mirror of
https://github.com/sanni/cartreader.git
synced 2024-09-21 15:49:45 +02:00
555 lines
14 KiB
C++
555 lines
14 KiB
C++
//******************************************
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// SEGA MASTER SYSTEM MODULE
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//******************************************
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#include "options.h"
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#ifdef enable_MD
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/******************************************
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Variables
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*****************************************/
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/******************************************
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Menu
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*****************************************/
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// MD menu items
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static const char SMSMenuItem1[] PROGMEM = "Read Rom";
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static const char SMSMenuItem2[] PROGMEM = "Read from SRAM";
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static const char SMSMenuItem3[] PROGMEM = "Write to SRAM";
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static const char SMSMenuItem4[] PROGMEM = "Change Retrode Mode";
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static const char SMSMenuItem5[] PROGMEM = "Reset";
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static const char* const menuOptionsSMS[] PROGMEM = {SMSMenuItem1, SMSMenuItem2, SMSMenuItem3, SMSMenuItem4, SMSMenuItem5};
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// Set retrode_mode to true when using a retrode SMS/GG adapter
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static bool retrode_mode = false;
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static bool retrode_mode_sms = false; // true: SMS/Mark3 false: GG
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void _smsMenu() {
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// create menu with title and 2 options to choose from
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unsigned char mainMenu;
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// Copy menuOptions out of progmem
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int noptions = sizeof(menuOptionsSMS) / sizeof(menuOptionsSMS[0]);
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convertPgm(menuOptionsSMS, noptions);
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mainMenu = question_box(retrode_mode ? (retrode_mode_sms ? F("Retrode:SMS") : F("Retrode:GG")) : F("SMS/GG Retrode:NO"), menuOptions, noptions, 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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display_Clear();
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mode = mode_SMS;
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setup_SMS();
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// Change working dir to root
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sd.chdir("/");
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readROM_SMS();
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break;
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case 1:
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display_Clear();
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mode = mode_SMS;
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setup_SMS();
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// Change working dir to root
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sd.chdir("/");
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readSRAM_SMS();
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break;
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case 2:
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display_Clear();
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mode = mode_SMS;
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setup_SMS();
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// Change working dir to root
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sd.chdir("/");
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writeSRAM_SMS();
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break;
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case 3:
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if (!retrode_mode && !retrode_mode_sms) {
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// first state (default)
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retrode_mode = true; // Change to GG
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} else if (retrode_mode && !retrode_mode_sms) {
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// second state
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retrode_mode_sms = true; // Change to SMS
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} else {
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// third state, reset to the first state
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retrode_mode = false;
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retrode_mode_sms = false;
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}
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break;
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case 4:
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// Reset
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resetArduino();
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break;
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}
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println_Msg(retrode_mode ? (retrode_mode_sms ? F("Retrode Mode SMS") : F("Retrode Mode GG")) : F("Retrode Mode Off"));
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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 smsMenu() {
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for (;;) _smsMenu();
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}
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/******************************************
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Setup
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*****************************************/
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void setup_SMS() {
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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-A14
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DDRK = 0xFF;
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//A15
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DDRH |= (1 << 3);
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if (retrode_mode) {
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// Revert changes from the other mode
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PORTH &= ~((1 << 0) | (1 << 3) | (1 << 5));
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PORTL &= ~(1 << 1);
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DDRH &= ~((1 << 0) | (1 << 5));
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DDRL &= ~((1 << 1));
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// Set Control Pins to Output OE(PH6)
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DDRH |= (1 << 6);
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// WR(PL5) and RD(PL6)
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DDRL |= (1 << 5) | (1 << 6);
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// Setting OE(PH6) HIGH
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PORTH |= (1 << 6);
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// Setting WR(PL5) and RD(PL6) HIGH
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PORTL |= (1 << 5) | (1 << 6);
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} else {
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// Revert changes from the other mode
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PORTL &= ~((1 << 5) | (1 << 6));
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DDRL &= ~((1 << 5) | (1 << 6));
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// Set Control Pins to Output RST(PH0) WR(PH5) OE(PH6)
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DDRH |= (1 << 0) | (1 << 5) | (1 << 6);
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// CE(PL1)
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DDRL |= (1 << 1);
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// Setting RST(PH0) WR(PH5) OE(PH6) HIGH
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PORTH |= (1 << 0) | (1 << 5) | (1 << 6);
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// CE(PL1)
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PORTL |= (1 << 1);
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}
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// ROM has 16KB banks which can be mapped to one of three slots via register writes
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// Register Slot Address space
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// $fffd 0 $0000-$3fff
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// $fffe 1 $4000-$7fff
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// $ffff 2 $8000-$bfff
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// Disable sram
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writeByte_SMS(0xFFFC, 0);
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// Map first 3 banks so we can read-out the header info
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writeByte_SMS(0xFFFD, 0);
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writeByte_SMS(0xFFFE, 1);
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writeByte_SMS(0xFFFF, 2);
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delay(400);
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// Print all the info
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getCartInfo_SMS();
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}
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/******************************************
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Low level functions
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*****************************************/
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void writeByte_SMS(word myAddress, byte myData) {
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if (retrode_mode && !retrode_mode_sms) {
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// Set Data Pins (D8-D15) to Output
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DDRA = 0xFF;
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} else {
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// Set Data Pins (D0-D7) to Output
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DDRC = 0xFF;
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}
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// Set address
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PORTF = myAddress & 0xFF;
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PORTK = (myAddress >> 8) & 0xFF;
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if (!retrode_mode) {
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// CE(PH3) and OE(PH6) are connected
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PORTH = (PORTH & 0b11110111) | ((myAddress >> 12) & 0b00001000);
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}
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// Output data
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if (retrode_mode && !retrode_mode_sms) {
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PORTA = myData;
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} else {
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PORTC = myData;
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}
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// Arduino running at 16Mhz -> one nop = 62.5ns
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// Wait till output is stable
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__asm__("nop\n\t""nop\n\t""nop\n\t""nop\n\t");
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if (retrode_mode) {
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// Switch WR(PL5) and OE/CE(PH6) to LOW
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PORTL &= ~(1 << 5);
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PORTH &= ~(1 << 6);
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} else {
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// Switch CE(PL1) and WR(PH5) to LOW
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PORTL &= ~(1 << 1);
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PORTH &= ~(1 << 5);
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}
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// Leave WR low for at least 60ns
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__asm__("nop\n\t""nop\n\t""nop\n\t""nop\n\t");
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if (retrode_mode) {
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// Switch WR(PL5) and OE/CE(PH6) to HIGH
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PORTH |= (1 << 6);
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PORTL |= (1 << 5);
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} else {
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// Switch CE(PL1) and WR(PH5) to HIGH
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PORTH |= (1 << 5);
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PORTL |= (1 << 1);
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}
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// Leave WR high for at least 50ns
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__asm__("nop\n\t""nop\n\t""nop\n\t""nop\n\t");
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if (retrode_mode && !retrode_mode_sms) {
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// Set Data Pins (D8-D15) to Input
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DDRA = 0x00;
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} else {
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// Set Data Pins (D0-D7) to Input
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DDRC = 0x00;
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}
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}
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byte readByte_SMS(word myAddress) {
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if (retrode_mode && !retrode_mode_sms) {
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// Set Data Pins (D8-D15) to Input
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DDRA = 0x00;
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} else {
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// Set Data Pins (D0-D7) to Input
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DDRC = 0x00;
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}
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// Set Address
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PORTF = myAddress & 0xFF;
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PORTK = (myAddress >> 8) & 0xFF;
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if (!retrode_mode) {
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// CE(PH3) and OE(PH6) are connected
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PORTH = (PORTH & 0b11110111) | ((myAddress >> 12) & 0b00001000);
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}
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__asm__("nop\n\t""nop\n\t""nop\n\t""nop\n\t");
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if (retrode_mode) {
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// Switch RD(PL6) and OE(PH6) to LOW
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PORTL &= ~(1 << 6);
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PORTH &= ~(1 << 6);
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} else {
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// Switch CE(PL1) and OE(PH6) to LOW
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PORTL &= ~(1 << 1);
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PORTH &= ~(1 << 6);
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}
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__asm__("nop\n\t""nop\n\t""nop\n\t""nop\n\t");
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// Read
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byte tempByte = (retrode_mode && !retrode_mode_sms) ? PINA : PINC;
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if (retrode_mode) {
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// Switch RD(PL6) and OE(PH6) to HIGH
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PORTH |= (1 << 6);
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PORTL |= (1 << 6);
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} else {
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// Switch CE(PL1) and OE(PH6) to HIGH
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PORTH |= (1 << 6);
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PORTL |= (1 << 1);
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}
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__asm__("nop\n\t""nop\n\t""nop\n\t""nop\n\t");
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return tempByte;
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}
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//unsigned char hex2bcd (unsigned char x) {
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// unsigned char y;
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// y = (x / 10) << 4;
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// y = y | (x % 10);
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//return (y);
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//}
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byte readNibble(byte data, byte number) {
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return ((data >> (number * 4)) & 0xf);
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}
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/******************************************
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MASTER SYSTEM functions
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*****************************************/
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void getCartInfo_SMS() {
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// Rom size
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switch (readNibble(readByte_SMS(0x7fff), 0)) {
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case 0xa:
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// Adding UL gets rid of integer overflow compiler warning
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cartSize = 8 * 1024UL;
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break;
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case 0xb:
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cartSize = 16 * 1024UL;
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break;
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case 0xc:
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cartSize = 32 * 1024UL;
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break;
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case 0xd:
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cartSize = 48 * 1024UL;
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break;
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case 0xe:
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cartSize = 64 * 1024UL;
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break;
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case 0xf:
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cartSize = 128 * 1024UL;
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break;
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case 0x0:
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cartSize = 256 * 1024UL;
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break;
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case 0x1:
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cartSize = 512 * 1024UL;
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break;
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case 0x2:
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cartSize = 512 * 1024UL;
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break;
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default:
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cartSize = 48 * 1024UL;
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// LED Error
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rgb.setColor(0, 0, 255);
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break;
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}
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// Read TMR SEGA string
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for (byte i = 0; i < 8; i++) {
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romName[i] = char(readByte_SMS(0x7ff0 + i));
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}
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romName[8] = '\0';
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// Attempt to detect cart size by checking if TMR SEGA is mirrored
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unsigned long mirror_offset = cartSize;
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char romName2[9];
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while (mirror_offset < 1024 * 1024UL) {
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byte bank = 1 + (mirror_offset / (16 * 1024UL));
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writeByte_SMS(0xFFFE, bank);
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for (byte i = 0; i < 8; i++) {
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romName2[i] = char(readByte_SMS(0x7ff0 + i));
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}
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romName2[8] = '\0';
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// print_Msg(F("Name2: "));
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// println_Msg(romName2);
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// print_Msg(F("from bank "));
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// print_Msg(bank);
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// print_Msg(F(" offset "));
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// print_Msg_PaddedHex32(mirror_offset + 0x7ff0);
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// println_Msg(F(""));
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if (strcmp(romName2, romName) == 0) {
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break;
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}
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if (cartSize == 48 * 1024UL) {
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cartSize = 64 * 1024UL;
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} else {
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cartSize *= 2;
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}
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mirror_offset = cartSize;
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}
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writeByte_SMS(0xFFFE, 1);
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display_Clear();
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println_Msg(F("Cart Info"));
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println_Msg(F(" "));
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print_Msg(F("Name: "));
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println_Msg(romName);
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print_Msg(F("Size: "));
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print_Msg(cartSize / 1024);
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println_Msg(F("KB"));
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println_Msg(F(" "));
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if (strcmp(romName, "TMR SEGA") != 0) {
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print_Error(F("Not working yet"), false);
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sprintf(romName, "ERROR");
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cartSize = 48 * 1024UL;
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}
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// Wait for user input
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#ifdef enable_OLED
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println_Msg(F("Press Button..."));
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display_Update();
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wait();
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#endif
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// Turn off LED
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rgb.setColor(0, 0, 0);
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}
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// Read rom and save to the SD card
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void readROM_SMS() {
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// Get name, add extension and convert to char array for sd lib
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strcpy(fileName, romName);
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strcat(fileName, ".SMS");
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// create a new folder
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EEPROM_readAnything(0, foldern);
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sprintf(folder, "SMS/ROM/%s/%d", romName, foldern);
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sd.mkdir(folder, true);
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sd.chdir(folder);
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display_Clear();
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print_Msg(F("Saving to "));
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print_Msg(folder);
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println_Msg(F("/..."));
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display_Update();
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// write new folder number back to eeprom
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foldern = foldern + 1;
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EEPROM_writeAnything(0, foldern);
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// Open file on sd card
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if (!myFile.open(fileName, O_RDWR | O_CREAT)) {
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print_Error(F("SD Error"), true);
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}
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word bankSize = 16 * 1024UL;
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for (byte currBank = 0x0; currBank < (cartSize / bankSize); currBank++) {
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// Write current 16KB bank to slot 2 register 0xFFFF
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writeByte_SMS(0xFFFF, currBank);
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// Blink led
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PORTB ^= (1 << 4);
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// Read 16KB from slot 2 which starts at 0x8000
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for (word currBuffer = 0; currBuffer < bankSize; currBuffer += 512) {
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// Fill SD buffer
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for (int currByte = 0; currByte < 512; currByte++) {
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sdBuffer[currByte] = readByte_SMS(0x8000 + currBuffer + currByte);
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}
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// hexdump for debugging:
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// if (currBank == 0 && currBuffer == 0) {
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// for (word xi = 0; xi < 0x100; xi++) {
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// if (xi%16==0) {
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// print_Msg_PaddedHex16(xi);
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// print_Msg(F(" "));
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// }
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// print_Msg_PaddedHexByte(sdBuffer[xi]);
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// if (xi>0&&((xi+1)%16)==0) {
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// println_Msg(F(""));
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// } else {
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// print_Msg(F(" "));
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// }
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// }
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// }
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myFile.write(sdBuffer, 512);
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}
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}
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// Close the file:
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myFile.close();
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}
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// Read SRAM and save to the SD card
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void readSRAM_SMS() {
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// Get name, add extension and convert to char array for sd lib
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strcpy(fileName, romName);
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strcat(fileName, ".SAV");
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// create a new folder
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EEPROM_readAnything(0, foldern);
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sprintf(folder, "SMS/SAVE/%s/%d", romName, foldern);
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sd.mkdir(folder, true);
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sd.chdir(folder);
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display_Clear();
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print_Msg(F("Saving to "));
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print_Msg(folder);
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println_Msg(F("/..."));
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display_Update();
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// write new folder number back to eeprom
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foldern = foldern + 1;
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EEPROM_writeAnything(0, foldern);
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// Open file on sd card
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if (!myFile.open(fileName, O_RDWR | O_CREAT)) {
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print_Error(F("SD Error"), true);
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}
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// Write the whole 32KB
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// When there is only 8KB of SRAM, the contents should be duplicated
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word bankSize = 16 * 1024UL;
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for (byte currBank = 0x0; currBank < 2; currBank++) {
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writeByte_SMS(0xFFFC, 0x08 | (currBank << 2));
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// Blink led
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PORTB ^= (1 << 4);
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// Read 16KB from slot 2 which starts at 0x8000
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for (word currBuffer = 0; currBuffer < bankSize; currBuffer += 512) {
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// Fill SD buffer
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for (int currByte = 0; currByte < 512; currByte++) {
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sdBuffer[currByte] = readByte_SMS(0x8000 + currBuffer + currByte);
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}
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myFile.write(sdBuffer, 512);
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}
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}
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// Close the file:
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myFile.close();
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}
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void writeSRAM_SMS() {
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display_Clear();
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if (false) {
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print_Error(F("DISABLED"), false);
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}
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else {
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fileBrowser(F("Select file"));
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sd.chdir();
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sprintf(filePath, "%s/%s", filePath, fileName);
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display_Clear();
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println_Msg(F("Restoring from "));
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println_Msg(filePath);
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println_Msg(fileName);
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display_Update();
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if (myFile.open(filePath, O_READ)) {
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// Get SRAM size from file, with a maximum of 32KB
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uint32_t sramSize = myFile.fileSize();
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if (sramSize > (32 * 1024)) {
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sramSize = 32 * 1024;
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}
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print_Msg(F("sramSize: "));
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print_Msg(sramSize);
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println_Msg(F(""));
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word bankSize = 16 * 1024;
|
|
for (word address = 0x0; address < sramSize; address += 512) {
|
|
byte currBank = address >= bankSize ? 1 : 0;
|
|
word page_address = address - (currBank * bankSize);
|
|
writeByte_SMS(0xFFFC, 0x08 | (currBank << 2));
|
|
// Blink led
|
|
PORTB ^= (1 << 4);
|
|
myFile.read(sdBuffer, 512);
|
|
for (int x = 0; x < 512; x++) {
|
|
writeByte_SMS(0x8000 + page_address + x, sdBuffer[x]);
|
|
}
|
|
}
|
|
myFile.close();
|
|
|
|
// Blink led
|
|
PORTB ^= (1 << 4);
|
|
|
|
println_Msg(F(""));
|
|
println_Msg(F("DONE"));
|
|
display_Update();
|
|
}
|
|
else {
|
|
print_Error(F("SD ERROR"), true);
|
|
}
|
|
}
|
|
|
|
display_Clear();
|
|
|
|
sd.chdir(); // root
|
|
filePath[0] = '\0'; // Reset filePath
|
|
}
|
|
#endif
|
|
|
|
//******************************************
|
|
// End of File
|
|
//******************************************
|