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) : VM_TEMPLATE(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 #if defined(__GIT_REPO_VERSION)
 119         strncpy(_git_revision, __GIT_REPO_VERSION, sizeof(_git_revision) - 1);
 120 #endif
 121         for(DEVICE* device = first_device; device; device = device->next_device) {
 122                 device->initialize();
 123         }
 124
 125         // BIOS
 126         memory->bios();
 127
 128         for(int i = 0; i < 4; i++) {
 129                 fdc->set_drive_type(i, DRIVE_TYPE_2D);
 130         }
 131 }
 132
 133 VM::~VM()
 134 {
 135         // delete all devices
 136         for(DEVICE* device = first_device; device;) {
 137                 DEVICE *next_device = device->next_device;
 138                 device->release();
 139                 delete device;
 140                 device = next_device;
 141         }
 142 }
 143
 144 DEVICE* VM::get_device(int id)
 145 {
 146         for(DEVICE* device = first_device; device; device = device->next_device) {
 147                 if(device->this_device_id == id) {
 148                         return device;
 149                 }
 150         }
 151         return NULL;
 152 }
 153
 154 // ----------------------------------------------------------------------------
 155 // drive virtual machine
 156 // ----------------------------------------------------------------------------
 157
 158 void VM::reset()
 159 {
 160         // reset all devices
 161         for(DEVICE* device = first_device; device; device = device->next_device) {
 162                 device->reset();
 163         }
 164 }
 165
 166 void VM::run()
 167 {
 168         event->drive();
 169 }
 170
 171 // ----------------------------------------------------------------------------
 172 // debugger
 173 // ----------------------------------------------------------------------------
 174
 175 #ifdef USE_DEBUGGER
 176 DEVICE *VM::get_cpu(int index)
 177 {
 178         if(index == 0) {
 179                 return cpu;
 180         }
 181         return NULL;
 182 }
 183 #endif
 184
 185 // ----------------------------------------------------------------------------
 186 // draw screen
 187 // ----------------------------------------------------------------------------
 188
 189 void VM::draw_screen()
 190 {
 191         vdp->draw_screen();
 192 }
 193
 194 // ----------------------------------------------------------------------------
 195 // soud manager
 196 // ----------------------------------------------------------------------------
 197
 198 void VM::initialize_sound(int rate, int samples)
 199 {
 200         // init sound manager
 201         event->initialize_sound(rate, samples);
 202
 203         // init sound gen
 204         psg->initialize_sound(rate, 3579545, 4000);
 205 }
 206
 207 uint16_t* VM::create_sound(int* extra_frames)
 208 {
 209         return event->create_sound(extra_frames);
 210 }
 211
 212 int VM::get_sound_buffer_ptr()
 213 {
 214         return event->get_sound_buffer_ptr();
 215 }
 216
 217 #ifdef USE_SOUND_VOLUME
 218 void VM::set_sound_device_volume(int ch, int decibel_l, int decibel_r)
 219 {
 220         if(ch == 0) {
 221                 psg->set_volume(0, decibel_l, decibel_r);
 222         } else if(ch == 1) {
 223                 drec->set_volume(0, decibel_l, decibel_r);
 224         } else if(ch == 2) {
 225                 fdc->get_context_noise_seek()->set_volume(0, decibel_l, decibel_r);
 226                 fdc->get_context_noise_head_down()->set_volume(0, decibel_l, decibel_r);
 227                 fdc->get_context_noise_head_up()->set_volume(0, decibel_l, decibel_r);
 228         } else if(ch == 3) {
 229                 drec->get_context_noise_play()->set_volume(0, decibel_l, decibel_r);
 230                 drec->get_context_noise_stop()->set_volume(0, decibel_l, decibel_r);
 231                 drec->get_context_noise_fast()->set_volume(0, decibel_l, decibel_r);
 232         }
 233 }
 234 #endif
 235
 236 // ----------------------------------------------------------------------------
 237 // user interface
 238 // ----------------------------------------------------------------------------
 239
 240 void VM::open_cart(int drv, const _TCHAR* file_path)
 241 {
 242         if(drv == 0) {
 243                 memory->open_cart(file_path);
 244                 if (check_file_extension(file_path, _T(".col"))) {
 245                         vdp->set_console(0x00);
 246                         vdp->set_context_irq(cpu, SIG_CPU_NMI, 1);
 247                         memory->bios();
 248                 } else {
 249                         vdp->set_context_irq(cpu, SIG_CPU_IRQ, 1);
 250                         if (check_file_extension(file_path, _T(".gg"))) {
 251                                 vdp->set_console(0x40);
 252                         } else {
 253                                 vdp->set_console(0x20);
 254                         }
 255                 }
 256                 reset();
 257         }
 258 }
 259
 260 void VM::close_cart(int drv)
 261 {
 262         if(drv == 0) {
 263                 memory->close_cart();
 264                 reset();
 265         }
 266 }
 267
 268 bool VM::is_cart_inserted(int drv)
 269 {
 270         if(drv == 0) {
 271                 return memory->is_cart_inserted();
 272         } else {
 273                 return false;
 274         }
 275 }
 276
 277 void VM::open_floppy_disk(int drv, const _TCHAR* file_path, int bank)
 278 {
 279         fdc->open_disk(drv, file_path, bank);
 280 }
 281
 282 void VM::close_floppy_disk(int drv)
 283 {
 284         fdc->close_disk(drv);
 285 }
 286
 287 bool VM::is_floppy_disk_inserted(int drv)
 288 {
 289         return fdc->is_disk_inserted(drv);
 290 }
 291
 292 void VM::is_floppy_disk_protected(int drv, bool value)
 293 {
 294         fdc->is_disk_protected(drv, value);
 295 }
 296
 297 bool VM::is_floppy_disk_protected(int drv)
 298 {
 299         return fdc->is_disk_protected(drv);
 300 }
 301
 302 uint32_t VM::is_floppy_disk_accessed()
 303 {
 304         return fdc->read_signal(0);
 305 }
 306
 307 void VM::play_tape(int drv, const _TCHAR* file_path)
 308 {
 309         drec->play_tape(file_path);
 310 //      drec->set_remote(true);
 311 }
 312
 313 void VM::rec_tape(int drv, const _TCHAR* file_path)
 314 {
 315         drec->rec_tape(file_path);
 316 //      drec->set_remote(true);
 317 }
 318
 319 void VM::close_tape(int drv)
 320 {
 321         emu->lock_vm();
 322         drec->close_tape();
 323         emu->unlock_vm();
 324 //      drec->set_remote(false);
 325 }
 326
 327 bool VM::is_tape_inserted(int drv)
 328 {
 329         return drec->is_tape_inserted();
 330 }
 331
 332 bool VM::is_tape_playing(int drv)
 333 {
 334         return drec->is_tape_playing();
 335 }
 336
 337 bool VM::is_tape_recording(int drv)
 338 {
 339         return drec->is_tape_recording();
 340 }
 341
 342 int VM::get_tape_position(int drv)
 343 {
 344         return drec->get_tape_position();
 345 }
 346
 347 const _TCHAR* VM::get_tape_message(int drv)
 348 {
 349         return drec->get_message();
 350 }
 351
 352 void VM::push_play(int drv)
 353 {
 354         drec->set_ff_rew(0);
 355         drec->set_remote(true);
 356 }
 357
 358 void VM::push_stop(int drv)
 359 {
 360         drec->set_remote(false);
 361 }
 362
 363 void VM::push_fast_forward(int drv)
 364 {
 365         drec->set_ff_rew(1);
 366         drec->set_remote(true);
 367 }
 368
 369 void VM::push_fast_rewind(int drv)
 370 {
 371         drec->set_ff_rew(-1);
 372         drec->set_remote(true);
 373 }
 374
 375 bool VM::is_frame_skippable()
 376 {
 377         return event->is_frame_skippable();
 378 }
 379
 380 void VM::update_config()
 381 {
 382         for(DEVICE* device = first_device; device; device = device->next_device) {
 383                 device->update_config();
 384         }
 385 }
 386