source/src/vm/gamegear/mastersystem.cpp

   1 /*
   2         SEGA MASTER SYSTEM Emulator 'yaMASTER SYSTEM'
   3
   4         Author : tanam
   5         Date   : 2013.10.20-
   6
   7         [ virtual machine ]
   8 */
   9
  10 #include "mastersystem.h"
  11 #include "../../emu.h"
  12 #include "../device.h"
  13 #include "../event.h"
  14
  15 ///#include "../datarec.h"
  16 ///#include "../disk.h"
  17 ///#include "../i8251.h"
  18 #include "../i8255.h"
  19 #include "../io.h"
  20 #include "../ym2413.h"
  21 #include "../sn76489an.h"
  22 #include "../315-5124.h"
  23 ///#include "../upd765a.h"
  24 #include "../z80.h"
  25
  26 #ifdef USE_DEBUGGER
  27 #include "../debugger.h"
  28 #endif
  29
  30 #include "keyboard.h"
  31 #include "memory.h"
  32 #include "system.h"
  33
  34 // ----------------------------------------------------------------------------
  35 // initialize
  36 // ----------------------------------------------------------------------------
  37
  38 VM::VM(EMU* parent_emu) : emu(parent_emu)
  39 {
  40         // create devices
  41         first_device = last_device = NULL;
  42         dummy = new DEVICE(this, emu);  // must be 1st device
  43         event = new EVENT(this, emu);   // must be 2nd device
  44
  45 ///     drec = new DATAREC(this, emu);
  46 ///     sio = new I8251(this, emu);
  47         pio_k = new I8255(this, emu);
  48         pio_f = new I8255(this, emu);
  49         io = new IO(this, emu);
  50         psg = new SN76489AN(this, emu);
  51         fm = new YM2413(this, emu);
  52         vdp = new _315_5124(this, emu);
  53 ///     fdc = new UPD765A(this, emu);
  54         cpu = new Z80(this, emu);
  55
  56         key = new KEYBOARD(this, emu);
  57         memory = new MEMORY(this, emu);
  58         system = new SYSTEM(this, emu);
  59
  60         // set contexts
  61         event->set_context_cpu(cpu);
  62         event->set_context_sound(psg);
  63         event->set_context_sound(fm);
  64
  65 ///     drec->set_context_ear(pio_k, SIG_I8255_PORT_B, 0x80);
  66         pio_k->set_context_port_c(key, SIG_KEYBOARD_COLUMN, 0x07, 0);
  67 ///     pio_k->set_context_port_c(drec, SIG_DATAREC_REMOTE, 0x08, 0);
  68 ///     pio_k->set_context_port_c(drec, SIG_DATAREC_MIC, 0x10, 0);
  69 ///     pio_f->set_context_port_c(fdc, SIG_UPD765A_MOTOR_NEG, 2, 0);
  70 ///     pio_f->set_context_port_c(fdc, SIG_UPD765A_TC, 4, 0);
  71 ///     pio_f->set_context_port_c(fdc, SIG_UPD765A_RESET, 8, 0);
  72         pio_f->set_context_port_c(memory, SIG_MEMORY_SEL, 0x40, 0);
  73         vdp->set_context_irq(cpu, SIG_CPU_IRQ, 1);
  74 ///     fdc->set_context_irq(pio_f, SIG_I8255_PORT_A, 1);
  75 ///     fdc->set_context_index(pio_f, SIG_I8255_PORT_A, 4);
  76
  77         key->set_context_cpu(cpu);
  78         key->set_context_pio(pio_k);
  79         system->set_context_key(key);
  80         vdp->set_context_key(key);
  81         vdp->set_context_psg(psg);
  82 ///     vdp->set_context_cpu(cpu);
  83
  84         // cpu bus
  85         cpu->set_context_mem(memory);
  86         cpu->set_context_io(io);
  87         cpu->set_context_intr(system);
  88 #ifdef USE_DEBUGGER
  89         cpu->set_context_debugger(new DEBUGGER(this, emu));
  90 #endif
  91
  92         // i/o bus
  93         io->set_iomap_single_r(0x00, system);           // GG  START
  94         io->set_iomap_single_w(0x80, system);           // COL TENKEY
  95         io->set_iomap_single_w(0xc0, system);           // COL JOYPAD
  96         io->set_iomap_range_rw(0xfc, 0xfe, system);     // COL JOYPAD
  97         io->set_iomap_range_rw(0xff, 0xff, psg);        // COL PSG
  98         io->set_iomap_range_rw(0x7e, 0x7f, vdp);        // SG  VDP
  99         io->set_iomap_range_rw(0xbe, 0xbf, vdp);        // SG  VDP
 100         io->set_iomap_range_rw(0xdc, 0xdf, pio_k);      // SG  KEY
 101 ///     io->set_iomap_range_rw(0xe0, 0xe3, fdc);        // SG  FDD
 102 ///     io->set_iomap_range_rw(0xe4, 0xe7, pio_f);      // SG  FDD
 103 ///     io->set_iomap_range_rw(0xe8, 0xe9, sio);        // SG  SERIAL
 104         io->set_iomap_range_rw(0xf0, 0xf2, fm);         // MS  FM
 105
 106         // initialize all devices
 107         for(DEVICE* device = first_device; device; device = device->next_device) {
 108                 device->initialize();
 109         }
 110
 111         // BIOS
 112 ///     memory->bios();
 113         memory->open_cart(create_local_path(_T("SMS.ROM")));
 114 ///     for(int i = 0; i < 4; i++) {
 115 ///             fdc->set_drive_type(i, DRIVE_TYPE_2D);
 116 ///     }
 117 }
 118
 119 VM::~VM()
 120 {
 121         // delete all devices
 122         for(DEVICE* device = first_device; device;) {
 123                 DEVICE *next_device = device->next_device;
 124                 device->release();
 125                 delete device;
 126                 device = next_device;
 127         }
 128 }
 129
 130 DEVICE* VM::get_device(int id)
 131 {
 132         for(DEVICE* device = first_device; device; device = device->next_device) {
 133                 if(device->this_device_id == id) {
 134                         return device;
 135                 }
 136         }
 137         return NULL;
 138 }
 139
 140 // ----------------------------------------------------------------------------
 141 // drive virtual machine
 142 // ----------------------------------------------------------------------------
 143
 144 void VM::reset()
 145 {
 146         // reset all devices
 147         for(DEVICE* device = first_device; device; device = device->next_device) {
 148                 device->reset();
 149         }
 150 }
 151
 152 void VM::run()
 153 {
 154         event->drive();
 155 }
 156
 157 // ----------------------------------------------------------------------------
 158 // debugger
 159 // ----------------------------------------------------------------------------
 160
 161 #ifdef USE_DEBUGGER
 162 DEVICE *VM::get_cpu(int index)
 163 {
 164         if(index == 0) {
 165                 return cpu;
 166         }
 167         return NULL;
 168 }
 169 #endif
 170
 171 // ----------------------------------------------------------------------------
 172 // draw screen
 173 // ----------------------------------------------------------------------------
 174
 175 void VM::draw_screen()
 176 {
 177         vdp->draw_screen();
 178 }
 179
 180 ///int VM::access_lamp()
 181 ///{
 182 ///     uint32 status = fdc->read_signal(0);
 183 ///     return (status & (1 | 4)) ? 1 : (status & (2 | 8)) ? 2 : 0;
 184 ///}
 185
 186 // ----------------------------------------------------------------------------
 187 // soud manager
 188 // ----------------------------------------------------------------------------
 189
 190 void VM::initialize_sound(int rate, int samples)
 191 {
 192         // init sound manager
 193         event->initialize_sound(rate, samples);
 194
 195         // init sound gen
 196         psg->init(rate, 3579545, 4000);
 197         fm->init(rate, 3579545, samples);
 198 }
 199
 200 uint16* VM::create_sound(int* extra_frames)
 201 {
 202         return event->create_sound(extra_frames);
 203 }
 204
 205 int VM::sound_buffer_ptr()
 206 {
 207         return event->sound_buffer_ptr();
 208 }
 209
 210 // ----------------------------------------------------------------------------
 211 // user interface
 212 // ----------------------------------------------------------------------------
 213
 214 void VM::open_cart(int drv, const _TCHAR* file_path)
 215 {
 216         if(drv == 0) {
 217                 memory->open_cart(file_path);
 218                 if (strstr(file_path, ".col") ||
 219                         strstr(file_path, ".COL")) {
 220                                 vdp->set_context_irq(cpu, SIG_CPU_NMI, 1);
 221                                 vdp->set_console(0x00);
 222                                 memory->bios();
 223                 } else {
 224                         vdp->set_context_irq(cpu, SIG_CPU_IRQ, 1);
 225                         if (strstr(file_path, ".gg") ||
 226                                 strstr(file_path, ".GG")) vdp->set_console(0x40);
 227                         else
 228                                 vdp->set_console(0x20);
 229                 }
 230                 reset();
 231         }
 232 }
 233
 234 void VM::close_cart(int drv)
 235 {
 236         if(drv == 0) {
 237                 memory->close_cart();
 238                 reset();
 239         }
 240 }
 241
 242 bool VM::cart_inserted(int drv)
 243 {
 244         if(drv == 0) {
 245                 return memory->cart_inserted();
 246         } else {
 247                 return false;
 248         }
 249 }
 250
 251 ///void VM::open_disk(int drv, const _TCHAR* file_path, int bank)
 252 ///{
 253 ///     fdc->open_disk(drv, file_path, bank);
 254 ///}
 255
 256 ///void VM::close_disk(int drv)
 257 ///{
 258 ///     fdc->close_disk(drv);
 259 ///}
 260
 261 ///bool VM::disk_inserted(int drv)
 262 ///{
 263 ///     return fdc->disk_inserted(drv);
 264 ///}
 265
 266 ///void VM::set_disk_protected(int drv, bool value)
 267 ///{
 268 ///     fdc->set_disk_protected(drv, value);
 269 ///}
 270
 271 ///bool VM::get_disk_protected(int drv)
 272 ///{
 273 ///     return fdc->get_disk_protected(drv);
 274 ///}
 275
 276 ///void VM::play_tape(const _TCHAR* file_path)
 277 ///{
 278 ///     drec->play_tape(file_path);
 279 ///}
 280
 281 ///void VM::rec_tape(const _TCHAR* file_path)
 282 ///{
 283 ///     drec->rec_tape(file_path);
 284 ///}
 285
 286 ///void VM::close_tape()
 287 ///{
 288 ///     drec->close_tape();
 289 ///}
 290
 291 ///bool VM::tape_inserted()
 292 ///{
 293 ///     return drec->tape_inserted();
 294 ///}
 295
 296 ///bool VM::tape_playing()
 297 ///{
 298 ///     return drec->tape_playing();
 299 ///}
 300
 301 ///bool VM::tape_recording()
 302 ///{
 303 ///     return drec->tape_recording();
 304 ///}
 305
 306 ///int VM::tape_position()
 307 ///{
 308 ///     return drec->tape_position();
 309 ///}
 310
 311 bool VM::now_skip()
 312 {
 313         return event->now_skip();
 314 }
 315
 316 void VM::update_config()
 317 {
 318         for(DEVICE* device = first_device; device; device = device->next_device) {
 319                 device->update_config();
 320         }
 321 }