mirror of
https://github.com/sanni/cartreader.git
synced 2024-11-15 01:15:06 +01:00
327 lines
7.6 KiB
C++
327 lines
7.6 KiB
C++
//******************************************
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// RCA STUDIO II MODULE
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//******************************************
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#ifdef ENABLE_RCA
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// RCA Studio II
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// Cartridge Pinout
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// 22P 3.96mm pitch connector
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//
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// FRONT
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// +-------+
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// D7 -| 1 |
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// D6 -| 2 |
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// D5 -| 3 |
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// D4 -| 4 |
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// D3 -| 5 |
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// ROM_DISABLE -| 6 |
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// GND -| 7 |
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// D2 -| 8 |
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// D1 -| 9 |
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// D0 -| 10 |
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// A0 -| 11 |
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// A1 -| 12 |
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// A2 -| 13 |
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// A3 -| 14 |
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// VCC(+5V) -| 15 |
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// A4 -| 16 |
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// A5 -| 17 |
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// A6 -| 18 |
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// TPA -| 19 |
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// A7 -| 20 |
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// /MRD -| 21 |
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// ROMCS -| 22 |
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// +-------+
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//
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// BACK SIDE
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// +-------------------------------------------------------------------------------------------+
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// LEFT | | RIGHT
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// | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 |
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// +-------------------------------------------------------------------------------------------+
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// D7 D6 D5 D4 D3 DIS GND D2 D1 D0 A0 A1 A2 A3 +5V A4 A5 A6 TPA A7 /MRD CS
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//
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// FRONT SIDE
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// CONTROL PINS:
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// /MRD(PH3) - SNES /CS
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// TPA(PH6) - SNES /RD
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//******************************************
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// VARIABLES
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//******************************************
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byte RCA[] = {1,2};
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byte rcalo = 0; // Lowest Entry
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byte rcahi = 1; // Highest Entry
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byte rcasize;
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byte newrcasize;
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// EEPROM MAPPING
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// 08 ROM SIZE
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//******************************************
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// MENU
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//******************************************
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// Base Menu
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static const char* const menuOptionsRCA[] PROGMEM = { FSTRING_SELECT_CART, FSTRING_READ_ROM, FSTRING_SET_SIZE, FSTRING_RESET };
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void rcaMenu()
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{
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convertPgm(menuOptionsRCA, 4);
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uint8_t mainMenu = question_box(F("RCA STUDIO II MENU"), menuOptions, 4, 0);
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switch (mainMenu)
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{
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case 0:
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// Select Cart
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setCart_RCA();
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setup_RCA();
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break;
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case 1:
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// Read ROM
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sd.chdir("/");
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readROM_RCA();
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sd.chdir("/");
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break;
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case 2:
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// Set Size
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setROMSize_RCA();
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break;
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case 3:
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// reset
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resetArduino();
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break;
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}
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}
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//******************************************
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// SETUP
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//******************************************
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void setup_RCA()
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{
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// Request 5V
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setVoltage(VOLTS_SET_5V);
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// Set Address Pins to Output
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// RCA Studio II uses A0-A7 [A8-A23 UNUSED]
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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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//A16-A23
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DDRL = 0xFF;
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// Set Control Pins to Output
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// ---(PH0) ---(PH1) /MRD(PH3) ---(PH4) ---(PH5) TPA(PH6)
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DDRH |= (1 << 0) | (1 << 1) | (1 << 3) | (1 << 4) | (1 << 5) | (1 << 6);
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// Set TIME(PJ0) to Output (UNUSED)
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DDRJ |= (1 << 0);
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// Set Pins (D0-D7) to Input
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DDRC = 0x00;
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// Setting Control Pins to HIGH
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// ---(PH0) ---(PH1) /MRD(PH3) ---(PH4) ---(PH5) TPA(PH6)
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PORTH |= (1 << 0) | (1 << 1) | (1 << 3) | (1 << 4) | (1 << 5) | (1 << 6);
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// Set Unused Data Pins (PA0-PA7) to Output
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DDRA = 0xFF;
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// Set Unused Pins HIGH
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PORTA = 0xFF;
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PORTK = 0xFF; // A8-A15
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PORTL = 0xFF; // A16-A23
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PORTJ |= (1 << 0); // TIME(PJ0)
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checkStatus_RCA();
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strcpy(romName, "RCA");
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mode = CORE_RCA;
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}
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//******************************************
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// READ FUNCTIONS
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//******************************************
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uint8_t readData_RCA(uint16_t addr)
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{
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// Setup TPA + /MRD
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PORTH &= ~(1 << 6); // TPA LOW
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delayMicroseconds(4);
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PORTH |= (1 << 3); // /MRD HIGH;
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delayMicroseconds(4);
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// Set HIGH Address
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PORTF = (addr >> 8) & 0xFF;
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delayMicroseconds(4);
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// Latch HIGH Address
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PORTH |= (1 << 6); // TPA HIGH
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delayMicroseconds(4);
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PORTH &= ~(1 << 3); // /MRD LOW
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delayMicroseconds(4);
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// Switch TPA LOW
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PORTH &= ~(1 << 6); // TPA LOW
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delayMicroseconds(4);
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// Set LOW Address
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PORTF = addr & 0xFF;
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delayMicroseconds(4);
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uint8_t ret = PINC;
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// Reset /MRD
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PORTH |= (1 << 3); // /MRD HIGH;
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return ret;
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}
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void readSegment_RCA(uint16_t startaddr, uint16_t endaddr)
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{
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for (uint16_t addr = startaddr; addr < endaddr; addr += 512) {
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for (int w = 0; w < 512; w++) {
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uint8_t temp = readData_RCA(addr + w);
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sdBuffer[w] = temp;
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}
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myFile.write(sdBuffer, 512);
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}
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}
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//******************************************
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// READ ROM
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//******************************************
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void readROM_RCA()
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{
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createFolderAndOpenFile("RCA", "ROM", romName, "bin");
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readSegment_RCA(0x0400,0x0600); // 512B
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if (rcasize > 0)
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readSegment_RCA(0x0600,0x0800); // +512B = 1K
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myFile.close();
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printCRC(fileName, NULL, 0);
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println_Msg(FS(FSTRING_EMPTY));
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print_STR(press_button_STR, 1);
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display_Update();
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wait();
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}
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//******************************************
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// ROM SIZE
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//******************************************
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#if (defined(ENABLE_OLED) || defined(ENABLE_LCD))
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void printRomSize_RCA(int index)
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{
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display_Clear();
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print_Msg(FS(FSTRING_ROM_SIZE));
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println_Msg(RCA[index]);
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}
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#endif
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void setROMSize_RCA()
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{
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byte newrcasize;
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#if (defined(ENABLE_OLED) || defined(ENABLE_LCD))
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display_Clear();
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if (rcalo == rcahi)
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newrcasize = rcalo;
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else {
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newrcasize = navigateMenu(rcalo, rcahi, &printRomSize_RCA);
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display.setCursor(0, 56); // Display selection at bottom
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}
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print_Msg(FS(FSTRING_ROM_SIZE));
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print_Msg(RCA[newrcasize]);
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println_Msg(F("KB"));
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display_Update();
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delay(1000);
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#else
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if (rcalo == rcahi)
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newrcasize = rcalo;
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else {
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setrom:
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String sizeROM;
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for (int i = 0; i < (rcahi - rcalo + 1); i++) {
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Serial.print(F("Select ROM Size: "));
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Serial.print(i);
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Serial.print(F(" = "));
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Serial.print(RCA[i + rcalo]);
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Serial.println(F("KB"));
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}
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Serial.print(F("Enter ROM Size: "));
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while (Serial.available() == 0) {}
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sizeROM = Serial.readStringUntil('\n');
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Serial.println(sizeROM);
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newrcasize = sizeROM.toInt() + rcalo;
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if (newrcasize > rcahi) {
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Serial.println(F("SIZE NOT SUPPORTED"));
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Serial.println(FS(FSTRING_EMPTY));
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goto setrom;
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}
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}
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Serial.print(F("ROM Size = "));
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Serial.print(RCA[newrcasize]);
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Serial.println(F("KB"));
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#endif
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EEPROM_writeAnything(8, newrcasize);
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rcasize = newrcasize;
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}
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void checkStatus_RCA()
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{
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EEPROM_readAnything(8, rcasize);
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if (rcasize > rcahi) {
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rcasize = 1; // default 1024B
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EEPROM_writeAnything(8, rcasize);
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}
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#if (defined(ENABLE_OLED) || defined(ENABLE_LCD))
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display_Clear();
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println_Msg(F("RCA STUDIO II"));
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println_Msg(FS(FSTRING_CURRENT_SETTINGS));
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println_Msg(FS(FSTRING_EMPTY));
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print_Msg(FS(FSTRING_ROM_SIZE));
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print_Msg(RCA[rcasize] * 512);
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println_Msg(F("B"));
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display_Update();
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wait();
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#else
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Serial.print(FS(FSTRING_ROM_SIZE));
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Serial.print(RCA[rcasize] * 512);
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Serial.println(F("B"));
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Serial.println(FS(FSTRING_EMPTY));
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#endif
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}
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//******************************************
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// CART SELECT CODE
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//******************************************
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void setCart_RCA()
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{
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//go to root
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sd.chdir();
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byte gameSize;
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// Select starting letter
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//byte myLetter = starting_letter();
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// Open database
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if (myFile.open("rcacart.txt", O_READ)) {
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// seek_first_letter_in_database(myFile, myLetter);
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if(checkCartSelection(myFile, &readDataLineSingleDigit, &gameSize)) {
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EEPROM_writeAnything(8, gameSize);
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}
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} else {
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print_FatalError(FS(FSTRING_DATABASE_FILE_NOT_FOUND));
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}
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}
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#endif |