mirror of
https://github.com/sanni/cartreader.git
synced 2024-11-27 23:14:14 +01:00
Add support for EMS GB Smart 32M flash cart
This commit is contained in:
splash5
parent
5d49302305
commit
a5f629df78
@ -149,6 +149,9 @@ typedef enum COLOR_T {
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#define mode_NES 15
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#define mode_SMS 16
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#define mode_SEGA_CD 17
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#define mode_GB_GBSmart 18
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#define mode_GB_GBSmart_Flash 19
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#define mode_GB_GBSmart_Game 20
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// optimization-safe nop delay
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#define NOP __asm__ __volatile__ ("nop\n\t")
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@ -1486,6 +1489,15 @@ void loop() {
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else if (mode == mode_SEGA_CD) {
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segaCDMenu();
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}
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else if (mode == mode_GB_GBSmart) {
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gbSmartMenu();
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}
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else if (mode == mode_GB_GBSmart_Flash) {
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gbSmartFlashMenu();
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}
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else if (mode == mode_GB_GBSmart_Game) {
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gbSmartGameOptions();
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}
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else {
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display_Clear();
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println_Msg(F("Menu Error"));
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@ -17,7 +17,8 @@ uint16_t sramEndAddress = 0;
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static const char gbxMenuItem1[] PROGMEM = "Game Boy (Color)";
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static const char gbxMenuItem2[] PROGMEM = "Game Boy Advance";
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static const char gbxMenuItem3[] PROGMEM = "NPower GB Memory";
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static const char* const menuOptionsGBx[] PROGMEM = {gbxMenuItem1, gbxMenuItem2, gbxMenuItem3};
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static const char gbxMenuItem4[] PROGMEM = "GB Smart";
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static const char* const menuOptionsGBx[] PROGMEM = {gbxMenuItem1, gbxMenuItem2, gbxMenuItem3, gbxMenuItem4};
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// GB menu items
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static const char GBMenuItem1[] PROGMEM = "Read Rom";
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@ -33,8 +34,8 @@ void gbxMenu() {
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// create menu with title and 3 options to choose from
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unsigned char gbType;
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// Copy menuOptions out of progmem
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convertPgm(menuOptionsGBx, 3);
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gbType = question_box(F("Select Game Boy"), menuOptions, 3, 0);
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convertPgm(menuOptionsGBx, 4);
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gbType = question_box(F("Select Game Boy"), menuOptions, 4, 0);
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// wait for user choice to come back from the question box menu
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switch (gbType)
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@ -59,6 +60,13 @@ void gbxMenu() {
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setup_GBM();
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mode = mode_GBM;
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break;
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case 3:
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display_Clear();
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display_Update();
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setup_GBSmart();
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mode = mode_GB_GBSmart;
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break;
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}
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}
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750
Cart_Reader/GBSmart.ino
Normal file
750
Cart_Reader/GBSmart.ino
Normal file
@ -0,0 +1,750 @@
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//******************************************
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// GB SMART MODULE
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// Supports 32M cart with LH28F016SUT flash
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//******************************************
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#define GB_SMART_GAMES_PER_PAGE 6
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/******************************************
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Menu
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*****************************************/
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// GB Smart menu items
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static const char gbSmartMenuItem1[] PROGMEM = "Game Menu";
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static const char gbSmartMenuItem2[] PROGMEM = "Flash Menu";
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static const char gbSmartMenuItem3[] PROGMEM = "Reset";
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static const char* const menuOptionsGBSmart[] PROGMEM = {gbSmartMenuItem1, gbSmartMenuItem2, gbSmartMenuItem3};
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static const char gbSmartFlashMenuItem1[] PROGMEM = "Read Flash";
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static const char gbSmartFlashMenuItem2[] PROGMEM = "Write Flash";
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static const char gbSmartFlashMenuItem3[] PROGMEM = "Back";
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static const char* const menuOptionsGBSmartFlash[] PROGMEM = {gbSmartFlashMenuItem1, gbSmartFlashMenuItem2, gbSmartFlashMenuItem3};
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static const char gbSmartGameMenuItem1[] PROGMEM = "Read Game";
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static const char gbSmartGameMenuItem2[] PROGMEM = "Read SRAM";
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static const char gbSmartGameMenuItem3[] PROGMEM = "Write SRAM";
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static const char gbSmartGameMenuItem4[] PROGMEM = "Switch Game";
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static const char gbSmartGameMenuItem5[] PROGMEM = "Reset";
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static const char* const menuOptionsGBSmartGame[] PROGMEM = {gbSmartGameMenuItem1, gbSmartGameMenuItem2, gbSmartGameMenuItem3, gbSmartGameMenuItem4, gbSmartGameMenuItem5};
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typedef struct
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{
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uint8_t start_bank;
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uint8_t rom_type;
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uint8_t rom_size;
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uint8_t sram_size;
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char title[16];
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} GBSmartGameInfo;
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uint32_t gbSmartSize = 32 * 131072;
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uint16_t gbSmartBanks = 256;
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uint8_t gbSmartBanksPerFlashChip = 128;
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uint8_t gbSmartBanksPerFlashBlock = 4;
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uint32_t gbSmartFlashBlockSize = (gbSmartBanksPerFlashBlock << 14);
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uint8_t gbSmartRomSizeGB = 0x07;
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uint8_t gbSmartSramSizeGB = 0x04;
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uint8_t gbSmartFlashSizeGB = 0x06;
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GBSmartGameInfo gbSmartGames[GB_SMART_GAMES_PER_PAGE];
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byte signature[48];
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uint16_t gameMenuStartBank;
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extern boolean hasMenu;
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extern byte numGames;
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void setup_GBSmart()
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{
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// take from setup_GB
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// Set RST(PH0) to Input
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DDRH &= ~(1 << 0);
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// Activate Internal Pullup Resistors
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PORTH |= (1 << 0);
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// Set Address Pins to Output
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//A0-A7
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DDRF = 0xFF;
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//A8-A15
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DDRK = 0xFF;
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// Set Control Pins to Output CS(PH3) WR(PH5) RD(PH6) AUDIOIN(PH4) RESET(PH0)
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DDRH |= (1 << 0) | (1 << 3) | (1 << 4) | (1 << 5) | (1 << 6);
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// Output a high signal on all pins, pins are active low therefore everything is disabled now
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PORTH |= (1 << 0) | (1 << 3) | (1 << 4) | (1 << 5) | (1 << 6);
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// Set Data Pins (D0-D7) to Input
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DDRC = 0x00;
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delay(400);
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gbSmartRemapStartBank(0x00, 0x00, 0x00);
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getCartInfo_GB();
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for (byte i = 0; i < 0x30; i++)
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signature[i] = readByte_GB(0x0104 + i);
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gameMenuStartBank = 0x02;
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hasMenu = true;
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numGames = 0;
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display_Clear();
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display_Update();
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}
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void gbSmartMenu()
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{
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uint8_t mainMenu;
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// Copy menuOptions out of progmem
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convertPgm(menuOptionsGBSmart, 3);
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mainMenu = question_box(F("GB Smart"), menuOptions, 3, 0);
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// wait for user choice to come back from the question box menu
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switch (mainMenu)
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{
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case 0:
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{
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gbSmartGameMenu();
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break;
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}
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case 1:
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{
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mode = mode_GB_GBSmart_Flash;
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break;
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}
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default:
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{
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asm volatile (" jmp 0");
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break;
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}
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}
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}
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void gbSmartGameOptions()
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{
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uint8_t gameSubMenu;
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convertPgm(menuOptionsGBSmartGame, 5);
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gameSubMenu = question_box(F("GB Smart Game Menu"), menuOptions, 5, 0);
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switch (gameSubMenu)
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{
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case 0: // Read Game
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{
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display_Clear();
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sd.chdir("/");
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readROM_GB();
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compare_checksum_GB();
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break;
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}
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case 1: // Read SRAM
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{
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display_Clear();
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sd.chdir("/");
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readSRAM_GB();
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break;
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}
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case 2: // Write SRAM
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{
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display_Clear();
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sd.chdir("/");
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writeSRAM_GB();
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uint32_t wrErrors = verifySRAM_GB();
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if (wrErrors == 0)
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{
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println_Msg(F("Verified OK"));
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display_Update();
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}
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else
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{
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print_Msg(F("Error: "));
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print_Msg(wrErrors);
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println_Msg(F(" bytes"));
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print_Error(F("did not verify."), false);
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}
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break;
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}
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case 3: // Switch Game
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{
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gameMenuStartBank = 0x02;
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gbSmartGameMenu();
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break;
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}
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default:
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{
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asm volatile (" jmp 0");
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break;
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}
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}
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if (gameSubMenu != 3)
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{
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println_Msg(F(""));
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println_Msg(F("Press Button..."));
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display_Update();
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wait();
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}
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}
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void gbSmartGameMenu()
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{
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uint8_t gameSubMenu = 0;
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gb_smart_load_more_games:
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if (gameMenuStartBank > 0xfe)
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gameMenuStartBank = 0x02;
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gbSmartGetGames();
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if (hasMenu)
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{
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char menuOptionsGBSmartGames[7][20];
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int i = 0;
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for (; i < numGames; i++)
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strncpy(menuOptionsGBSmartGames[i], gbSmartGames[i].title, 16);
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strncpy(menuOptionsGBSmartGames[i], "...", 16);
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gameSubMenu = question_box(F("Select Game"), menuOptionsGBSmartGames, i + 1, 0);
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if (gameSubMenu >= i)
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goto gb_smart_load_more_games;
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}
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else
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{
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gameSubMenu = 0;
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}
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// copy romname
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strcpy(romName, gbSmartGames[gameSubMenu].title);
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// select a game
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gbSmartRemapStartBank(gbSmartGames[gameSubMenu].start_bank, gbSmartGames[gameSubMenu].rom_size, gbSmartGames[gameSubMenu].sram_size);
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getCartInfo_GB();
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mode = mode_GB_GBSmart_Game;
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}
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void gbSmartFlashMenu()
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{
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uint8_t flashSubMenu;
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convertPgm(menuOptionsGBSmartFlash, 3);
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flashSubMenu = question_box(F("GB Smart Flash Menu"), menuOptions, 3, 0);
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switch (flashSubMenu)
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{
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case 0:
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{
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// read flash
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display_Clear();
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sd.chdir("/");
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EEPROM_readAnything(10, foldern);
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sprintf(fileName, "GBS%d.bin", foldern);
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sd.mkdir("GB/GBS", true);
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sd.chdir("GB/GBS");
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foldern = foldern + 1;
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EEPROM_writeAnything(10, foldern);
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gbSmartReadFlash();
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break;
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}
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case 1:
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{
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// write flash
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display_Clear();
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println_Msg(F("Attention"));
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println_Msg(F("This will erase your"));
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println_Msg(F("GB Smart Cartridge."));
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println_Msg(F(""));
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println_Msg(F("Press Button"));
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println_Msg(F("to continue"));
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display_Update();
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wait();
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display_Clear();
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filePath[0] = '\0';
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sd.chdir("/");
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fileBrowser(F("Select 4MB file"));
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sprintf(filePath, "%s/%s", filePath, fileName);
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gbSmartWriteFlash();
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break;
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}
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default:
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{
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mode = mode_GB_GBSmart;
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return;
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}
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}
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println_Msg(F(""));
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println_Msg(F("Press Button..."));
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display_Update();
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wait();
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}
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void gbSmartGetGames()
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{
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static const byte menu_title[] = {0x47, 0x42, 0x31, 0x36, 0x4d};
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// reset remap setting
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gbSmartRemapStartBank(0x00, gbSmartRomSizeGB, gbSmartSramSizeGB);
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uint16_t i;
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uint8_t myByte, myLength;
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// check if contain menu
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hasMenu = true;
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dataIn_GB();
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for (i = 0; i < 5; i++)
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{
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if (readByte_GB(0x0134 + i) != menu_title[i])
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{
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hasMenu = false;
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break;
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}
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}
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if (hasMenu)
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{
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for (i = gameMenuStartBank, numGames = 0; i < gbSmartBanks && numGames < GB_SMART_GAMES_PER_PAGE; )
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{
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myLength = 0;
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// switch bank
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dataOut();
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writeByte_GB(0x2100, i);
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dataIn_GB();
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// read signature
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for (uint8_t j = 0x00; j < 0x30; j++)
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{
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if (readByte_GB(0x4104 + j) != signature[j])
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{
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i += 0x02;
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goto gb_smart_get_game_loop_end;
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}
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}
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for (uint8_t j = 0; j < 15; j++)
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{
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myByte = readByte_GB(0x4134 + j);
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if (((char(myByte) >= 0x30 && char(myByte) <= 0x39) ||
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(char(myByte) >= 0x41 && char(myByte) <= 0x7a)))
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gbSmartGames[numGames].title[myLength++] = char(myByte);
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}
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gbSmartGames[numGames].title[myLength] = 0x00;
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gbSmartGames[numGames].start_bank = i;
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gbSmartGames[numGames].rom_type = readByte_GB(0x4147);
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gbSmartGames[numGames].rom_size = readByte_GB(0x4148);
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gbSmartGames[numGames].sram_size = readByte_GB(0x4149);
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myByte = (2 << gbSmartGames[numGames].rom_size);
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i += myByte;
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numGames++;
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gb_smart_get_game_loop_end:;
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}
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gameMenuStartBank = i;
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}
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else
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{
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dataIn_GB();
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for (uint8_t j = 0; j < 15; j++)
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{
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myByte = readByte_GB(0x0134 + j);
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if (((char(myByte) >= 0x30 && char(myByte) <= 0x39) ||
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(char(myByte) >= 0x41 && char(myByte) <= 0x7a)))
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gbSmartGames[0].title[myLength++] = char(myByte);
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}
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gbSmartGames[0].title[myLength] = 0x00;
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gbSmartGames[0].start_bank = 0x00;
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gbSmartGames[0].rom_type = readByte_GB(0x0147);
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gbSmartGames[0].rom_size = readByte_GB(0x0148);
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gbSmartGames[0].sram_size = readByte_GB(0x0149);
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numGames = 1;
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gameMenuStartBank = 0xfe;
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}
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}
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void gbSmartReadFlash()
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{
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print_Msg(F("Saving as GB/GBS/"));
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print_Msg(fileName);
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println_Msg(F("..."));
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display_Update();
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if (!myFile.open(fileName, O_RDWR | O_CREAT))
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print_Error(F("Can't create file on SD"), true);
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// reset flash to read array state
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for (int i = 0x00; i < gbSmartBanks; i += gbSmartBanksPerFlashChip)
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gbSmartResetFlash(i);
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// remaps mmc to full access
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gbSmartRemapStartBank(0x00, gbSmartRomSizeGB, gbSmartSramSizeGB);
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// dump fixed bank 0x00
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dataIn_GB();
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for (uint16_t addr = 0x0000; addr <= 0x3fff; addr += 512)
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{
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for (uint16_t c = 0; c < 512; c++)
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sdBuffer[c] = readByte_GB(addr + c);
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myFile.write(sdBuffer, 512);
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}
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// read rest banks
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for (uint16_t bank = 0x01; bank < gbSmartBanks; bank++)
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{
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dataOut();
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writeByte_GB(0x2100, bank);
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dataIn_GB();
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for (uint16_t addr = 0x4000; addr <= 0x7fff; addr += 512)
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{
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for (uint16_t c = 0; c < 512; c++)
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sdBuffer[c] = readByte_GB(addr + c);
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myFile.write(sdBuffer, 512);
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}
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}
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// back to initial state
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writeByte_GB(0x2100, 0x01);
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myFile.close();
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println_Msg("");
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println_Msg(F("Finished reading"));
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display_Update();
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}
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void gbSmartWriteFlash()
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{
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for (int bank = 0x00; bank < gbSmartBanks; bank += gbSmartBanksPerFlashChip)
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{
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display_Clear();
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print_Msg(F("Erasing..."));
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display_Update();
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gbSmartEraseFlash(bank);
|
||||
gbSmartResetFlash(bank);
|
||||
|
||||
println_Msg(F("Done"));
|
||||
print_Msg(F("Blankcheck..."));
|
||||
display_Update();
|
||||
|
||||
if (!gbSmartBlankCheckingFlash(bank))
|
||||
print_Error(F("Could not erase flash"), true);
|
||||
|
||||
println_Msg(F("Passed"));
|
||||
display_Update();
|
||||
|
||||
// write full chip
|
||||
gbSmartWriteFlash(bank);
|
||||
|
||||
// reset chip
|
||||
gbSmartWriteFlashByte(0x0000, 0xff);
|
||||
}
|
||||
|
||||
print_Msg(F("Verifying..."));
|
||||
display_Update();
|
||||
|
||||
writeErrors = gbSmartVerifyFlash();
|
||||
if (writeErrors == 0)
|
||||
{
|
||||
println_Msg(F("OK"));
|
||||
display_Update();
|
||||
}
|
||||
else
|
||||
{
|
||||
print_Msg(F("Error: "));
|
||||
print_Msg(writeErrors);
|
||||
println_Msg(F(" bytes "));
|
||||
print_Error(F("did not verify."), true);
|
||||
}
|
||||
}
|
||||
|
||||
void gbSmartWriteFlash(uint32_t start_bank)
|
||||
{
|
||||
if (!myFile.open(filePath, O_READ))
|
||||
print_Error(F("Can't open file on SD"), true);
|
||||
|
||||
// switch to flash base bank
|
||||
gbSmartRemapStartBank(start_bank, gbSmartFlashSizeGB, gbSmartSramSizeGB);
|
||||
|
||||
myFile.seekCur((start_bank << 14));
|
||||
|
||||
print_Msg(F("Writing Bank 0x"));
|
||||
print_Msg(start_bank, HEX);
|
||||
print_Msg(F("..."));
|
||||
display_Update();
|
||||
|
||||
// handle bank 0x00 on 0x0000
|
||||
gbSmartWriteFlashFromMyFile(0x0000);
|
||||
|
||||
// handle rest banks on 0x4000
|
||||
for (uint8_t bank = 0x01; bank < gbSmartBanksPerFlashChip; bank++)
|
||||
{
|
||||
dataOut();
|
||||
writeByte_GB(0x2100, bank);
|
||||
|
||||
gbSmartWriteFlashFromMyFile(0x4000);
|
||||
}
|
||||
|
||||
myFile.close();
|
||||
println_Msg("");
|
||||
}
|
||||
|
||||
void gbSmartWriteFlashFromMyFile(uint32_t addr)
|
||||
{
|
||||
for (uint16_t i = 0; i < 16384; i += 256)
|
||||
{
|
||||
myFile.read(sdBuffer, 256);
|
||||
|
||||
// sequence load to page
|
||||
dataOut();
|
||||
gbSmartWriteFlashByte(addr, 0xe0);
|
||||
gbSmartWriteFlashByte(addr, 0xff);
|
||||
gbSmartWriteFlashByte(addr, 0x00); // BCH should be 0x00
|
||||
|
||||
// fill page buffer
|
||||
for (int d = 0; d < 256; d++)
|
||||
gbSmartWriteFlashByte(d, sdBuffer[d]);
|
||||
|
||||
// start flashing page
|
||||
gbSmartWriteFlashByte(addr, 0x0c);
|
||||
gbSmartWriteFlashByte(addr, 0xff);
|
||||
gbSmartWriteFlashByte(addr + i, 0x00); // BCH should be 0x00
|
||||
|
||||
// waiting for finishing
|
||||
dataIn_GB();
|
||||
while ((readByte_GB(addr + i) & 0x80) == 0x00);
|
||||
}
|
||||
|
||||
// blink LED
|
||||
PORTB ^= (1 << 4);
|
||||
}
|
||||
|
||||
uint32_t gbSmartVerifyFlash()
|
||||
{
|
||||
uint32_t verified = 0;
|
||||
|
||||
if (!myFile.open(filePath, O_READ))
|
||||
{
|
||||
verified = 0xffffffff;
|
||||
print_Error(F("Can't open file on SD"), false);
|
||||
}
|
||||
else
|
||||
{
|
||||
// remaps mmc to full access
|
||||
gbSmartRemapStartBank(0x00, gbSmartRomSizeGB, gbSmartSramSizeGB);
|
||||
|
||||
// verify bank 0x00
|
||||
dataIn_GB();
|
||||
for (uint16_t addr = 0x0000; addr <= 0x3fff; addr += 512)
|
||||
{
|
||||
myFile.read(sdBuffer, 512);
|
||||
|
||||
for (uint16_t c = 0; c < 512; c++)
|
||||
{
|
||||
if (readByte_GB(addr + c) != sdBuffer[c])
|
||||
verified++;
|
||||
}
|
||||
}
|
||||
|
||||
// verify rest banks
|
||||
for (uint16_t bank = 0x01; bank < gbSmartBanks; bank++)
|
||||
{
|
||||
dataOut();
|
||||
writeByte_GB(0x2100, bank);
|
||||
|
||||
dataIn_GB();
|
||||
for (uint16_t addr = 0x4000; addr <= 0x7fff; addr += 512)
|
||||
{
|
||||
myFile.read(sdBuffer, 512);
|
||||
|
||||
for (uint16_t c = 0; c < 512; c++)
|
||||
{
|
||||
if (readByte_GB(addr + c) != sdBuffer[c])
|
||||
verified++;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// back to initial state
|
||||
writeByte_GB(0x2100, 0x01);
|
||||
|
||||
myFile.close();
|
||||
}
|
||||
|
||||
return verified;
|
||||
}
|
||||
|
||||
byte gbSmartBlankCheckingFlash(uint8_t flash_start_bank)
|
||||
{
|
||||
gbSmartRemapStartBank(flash_start_bank, gbSmartFlashSizeGB, gbSmartSramSizeGB);
|
||||
|
||||
// check first bank
|
||||
dataIn_GB();
|
||||
for (uint16_t addr = 0x0000; addr <= 0x3fff; addr++)
|
||||
{
|
||||
if (readByte_GB(addr) != 0xff)
|
||||
return 0;
|
||||
}
|
||||
|
||||
// check rest banks
|
||||
for (uint16_t bank = 0x01; bank < gbSmartBanksPerFlashChip; bank++)
|
||||
{
|
||||
dataOut();
|
||||
writeByte_GB(0x2100, bank);
|
||||
|
||||
dataIn_GB();
|
||||
for (uint16_t addr = 0x4000; addr <= 0x7fff; addr++)
|
||||
{
|
||||
if (readByte_GB(addr) != 0xff)
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
||||
void gbSmartResetFlash(uint8_t flash_start_bank)
|
||||
{
|
||||
gbSmartRemapStartBank(flash_start_bank, gbSmartFlashSizeGB, gbSmartSramSizeGB);
|
||||
|
||||
dataOut();
|
||||
gbSmartWriteFlashByte(0x0, 0xff);
|
||||
}
|
||||
|
||||
void gbSmartEraseFlash(uint8_t flash_start_bank)
|
||||
{
|
||||
gbSmartRemapStartBank(flash_start_bank, gbSmartFlashSizeGB, gbSmartSramSizeGB);
|
||||
|
||||
// handling first flash block
|
||||
dataOut();
|
||||
gbSmartWriteFlashByte(0x0000, 0x20);
|
||||
gbSmartWriteFlashByte(0x0000, 0xd0);
|
||||
|
||||
dataIn_GB();
|
||||
while ((readByte_GB(0x0000) & 0x80) == 0x00);
|
||||
|
||||
// blink LED
|
||||
PORTB ^= (1 << 4);
|
||||
|
||||
// rest of flash block
|
||||
for (uint32_t ba = gbSmartBanksPerFlashBlock; ba < gbSmartBanksPerFlashChip; ba += gbSmartBanksPerFlashBlock)
|
||||
{
|
||||
dataOut();
|
||||
writeByte_GB(0x2100, ba);
|
||||
|
||||
gbSmartWriteFlashByte(0x4000, 0x20);
|
||||
gbSmartWriteFlashByte(0x4000, 0xd0);
|
||||
|
||||
dataIn_GB();
|
||||
while ((readByte_GB(0x4000) & 0x80) == 0x00);
|
||||
|
||||
// blink LED
|
||||
PORTB ^= (1 << 4);
|
||||
}
|
||||
}
|
||||
|
||||
void gbSmartWriteFlashByte(uint32_t myAddress, uint8_t myData)
|
||||
{
|
||||
PORTF = myAddress & 0xff;
|
||||
PORTK = (myAddress >> 8) & 0xff;
|
||||
PORTC = myData;
|
||||
|
||||
// wait for 62.5 x 4 = 250ns
|
||||
__asm__("nop\n\tnop\n\tnop\n\tnop\n\t");
|
||||
|
||||
// Pull FLASH_WE (PH4) low
|
||||
PORTH &= ~(1 << 4);
|
||||
|
||||
// pull low for another 250ns
|
||||
__asm__("nop\n\tnop\n\tnop\n\tnop\n\t");
|
||||
|
||||
// Pull FLASH_WE (PH4) high
|
||||
PORTH |= (1 << 4);
|
||||
|
||||
// pull high for another 250ns
|
||||
__asm__("nop\n\tnop\n\tnop\n\tnop\n\t");
|
||||
}
|
||||
|
||||
// rom_start_bank = 0x00 means back to original state
|
||||
void gbSmartRemapStartBank(uint8_t rom_start_bank, uint8_t rom_size, uint8_t sram_size)
|
||||
{
|
||||
rom_start_bank &= 0xfe;
|
||||
|
||||
dataOut();
|
||||
|
||||
// clear base bank setting
|
||||
writeByte_GB(0x1000, 0xa5);
|
||||
writeByte_GB(0x7000, 0x00);
|
||||
writeByte_GB(0x1000, 0x98);
|
||||
writeByte_GB(0x2000, rom_start_bank);
|
||||
|
||||
if (rom_start_bank > 1)
|
||||
{
|
||||
// start set new base bank
|
||||
writeByte_GB(0x1000, 0xa5);
|
||||
|
||||
dataIn_GB();
|
||||
rom_start_bank = gbSmartGetResizeParam(rom_size, sram_size);
|
||||
|
||||
dataOut();
|
||||
writeByte_GB(0x7000, rom_start_bank);
|
||||
writeByte_GB(0x1000, 0x98);
|
||||
|
||||
writeByte_GB(0x2100, 0x01);
|
||||
}
|
||||
|
||||
dataIn_GB();
|
||||
}
|
||||
|
||||
// Get magic number for 0x7000 register.
|
||||
// Use for setting correct rom and sram size
|
||||
// Code logic is take from SmartCard32M V1.3 menu code,
|
||||
// see 0x2db2 to 0x2e51 (0xa0 bytes)
|
||||
uint8_t gbSmartGetResizeParam(uint8_t rom_size, uint8_t sram_size)
|
||||
{
|
||||
if (rom_size < 0x0f)
|
||||
{
|
||||
rom_size &= 0x07;
|
||||
rom_size ^= 0x07;
|
||||
}
|
||||
else
|
||||
{
|
||||
rom_size = 0x01;
|
||||
}
|
||||
|
||||
if (sram_size > 0)
|
||||
{
|
||||
if (sram_size > 1)
|
||||
{
|
||||
sram_size--;
|
||||
sram_size ^= 0x03;
|
||||
sram_size <<= 4;
|
||||
sram_size &= 0x30;
|
||||
}
|
||||
else
|
||||
{
|
||||
sram_size = 0x20; // 2KiB treat as 8KiB
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
sram_size = 0x30; // no sram
|
||||
}
|
||||
|
||||
return (sram_size | rom_size);
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user