source/src/vm/gamegear/gamegear.cpp

   1 /*
   2         SEGA GAME GEAR Emulator 'yaGAME GEAR'
   3
   4         Author : tanam
   5         Date   : 2013.08.24-
   6
   7         [ virtual machine ]
   8 */
   9
  10 #include "gamegear.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 "../noise.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         dummy->set_device_name(_T("1st Dummy"));
  45
  46         drec = new DATAREC(this, emu);
  47         drec->set_context_noise_play(new NOISE(this, emu));
  48         drec->set_context_noise_stop(new NOISE(this, emu));
  49         drec->set_context_noise_fast(new NOISE(this, emu));
  50         sio = new I8251(this, emu);
  51         pio_k = new I8255(this, emu);
  52         pio_k->set_device_name(_T("8255 PIO (Keyboard)"));
  53         pio_f = new I8255(this, emu);
  54         pio_f->set_device_name(_T("8255 PIO (Floppy I/F)"));
  55         io = new IO(this, emu);
  56         psg = new SN76489AN(this, emu);
  57         vdp = new _315_5124(this, emu);
  58         fdc = new UPD765A(this, emu);
  59         fdc->set_context_noise_seek(new NOISE(this, emu));
  60         fdc->set_context_noise_head_down(new NOISE(this, emu));
  61         fdc->set_context_noise_head_up(new NOISE(this, emu));
  62         cpu = new Z80(this, emu);
  63
  64         key = new KEYBOARD(this, emu);
  65         memory = new MEMORY(this, emu);
  66         system = new SYSTEM(this, emu);
  67         // set contexts
  68         event->set_context_cpu(cpu);
  69         event->set_context_sound(psg);
  70         event->set_context_sound(drec);
  71         event->set_context_sound(fdc->get_context_noise_seek());
  72         event->set_context_sound(fdc->get_context_noise_head_down());
  73         event->set_context_sound(fdc->get_context_noise_head_up());
  74         event->set_context_sound(drec->get_context_noise_play());
  75         event->set_context_sound(drec->get_context_noise_stop());
  76         event->set_context_sound(drec->get_context_noise_fast());
  77
  78         drec->set_context_ear(pio_k, SIG_I8255_PORT_B, 0x80);
  79         pio_k->set_context_port_c(key, SIG_KEYBOARD_COLUMN, 0x07, 0);
  80         pio_k->set_context_port_c(drec, SIG_DATAREC_REMOTE, 0x08, 0);
  81         pio_k->set_context_port_c(drec, SIG_DATAREC_MIC, 0x10, 0);
  82         pio_f->set_context_port_c(fdc, SIG_UPD765A_MOTOR_NEG, 2, 0);
  83         pio_f->set_context_port_c(fdc, SIG_UPD765A_TC, 4, 0);
  84         pio_f->set_context_port_c(fdc, SIG_UPD765A_RESET, 8, 0);
  85         pio_f->set_context_port_c(memory, SIG_MEMORY_SEL, 0x40, 0);
  86         fdc->set_context_irq(pio_f, SIG_I8255_PORT_A, 1);
  87         fdc->set_context_index(pio_f, SIG_I8255_PORT_A, 4);
  88
  89         key->set_context_cpu(cpu);
  90         key->set_context_pio(pio_k);
  91         system->set_context_key(key);
  92         vdp->set_context_psg(psg);
  93         vdp->set_context_key(key);
  94 ///     vdp->set_context_cpu(cpu);
  95
  96         // cpu bus
  97         cpu->set_context_mem(memory);
  98         cpu->set_context_io(io);
  99         cpu->set_context_intr(system);
 100 #ifdef USE_DEBUGGER
 101         cpu->set_context_debugger(new DEBUGGER(this, emu));
 102 #endif
 103
 104         // i/o bus
 105         io->set_iomap_range_rw(0x00, 0x06, system);     // GG  START
 106         io->set_iomap_single_w(0x80, system);           // COL TENKEY
 107         io->set_iomap_single_w(0xc0, system);           // COL JOYPAD
 108         io->set_iomap_range_rw(0xfc, 0xfe, system);     // COL JOYPAD
 109         io->set_iomap_range_rw(0xff, 0xff, psg);        // COL PSG
 110         io->set_iomap_range_rw(0x7e, 0x7f, vdp);        // SG  VDP
 111         io->set_iomap_range_rw(0xbe, 0xbf, vdp);        // SG  VDP
 112         io->set_iomap_range_rw(0xdc, 0xdf, pio_k);      // SG  KEY
 113         io->set_iomap_range_rw(0xe0, 0xe3, fdc);        // SG  FDD
 114         io->set_iomap_range_rw(0xe4, 0xe7, pio_f);      // SG  FDD
 115         io->set_iomap_range_rw(0xe8, 0xe9, sio);        // SG  SERIAL
 116
 117         // initialize all devices
 118         for(DEVICE* device = first_device; device; device = device->next_device) {
 119                 device->initialize();
 120         }
 121
 122         // BIOS
 123         memory->bios();
 124
 125         for(int i = 0; i < 4; i++) {
 126                 fdc->set_drive_type(i, DRIVE_TYPE_2D);
 127         }
 128 }
 129
 130 VM::~VM()
 131 {
 132         // delete all devices
 133         for(DEVICE* device = first_device; device;) {
 134                 DEVICE *next_device = device->next_device;
 135                 device->release();
 136                 delete device;
 137                 device = next_device;
 138         }
 139 }
 140
 141 DEVICE* VM::get_device(int id)
 142 {
 143         for(DEVICE* device = first_device; device; device = device->next_device) {
 144                 if(device->this_device_id == id) {
 145                         return device;
 146                 }
 147         }
 148         return NULL;
 149 }
 150
 151 // ----------------------------------------------------------------------------
 152 // drive virtual machine
 153 // ----------------------------------------------------------------------------
 154
 155 void VM::reset()
 156 {
 157         // reset all devices
 158         for(DEVICE* device = first_device; device; device = device->next_device) {
 159                 device->reset();
 160         }
 161 }
 162
 163 void VM::run()
 164 {
 165         event->drive();
 166 }
 167
 168 // ----------------------------------------------------------------------------
 169 // debugger
 170 // ----------------------------------------------------------------------------
 171
 172 #ifdef USE_DEBUGGER
 173 DEVICE *VM::get_cpu(int index)
 174 {
 175         if(index == 0) {
 176                 return cpu;
 177         }
 178         return NULL;
 179 }
 180 #endif
 181
 182 // ----------------------------------------------------------------------------
 183 // draw screen
 184 // ----------------------------------------------------------------------------
 185
 186 void VM::draw_screen()
 187 {
 188         vdp->draw_screen();
 189 }
 190
 191 // ----------------------------------------------------------------------------
 192 // soud manager
 193 // ----------------------------------------------------------------------------
 194
 195 void VM::initialize_sound(int rate, int samples)
 196 {
 197         // init sound manager
 198         event->initialize_sound(rate, samples);
 199
 200         // init sound gen
 201         psg->initialize_sound(rate, 3579545, 4000);
 202 }
 203
 204 uint16_t* VM::create_sound(int* extra_frames)
 205 {
 206         return event->create_sound(extra_frames);
 207 }
 208
 209 int VM::get_sound_buffer_ptr()
 210 {
 211         return event->get_sound_buffer_ptr();
 212 }
 213
 214 #ifdef USE_SOUND_VOLUME
 215 void VM::set_sound_device_volume(int ch, int decibel_l, int decibel_r)
 216 {
 217         if(ch == 0) {
 218                 psg->set_volume(0, decibel_l, decibel_r);
 219         } else if(ch == 1) {
 220                 drec->set_volume(0, decibel_l, decibel_r);
 221         } else if(ch == 2) {
 222                 fdc->get_context_noise_seek()->set_volume(0, decibel_l, decibel_r);
 223                 fdc->get_context_noise_head_down()->set_volume(0, decibel_l, decibel_r);
 224                 fdc->get_context_noise_head_up()->set_volume(0, decibel_l, decibel_r);
 225         } else if(ch == 3) {
 226                 drec->get_context_noise_play()->set_volume(0, decibel_l, decibel_r);
 227                 drec->get_context_noise_stop()->set_volume(0, decibel_l, decibel_r);
 228                 drec->get_context_noise_fast()->set_volume(0, decibel_l, decibel_r);
 229         }
 230 }
 231 #endif
 232
 233 // ----------------------------------------------------------------------------
 234 // user interface
 235 // ----------------------------------------------------------------------------
 236
 237 void VM::open_cart(int drv, const _TCHAR* file_path)
 238 {
 239         if(drv == 0) {
 240                 memory->open_cart(file_path);
 241                 if (check_file_extension(file_path, _T(".col"))) {
 242                         vdp->set_console(0x00);
 243                         vdp->set_context_irq(cpu, SIG_CPU_NMI, 1);
 244                         memory->bios();
 245                 } else {
 246                         vdp->set_context_irq(cpu, SIG_CPU_IRQ, 1);
 247                         if (check_file_extension(file_path, _T(".gg"))) {
 248                                 vdp->set_console(0x40);
 249                         } else {
 250                                 vdp->set_console(0x20);
 251                         }
 252                 }
 253                 reset();
 254         }
 255 }
 256
 257 void VM::close_cart(int drv)
 258 {
 259         if(drv == 0) {
 260                 memory->close_cart();
 261                 reset();
 262         }
 263 }
 264
 265 bool VM::is_cart_inserted(int drv)
 266 {
 267         if(drv == 0) {
 268                 return memory->is_cart_inserted();
 269         } else {
 270                 return false;
 271         }
 272 }
 273
 274 void VM::open_floppy_disk(int drv, const _TCHAR* file_path, int bank)
 275 {
 276         fdc->open_disk(drv, file_path, bank);
 277 }
 278
 279 void VM::close_floppy_disk(int drv)
 280 {
 281         fdc->close_disk(drv);
 282 }
 283
 284 bool VM::is_floppy_disk_inserted(int drv)
 285 {
 286         return fdc->is_disk_inserted(drv);
 287 }
 288
 289 void VM::is_floppy_disk_protected(int drv, bool value)
 290 {
 291         fdc->is_disk_protected(drv, value);
 292 }
 293
 294 bool VM::is_floppy_disk_protected(int drv)
 295 {
 296         return fdc->is_disk_protected(drv);
 297 }
 298
 299 uint32_t VM::is_floppy_disk_accessed()
 300 {
 301         return fdc->read_signal(0);
 302 }
 303
 304 void VM::play_tape(int drv, const _TCHAR* file_path)
 305 {
 306         drec->play_tape(file_path);
 307 //      drec->set_remote(true);
 308 }
 309
 310 void VM::rec_tape(int drv, const _TCHAR* file_path)
 311 {
 312         drec->rec_tape(file_path);
 313 //      drec->set_remote(true);
 314 }
 315
 316 void VM::close_tape(int drv)
 317 {
 318         emu->lock_vm();
 319         drec->close_tape();
 320         emu->unlock_vm();
 321 //      drec->set_remote(false);
 322 }
 323
 324 bool VM::is_tape_inserted(int drv)
 325 {
 326         return drec->is_tape_inserted();
 327 }
 328
 329 bool VM::is_tape_playing(int drv)
 330 {
 331         return drec->is_tape_playing();
 332 }
 333
 334 bool VM::is_tape_recording(int drv)
 335 {
 336         return drec->is_tape_recording();
 337 }
 338
 339 int VM::get_tape_position(int drv)
 340 {
 341         return drec->get_tape_position();
 342 }
 343
 344 const _TCHAR* VM::get_tape_message(int drv)
 345 {
 346         return drec->get_message();
 347 }
 348
 349 void VM::push_play(int drv)
 350 {
 351         drec->set_ff_rew(0);
 352         drec->set_remote(true);
 353 }
 354
 355 void VM::push_stop(int drv)
 356 {
 357         drec->set_remote(false);
 358 }
 359
 360 void VM::push_fast_forward(int drv)
 361 {
 362         drec->set_ff_rew(1);
 363         drec->set_remote(true);
 364 }
 365
 366 void VM::push_fast_rewind(int drv)
 367 {
 368         drec->set_ff_rew(-1);
 369         drec->set_remote(true);
 370 }
 371
 372 bool VM::is_frame_skippable()
 373 {
 374         return event->is_frame_skippable();
 375 }
 376
 377 void VM::update_config()
 378 {
 379         for(DEVICE* device = first_device; device; device = device->next_device) {
 380                 device->update_config();
 381         }
 382 }
 383