#include "log.h"
#include "settings.h"
-#define eeprom_LOG
+//#define eeprom_LOG
static uint16_t eeprom_ram[64];
+static uint16_t cdromEEPROM[64];
//
// Private function prototypes
static uint16_t jerry_ee_data_cnt = 16;
static uint16_t jerry_writes_enabled = 0;
static uint16_t jerry_ee_direct_jump = 0;
+
static char eeprom_filename[MAX_PATH];
-static bool foundEEPROM = false;
+static char cdromEEPROMFilename[MAX_PATH];
+static bool haveEEPROM = false;
+static bool haveCDROMEEPROM = false;
+
void EepromInit(void)
{
+ // Handle regular cartridge EEPROM
sprintf(eeprom_filename, "%s%08X.eep", 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);
fclose(fp);
WriteLog("EEPROM: Loaded from %s\n", eeprom_filename);
- foundEEPROM = true;
+ haveEEPROM = true;
}
else
WriteLog("EEPROM: Could not open file \"%s\"!\n", eeprom_filename);
+
+ // Handle JagCD EEPROM
+ fp = fopen(cdromEEPROMFilename, "rb");
+
+ if (fp)
+ {
+ fread(cdromEEPROM, 1, 128, fp);
+ fclose(fp);
+ WriteLog("EEPROM: Loaded from cdrom.eeprom\n");
+ haveCDROMEEPROM = true;
+ }
+ else
+ WriteLog("EEPROM: Could not open file \"%s\"!\n", cdromEEPROMFilename);
}
+
void EepromReset(void)
{
- if (!foundEEPROM)
+ if (!haveEEPROM)
memset(eeprom_ram, 0xFF, 64 * sizeof(uint16_t));
+
+ if (!haveCDROMEEPROM)
+ memset(cdromEEPROM, 0xFF, 64 * sizeof(uint16_t));
}
+
void EepromDone(void)
{
WriteLog("EEPROM: Done.\n");
}
+
static void EEPROMSave(void)
{
+ // Write out regular cartridge EEPROM data
FILE * fp = fopen(eeprom_filename, "wb");
- if (fp == NULL)
+ if (fp)
{
- WriteLog("EEPROM: Could not create file \"%s!\"\n", eeprom_filename);
- return;
+ fwrite(eeprom_ram, 1, 128, fp);
+ fclose(fp);
}
+ else
+ WriteLog("EEPROM: Could not create file \"%s!\"\n", eeprom_filename);
+
+ // Write out JagCD EEPROM data
+ fp = fopen(cdromEEPROMFilename, "wb");
- fwrite(eeprom_ram, 1, 128, fp);
- fclose(fp);
+ if (fp)
+ {
+ fwrite(cdromEEPROM, 1, 128, fp);
+ fclose(fp);
+ }
+ else
+ WriteLog("EEPROM: Could not create file \"%s!\"\n", cdromEEPROMFilename);
}
+
uint8_t EepromReadByte(uint32_t offset)
{
switch (offset)
return 0x00;
}
+
uint16_t EepromReadWord(uint32_t offset)
{
return ((uint16_t)EepromReadByte(offset + 0) << 8) | EepromReadByte(offset + 1);
}
+
void EepromWriteByte(uint32_t offset, uint8_t data)
{
switch (offset)
}
}
+
void EepromWriteWord(uint32_t offset, uint16_t data)
{
EepromWriteByte(offset + 0, (data >> 8) & 0xFF);
EepromWriteByte(offset + 1, data & 0xFF);
}
+
+/*
+;
+; Commands specific to the National Semiconductor NM93C14
+;
+;
+; 9-bit commands..
+; 876543210
+eEWDS equ %100000000 ;Erase/Write disable (default)
+eWRAL equ %100010000 ;Writes all registers
+eERAL equ %100100000 ;Erase all registers
+eEWEN equ %100110000 ;Erase/write Enable
+eWRITE equ %101000000 ;Write selected register
+eREAD equ %110000000 ;read from EEPROM
+eERASE equ %111000000 ;Erase selected register
+*/
+
+
static void eeprom_set_di(uint32_t data)
{
// WriteLog("eeprom: di=%i\n",data);
jerry_ee_op |= data;
jerry_ee_direct_jump = 0;
// WriteLog("eeprom: opcode %i\n",jerry_ee_op);
+
switch (jerry_ee_op)
{
+ // Opcode 00: eEWEN, eERAL, eWRAL, eEWNDS
case 0: jerry_ee_state = EE_STATE_0; break;
+ // Opcode 01: eWRITE (Write selected register)
case 1: jerry_ee_state = EE_STATE_1; break;
+ // Opcode 10: eREAD (Read from EEPROM)
case 2: jerry_ee_state = EE_STATE_2; break;
+ // Opcode 11: eERASE (Erase selected register)
case 3: jerry_ee_state = EE_STATE_3; break;
}
+
eeprom_set_di(data);
break;
case EE_STATE_0:
case EE_STATE_0_0:
switch ((jerry_ee_address_data >> 4) & 0x03)
{
+ // Opcode 00 00: eEWDS (Erase/Write disable)
case 0: jerry_ee_state=EE_STATE_0_0_0; break;
+ // Opcode 00 01: eWRAL (Write all registers)
case 1: jerry_ee_state=EE_STATE_0_0_1; break;
+ // Opcode 00 10: eERAL (Erase all registers)
case 2: jerry_ee_state=EE_STATE_0_0_2; break;
+ // Opcode 00 11: eEWEN (Erase/Write enable)
case 3: jerry_ee_state=EE_STATE_0_0_3; break;
}
+
eeprom_set_di(data);
break;
case EE_STATE_0_0_0:
case EE_STATE_0_0_1_0:
// WriteLog("eeprom: filling eeprom with 0x%.4x\n",data);
if (jerry_writes_enabled)
+ {
for(int i=0; i<64; i++)
eeprom_ram[i] = jerry_ee_data;
- EEPROMSave(); // Save it NOW!
+ EEPROMSave(); // Save it NOW!
+ }
+
//else
// WriteLog("eeprom: not writing because read only\n");
jerry_ee_state = EE_STATE_BUSY;
case EE_STATE_1_1:
//WriteLog("eeprom: writing 0x%.4x at 0x%.2x\n",jerry_ee_data,jerry_ee_address_data);
if (jerry_writes_enabled)
+ {
eeprom_ram[jerry_ee_address_data] = jerry_ee_data;
+ EEPROMSave(); // Save it NOW!
+ }
- EEPROMSave(); // Save it NOW!
jerry_ee_state = EE_STATE_BUSY;
break;
case EE_STATE_2:
if (jerry_ee_direct_jump)
eeprom_set_di(data);
}
+
break;
case EE_READ_ADDRESS:
jerry_ee_address_data <<= 1;
if (jerry_ee_direct_jump)
eeprom_set_di(data);
}
+
break;
default:
jerry_ee_state = EE_STATE_OP_A;
}
}
-static void eeprom_set_cs(uint32_t state)
+
+static void eeprom_set_cs(uint32_t /*state*/)
{
// WriteLog("eeprom: cs=%i\n",state);
jerry_ee_state = EE_STATE_START;
jerry_writes_enabled = 1;
}
+
static uint32_t eeprom_get_do(void)
{
uint16_t data = 1;
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)
{
// WriteLog("eeprom: do=%i\n",data);
return data;
}
+
projects / virtualjaguar / blobdiff