mirror of
https://github.com/devinacker/bsnes-plus.git
synced 2025-04-02 10:52:46 -04:00
cba7d05f72
fixed bug where floppy data buffer from previous session would be saved to next session's floppy buffer when cartridge loaded. added xml parsing option for remapping dos added FDC_RESET_STANDBY debugging output, however standby and clock functionality are not implemented yet. added debugging output detecting whether a floppy disk image already exists for a current rom, and creates a new disk only if one doesn't exist.
142 lines
3.8 KiB
C++
142 lines
3.8 KiB
C++
#ifdef DOS_CPP
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DOS dos;
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DOS::DOS() {
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}
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DOS::~DOS() {
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}
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void DOS::init() {
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serial.init();
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floppy.init();
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}
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void DOS::enable() {
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// terrible hack to patch the NMI and IRQ vectors in the standard
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// SFX-DOS ROM, since they normally have bogus addresses for some reason
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if (memory::cartrom.size() == 0x8000
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&& memory::cartrom[0x7FEA] == 0x10 && memory::cartrom[0x7FEB] == 0x01
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&& memory::cartrom[0x7FEE] == 0x14 && memory::cartrom[0x7FEF] == 0x01) {
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uint8 *cartrom = memory::cartrom.data();
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// patch NMI
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cartrom[0x7FEA] = 0x22;
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cartrom[0x7FEB] = 0xE1;
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// patch IRQ
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cartrom[0x7FEE] = 0x46;
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cartrom[0x7FEF] = 0xE1;
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}
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}
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void DOS::power() {
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serial.power();
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floppy.power();
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}
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void DOS::reset() {
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serial.reset();
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floppy.reset();
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}
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void DOS::unload() {
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serial.unload();
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floppy.unload();
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}
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uint8 DOS::read(unsigned addr) {
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if(!Memory::debugger_access())
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cpu.synchronize_coprocessor();
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else return cpu.regs.mdr;
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switch ((addr & 0x30) >> 4) {
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case 0: // serial controller (keyboard, RS-232)
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return serial.read(addr & 3);
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case 1: // parallel controller (printer) (TODO)
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return 0;
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case 2: // floppy disk controller
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return floppy.read(addr & 1);
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case 3: // floppy disk controller, terminal count
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floppy.terminate();
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break;
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}
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return cpu.regs.mdr;
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}
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void DOS::write(unsigned addr, uint8 data) {
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if(!Memory::debugger_access())
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cpu.synchronize_coprocessor();
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else return;
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switch ((addr & 0x30) >> 4) {
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case 0: // serial controller (keyboard, RS-232)
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serial.write(addr & 3, data);
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break;
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case 1: // parallel controller (printer) (TODO)
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break;
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case 2: // floppy disk controller
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floppy.write(addr & 1, data);
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break;
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case 3: // floppy disk controller, terminal count
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floppy.terminate();
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break;
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}
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}
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static int scancode_table[] = {
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//Escape, F1, F2, F3, F4, F5, F6, F7, F8, F9, F10, F11, F12,
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0x00, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
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//PrintScreen, ScrollLock, Pause, Tilde,
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-1, -1, -1, -1,
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//Num1, Num2, Num3, Num4, Num5, Num6, Num7, Num8, Num9, Num0,
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0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a,
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//Dash, Equal, Backspace,
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0x0b, 0x4d, 0x0e,
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//Insert, Delete, Home, End, PageUp, PageDown,
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-1, 0x39, -1, -1, -1, -1,
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//A, B, C, D, E, F, G, H, I, J, K, L, M,
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0x1d, 0x2d, 0x2b, 0x1f, 0x12, 0x20, 0x21, 0x22, 0x17, 0x23, 0x24, 0x25, 0x2f,
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//N, O, P, Q, R, S, T, U, V, W, X, Y, Z,
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0x2e, 0x18, 0x19, 0x10, 0x13, 0x1e, 0x14, 0x16, 0x2c, 0x11, 0x2a, 0x15, 0x29,
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//LeftBracket, RightBracket, Backslash, Semicolon, Apostrophe, Comma, Period, Slash,
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// ^- (actually sends ':' here instead)
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0x1b, 0x28, 0x0d, 0x26, 0x27, 0x30, 0x31, 0x32,
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//Keypad1, Keypad2, Keypad3, Keypad4, Keypad5, Keypad6, Keypad7, Keypad8, Keypad9, Keypad0,
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0x4a, 0x4b, 0x4c, 0x46, 0x47, 0x48, 0x42, 0x43, 0x44, 0x4e,
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//Point, Enter, Add, Subtract, Multiply, Divide,
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0x50, 0x1c, 0x49, 0x40, 0x45, 0x41,
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//NumLock, CapsLock,
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-1, -1,
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//Up, Down, Left, Right,
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0x3a, 0x3d, 0x3b, 0x3c,
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//Tab, Return, Spacebar, Menu,
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0x0f, 0x1c, 0x34, -1,
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//Shift, Control, Alt, Super,
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0x70, 0x74, -1, -1,
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};
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void DOS::send_key(unsigned scancode, bool on) {
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if (scancode < sizeof(scancode_table)
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&& scancode_table[scancode] != -1) {
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// map application keystroke to PC-9801 keyboard scan code
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uint8 key = scancode_table[scancode];
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if (on) serial.send_data(0, key);
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else serial.send_data(0, key | 0x80);
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}
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}
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void DOS::irq_process() {
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cpu.regs.irq = (serial.irq_enable && serial.irq_status())
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|| floppy.irq_status();
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}
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#endif
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