Added patch by Seb to fix endianness of EEPROM save files.

[virtualjaguar] / src / eeprom.cpp

diff --git a/src/eeprom.cpp b/src/eeprom.cpp
index 4258a4e661fc5d8d4b37504ad05eb388057e69a2..2fb896e44b6d229e4745ff6fa272544fcca89276 100644 (file)
--- a/src/eeprom.cpp
+++ b/src/eeprom.cpp
@@ -34,6 +34,9 @@ static void EEPROMSave(void);
 static void eeprom_set_di(uint32_t state);
 static void eeprom_set_cs(uint32_t state);
 static uint32_t eeprom_get_do(void);
+void ReadEEPROMFromFile(FILE * file, uint16_t * ram);
+void WriteEEPROMToFile(FILE * file, uint16_t * ram);
+
 
 enum { EE_STATE_START = 1, EE_STATE_OP_A, EE_STATE_OP_B, EE_STATE_0, EE_STATE_1,
        EE_STATE_2, EE_STATE_3, EE_STATE_0_0, EE_READ_ADDRESS, EE_STATE_0_0_0,
@@ -61,13 +64,13 @@ static bool haveCDROMEEPROM = false;
 void EepromInit(void)
 {
        // Handle regular cartridge EEPROM
-       sprintf(eeprom_filename, "%s%08X.eep", vjs.EEPROMPath, (unsigned int)jaguarMainROMCRC32);
+       sprintf(eeprom_filename, "%s%08X.eeprom", vjs.EEPROMPath, (unsigned int)jaguarMainROMCRC32);
        sprintf(cdromEEPROMFilename, "%scdrom.eeprom", vjs.EEPROMPath);
        FILE * fp = fopen(eeprom_filename, "rb");
 
        if (fp)
        {
-               fread(eeprom_ram, 1, 128, fp);
+               ReadEEPROMFromFile(fp, eeprom_ram);
                fclose(fp);
                WriteLog("EEPROM: Loaded from %s\n", eeprom_filename);
                haveEEPROM = true;
@@ -80,7 +83,7 @@ void EepromInit(void)
 
        if (fp)
        {
-               fread(cdromEEPROM, 1, 128, fp);
+               ReadEEPROMFromFile(fp, cdromEEPROM);
                fclose(fp);
                WriteLog("EEPROM: Loaded from cdrom.eeprom\n");
                haveCDROMEEPROM = true;
@@ -113,7 +116,7 @@ static void EEPROMSave(void)
 
        if (fp)
        {
-               fwrite(eeprom_ram, 1, 128, fp);
+               WriteEEPROMToFile(fp, eeprom_ram);
                fclose(fp);
        }
        else
@@ -124,7 +127,7 @@ static void EEPROMSave(void)
 
        if (fp)
        {
-               fwrite(cdromEEPROM, 1, 128, fp);
+               WriteEEPROMToFile(fp, cdromEEPROM);
                fclose(fp);
        }
        else
@@ -132,6 +135,33 @@ static void EEPROMSave(void)
 }
 
 
+//
+// Read/write EEPROM files to disk in an endian safe manner
+//
+void ReadEEPROMFromFile(FILE * file, uint16_t * ram)
+{
+       uint8_t buffer[128];
+       fread(buffer, 1, 128, file);
+
+       for(int i=0; i<64; i++)
+               ram[i] = (buffer[(i * 2) + 0] << 8) | buffer[(i * 2) + 1];
+}
+
+
+void WriteEEPROMToFile(FILE * file, uint16_t * ram)
+{
+       uint8_t buffer[128];
+
+       for(int i=0; i<64; i++)
+       {
+               buffer[(i * 2) + 0] = ram[i] >> 8;
+               buffer[(i * 2) + 1] = ram[i] & 0xFF;
+       }
+
+       fwrite(buffer, 1, 128, file);
+}
+
+
 uint8_t EepromReadByte(uint32_t offset)
 {
        switch (offset)
@@ -406,11 +436,7 @@ static uint32_t eeprom_get_do(void)
                break;
        case EE_STATE_2_0:
                jerry_ee_data_cnt--;
-#if 0
-               data = (eeprom_ram[jerry_ee_address_data] & (1 << jerry_ee_data_cnt)) >> jerry_ee_data_cnt;
-#else
                data = (eeprom_ram[jerry_ee_address_data] >> jerry_ee_data_cnt) & 0x01;
-#endif
 
                if (!jerry_ee_data_cnt)
                {