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cartreader/Cart_Reader/PCE.ino

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//******************************************
// PC Engine & TurboGrafx dump code by tamanegi_taro
// Revision 1.0.1 April 18th 2018
//
// Special thanks
// sanni - Arduino cart reader
// skaman - ROM size detection
// NO-INTRO - CRC list for game name detection
//
//******************************************
/******************************************
Defines
*****************************************/
#define HUCARD 0
#define TURBOCHIP 1
#define DETECTION_SIZE 64
#define CHKSUM_SKIP 0
#define CHKSUM_OK 1
#define CHKSUM_ERROR 2
/******************************************
Prototype Declarations
*****************************************/
/* Hoping that sanni will use this progressbar function */
void draw_progressbar(uint32_t processedsize, uint32_t totalsize);
void pcsMenu(void);
void pceMenu(void);
/* Several PCE dedicated functions */
void pin_read_write_PCE(void);
void pin_init_PCE(void);
void setup_cart_PCE(void);
void reset_cart_PCE(void);
uint8_t read_byte_PCE(uint32_t address);
uint8_t write_byte_PCE(uint32_t address, uint8_t data);
uint32_t detect_rom_size_PCE(void);
void read_bank_PCE(uint32_t address_start, uint32_t address_end, uint32_t *processed_size, uint32_t total_size);
void read_rom_PCE(void);
/******************************************
Variables
*****************************************/
uint8_t pce_internal_mode; //0 - HuCARD, 1 - TurboChip
/******************************************
Menu
*****************************************/
// PCE start menu
static const char pceMenuItem1[] PROGMEM = "HuCARD";
static const char pceMenuItem2[] PROGMEM = "Turbochip";
static const char* const menuOptionspce[] PROGMEM = {pceMenuItem1, pceMenuItem2};
// PCE card menu items
static const char pceCartMenuItem1[] PROGMEM = "Read Rom";
static const char pceCartMenuItem2[] PROGMEM = "Reset";
static const char* const menuOptionspceCart[] PROGMEM = {pceCartMenuItem1, pceCartMenuItem2};
void draw_progressbar(uint32_t processedsize, uint32_t totalsize)
{
uint8_t currentstatus, i;
static uint8_t previousstatus;
//Find progressbar length and draw if processed size is not 0
if (processedsize != 0)
{
// Progress bar
if (processedsize >= totalsize)
{
//if processed size is equal to total process size, finish drawing progress bar
currentstatus = 20;
}
else
{
//if processed size did not reach total process size, find how many "*" should be drawn
currentstatus = processedsize / (totalsize / 20);
}
//Draw "*" if needed
if (currentstatus > previousstatus)
{
for (i = previousstatus; i < currentstatus; i++)
{
if (i == 19)
{
//If end of progress bar, finish progress bar by drawing "]"
print_Msg(F("]"));
}
else
{
print_Msg(F("*"));
}
//Update display
display_Update();
}
//update previous "*" status
previousstatus = currentstatus;
}
}
else
{
//If processed size is 0, initialize and draw "["
previousstatus = 0;
print_Msg(F("["));
display_Update();
}
}
// PCE start menu
void pcsMenu(void) {
// create menu with title and 3 options to choose from
unsigned char pceDev;
// Copy menuOptions out of progmem
convertPgm(menuOptionspce, 2);
pceDev = question_box("Select device", menuOptions, 2, 0);
// wait for user choice to come back from the question box menu
switch (pceDev)
{
case 0:
//Hucard
display_Clear();
display_Update();
pce_internal_mode = HUCARD;
setup_cart_PCE();
mode = mode_PCE;
break;
case 1:
//Turbografx
display_Clear();
display_Update();
pce_internal_mode = TURBOCHIP;
setup_cart_PCE();
mode = mode_PCE;
break;
}
}
void pin_read_write_PCE(void)
{
// Set Address Pins to Output
//A0-A7
DDRF = 0xFF;
//A8-A15
DDRK = 0xFF;
//A16-A19
DDRL = (DDRL & 0xF0) | 0x0F;
//Set Control Pin to Output CS(PL4)
DDRL |= (1 << 4);
//Set CS(PL4) to HIGH
PORTL |= (1 << 4);
// Set Control Pins to Output RST(PH0) RD(PH3) WR(PH5)
DDRH |= (1 << 0) | (1 << 3) | (1 << 5);
// Switch all of above to HIGH
PORTH |= (1 << 0) | (1 << 3) | (1 << 5);
// Set IRQ(PH4) to Input
DDRH &= ~(1 << 4);
// Activate Internal Pullup Resistors
PORTH |= (1 << 4);
// Set Data Pins (D0-D7) to Input
DDRC = 0x00;
// Enable Internal Pullups
PORTC = 0xFF;
reset_cart_PCE();
}
void pin_init_PCE(void)
{
//Set Address Pins to input and pull up
DDRF = 0x00;
PORTF = 0xFF;
DDRK = 0x00;
PORTK = 0xFF;
DDRL = 0x00;
PORTL = 0xFF;
DDRH &= ~((1 << 0) | (1 << 3) | (1 << 5) | (1 << 6));
PORTH = (1 << 0) | (1 << 3) | (1 << 5) | (1 << 6);
// Set IRQ(PH4) to Input
DDRH &= ~(1 << 4);
// Activate Internal Pullup Resistors
PORTH |= (1 << 4);
// Set Data Pins (D0-D7) to Input
DDRC = 0x00;
// Enable Internal Pullups
PORTC = 0xFF;
}
void setup_cart_PCE(void)
{
// Set cicrstPin(PG1) to Output
DDRG |= (1 << 1);
// Output a high to disable CIC
PORTG |= (1 << 1);
pin_init_PCE();
}
void reset_cart_PCE(void)
{
//Set RESET as Low
PORTH &= ~(1 << 0);
delay(200);
//Set RESET as High
PORTH |= (1 << 0);
delay(200);
}
void set_address_PCE(uint32_t address)
{
//Set address
PORTF = address & 0xFF;
PORTK = (address >> 8) & 0xFF;
PORTL = (PORTL & 0xF0) | ((address >> 16) & 0x0F);
}
uint8_t read_byte_PCE(uint32_t address)
{
uint8_t ret;
uint8_t address_byte;
set_address_PCE(address);
// Arduino running at 16Mhz -> one nop = 62.5ns -> 1000ns total
__asm__("nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t");
// Set CS(PL4) and RD(PH3) as LOW
PORTL &= ~(1 << 4);
PORTH &= ~(1 << 3);
// Arduino running at 16Mhz -> one nop = 62.5ns -> 1000ns total
__asm__("nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t");
//read byte
ret = PINC;
//Swap bit order for PC Engine HuCARD
if (pce_internal_mode == HUCARD)
{
ret = ((ret & 0x01) << 7) | ((ret & 0x02) << 5) | ((ret & 0x04) << 3) | ((ret & 0x08) << 1) | ((ret & 0x10) >> 1) | ((ret & 0x20) >> 3) | ((ret & 0x40) >> 5) | ((ret & 0x80) >> 7);
}
// Set CS(PL4) and RD(PH3) as HIGH
PORTL |= (1 << 4);
PORTH |= (1 << 3);
//return read data
return ret;
}
uint8_t write_byte_PCE(uint32_t address, uint8_t data)
{
uint8_t ret;
uint8_t address_byte;
set_address_PCE(address);
// Arduino running at 16Mhz -> one nop = 62.5ns -> 1000ns total
__asm__("nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t");
//Swap bit order for PC Engine HuCARD
if (pce_internal_mode == HUCARD)
{
data = ((data & 0x01) << 7) | ((data & 0x02) << 5) | ((data & 0x04) << 3) | ((data & 0x08) << 1) | ((data & 0x10) >> 1) | ((data & 0x20) >> 3) | ((data & 0x40) >> 5) | ((data & 0x80) >> 7);
}
//write byte
PORTC = data;
// Set Data Pins (D0-D7) to Output
DDRC = 0xFF;
// Set CS(PL4) and WR(PH5) as LOW
PORTL &= ~(1 << 4);
PORTH &= ~(1 << 5);
// Arduino running at 16Mhz -> one nop = 62.5ns -> 1000ns total
__asm__("nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t");
// Set CS(PL4) and WR(PH5) as HIGH
PORTL |= (1 << 4);
PORTH |= (1 << 5);
// Set Data Pins (D0-D7) to Input
DDRC = 0x00;
// Enable Internal Pullups
PORTC = 0xFF;
//return read data
return ret;
}
//Confirm the size of ROM - 128Kb, 256Kb, 384Kb, 512Kb, 768Kb or 1024Kb
uint32_t detect_rom_size_PCE(void)
{
uint32_t rom_size;
uint8_t read_byte;
uint8_t current_byte;
uint8_t detect_128, detect_256, detect_512, detect_768;
//Initialize variables
detect_128 = 0;
detect_256 = 0;
detect_512 = 0;
detect_768 = 0;
//Set pins to read PC Engine cart
pin_read_write_PCE();
//Confirm where mirror address start from(128KB, 256KB, 512KB, 768, or 1024KB)
for (current_byte = 0; current_byte < DETECTION_SIZE; current_byte++) {
if ((current_byte != detect_128) && (current_byte != detect_256) && (current_byte != detect_512) && (current_byte != detect_768))
{
//If none matched, it is 1024KB
break;
}
//read byte for 128KB, 256KB, 512KB detection
read_byte = read_byte_PCE(current_byte);
//128KB detection
if (current_byte == detect_128)
{
if (read_byte_PCE(current_byte + 128UL * 1024UL) == read_byte)
{
detect_128++;
}
}
//256KB detection
if (current_byte == detect_256)
{
if (read_byte_PCE(current_byte + 256UL * 1024UL) == read_byte)
{
detect_256++;
}
}
//512KB detection
if (current_byte == detect_512)
{
if (read_byte_PCE(current_byte + 512UL * 1024UL) == read_byte)
{
detect_512++;
}
}
//768KB detection
read_byte = read_byte_PCE(current_byte + 512UL * 1024UL);
if (current_byte == detect_768)
{
if (read_byte_PCE(current_byte + 768UL * 1024UL) == read_byte)
{
detect_768++;
}
}
}
//debug
//sprintf(fileName, "%d %d %d %d", detect_128, detect_256, detect_512, detect_768); //using filename global variable as string. Initialzed in below anyways.
//println_Msg(fileName);
//ROM size detection by result
if (detect_128 == DETECTION_SIZE)
{
rom_size = 128;
}
else if (detect_256 == DETECTION_SIZE)
{
if (detect_512 == DETECTION_SIZE)
{
rom_size = 256;
}
else
{
//Another confirmation for 384KB because 384KB hucard has data in 0x0--0x40000 and 0x80000--0xA0000(0x40000 is mirror of 0x00000)
rom_size = 384;
}
}
else if (detect_512 == DETECTION_SIZE)
{
rom_size = 512;
}
else if (detect_768 == DETECTION_SIZE)
{
rom_size = 768;
}
else
{
rom_size = 1024;
}
//If rom size is more than or equal to 512KB, detect Street fighter II'
if (rom_size >= 512)
{
//Look for "NEC HE "
if (read_byte_PCE(0x7FFF9) == 'N' && read_byte_PCE(0x7FFFA) == 'E' && read_byte_PCE(0x7FFFB) == 'C'
&& read_byte_PCE(0x7FFFC) == ' ' && read_byte_PCE(0x7FFFD) == 'H' && read_byte_PCE(0x7FFFE) == 'E')
{
rom_size = 2560;
}
}
return rom_size;
}
/* Must be address_start and address_end should be 512 byte aligned */
void read_bank_PCE(uint32_t address_start, uint32_t address_end, uint32_t *processed_size, uint32_t total_size)
{
uint32_t currByte;
uint16_t c;
for (currByte = address_start; currByte < address_end; currByte += 512) {
for (c = 0; c < 512; c++) {
sdBuffer[c] = read_byte_PCE(currByte + c);
}
myFile.write(sdBuffer, 512);
*processed_size += 512;
draw_progressbar(*processed_size, total_size);
}
}
//Get line from file and convert upper case to lower case
void skip_line(SdFile* readfile)
{
int i = 0;
char str_buf;
while (readfile->available())
{
//Read 1 byte from file
str_buf = readfile->read();
//if end of file or newline found, execute command
if (str_buf == '\r')
{
readfile->read(); //dispose \n because \r\n
break;
}
i++;
}//End while
}
//Get line from file and convert upper case to lower case
void get_line(char* str_buf, SdFile* readfile, uint8_t maxi)
{
int i = 0;
while (readfile->available())
{
//If line size is more than maximum array, limit it.
if (i >= maxi)
{
i = maxi - 1;
}
//Read 1 byte from file
str_buf[i] = readfile->read();
//if end of file or newline found, execute command
if (str_buf[i] == '\r')
{
str_buf[i] = '\0';
readfile->read(); //dispose \n because \r\n
break;
}
i++;
}//End while
}
uint32_t calculate_crc32(int n, unsigned char c[], uint32_t r)
{
int i, j;
for (i = 0; i < n; i++) {
r ^= c[i];
for (j = 0; j < 8; j++)
if (r & 1) r = (r >> 1) ^ 0xEDB88320UL;
else r >>= 1;
}
return r;
}
void crc_search(char *file_p, char *folder_p, uint32_t rom_size)
{
SdFile rom, script;
uint32_t r, crc, processedsize;
char gamename[100];
char crc_file[9], crc_search[9];
uint8_t flag;
flag = CHKSUM_SKIP;
//Open list file. If no list file found, just skip
sd.chdir("/"); //Set read directry to root
if (script.open("PCE_CRC_LIST.txt", O_READ))
{
//Calculate CRC of ROM file
sd.chdir(folder_p);
if (rom.open(file_p, O_READ))
{
//Initialize flag as error
flag = CHKSUM_ERROR;
crc = 0xFFFFFFFFUL; //Initialize CRC
display_Clear();
println_Msg("Calculating chksum...");
processedsize = 0;
draw_progressbar(0, rom_size * 1024UL); //Initialize progress bar
while (rom.available())
{
r = rom.read(sdBuffer, 512);
crc = calculate_crc32(r, sdBuffer, crc);
processedsize += r;
draw_progressbar(processedsize, rom_size * 1024UL);
}
crc = crc ^ 0xFFFFFFFFUL; //Finish CRC calculation and progress bar
draw_progressbar(rom_size * 1024UL, rom_size * 1024UL);
//Display calculated CRC
sprintf(crc_file, "%08lX", crc);
//Search for same CRC in list
while (script.available()) {
//Read 2 lines (game name and CRC)
get_line(gamename, &script, 96);
get_line(crc_search, &script, 9);
skip_line(&script); //Skip every 3rd line
//if checksum search successful, rename the file and end search
if (strcmp(crc_search, crc_file) == 0)
{
print_Msg("Chksum OK ");
println_Msg(crc_file);
print_Msg(F("Saved to "));
print_Msg(folder_p);
print_Msg(F("/"));
print_Msg(gamename);
print_Msg(F(".pce"));
flag = CHKSUM_OK;
strcat(gamename, ".pce");
rom.rename(sd.vwd(), gamename);
break;
}
}
rom.close();
}
}
if (flag == CHKSUM_SKIP)
{
print_Msg(F("Saved to "));
print_Msg(folder_p);
print_Msg(F("/"));
print_Msg(file_p);
}
else if (flag == CHKSUM_ERROR)
{
print_Msg("Chksum Error ");
println_Msg(crc_file);
print_Msg(F("Saved to "));
print_Msg(folder_p);
print_Msg(F("/"));
print_Msg(file_p);
}
script.close();
}
void read_rom_PCE(void)
{
uint32_t rom_size;
uint32_t processed_size = 0;
//clear the screen
display_Clear();
rom_size = detect_rom_size_PCE();
sprintf(fileName, "Detected size: %dKB", rom_size); //using filename global variable as string. Initialzed in below anyways.
println_Msg(fileName);
//debug
//return;
// Get name, add extension and convert to char array for sd lib
strcpy(fileName, "PCEROM");
strcat(fileName, ".pce");
// create a new folder for the save file
EEPROM_readAnything(10, foldern);
sprintf(folder, "PCE/ROM/%s/%d", romName, foldern);
sd.mkdir(folder, true);
sd.chdir(folder);
println_Msg(F("Saving ROM..."));
display_Update();
// write new folder number back to eeprom
foldern = foldern + 1;
EEPROM_writeAnything(10, foldern);
//open file on sd card
if (!myFile.open(fileName, O_RDWR | O_CREAT)) {
print_Error(F("Can't create file on SD"), true);
}
pin_read_write_PCE();
//Initialize progress bar by setting processed size as 0
draw_progressbar(0, rom_size * 1024UL);
if (rom_size == 384)
{
//Read two sections. 0x000000--0x040000 and 0x080000--0x0A0000 for 384KB
read_bank_PCE(0, 0x40000, &processed_size, rom_size * 1024UL);
read_bank_PCE(0x80000, 0xA0000, &processed_size, rom_size * 1024UL);
}
else if (rom_size == 2560)
{
//Dump Street fighter II' Champion Edition
read_bank_PCE(0, 0x80000, &processed_size, rom_size * 1024UL); //Read first bank
write_byte_PCE(0x1FF0, 0xFF); //Display second bank
read_bank_PCE(0x80000, 0x100000, &processed_size, rom_size * 1024UL); //Read second bank
write_byte_PCE(0x1FF1, 0xFF); //Display third bank
read_bank_PCE(0x80000, 0x100000, &processed_size, rom_size * 1024UL); //Read third bank
write_byte_PCE(0x1FF2, 0xFF); //Display forth bank
read_bank_PCE(0x80000, 0x100000, &processed_size, rom_size * 1024UL); //Read forth bank
write_byte_PCE(0x1FF3, 0xFF); //Display fifth bank
read_bank_PCE(0x80000, 0x100000, &processed_size, rom_size * 1024UL); //Read fifth bank
}
else
{
//Read start form 0x000000 and keep reading until end of ROM
read_bank_PCE(0, rom_size * 1024UL, &processed_size, rom_size * 1024UL);
}
pin_init_PCE();
//Close the file:
myFile.close();
//CRC search and rename ROM
crc_search(fileName, folder, rom_size);
}
// SNES Menu
void pceMenu() {
// create menu with title and 7 options to choose from
unsigned char mainMenu;
// Copy menuOptions out of progmem
convertPgm(menuOptionspceCart, 2);
if (pce_internal_mode == HUCARD)
{
mainMenu = question_box("PCE HuCARD menu", menuOptions, 2, 0);
}
else
{
mainMenu = question_box("TG TurboChip menu", menuOptions, 2, 0);
}
// wait for user choice to come back from the question box menu
switch (mainMenu)
{
case 0:
display_Clear();
// Change working dir to root
sd.chdir("/");
read_rom_PCE();
break;
case 1:
asm volatile (" jmp 0");
break;
}
println_Msg(F(""));
println_Msg(F("Press Button..."));
display_Update();
wait();
}
//******************************************
// End of File
//******************************************
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