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Merge pull request #103 from negativeExponent/huc3 

HuC3: Refactoring to avoid breaking savestates
This commit is contained in:
Autechre 2021-05-25 06:36:40 +02:00 committed by GitHub
parent 5187d70e30 93084990b2
commit 6dca6fe8df
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GPG Key ID: 4AEE18F83AFDEB23
4 changed files with 62 additions and 39 deletions
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4
src/gb/GB.cpp
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@ -5515,6 +5515,8 @@ unsigned int gbWriteSaveState(uint8_t* data, unsigned)
utilWriteMem(data, &gbDataMBC5, sizeof(gbDataMBC5));
utilWriteMem(data, &gbDataHuC1, sizeof(gbDataHuC1));
utilWriteMem(data, &gbDataHuC3, sizeof(gbDataHuC3));
if (gbRomType == 0xfe) // HuC3 rtc data
utilWriteMem(data, &gbRTCHuC3, sizeof(gbRTCHuC3));
utilWriteMem(data, &gbDataTAMA5, sizeof(gbDataTAMA5));
if (gbTAMA5ram != NULL)
utilWriteMem(data, gbTAMA5ram, gbTAMA5ramSize);
@ -5632,6 +5634,8 @@ bool gbReadSaveState(const uint8_t* data, unsigned)
utilReadMem(&gbDataMBC5, data, sizeof(gbDataMBC5));
utilReadMem(&gbDataHuC1, data, sizeof(gbDataHuC1));
utilReadMem(&gbDataHuC3, data, sizeof(gbDataHuC3));
if (gbRomType == 0xfe) // HuC3 rtc data
utilReadMem(&gbRTCHuC3, data, sizeof(gbRTCHuC3));
utilReadMem(&gbDataTAMA5, data, sizeof(gbDataTAMA5));
if (gbTAMA5ram != NULL) {
utilReadMem(gbTAMA5ram, data, gbTAMA5ramSize);

61
src/gb/gbMemory.cpp
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@ -1000,31 +1000,40 @@ mapperHuC3 gbDataHuC3 = {
0, // RAM read value
0, // Register 1
0, // Register 2
0, // Register 3
0, // Register 4
0, // Register 5
0, // Register 6
0, // Register 7
0 // Register 8
};
mapperHuC3RTC gbRTCHuC3 = {
0, // lastTime
0, // DateTime
0, // WritingTime
0, // ModeFlag
0, // ClockShift
0 // lastTime
0 // ClockShift
};
void memoryupdateHuC3Latch() {
uint64_t now = time(NULL);
uint64_t diff = now - gbDataHuC3.mapperLastTime;
uint64_t diff = now - gbRTCHuC3.mapperLastTime;
if (diff > 0) {
unsigned minute = (diff / 60) % 1440;
unsigned day = (diff / 86400) & 0xFFF;
gbDataHuC3.mapperDateTime = (day << 12) | minute;
gbRTCHuC3.mapperDateTime = (day << 12) | minute;
}
}
void memoryupdateHuC3Clock() {
uint64_t now = time(NULL);
unsigned minute = (gbDataHuC3.mapperWritingTime & 0xFFF) % 1440;
unsigned day = (gbDataHuC3.mapperWritingTime & 0xFFF000) >> 12;
unsigned minute = (gbRTCHuC3.mapperWritingTime & 0xFFF) % 1440;
unsigned day = (gbRTCHuC3.mapperWritingTime & 0xFFF000) >> 12;
gbDataHuC3.mapperLastTime = now - minute * 60 - day * 86400;
gbRTCHuC3.mapperLastTime = now - minute * 60 - day * 86400;
}
// HuC3 ROM write registers
@ -1108,11 +1117,11 @@ void mapperHuC3RAM(uint16_t address, uint8_t value)
// read time
memoryupdateHuC3Latch();
if (gbDataHuC3.mapperModeFlag == HUC3_READ) {
gbDataHuC3.mapperRAMValue = (gbDataHuC3.mapperDateTime >> gbDataHuC3.mapperClockShift) & 0x0F;
gbDataHuC3.mapperClockShift += 4;
if (gbDataHuC3.mapperClockShift > 24)
gbDataHuC3.mapperClockShift = 0;
if (gbRTCHuC3.mapperModeFlag == HUC3_READ) {
gbDataHuC3.mapperRAMValue = (gbRTCHuC3.mapperDateTime >> gbRTCHuC3.mapperClockShift) & 0x0F;
gbRTCHuC3.mapperClockShift += 4;
if (gbRTCHuC3.mapperClockShift > 24)
gbRTCHuC3.mapperClockShift = 0;
}
break;
case 0x30:
@ -1123,15 +1132,15 @@ void mapperHuC3RAM(uint16_t address, uint8_t value)
gbDataHuC3.mapperAddress = (gbDataHuC3.mapperRegister6 << 24) | (gbDataHuC3.mapperRegister5 << 16) | (gbDataHuC3.mapperRegister4 << 8) | (gbDataHuC3.mapperRegister3 << 4) | (gbDataHuC3.mapperRegister2);*/
// write time
if (gbDataHuC3.mapperModeFlag == HUC3_WRITE) {
if (gbDataHuC3.mapperClockShift == 0)
gbDataHuC3.mapperWritingTime = 0;
if (gbDataHuC3.mapperClockShift <= 24) {
gbDataHuC3.mapperWritingTime |= (value & 0x0F) << gbDataHuC3.mapperClockShift;
gbDataHuC3.mapperClockShift += 4;
if (gbDataHuC3.mapperClockShift == 24) {
if (gbRTCHuC3.mapperModeFlag == HUC3_WRITE) {
if (gbRTCHuC3.mapperClockShift == 0)
gbRTCHuC3.mapperWritingTime = 0;
if (gbRTCHuC3.mapperClockShift <= 24) {
gbRTCHuC3.mapperWritingTime |= (value & 0x0F) << gbRTCHuC3.mapperClockShift;
gbRTCHuC3.mapperClockShift += 4;
if (gbRTCHuC3.mapperClockShift == 24) {
memoryupdateHuC3Clock();
gbDataHuC3.mapperModeFlag = HUC3_READ;
gbRTCHuC3.mapperModeFlag = HUC3_READ;
}
}
}
@ -1151,16 +1160,16 @@ void mapperHuC3RAM(uint16_t address, uint8_t value)
switch(value & 0x0F) {
case 0x0:
// shift reset?
gbDataHuC3.mapperClockShift = 0;
gbRTCHuC3.mapperClockShift = 0;
break;
case 0x3:
// write time?
gbDataHuC3.mapperModeFlag = HUC3_WRITE;
gbDataHuC3.mapperClockShift = 0;
gbRTCHuC3.mapperModeFlag = HUC3_WRITE;
gbRTCHuC3.mapperClockShift = 0;
break;
case 0x7:
gbDataHuC3.mapperModeFlag = HUC3_READ;
gbDataHuC3.mapperClockShift = 0;
gbRTCHuC3.mapperModeFlag = HUC3_READ;
gbRTCHuC3.mapperClockShift = 0;
break;
// others are unimplemented so far
}
@ -1169,7 +1178,7 @@ void mapperHuC3RAM(uint16_t address, uint8_t value)
//gbDataHuC3.mapperRegister1 = (gbDataHuC3.mapperRegister1 & 0x0f) | ((value << 4) & 0x0f);
break;
case 0x60:
gbDataHuC3.mapperModeFlag = HUC3_READ; // ???
gbRTCHuC3.mapperModeFlag = HUC3_READ; // ???
gbDataHuC3.mapperRAMValue = 1;
break;
default:

30
src/gb/gbMemory.h
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@ -77,12 +77,6 @@ struct mapperHuC1 {
int mapperRAMAddress;
};
enum {
HUC3_READ = 0,
HUC3_WRITE = 1,
HUC3_NONE = 2
};
struct mapperHuC3 {
int mapperRAMEnable;
int mapperROMBank;
@ -93,14 +87,29 @@ struct mapperHuC3 {
int mapperRAMValue;
int mapperRegister1;
int mapperRegister2;
int mapperDateTime;
int mapperWritingTime;
int mapperModeFlag;
int mapperClockShift;
int mapperRegister3;
int mapperRegister4;
int mapperRegister5;
int mapperRegister6;
int mapperRegister7;
int mapperRegister8;
};
enum {
HUC3_READ = 0,
HUC3_WRITE = 1,
HUC3_NONE = 2
};
struct mapperHuC3RTC {
union {
time_t mapperLastTime;
uint64_t _time_pad; /* so that 32bit and 64bit saves are compatible */
};
uint32_t mapperDateTime;
uint32_t mapperWritingTime;
uint32_t mapperModeFlag;
uint32_t mapperClockShift;
};
struct mapperTAMA5 {
@ -155,6 +164,7 @@ extern mapperMBC3 gbDataMBC3;
extern mapperMBC5 gbDataMBC5;
extern mapperHuC1 gbDataHuC1;
extern mapperHuC3 gbDataHuC3;
extern mapperHuC3RTC gbRTCHuC3;
extern mapperTAMA5 gbDataTAMA5;
extern mapperMMM01 gbDataMMM01;
extern mapperGS3 gbDataGS3;

6
src/libretro/libretro.cpp
View File

@ -173,7 +173,7 @@ static void* gb_rtcdata_prt(void)
case 0xfd: // TAMA5 + extended
return &gbDataTAMA5.mapperSeconds;
case 0xfe: // HuC3 + Clock
return &gbDataHuC3.mapperDateTime;
return &gbRTCHuC3.mapperLastTime;
}
return NULL;
}
@ -187,7 +187,7 @@ static size_t gb_rtcdata_size(void)
case 0xfd: // TAMA5 + extended
return TAMA5_RTC_DATA_SIZE;
case 0xfe: // HuC3 + Clock
return HUC3_RTC_DATA_SIZE;
return sizeof(gbRTCHuC3);
}
return 0;
}
@ -1438,7 +1438,7 @@ void retro_run(void)
initRTC = true;
break;
case 0xfe:
if (!gbDataHuC3.mapperLastTime)
if (!gbRTCHuC3.mapperLastTime)
initRTC = true;
break;
}