addr == 0x5555 && val == 0xAA)
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{
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2019-12-10 21:36:00 +00:00
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SRAMFlashState.state = 0x81;
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2019-12-09 11:10:26 +00:00
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return;
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}
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2019-12-10 21:36:00 +00:00
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SRAMFlashState.state = 0;
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2019-12-09 11:10:26 +00:00
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break;
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|
|
case 0x81:
|
|
|
|
if (addr == 0x2AAA && val == 0x55)
|
|
|
|
{
|
2019-12-10 21:36:00 +00:00
|
|
|
SRAMFlashState.state = 0x82;
|
2019-12-09 11:10:26 +00:00
|
|
|
return;
|
|
|
|
}
|
2019-12-10 21:36:00 +00:00
|
|
|
SRAMFlashState.state = 0;
|
2019-12-09 11:10:26 +00:00
|
|
|
break;
|
|
|
|
case 0x82:
|
|
|
|
if (val == 0x30)
|
|
|
|
{
|
2019-12-10 21:36:00 +00:00
|
|
|
u32 start_addr = addr + 0x10000 * SRAMFlashState.bank;
|
2019-12-09 11:10:26 +00:00
|
|
|
memset((u8*)&SRAM[start_addr], 0xFF, 0x1000);
|
|
|
|
|
2019-12-09 12:06:39 +00:00
|
|
|
if (SRAMFile)
|
2019-12-09 11:10:26 +00:00
|
|
|
{
|
2019-12-09 12:06:39 +00:00
|
|
|
fseek(SRAMFile, start_addr, SEEK_SET);
|
|
|
|
fwrite((u8*)&SRAM[start_addr], 1, 0x1000, SRAMFile);
|
2019-12-09 11:10:26 +00:00
|
|
|
}
|
|
|
|
}
|
2019-12-10 21:36:00 +00:00
|
|
|
SRAMFlashState.state = 0;
|
|
|
|
SRAMFlashState.cmd = 0;
|
2019-12-09 11:10:26 +00:00
|
|
|
return;
|
|
|
|
// chip ID
|
|
|
|
case 0x90:
|
|
|
|
if (addr == 0x5555 && val == 0xAA)
|
|
|
|
{
|
2019-12-10 21:36:00 +00:00
|
|
|
SRAMFlashState.state = 0x91;
|
2019-12-09 11:10:26 +00:00
|
|
|
return;
|
|
|
|
}
|
2019-12-10 21:36:00 +00:00
|
|
|
SRAMFlashState.state = 0;
|
2019-12-09 11:10:26 +00:00
|
|
|
break;
|
|
|
|
case 0x91:
|
|
|
|
if (addr == 0x2AAA && val == 0x55)
|
|
|
|
{
|
2019-12-10 21:36:00 +00:00
|
|
|
SRAMFlashState.state = 0x92;
|
2019-12-09 11:10:26 +00:00
|
|
|
return;
|
|
|
|
}
|
2019-12-10 21:36:00 +00:00
|
|
|
SRAMFlashState.state = 0;
|
2019-12-09 11:10:26 +00:00
|
|
|
break;
|
|
|
|
case 0x92:
|
2019-12-10 21:36:00 +00:00
|
|
|
SRAMFlashState.state = 0;
|
|
|
|
SRAMFlashState.cmd = 0;
|
2019-12-09 11:10:26 +00:00
|
|
|
return;
|
|
|
|
default:
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
2019-12-10 21:36:00 +00:00
|
|
|
if (SRAMFlashState.cmd == 0xA0) // write
|
2019-12-09 11:10:26 +00:00
|
|
|
{
|
2019-12-10 21:36:00 +00:00
|
|
|
Write_SRAM(addr + 0x10000 * SRAMFlashState.bank, val);
|
|
|
|
SRAMFlashState.state = 0;
|
|
|
|
SRAMFlashState.cmd = 0;
|
2019-12-09 11:10:26 +00:00
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
printf("GBACart_SRAM::Write_Flash: unknown write 0x%02X @ 0x%04X (state: 0x%02X)\n",
|
2019-12-10 21:36:00 +00:00
|
|
|
val, addr, SRAMFlashState.state);
|
2019-12-09 09:53:45 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
void Write_SRAM(u32 addr, u8 val)
|
|
|
|
{
|
2019-12-09 12:06:39 +00:00
|
|
|
u8 prev = *(u8*)&SRAM[addr];
|
2019-12-09 09:53:45 +00:00
|
|
|
|
2019-12-09 12:06:39 +00:00
|
|
|
if (prev != val)
|
2019-12-09 09:53:45 +00:00
|
|
|
{
|
2019-12-09 12:06:39 +00:00
|
|
|
*(u8*)&SRAM[addr] = val;
|
|
|
|
|
|
|
|
if (SRAMFile)
|
|
|
|
{
|
|
|
|
fseek(SRAMFile, addr, SEEK_SET);
|
|
|
|
fwrite((u8*)&SRAM[addr], 1, 1, SRAMFile);
|
|
|
|
}
|
2019-12-09 09:53:45 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
u8 Read8(u32 addr)
|
|
|
|
{
|
|
|
|
if (SRAMType == S_NULL)
|
|
|
|
{
|
|
|
|
return 0xFF;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (SRAMType == S_FLASH512K || SRAMType == S_FLASH1M)
|
|
|
|
{
|
|
|
|
return Read_Flash(addr);
|
|
|
|
}
|
|
|
|
|
|
|
|
return *(u8*)&SRAM[addr];
|
|
|
|
}
|
|
|
|
|
|
|
|
u16 Read16(u32 addr)
|
|
|
|
{
|
|
|
|
if (SRAMType == S_NULL)
|
|
|
|
{
|
|
|
|
return 0xFFFF;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (SRAMType == S_FLASH512K || SRAMType == S_FLASH1M)
|
|
|
|
{
|
2019-12-09 12:06:39 +00:00
|
|
|
u16 val = Read_Flash(addr + 0) |
|
|
|
|
(Read_Flash(addr + 1) << 8);
|
|
|
|
return val;
|
2019-12-09 09:53:45 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
return *(u16*)&SRAM[addr];
|
|
|
|
}
|
|
|
|
|
|
|
|
u32 Read32(u32 addr)
|
|
|
|
{
|
|
|
|
if (SRAMType == S_NULL)
|
|
|
|
{
|
|
|
|
return 0xFFFFFFFF;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (SRAMType == S_FLASH512K || SRAMType == S_FLASH1M)
|
|
|
|
{
|
2019-12-09 12:06:39 +00:00
|
|
|
u32 val = Read_Flash(addr + 0) |
|
|
|
|
(Read_Flash(addr + 1) << 8) |
|
|
|
|
(Read_Flash(addr + 2) << 16) |
|
2019-12-09 09:53:45 +00:00
|
|
|
(Read_Flash(addr + 3) << 24);
|
2019-12-09 12:06:39 +00:00
|
|
|
return val;
|
2019-12-09 09:53:45 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
return *(u32*)&SRAM[addr];
|
|
|
|
}
|
|
|
|
|
2019-12-08 22:56:22 +00:00
|
|
|
void Write8(u32 addr, u8 val)
|
|
|
|
{
|
|
|
|
u8 prev = *(u8*)&SRAM[addr];
|
|
|
|
|
2019-12-09 12:06:39 +00:00
|
|
|
WriteFunc(addr, val);
|
2019-12-08 22:56:22 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
void Write16(u32 addr, u16 val)
|
|
|
|
{
|
|
|
|
u16 prev = *(u16*)&SRAM[addr];
|
|
|
|
|
2019-12-09 12:06:39 +00:00
|
|
|
WriteFunc(addr + 0, val & 0xFF);
|
|
|
|
WriteFunc(addr + 1, val >> 8 & 0xFF);
|
2019-12-08 22:56:22 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
void Write32(u32 addr, u32 val)
|
|
|
|
{
|
|
|
|
u32 prev = *(u32*)&SRAM[addr];
|
|
|
|
|
2019-12-09 12:06:39 +00:00
|
|
|
WriteFunc(addr + 0, val & 0xFF);
|
|
|
|
WriteFunc(addr + 1, val >> 8 & 0xFF);
|
|
|
|
WriteFunc(addr + 2, val >> 16 & 0xFF);
|
|
|
|
WriteFunc(addr + 3, val >> 24 & 0xFF);
|
2019-12-08 22:56:22 +00:00
|
|
|
}
|
|
|
|
|
2019-12-08 18:46:51 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
namespace GBACart
|
|
|
|
{
|
|
|
|
|
2019-12-10 21:36:38 +00:00
|
|
|
const char SOLAR_SENSOR_GAMECODES[10][5] =
|
|
|
|
{
|
|
|
|
"U3IJ", // Bokura no Taiyou - Taiyou Action RPG (Japan)
|
|
|
|
"U3IE", // Boktai - The Sun Is in Your Hand (USA)
|
|
|
|
"U3IP", // Boktai - The Sun Is in Your Hand (Europe)
|
|
|
|
"U32J", // Zoku Bokura no Taiyou - Taiyou Shounen Django (Japan)
|
|
|
|
"U32E", // Boktai 2 - Solar Boy Django (USA)
|
|
|
|
"U32P", // Boktai 2 - Solar Boy Django (Europe)
|
|
|
|
"U33J", // Shin Bokura no Taiyou - Gyakushuu no Sabata (Japan)
|
|
|
|
"A3IJ" // Boktai - The Sun Is in Your Hand (USA) (Sample)
|
|
|
|
};
|
|
|
|
|
|
|
|
|
2019-12-08 18:46:51 +00:00
|
|
|
bool CartInserted;
|
2019-12-10 22:54:34 +00:00
|
|
|
bool HasSolarSensor;
|
2019-12-08 18:46:51 +00:00
|
|
|
u8* CartROM;
|
|
|
|
u32 CartROMSize;
|
|
|
|
u32 CartCRC;
|
|
|
|
u32 CartID;
|
2019-12-10 21:36:38 +00:00
|
|
|
GPIO CartGPIO; // overridden GPIO parameters
|
2019-12-08 18:46:51 +00:00
|
|
|
|
|
|
|
|
|
|
|
bool Init()
|
|
|
|
{
|
|
|
|
if (!GBACart_SRAM::Init()) return false;
|
|
|
|
|
|
|
|
CartROM = NULL;
|
|
|
|
|
|
|
|
return true;
|
|
|
|
}
|
|
|
|
|
|
|
|
void DeInit()
|
|
|
|
{
|
|
|
|
if (CartROM) delete[] CartROM;
|
|
|
|
|
|
|
|
GBACart_SRAM::DeInit();
|
|
|
|
}
|
|
|
|
|
|
|
|
void Reset()
|
|
|
|
{
|
|
|
|
CartInserted = false;
|
2019-12-10 22:54:34 +00:00
|
|
|
HasSolarSensor = false;
|
2019-12-08 18:46:51 +00:00
|
|
|
if (CartROM) delete[] CartROM;
|
|
|
|
CartROM = NULL;
|
|
|
|
CartROMSize = 0;
|
2019-12-10 21:36:38 +00:00
|
|
|
CartGPIO = {};
|
2019-12-08 18:46:51 +00:00
|
|
|
|
|
|
|
GBACart_SRAM::Reset();
|
2019-12-10 22:43:25 +00:00
|
|
|
GBACart_SolarSensor::Reset();
|
2019-12-08 18:46:51 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
void DoSavestate(Savestate* file)
|
|
|
|
{
|
2019-12-19 05:12:36 +00:00
|
|
|
file->Section("GBAC"); // Game Boy Advance Cartridge
|
|
|
|
|
|
|
|
// logic mostly copied from NDSCart
|
|
|
|
|
|
|
|
// first we need to reload the cart itself,
|
|
|
|
// since unlike with DS, it's not loaded in advance
|
|
|
|
|
|
|
|
file->Var32(&CartROMSize);
|
|
|
|
if (!CartROMSize) return; // no GBA cartridge state? nothing to do here.
|
|
|
|
|
2019-12-22 18:58:27 +00:00
|
|
|
u32 oldCRC = CartCRC;
|
|
|
|
file->Var32(&CartCRC);
|
|
|
|
if (CartCRC != oldCRC)
|
2019-12-19 05:12:36 +00:00
|
|
|
{
|
2019-12-22 18:58:27 +00:00
|
|
|
// delete and reallocate ROM so that it is zero-padded to its full length
|
|
|
|
if (CartROM) delete[] CartROM;
|
2019-12-19 05:12:36 +00:00
|
|
|
CartROM = new u8[CartROMSize];
|
|
|
|
|
2019-12-22 18:58:27 +00:00
|
|
|
// clear the SRAM file handle; writes will not be committed
|
|
|
|
if (GBACart_SRAM::SRAMFile)
|
|
|
|
{
|
|
|
|
fclose(GBACart_SRAM::SRAMFile);
|
|
|
|
GBACart_SRAM::SRAMFile = NULL;
|
|
|
|
}
|
|
|
|
}
|
2019-12-19 05:12:36 +00:00
|
|
|
|
2019-12-22 18:58:27 +00:00
|
|
|
// only save/load the cartridge header
|
|
|
|
//
|
|
|
|
// GBA connectivity on DS mainly involves identifying the title currently
|
|
|
|
// inserted, reading save data, and issuing commands intercepted here
|
|
|
|
// (e.g. solar sensor signals). we don't know of any case where GBA ROM is
|
|
|
|
// read directly from DS software. therefore, it is more practical, both
|
|
|
|
// from the development and user experience perspectives, to avoid dealing
|
|
|
|
// with file dependencies, and store a small portion of ROM data that should
|
|
|
|
// satisfy the needs of all known software that reads from the GBA slot.
|
|
|
|
//
|
|
|
|
// note: in case of a state load, only the cartridge header is restored, but
|
|
|
|
// the rest of the ROM data is only cleared (zero-initialized) if the CRC
|
|
|
|
// differs. Therefore, loading the GBA cartridge associated with the save state
|
|
|
|
// in advance will maintain access to the full ROM contents.
|
|
|
|
file->VarArray(CartROM, 192);
|
2019-12-19 05:12:36 +00:00
|
|
|
|
|
|
|
CartInserted = true; // known, because CartROMSize > 0
|
|
|
|
file->Var32(&CartCRC);
|
|
|
|
file->Var32(&CartID);
|
|
|
|
|
|
|
|
file->Var8((u8*)&HasSolarSensor);
|
|
|
|
|
|
|
|
file->Var16(&CartGPIO.control);
|
|
|
|
file->Var16(&CartGPIO.data);
|
|
|
|
file->Var16(&CartGPIO.direction);
|
|
|
|
|
|
|
|
// now do the rest
|
|
|
|
|
2019-12-11 01:28:40 +00:00
|
|
|
GBACart_SRAM::DoSavestate(file);
|
2019-12-19 05:12:36 +00:00
|
|
|
if (HasSolarSensor) GBACart_SolarSensor::DoSavestate(file);
|
2019-12-08 18:46:51 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
bool LoadROM(const char* path, const char* sram)
|
|
|
|
{
|
|
|
|
FILE* f = Platform::OpenFile(path, "rb");
|
|
|
|
if (!f)
|
|
|
|
{
|
|
|
|
return false;
|
|
|
|
}
|
|
|
|
|
2019-12-08 22:13:56 +00:00
|
|
|
if (CartInserted)
|
|
|
|
{
|
|
|
|
Reset();
|
|
|
|
}
|
|
|
|
|
2019-12-08 18:46:51 +00:00
|
|
|
fseek(f, 0, SEEK_END);
|
|
|
|
u32 len = (u32)ftell(f);
|
|
|
|
|
|
|
|
CartROMSize = 0x200;
|
|
|
|
while (CartROMSize < len)
|
|
|
|
CartROMSize <<= 1;
|
|
|
|
|
2019-12-10 21:36:38 +00:00
|
|
|
char gamecode[5] = { '\0' };
|
2019-12-08 18:46:51 +00:00
|
|
|
fseek(f, 0xAC, SEEK_SET);
|
2019-12-10 21:36:38 +00:00
|
|
|
fread(&gamecode, 1, 4, f);
|
|
|
|
printf("Game code: %s\n", gamecode);
|
|
|
|
|
|
|
|
for (int i = 0; i < sizeof(SOLAR_SENSOR_GAMECODES)/sizeof(SOLAR_SENSOR_GAMECODES[0]); i++)
|
|
|
|
{
|
2019-12-10 22:54:34 +00:00
|
|
|
if (strcmp(gamecode, SOLAR_SENSOR_GAMECODES[i]) == 0) HasSolarSensor = true;
|
2019-12-10 21:36:38 +00:00
|
|
|
}
|
|
|
|
|
2019-12-10 22:54:34 +00:00
|
|
|
if (HasSolarSensor)
|
2019-12-10 21:36:38 +00:00
|
|
|
{
|
|
|
|
printf("GBA solar sensor support detected!\n");
|
|
|
|
}
|
2019-12-08 18:46:51 +00:00
|
|
|
|
|
|
|
CartROM = new u8[CartROMSize];
|
|
|
|
memset(CartROM, 0, CartROMSize);
|
|
|
|
fseek(f, 0, SEEK_SET);
|
|
|
|
fread(CartROM, 1, len, f);
|
|
|
|
|
|
|
|
fclose(f);
|
|
|
|
|
|
|
|
CartCRC = CRC32(CartROM, CartROMSize);
|
|
|
|
printf("ROM CRC32: %08X\n", CartCRC);
|
|
|
|
|
|
|
|
CartInserted = true;
|
|
|
|
|
|
|
|
// save
|
|
|
|
printf("Save file: %s\n", sram);
|
|
|
|
GBACart_SRAM::LoadSave(sram);
|
|
|
|
|
|
|
|
return true;
|
|
|
|
}
|
|
|
|
|
|
|
|
void RelocateSave(const char* path, bool write)
|
|
|
|
{
|
|
|
|
// derp herp
|
|
|
|
GBACart_SRAM::RelocateSave(path, write);
|
|
|
|
}
|
|
|
|
|
2019-12-10 21:36:38 +00:00
|
|
|
// referenced from mGBA
|
|
|
|
void WriteGPIO(u32 addr, u16 val)
|
|
|
|
{
|
|
|
|
switch (addr)
|
|
|
|
{
|
|
|
|
case 0xC4:
|
|
|
|
CartGPIO.data &= ~CartGPIO.direction;
|
|
|
|
CartGPIO.data |= val & CartGPIO.direction;
|
2019-12-10 22:54:34 +00:00
|
|
|
if (HasSolarSensor) GBACart_SolarSensor::Process(&CartGPIO);
|
2019-12-10 21:36:38 +00:00
|
|
|
break;
|
|
|
|
case 0xC6:
|
|
|
|
CartGPIO.direction = val;
|
|
|
|
break;
|
|
|
|
case 0xC8:
|
|
|
|
CartGPIO.control = val;
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
printf("Unknown GBA GPIO write 0x%02X @ 0x%04X\n", val, addr);
|
|
|
|
}
|
|
|
|
|
|
|
|
// write the GPIO values in the ROM (if writable)
|
|
|
|
if (CartGPIO.control & 1)
|
|
|
|
{
|
2019-12-10 22:43:25 +00:00
|
|
|
*(u16*)&CartROM[0xC4] = CartGPIO.data;
|
|
|
|
*(u16*)&CartROM[0xC6] = CartGPIO.direction;
|
|
|
|
*(u16*)&CartROM[0xC8] = CartGPIO.control;
|
2019-12-10 21:36:38 +00:00
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
|
|
|
// GBATEK: "in write-only mode, reads return 00h (or [possibly] other data (...))"
|
|
|
|
// ambiguous, but mGBA sets ROM to 00h when switching to write-only, so do the same
|
2019-12-10 22:43:25 +00:00
|
|
|
*(u16*)&CartROM[0xC4] = 0;
|
|
|
|
*(u16*)&CartROM[0xC6] = 0;
|
|
|
|
*(u16*)&CartROM[0xC8] = 0;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
namespace GBACart_SolarSensor
|
|
|
|
{
|
|
|
|
|
|
|
|
bool LightEdge;
|
|
|
|
u8 LightCounter;
|
|
|
|
u8 LightSample;
|
|
|
|
u8 LightLevel; // 0-10 range
|
|
|
|
|
|
|
|
// levels from mGBA
|
|
|
|
const int GBA_LUX_LEVELS[11] = { 0, 5, 11, 18, 27, 42, 62, 84, 109, 139, 183 };
|
|
|
|
#define LIGHT_VALUE (0xFF - (0x16 + GBA_LUX_LEVELS[LightLevel]))
|
|
|
|
|
|
|
|
|
|
|
|
void Reset()
|
|
|
|
{
|
|
|
|
LightEdge = false;
|
|
|
|
LightCounter = 0;
|
|
|
|
LightSample = 0xFF;
|
|
|
|
LightLevel = 0;
|
|
|
|
}
|
|
|
|
|
2019-12-11 01:28:40 +00:00
|
|
|
void DoSavestate(Savestate* file)
|
|
|
|
{
|
2019-12-19 05:12:36 +00:00
|
|
|
file->Var8((u8*)&LightEdge);
|
|
|
|
file->Var8(&LightCounter);
|
|
|
|
file->Var8(&LightSample);
|
|
|
|
file->Var8(&LightLevel);
|
2019-12-11 01:28:40 +00:00
|
|
|
}
|
|
|
|
|
2019-12-10 22:43:25 +00:00
|
|
|
void Process(GBACart::GPIO* gpio)
|
|
|
|
{
|
|
|
|
if (gpio->data & 4) return; // Boktai chip select
|
|
|
|
if (gpio->data & 2) // Reset
|
|
|
|
{
|
2019-12-10 23:44:53 +00:00
|
|
|
u8 prev = LightSample;
|
2019-12-10 22:43:25 +00:00
|
|
|
LightCounter = 0;
|
|
|
|
LightSample = LIGHT_VALUE;
|
2019-12-10 23:44:53 +00:00
|
|
|
printf("Solar sensor reset (sample: 0x%02X -> 0x%02X)\n", prev, LightSample);
|
2019-12-10 22:43:25 +00:00
|
|
|
}
|
|
|
|
if (gpio->data & 1 && LightEdge) LightCounter++;
|
|
|
|
|
|
|
|
LightEdge = !(gpio->data & 1);
|
|
|
|
|
|
|
|
bool sendBit = LightCounter >= LightSample;
|
|
|
|
if (gpio->control & 1)
|
|
|
|
{
|
|
|
|
gpio->data = (gpio->data & gpio->direction) | ((sendBit << 3) & ~gpio->direction & 0xF);
|
2019-12-10 21:36:38 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2019-12-08 18:46:51 +00:00
|
|
|
}
|