mirror of
https://github.com/sanni/cartreader.git
synced 2024-11-15 01:15:06 +01:00
374 lines
8.8 KiB
C++
374 lines
8.8 KiB
C++
//******************************************
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// MAGNAVOX ODYSSEY 2 MODULE
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//******************************************
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#if defined(ENABLE_ODY2)
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// Magnavox Odyssey 2
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// Philips Videopac/Videopac+
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// Cartridge Pinout
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// 30P 3.96mm pitch connector
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//
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// FRONT BACK
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// SIDE SIDE
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// +------+
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// T0 -| 1 A |- /WR
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// D0 -| 2 B |- GND
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// D1 -| 3 C |- GND
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// D2 -| 4 D |- VCC (+5V)
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// D3 -| 5 E |- CS3
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// D4 -| 6 F |- /PSEN (/CE)
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// D5 -| 7 G |- A0
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// D6 -| 8 H |- A1
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// D7 -| 9 J |- A2
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// A10 (P22) -| 10 K |- A3
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// /CS1 (P14) -| 11 L |- A4
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// P11 -| 12 M |- A5
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// P10 -| 13 N |- A7
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// A11 (P23) -| 14 P |- A6
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// A9 (P21) -| 15 R |- A8 (P20)
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// +------+
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//
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// NOTE: ADDRESS A7/A6 PIN ORDER ON PINS N & P.
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// NOTE: MOST CARTS DO NOT CONNECT A10 ON PIN 10.
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//
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// BACK
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// +---------------------------------------------+
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// | A B C D E F G H J K L M N P R |
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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 |
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// +---------------------------------------------+
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// FRONT
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//
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// CONTROL PINS:
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// T0(PH0) - SNES RESET
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// CS3(PH3) - SNES /CS
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// /CS1(PH4) - SNES /IRQ
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// /WR(PH5) - SNES /WR
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// /PSEN(PH6) - SNES /RD
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byte ODY2[] = { 2, 4, 8, 12, 16 };
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byte ody2lo = 0; // Lowest Entry
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byte ody2hi = 4; // Highest Entry
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byte ody2mapper;
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byte ody2size;
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// EEPROM MAPPING
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// 07 MAPPER
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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 menuOptionsODY2[] PROGMEM = { FSTRING_SELECT_CART, FSTRING_READ_ROM, FSTRING_SET_SIZE, FSTRING_RESET };
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void setup_ODY2() {
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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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// Odyssey 2 uses A0-A13 [A14-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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// T0(PH0) ---(PH1) CS3(PH3) /CS1(PH4) /WR(PH5) /RD(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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// T0(PH0) ---(PH1) /CS1(PH4) /WR(PH5) /RD(PH6)
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PORTH |= (1 << 0) | (1 << 1) | (1 << 4) | (1 << 5) | (1 << 6);
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// Set CS3(PH3) to LOW
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PORTH &= ~(1 << 3);
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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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PORTL = 0xFF; // A16-A23
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PORTJ |= (1 << 0); // TIME(PJ0)
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checkStatus_ODY2();
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strcpy(romName, "ODYSSEY2");
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mode = CORE_ODY2;
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}
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void ody2Menu() {
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convertPgm(menuOptionsODY2, 4);
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uint8_t mainMenu = question_box(F("ODYSSEY 2 MENU"), menuOptions, 4, 0);
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switch (mainMenu) {
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case 0:
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// Select Cart
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setCart_ODY2();
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setup_ODY2();
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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_ODY2();
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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_ODY2();
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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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// READ CODE
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//******************************************
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uint8_t readData_ODY2(uint16_t addr) {
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PORTF = addr & 0xFF; // A0-A7
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PORTK = (addr >> 8) & 0xFF; // A8-A13
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// Set /PSEN (/CE) to LOW
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PORTH &= ~(1 << 6); // /PSEN LOW (ENABLE)
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NOP;
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NOP;
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NOP;
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NOP;
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NOP;
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uint8_t ret = PINC;
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// Pull /PSEN (/CE) to HIGH
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PORTH |= (1 << 6); // /PSEN HIGH (DISABLE)
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return ret;
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}
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void readSegment_ODY2(uint16_t startaddr, uint16_t endaddr) {
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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_ODY2(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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void bankSwitch_ODY2(uint16_t addr, uint8_t data) {
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PORTF = addr & 0xFF; // A0-A7
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PORTK = (addr >> 8) & 0xFF; // A8-A13
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NOP;
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NOP;
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NOP;
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NOP;
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NOP;
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// Set /CS1(PH4) to LOW
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PORTH &= ~(1 << 4);
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// Set /WR(PH5) to LOW
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PORTH &= ~(1 << 5);
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NOP;
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NOP;
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NOP;
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NOP;
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NOP;
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DDRC = 0xFF; // Set to Output
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NOP;
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NOP;
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NOP;
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NOP;
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NOP;
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PORTC = data;
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NOP;
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NOP;
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NOP;
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NOP;
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NOP;
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// Set /WR(PH5) to HIGH
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PORTH |= (1 << 5);
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// Set /CS1(PH4) to HIGH
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PORTH |= (1 << 4);
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DDRC = 0x00; // Reset to Input
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}
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void readROM_ODY2() {
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createFolderAndOpenFile("ODY2", "ROM", romName, "bin");
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if (ody2mapper == 1) { // A10 CONNECTED
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// Videopac 31: Musician
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// Videopac 40: 4 in 1 Row/4 en 1 Ligne
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readSegment_ODY2(0x0000, 0x1000); // 4K
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}
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// A10 NOT CONNECTED
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else if (ody2size > 2) { // 12K/16K (BANKSWITCH)
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// Videopac+ 55: Neutron Star 12K = 2K x 6 Banks
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// Videopac+ 58: Norseman 12K = 2K x 6 Banks
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// Videopac+ 59: Helicopter Rescue 16K = 2K x 8 Banks
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// Videopac+ 60: Trans American Rally 16K = 2K x 8 Banks
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uint8_t ody2banks = (ody2size * 4) / 2;
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for (int x = (ody2banks - 1); x >= 0; x--) {
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bankSwitch_ODY2(0x80, ~x);
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readSegment_ODY2(0x0400, 0x0C00); // 2K x 6/8 = 12K/16K
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}
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} else { // STANDARD SIZES
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readSegment_ODY2(0x0400, 0x0C00); // 2K
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if (ody2size > 0) {
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readSegment_ODY2(0x1400, 0x1C00); // +2K = 4K
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if (ody2size > 1) {
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readSegment_ODY2(0x2400, 0x2C00); // +2K = 6K
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readSegment_ODY2(0x3400, 0x3C00); // +2K = 8K
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}
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}
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}
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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_ODY2(int index) {
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display_Clear();
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print_Msg(F("ROM Size: "));
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println_Msg(ODY2[index]);
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}
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#endif
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void setROMSize_ODY2() {
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byte newody2size;
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#if (defined(ENABLE_OLED) || defined(ENABLE_LCD))
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display_Clear();
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if (ody2lo == ody2hi)
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newody2size = ody2lo;
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else {
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newody2size = navigateMenu(ody2lo, ody2hi, &printRomSize_ODY2);
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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(ODY2[newody2size]);
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println_Msg(F("K"));
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display_Update();
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delay(1000);
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#else
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if (ody2lo == ody2hi)
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newody2size = ody2lo;
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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 < (ody2hi - ody2lo + 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(ODY2[i + ody2lo]);
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Serial.println(F("K"));
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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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newody2size = sizeROM.toInt() + ody2lo;
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if (newody2size > ody2hi) {
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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(ODY2[newody2size]);
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Serial.println(F("K"));
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#endif
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EEPROM_writeAnything(8, newody2size);
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ody2size = newody2size;
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}
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void checkStatus_ODY2() {
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EEPROM_readAnything(7, ody2mapper);
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EEPROM_readAnything(8, ody2size);
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if (ody2mapper > 1) {
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ody2mapper = 0;
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EEPROM_writeAnything(7, ody2mapper);
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}
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if (ody2size > 4) {
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ody2size = 0;
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EEPROM_writeAnything(8, ody2size);
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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("ODYSSEY 2 READER"));
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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(F("MAPPER: "));
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println_Msg(ody2mapper);
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print_Msg(FS(FSTRING_ROM_SIZE));
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print_Msg(ODY2[ody2size]);
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println_Msg(F("K"));
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display_Update();
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wait();
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#else
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Serial.print(F("CURRENT MAPPER: "));
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Serial.println(ody2mapper);
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Serial.print(F("CURRENT ROM SIZE: "));
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Serial.print(ODY2[ody2size]);
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Serial.println(F("K"));
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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_ODY2() {
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//go to root
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sd.chdir();
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struct database_entry_mapper_size entry;
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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("ody2cart.txt", O_READ)) {
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seek_first_letter_in_database(myFile, myLetter);
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if(checkCartSelection(myFile, &readDataLineMapperSize, &entry)) {
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EEPROM_writeAnything(7, entry.gameMapper);
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EEPROM_writeAnything(8, entry.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
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//******************************************
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// End of File
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//******************************************
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