source/src/vm/sc3000/sc3000.cpp

   1 /*
   2         SEGA SC-3000 Emulator 'eSC-3000'
   3
   4         Author : Takeda.Toshiya
   5         Date   : 2010.08.17-
   6
   7         [ virtual machine ]
   8 */
   9
  10 #include "sc3000.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 "../tms9918a.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
  33 // ----------------------------------------------------------------------------
  34 // initialize
  35 // ----------------------------------------------------------------------------
  36
  37 VM::VM(EMU* parent_emu) : VM_TEMPLATE(parent_emu)
  38 {
  39         // create devices
  40         first_device = last_device = NULL;
  41         dummy = new DEVICE(this, emu);  // must be 1st device
  42         event = new EVENT(this, emu);   // must be 2nd device
  43         dummy->set_device_name(_T("1st Dummy"));
  44
  45         drec = new DATAREC(this, emu);
  46         drec->set_context_noise_play(new NOISE(this, emu));
  47         drec->set_context_noise_stop(new NOISE(this, emu));
  48         drec->set_context_noise_fast(new NOISE(this, emu));
  49         sio = new I8251(this, emu);
  50         pio_k = new I8255(this, emu);
  51         pio_k->set_device_name(_T("8255 PIO (Keyboard)"));
  52         pio_f = new I8255(this, emu);
  53         pio_f->set_device_name(_T("8255 PIO (Floppy I/F)"));
  54         io = new IO(this, emu);
  55         psg = new SN76489AN(this, emu);
  56         vdp = new TMS9918A(this, emu);
  57         fdc = new UPD765A(this, emu);
  58         fdc->set_context_noise_seek(new NOISE(this, emu));
  59         fdc->set_context_noise_head_down(new NOISE(this, emu));
  60         fdc->set_context_noise_head_up(new NOISE(this, emu));
  61         cpu = new Z80(this, emu);
  62
  63         key = new KEYBOARD(this, emu);
  64         memory = new MEMORY(this, emu);
  65
  66         // set contexts
  67         event->set_context_cpu(cpu);
  68         event->set_context_sound(psg);
  69         event->set_context_sound(drec);
  70         event->set_context_sound(fdc->get_context_noise_seek());
  71         event->set_context_sound(fdc->get_context_noise_head_down());
  72         event->set_context_sound(fdc->get_context_noise_head_up());
  73         event->set_context_sound(drec->get_context_noise_play());
  74         event->set_context_sound(drec->get_context_noise_stop());
  75         event->set_context_sound(drec->get_context_noise_fast());
  76
  77         drec->set_context_ear(pio_k, SIG_I8255_PORT_B, 0x80);
  78         pio_k->set_context_port_c(key, SIG_KEYBOARD_COLUMN, 0x07, 0);
  79         pio_k->set_context_port_c(drec, SIG_DATAREC_REMOTE, 0x08, 0);
  80         pio_k->set_context_port_c(drec, SIG_DATAREC_MIC, 0x10, 0);
  81         pio_f->set_context_port_c(fdc, SIG_UPD765A_MOTOR_NEG, 2, 0);
  82         pio_f->set_context_port_c(fdc, SIG_UPD765A_TC, 4, 0);
  83         pio_f->set_context_port_c(fdc, SIG_UPD765A_RESET, 8, 0);
  84         pio_f->set_context_port_c(memory, SIG_MEMORY_SEL, 0x40, 0);
  85         vdp->set_context_irq(cpu, SIG_CPU_IRQ, 1);
  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
  92         // cpu bus
  93         cpu->set_context_mem(memory);
  94         cpu->set_context_io(io);
  95         cpu->set_context_intr(dummy);
  96 #ifdef USE_DEBUGGER
  97         cpu->set_context_debugger(new DEBUGGER(this, emu));
  98 #endif
  99
 100         // i/o bus
 101         io->set_iomap_range_rw(0x40, 0x7f, psg);
 102         io->set_iomap_range_rw(0x80, 0xbf, vdp);
 103         io->set_iomap_range_rw(0xc0, 0xdf, pio_k);
 104         io->set_iomap_range_rw(0xe0, 0xe3, fdc);
 105         io->set_iomap_range_rw(0xe4, 0xe7, pio_f);
 106         io->set_iomap_range_rw(0xe8, 0xeb, sio);
 107
 108         // initialize all devices
 109         for(DEVICE* device = first_device; device; device = device->next_device) {
 110                 device->initialize();
 111         }
 112         for(int i = 0; i < 4; i++) {
 113                 fdc->set_drive_type(i, DRIVE_TYPE_2D);
 114         }
 115 }
 116
 117 VM::~VM()
 118 {
 119         // delete all devices
 120         for(DEVICE* device = first_device; device;) {
 121                 DEVICE *next_device = device->next_device;
 122                 device->release();
 123                 delete device;
 124                 device = next_device;
 125         }
 126 }
 127
 128 DEVICE* VM::get_device(int id)
 129 {
 130         for(DEVICE* device = first_device; device; device = device->next_device) {
 131                 if(device->this_device_id == id) {
 132                         return device;
 133                 }
 134         }
 135         return NULL;
 136 }
 137
 138 // ----------------------------------------------------------------------------
 139 // debugger
 140 // ----------------------------------------------------------------------------
 141
 142 #ifdef USE_DEBUGGER
 143 DEVICE *VM::get_cpu(int index)
 144 {
 145         if(index == 0) {
 146                 return cpu;
 147         }
 148         return NULL;
 149 }
 150 #endif
 151
 152 // ----------------------------------------------------------------------------
 153 // drive virtual machine
 154 // ----------------------------------------------------------------------------
 155
 156 void VM::reset()
 157 {
 158         // reset all devices
 159         for(DEVICE* device = first_device; device; device = device->next_device) {
 160                 device->reset();
 161         }
 162 }
 163
 164 void VM::run()
 165 {
 166         event->drive();
 167 }
 168
 169 // ----------------------------------------------------------------------------
 170 // draw screen
 171 // ----------------------------------------------------------------------------
 172
 173 void VM::draw_screen()
 174 {
 175         vdp->draw_screen();
 176 }
 177
 178 // ----------------------------------------------------------------------------
 179 // soud manager
 180 // ----------------------------------------------------------------------------
 181
 182 void VM::initialize_sound(int rate, int samples)
 183 {
 184         // init sound manager
 185         event->initialize_sound(rate, samples);
 186
 187         // init sound gen
 188         psg->initialize_sound(rate, 3579545, 8000);
 189 }
 190
 191 uint16_t* VM::create_sound(int* extra_frames)
 192 {
 193         return event->create_sound(extra_frames);
 194 }
 195
 196 int VM::get_sound_buffer_ptr()
 197 {
 198         return event->get_sound_buffer_ptr();
 199 }
 200
 201 #ifdef USE_SOUND_VOLUME
 202 void VM::set_sound_device_volume(int ch, int decibel_l, int decibel_r)
 203 {
 204         if(ch == 0) {
 205                 psg->set_volume(0, decibel_l, decibel_r);
 206         } else if(ch == 1) {
 207                 drec->set_volume(0, decibel_l, decibel_r);
 208         } else if(ch == 2) {
 209                 fdc->get_context_noise_seek()->set_volume(0, decibel_l, decibel_r);
 210                 fdc->get_context_noise_head_down()->set_volume(0, decibel_l, decibel_r);
 211                 fdc->get_context_noise_head_up()->set_volume(0, decibel_l, decibel_r);
 212         } else if(ch == 3) {
 213                 drec->get_context_noise_play()->set_volume(0, decibel_l, decibel_r);
 214                 drec->get_context_noise_stop()->set_volume(0, decibel_l, decibel_r);
 215                 drec->get_context_noise_fast()->set_volume(0, decibel_l, decibel_r);
 216         }
 217 }
 218 #endif
 219
 220 // ----------------------------------------------------------------------------
 221 // user interface
 222 // ----------------------------------------------------------------------------
 223
 224 void VM::open_cart(int drv, const _TCHAR* file_path)
 225 {
 226         if(drv == 0) {
 227                 memory->open_cart(file_path);
 228                 reset();
 229         }
 230 }
 231
 232 void VM::close_cart(int drv)
 233 {
 234         if(drv == 0) {
 235                 memory->close_cart();
 236                 reset();
 237         }
 238 }
 239
 240 bool VM::is_cart_inserted(int drv)
 241 {
 242         if(drv == 0) {
 243                 return memory->is_cart_inserted();
 244         } else {
 245                 return false;
 246         }
 247 }
 248
 249 void VM::open_floppy_disk(int drv, const _TCHAR* file_path, int bank)
 250 {
 251         fdc->open_disk(drv, file_path, bank);
 252 }
 253
 254 void VM::close_floppy_disk(int drv)
 255 {
 256         fdc->close_disk(drv);
 257 }
 258
 259 bool VM::is_floppy_disk_inserted(int drv)
 260 {
 261         return fdc->is_disk_inserted(drv);
 262 }
 263
 264 void VM::is_floppy_disk_protected(int drv, bool value)
 265 {
 266         fdc->is_disk_protected(drv, value);
 267 }
 268
 269 bool VM::is_floppy_disk_protected(int drv)
 270 {
 271         return fdc->is_disk_protected(drv);
 272 }
 273
 274 uint32_t VM::is_floppy_disk_accessed()
 275 {
 276         return fdc->read_signal(0);
 277 }
 278
 279 void VM::play_tape(int drv, const _TCHAR* file_path)
 280 {
 281         drec->play_tape(file_path);
 282 //      drec->set_remote(true);
 283 }
 284
 285 void VM::rec_tape(int drv, const _TCHAR* file_path)
 286 {
 287         drec->rec_tape(file_path);
 288 //      drec->set_remote(true);
 289 }
 290
 291 void VM::close_tape(int drv)
 292 {
 293         emu->lock_vm();
 294         drec->close_tape();
 295         emu->unlock_vm();
 296 //      drec->set_remote(false);
 297 }
 298
 299 bool VM::is_tape_inserted(int drv)
 300 {
 301         return drec->is_tape_inserted();
 302 }
 303
 304 bool VM::is_tape_playing(int drv)
 305 {
 306         return drec->is_tape_playing();
 307 }
 308
 309 bool VM::is_tape_recording(int drv)
 310 {
 311         return drec->is_tape_recording();
 312 }
 313
 314 int VM::get_tape_position(int drv)
 315 {
 316         return drec->get_tape_position();
 317 }
 318
 319 const _TCHAR* VM::get_tape_message(int drv)
 320 {
 321         return drec->get_message();
 322 }
 323
 324 void VM::push_play(int drv)
 325 {
 326         drec->set_ff_rew(0);
 327         drec->set_remote(true);
 328 }
 329
 330 void VM::push_stop(int drv)
 331 {
 332         drec->set_remote(false);
 333 }
 334
 335 void VM::push_fast_forward(int drv)
 336 {
 337         drec->set_ff_rew(1);
 338         drec->set_remote(true);
 339 }
 340
 341 void VM::push_fast_rewind(int drv)
 342 {
 343         drec->set_ff_rew(-1);
 344         drec->set_remote(true);
 345 }
 346
 347 bool VM::is_frame_skippable()
 348 {
 349         return event->is_frame_skippable();
 350 }
 351
 352 void VM::update_config()
 353 {
 354         for(DEVICE* device = first_device; device; device = device->next_device) {
 355                 device->update_config();
 356         }
 357 }
 358
 359 #define STATE_VERSION   3
 360
 361 #include "../../statesub.h"
 362 #include "../../qt/gui/csp_logger.h"
 363 extern CSP_Logger DLL_PREFIX_I *csp_logger;
 364
 365 void VM::decl_state(void)
 366 {
 367         state_entry = new csp_state_utils(STATE_VERSION, 0, (_TCHAR *)(_T("CSP::SC_3000_HEAD")), csp_logger);
 368         for(DEVICE* device = first_device; device; device = device->next_device) {
 369                 device->decl_state();
 370         }
 371 }
 372
 373 void VM::save_state(FILEIO* state_fio)
 374 {
 375         //state_fio->FputUint32(STATE_VERSION);
 376
 377         if(state_entry != NULL) {
 378                 state_entry->save_state(state_fio);
 379         }
 380         for(DEVICE* device = first_device; device; device = device->next_device) {
 381                 device->save_state(state_fio);
 382         }
 383 }
 384
 385 bool VM::load_state(FILEIO* state_fio)
 386 {
 387         //if(state_fio->FgetUint32() != STATE_VERSION) {
 388         //      return false;
 389         //}
 390         bool mb = false;
 391         if(state_entry != NULL) {
 392                 mb = state_entry->load_state(state_fio);
 393         }
 394         if(!mb) {
 395                 emu->out_debug_log("INFO: HEADER DATA ERROR");
 396                 return false;
 397         }
 398         for(DEVICE* device = first_device; device; device = device->next_device) {
 399                 if(!device->load_state(state_fio)) {
 400                         return false;
 401                 }
 402         }
 403         return true;
 404 }
 405