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@SergioMartin86
SergioMartin86 committed Apr 13, 2024
1 parent e3ac020 commit 6ab4be0
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149 changes: 8 additions & 141 deletions core/cart_hw/eeprom_i2c.c
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Original file line number Diff line number Diff line change
Expand Up @@ -38,142 +38,9 @@

#include "shared.h"
#include "gamepad.h"
#include "eeprom_i2c.h"

/* Some notes from 8BitWizard (http://gendev.spritesmind.net/forum/viewtopic.php?t=206):
*
* Mode 1 (7-bit) - the chip takes a single byte with a 7-bit memory address and a R/W bit (X24C01)
* Mode 2 (8-bit) - the chip takes a 7-bit device address and R/W bit followed by an 8-bit memory address;
* the device address may contain up to three more memory address bits (24C01 - 24C16).
* You can also string eight 24C01, four 24C02, two 24C08, or various combinations, set their address config lines correctly,
* and the result appears exactly the same as a 24C16
* Mode 3 (16-bit) - the chip takes a 7-bit device address and R/W bit followed by a 16-bit memory address (24C32 and larger)
*
*/

typedef enum
{
STAND_BY = 0,
WAIT_STOP,
GET_DEVICE_ADR,
GET_WORD_ADR_7BITS,
GET_WORD_ADR_HIGH,
GET_WORD_ADR_LOW,
WRITE_DATA,
READ_DATA
} T_I2C_STATE;

typedef enum
{
NO_EEPROM = -1,
EEPROM_X24C01,
EEPROM_X24C02,
EEPROM_24C01,
EEPROM_24C02,
EEPROM_24C04,
EEPROM_24C08,
EEPROM_24C16,
EEPROM_24C32,
EEPROM_24C64,
EEPROM_24C65,
EEPROM_24C128,
EEPROM_24C256,
EEPROM_24C512
} T_I2C_TYPE;

typedef struct
{
uint8 address_bits;
uint16 size_mask;
uint16 pagewrite_mask;
} T_I2C_SPEC;

static const T_I2C_SPEC i2c_specs[] =
{
{ 7 , 0x7F , 0x03},
{ 8 , 0xFF , 0x03},
{ 8 , 0x7F , 0x07},
{ 8 , 0xFF , 0x07},
{ 8 , 0x1FF , 0x0F},
{ 8 , 0x3FF , 0x0F},
{ 8 , 0x7FF , 0x0F},
{16 , 0xFFF , 0x1F},
{16 , 0x1FFF , 0x1F},
{16 , 0x1FFF , 0x3F},
{16 , 0x3FFF , 0x3F},
{16 , 0x7FFF , 0x3F},
{16 , 0xFFFF , 0x7F}
};

typedef struct
{
char id[16];
uint32 sp;
uint16 chk;
void (*mapper_init)(void);
T_I2C_TYPE eeprom_type;
} T_I2C_GAME;

static void mapper_i2c_ea_init(void);
static void mapper_i2c_sega_init(void);
static void mapper_i2c_acclaim_16M_init(void);
static void mapper_i2c_acclaim_32M_init(void);
static void mapper_i2c_jcart_init(void);

static const T_I2C_GAME i2c_database[] =
{
{"T-50176" , 0 , 0 , mapper_i2c_ea_init , EEPROM_X24C01 }, /* Rings of Power */
{"T-50396" , 0 , 0 , mapper_i2c_ea_init , EEPROM_X24C01 }, /* NHLPA Hockey 93 */
{"T-50446" , 0 , 0 , mapper_i2c_ea_init , EEPROM_X24C01 }, /* John Madden Football 93 */
{"T-50516" , 0 , 0 , mapper_i2c_ea_init , EEPROM_X24C01 }, /* John Madden Football 93 (Championship Ed.) */
{"T-50606" , 0 , 0 , mapper_i2c_ea_init , EEPROM_X24C01 }, /* Bill Walsh College Football (warning: invalid SRAM header !) */
{" T-12046" , 0 , 0 , mapper_i2c_sega_init , EEPROM_X24C01 }, /* Megaman - The Wily Wars (warning: SRAM hack exists !) */
{" T-12053" , 0 , 0 , mapper_i2c_sega_init , EEPROM_X24C01 }, /* Rockman Mega World (warning: SRAM hack exists !) */
{"MK-1215" , 0 , 0 , mapper_i2c_sega_init , EEPROM_X24C01 }, /* Evander 'Real Deal' Holyfield's Boxing */
{"MK-1228" , 0 , 0 , mapper_i2c_sega_init , EEPROM_X24C01 }, /* Greatest Heavyweights of the Ring (U)(E) */
{"G-5538" , 0 , 0 , mapper_i2c_sega_init , EEPROM_X24C01 }, /* Greatest Heavyweights of the Ring (J) */
{"PR-1993" , 0 , 0 , mapper_i2c_sega_init , EEPROM_X24C01 }, /* Greatest Heavyweights of the Ring (Prototype) */
{" G-4060" , 0 , 0 , mapper_i2c_sega_init , EEPROM_X24C01 }, /* Wonderboy in Monster World (warning: SRAM hack exists !) */
{"00001211" , 0 , 0 , mapper_i2c_sega_init , EEPROM_X24C01 }, /* Sports Talk Baseball */
{"00004076" , 0 , 0 , mapper_i2c_sega_init , EEPROM_X24C01 }, /* Honoo no Toukyuuji Dodge Danpei */
{"G-4524" , 0 , 0 , mapper_i2c_sega_init , EEPROM_X24C01 }, /* Ninja Burai Densetsu */
{"00054503" , 0 , 0 , mapper_i2c_sega_init , EEPROM_X24C01 }, /* Game Toshokan */
{"T-81033" , 0 , 0 , mapper_i2c_acclaim_16M_init , EEPROM_X24C02 }, /* NBA Jam (J) */
{"T-081326" , 0 , 0 , mapper_i2c_acclaim_16M_init , EEPROM_X24C02 }, /* NBA Jam (UE) */
{"T-081276" , 0 , 0 , mapper_i2c_acclaim_32M_init , EEPROM_24C02 }, /* NFL Quarterback Club */
{"T-81406" , 0 , 0 , mapper_i2c_acclaim_32M_init , EEPROM_24C04 }, /* NBA Jam TE */
{"T-081586" , 0 , 0 , mapper_i2c_acclaim_32M_init , EEPROM_24C16 }, /* NFL Quarterback Club '96 */
{"T-81476" , 0 , 0 , mapper_i2c_acclaim_32M_init , EEPROM_24C65 }, /* Frank Thomas Big Hurt Baseball */
{"T-81576" , 0 , 0 , mapper_i2c_acclaim_32M_init , EEPROM_24C65 }, /* College Slam */
{"T-120106" , 0 , 0 , mapper_i2c_jcart_init , EEPROM_24C08 }, /* Brian Lara Cricket */
{"00000000" , 0x444e4c44 , 0x168B , mapper_i2c_jcart_init , EEPROM_24C08 }, /* Micro Machines Military */
{"00000000" , 0x444e4c44 , 0x165E , mapper_i2c_jcart_init , EEPROM_24C16 }, /* Micro Machines Turbo Tournament 96 */
{"T-120096" , 0 , 0 , mapper_i2c_jcart_init , EEPROM_24C16 }, /* Micro Machines 2 - Turbo Tournament */
{"T-120146" , 0 , 0 , mapper_i2c_jcart_init , EEPROM_24C65 }, /* Brian Lara Cricket 96 / Shane Warne Cricket */
{"00000000" , 0xfffffffc , 0x168B , mapper_i2c_jcart_init , NO_EEPROM }, /* Super Skidmarks */
{"00000000" , 0xfffffffc , 0x165E , mapper_i2c_jcart_init , NO_EEPROM }, /* Pete Sampras Tennis (Prototype) */
{"T-120066" , 0 , 0 , mapper_i2c_jcart_init , NO_EEPROM }, /* Pete Sampras Tennis */
{"T-123456" , 0 , 0 , mapper_i2c_jcart_init , NO_EEPROM }, /* Pete Sampras Tennis 96 */
{"XXXXXXXX" , 0 , 0xDF39 , mapper_i2c_jcart_init , NO_EEPROM }, /* Pete Sampras Tennis 96 (Prototype ?) */
};

static struct
{
uint8 sda; /* current SDA line state */
uint8 scl; /* current SCL line state */
uint8 old_sda; /* previous SDA line state */
uint8 old_scl; /* previous SCL line state */
uint8 cycles; /* operation internal cycle (0-9) */
uint8 rw; /* operation type (1:READ, 0:WRITE) */
uint16 device_address; /* device address */
uint16 word_address; /* memory address */
uint8 buffer; /* write buffer */
T_I2C_STATE state; /* current operation state */
T_I2C_SPEC spec; /* EEPROM characteristics */
uint8 scl_in_bit; /* SCL (write) bit position */
uint8 sda_in_bit; /* SDA (write) bit position */
uint8 sda_out_bit; /* SDA (read) bit position */
} eeprom_i2c;

struct eeprom_i2c_t eeprom_i2c;

/********************************************************************/
/* I2C EEPROM mapper initialization */
Expand Down Expand Up @@ -653,7 +520,7 @@ static void mapper_i2c_generic_write8(uint32 address, uint32 data)
}
}

static void mapper_i2c_generic_write16(uint32 address, uint32 data)
void mapper_i2c_generic_write16(uint32 address, uint32 data)
{
eeprom_i2c.sda = (data >> eeprom_i2c.sda_in_bit) & 1;
eeprom_i2c.scl = (data >> eeprom_i2c.scl_in_bit) & 1;
Expand All @@ -665,7 +532,7 @@ static void mapper_i2c_generic_write16(uint32 address, uint32 data)
/* EA mapper (PWA P10003 & P10004 boards) */
/********************************************************************/

static void mapper_i2c_ea_init(void)
void mapper_i2c_ea_init(void)
{
int i;

Expand All @@ -692,7 +559,7 @@ static void mapper_i2c_ea_init(void)
/* SEGA mapper (171-5878, 171-6111, 171-6304 & 171-6584 boards) */
/********************************************************************/

static void mapper_i2c_sega_init(void)
void mapper_i2c_sega_init(void)
{
int i;

Expand All @@ -719,7 +586,7 @@ static void mapper_i2c_sega_init(void)
/* ACCLAIM 16M mapper (P/N 670120 board) */
/********************************************************************/

static void mapper_i2c_acclaim_16M_init(void)
void mapper_i2c_acclaim_16M_init(void)
{
int i;

Expand Down Expand Up @@ -790,7 +657,7 @@ static void mapper_acclaim_32M_write16(uint32 address, uint32 data)
}
}

static void mapper_i2c_acclaim_32M_init(void)
void mapper_i2c_acclaim_32M_init(void)
{
int i;

Expand Down Expand Up @@ -832,7 +699,7 @@ static uint32 mapper_i2c_jcart_read16(uint32 address)
return ((eeprom_i2c_out() << 7) | jcart_read(address));
}

static void mapper_i2c_jcart_init(void)
void mapper_i2c_jcart_init(void)
{
int i;

Expand Down
139 changes: 139 additions & 0 deletions core/cart_hw/eeprom_i2c.h
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Original file line number Diff line number Diff line change
Expand Up @@ -39,6 +39,145 @@
#ifndef _EEPROM_I2C_H_
#define _EEPROM_I2C_H_

#include <stdint.h>

/* Some notes from 8BitWizard (http://gendev.spritesmind.net/forum/viewtopic.php?t=206):
*
* Mode 1 (7-bit) - the chip takes a single byte with a 7-bit memory address and a R/W bit (X24C01)
* Mode 2 (8-bit) - the chip takes a 7-bit device address and R/W bit followed by an 8-bit memory address;
* the device address may contain up to three more memory address bits (24C01 - 24C16).
* You can also string eight 24C01, four 24C02, two 24C08, or various combinations, set their address config lines correctly,
* and the result appears exactly the same as a 24C16
* Mode 3 (16-bit) - the chip takes a 7-bit device address and R/W bit followed by a 16-bit memory address (24C32 and larger)
*
*/

typedef enum
{
STAND_BY = 0,
WAIT_STOP,
GET_DEVICE_ADR,
GET_WORD_ADR_7BITS,
GET_WORD_ADR_HIGH,
GET_WORD_ADR_LOW,
WRITE_DATA,
READ_DATA
} T_I2C_STATE;

typedef enum
{
NO_EEPROM = -1,
EEPROM_X24C01,
EEPROM_X24C02,
EEPROM_24C01,
EEPROM_24C02,
EEPROM_24C04,
EEPROM_24C08,
EEPROM_24C16,
EEPROM_24C32,
EEPROM_24C64,
EEPROM_24C65,
EEPROM_24C128,
EEPROM_24C256,
EEPROM_24C512
} T_I2C_TYPE;

typedef struct
{
uint8_t address_bits;
uint16_t size_mask;
uint16_t pagewrite_mask;
} T_I2C_SPEC;

static const T_I2C_SPEC i2c_specs[] =
{
{ 7 , 0x7F , 0x03},
{ 8 , 0xFF , 0x03},
{ 8 , 0x7F , 0x07},
{ 8 , 0xFF , 0x07},
{ 8 , 0x1FF , 0x0F},
{ 8 , 0x3FF , 0x0F},
{ 8 , 0x7FF , 0x0F},
{16 , 0xFFF , 0x1F},
{16 , 0x1FFF , 0x1F},
{16 , 0x1FFF , 0x3F},
{16 , 0x3FFF , 0x3F},
{16 , 0x7FFF , 0x3F},
{16 , 0xFFFF , 0x7F}
};

typedef struct
{
char id[16];
uint32_t sp;
uint16_t chk;
void (*mapper_init)(void);
T_I2C_TYPE eeprom_type;
} T_I2C_GAME;

extern void mapper_i2c_ea_init(void);
extern void mapper_i2c_sega_init(void);
extern void mapper_i2c_acclaim_16M_init(void);
extern void mapper_i2c_acclaim_32M_init(void);
extern void mapper_i2c_jcart_init(void);

static const T_I2C_GAME i2c_database[] =
{
{"T-50176" , 0 , 0 , mapper_i2c_ea_init , EEPROM_X24C01 }, /* Rings of Power */
{"T-50396" , 0 , 0 , mapper_i2c_ea_init , EEPROM_X24C01 }, /* NHLPA Hockey 93 */
{"T-50446" , 0 , 0 , mapper_i2c_ea_init , EEPROM_X24C01 }, /* John Madden Football 93 */
{"T-50516" , 0 , 0 , mapper_i2c_ea_init , EEPROM_X24C01 }, /* John Madden Football 93 (Championship Ed.) */
{"T-50606" , 0 , 0 , mapper_i2c_ea_init , EEPROM_X24C01 }, /* Bill Walsh College Football (warning: invalid SRAM header !) */
{" T-12046" , 0 , 0 , mapper_i2c_sega_init , EEPROM_X24C01 }, /* Megaman - The Wily Wars (warning: SRAM hack exists !) */
{" T-12053" , 0 , 0 , mapper_i2c_sega_init , EEPROM_X24C01 }, /* Rockman Mega World (warning: SRAM hack exists !) */
{"MK-1215" , 0 , 0 , mapper_i2c_sega_init , EEPROM_X24C01 }, /* Evander 'Real Deal' Holyfield's Boxing */
{"MK-1228" , 0 , 0 , mapper_i2c_sega_init , EEPROM_X24C01 }, /* Greatest Heavyweights of the Ring (U)(E) */
{"G-5538" , 0 , 0 , mapper_i2c_sega_init , EEPROM_X24C01 }, /* Greatest Heavyweights of the Ring (J) */
{"PR-1993" , 0 , 0 , mapper_i2c_sega_init , EEPROM_X24C01 }, /* Greatest Heavyweights of the Ring (Prototype) */
{" G-4060" , 0 , 0 , mapper_i2c_sega_init , EEPROM_X24C01 }, /* Wonderboy in Monster World (warning: SRAM hack exists !) */
{"00001211" , 0 , 0 , mapper_i2c_sega_init , EEPROM_X24C01 }, /* Sports Talk Baseball */
{"00004076" , 0 , 0 , mapper_i2c_sega_init , EEPROM_X24C01 }, /* Honoo no Toukyuuji Dodge Danpei */
{"G-4524" , 0 , 0 , mapper_i2c_sega_init , EEPROM_X24C01 }, /* Ninja Burai Densetsu */
{"00054503" , 0 , 0 , mapper_i2c_sega_init , EEPROM_X24C01 }, /* Game Toshokan */
{"T-81033" , 0 , 0 , mapper_i2c_acclaim_16M_init , EEPROM_X24C02 }, /* NBA Jam (J) */
{"T-081326" , 0 , 0 , mapper_i2c_acclaim_16M_init , EEPROM_X24C02 }, /* NBA Jam (UE) */
{"T-081276" , 0 , 0 , mapper_i2c_acclaim_32M_init , EEPROM_24C02 }, /* NFL Quarterback Club */
{"T-81406" , 0 , 0 , mapper_i2c_acclaim_32M_init , EEPROM_24C04 }, /* NBA Jam TE */
{"T-081586" , 0 , 0 , mapper_i2c_acclaim_32M_init , EEPROM_24C16 }, /* NFL Quarterback Club '96 */
{"T-81476" , 0 , 0 , mapper_i2c_acclaim_32M_init , EEPROM_24C65 }, /* Frank Thomas Big Hurt Baseball */
{"T-81576" , 0 , 0 , mapper_i2c_acclaim_32M_init , EEPROM_24C65 }, /* College Slam */
{"T-120106" , 0 , 0 , mapper_i2c_jcart_init , EEPROM_24C08 }, /* Brian Lara Cricket */
{"00000000" , 0x444e4c44 , 0x168B , mapper_i2c_jcart_init , EEPROM_24C08 }, /* Micro Machines Military */
{"00000000" , 0x444e4c44 , 0x165E , mapper_i2c_jcart_init , EEPROM_24C16 }, /* Micro Machines Turbo Tournament 96 */
{"T-120096" , 0 , 0 , mapper_i2c_jcart_init , EEPROM_24C16 }, /* Micro Machines 2 - Turbo Tournament */
{"T-120146" , 0 , 0 , mapper_i2c_jcart_init , EEPROM_24C65 }, /* Brian Lara Cricket 96 / Shane Warne Cricket */
{"00000000" , 0xfffffffc , 0x168B , mapper_i2c_jcart_init , NO_EEPROM }, /* Super Skidmarks */
{"00000000" , 0xfffffffc , 0x165E , mapper_i2c_jcart_init , NO_EEPROM }, /* Pete Sampras Tennis (Prototype) */
{"T-120066" , 0 , 0 , mapper_i2c_jcart_init , NO_EEPROM }, /* Pete Sampras Tennis */
{"T-123456" , 0 , 0 , mapper_i2c_jcart_init , NO_EEPROM }, /* Pete Sampras Tennis 96 */
{"XXXXXXXX" , 0 , 0xDF39 , mapper_i2c_jcart_init , NO_EEPROM }, /* Pete Sampras Tennis 96 (Prototype ?) */
};

struct eeprom_i2c_t
{
uint8_t sda; /* current SDA line state */
uint8_t scl; /* current SCL line state */
uint8_t old_sda; /* previous SDA line state */
uint8_t old_scl; /* previous SCL line state */
uint8_t cycles; /* operation internal cycle (0-9) */
uint8_t rw; /* operation type (1:READ, 0:WRITE) */
uint16_t device_address; /* device address */
uint16_t word_address; /* memory address */
uint8_t buffer; /* write buffer */
T_I2C_STATE state; /* current operation state */
T_I2C_SPEC spec; /* EEPROM characteristics */
uint8_t scl_in_bit; /* SCL (write) bit position */
uint8_t sda_in_bit; /* SDA (write) bit position */
uint8_t sda_out_bit; /* SDA (read) bit position */
};

extern struct eeprom_i2c_t eeprom_i2c;

/* Function prototypes */
extern void eeprom_i2c_init(void);

Expand Down

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