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 #if defined(__GIT_REPO_VERSION)
 110         strncpy(_git_revision, __GIT_REPO_VERSION, sizeof(_git_revision) - 1);
 111 #endif
 112         for(DEVICE* device = first_device; device; device = device->next_device) {
 113                 device->initialize();
 114         }
 115         for(int i = 0; i < 4; i++) {
 116                 fdc->set_drive_type(i, DRIVE_TYPE_2D);
 117         }
 118 }
 119
 120 VM::~VM()
 121 {
 122         // delete all devices
 123         for(DEVICE* device = first_device; device;) {
 124                 DEVICE *next_device = device->next_device;
 125                 device->release();
 126                 delete device;
 127                 device = next_device;
 128         }
 129 }
 130
 131 DEVICE* VM::get_device(int id)
 132 {
 133         for(DEVICE* device = first_device; device; device = device->next_device) {
 134                 if(device->this_device_id == id) {
 135                         return device;
 136                 }
 137         }
 138         return NULL;
 139 }
 140
 141 // ----------------------------------------------------------------------------
 142 // debugger
 143 // ----------------------------------------------------------------------------
 144
 145 #ifdef USE_DEBUGGER
 146 DEVICE *VM::get_cpu(int index)
 147 {
 148         if(index == 0) {
 149                 return cpu;
 150         }
 151         return NULL;
 152 }
 153 #endif
 154
 155 // ----------------------------------------------------------------------------
 156 // drive virtual machine
 157 // ----------------------------------------------------------------------------
 158
 159 void VM::reset()
 160 {
 161         // reset all devices
 162         for(DEVICE* device = first_device; device; device = device->next_device) {
 163                 device->reset();
 164         }
 165 }
 166
 167 void VM::run()
 168 {
 169         event->drive();
 170 }
 171
 172 // ----------------------------------------------------------------------------
 173 // draw screen
 174 // ----------------------------------------------------------------------------
 175
 176 void VM::draw_screen()
 177 {
 178         vdp->draw_screen();
 179 }
 180
 181 // ----------------------------------------------------------------------------
 182 // soud manager
 183 // ----------------------------------------------------------------------------
 184
 185 void VM::initialize_sound(int rate, int samples)
 186 {
 187         // init sound manager
 188         event->initialize_sound(rate, samples);
 189
 190         // init sound gen
 191         psg->initialize_sound(rate, 3579545, 8000);
 192 }
 193
 194 uint16_t* VM::create_sound(int* extra_frames)
 195 {
 196         return event->create_sound(extra_frames);
 197 }
 198
 199 int VM::get_sound_buffer_ptr()
 200 {
 201         return event->get_sound_buffer_ptr();
 202 }
 203
 204 #ifdef USE_SOUND_VOLUME
 205 void VM::set_sound_device_volume(int ch, int decibel_l, int decibel_r)
 206 {
 207         if(ch == 0) {
 208                 psg->set_volume(0, decibel_l, decibel_r);
 209         } else if(ch == 1) {
 210                 drec->set_volume(0, decibel_l, decibel_r);
 211         } else if(ch == 2) {
 212                 fdc->get_context_noise_seek()->set_volume(0, decibel_l, decibel_r);
 213                 fdc->get_context_noise_head_down()->set_volume(0, decibel_l, decibel_r);
 214                 fdc->get_context_noise_head_up()->set_volume(0, decibel_l, decibel_r);
 215         } else if(ch == 3) {
 216                 drec->get_context_noise_play()->set_volume(0, decibel_l, decibel_r);
 217                 drec->get_context_noise_stop()->set_volume(0, decibel_l, decibel_r);
 218                 drec->get_context_noise_fast()->set_volume(0, decibel_l, decibel_r);
 219         }
 220 }
 221 #endif
 222
 223 // ----------------------------------------------------------------------------
 224 // user interface
 225 // ----------------------------------------------------------------------------
 226
 227 void VM::open_cart(int drv, const _TCHAR* file_path)
 228 {
 229         if(drv == 0) {
 230                 memory->open_cart(file_path);
 231                 reset();
 232         }
 233 }
 234
 235 void VM::close_cart(int drv)
 236 {
 237         if(drv == 0) {
 238                 memory->close_cart();
 239                 reset();
 240         }
 241 }
 242
 243 bool VM::is_cart_inserted(int drv)
 244 {
 245         if(drv == 0) {
 246                 return memory->is_cart_inserted();
 247         } else {
 248                 return false;
 249         }
 250 }
 251
 252 void VM::open_floppy_disk(int drv, const _TCHAR* file_path, int bank)
 253 {
 254         fdc->open_disk(drv, file_path, bank);
 255 }
 256
 257 void VM::close_floppy_disk(int drv)
 258 {
 259         fdc->close_disk(drv);
 260 }
 261
 262 bool VM::is_floppy_disk_inserted(int drv)
 263 {
 264         return fdc->is_disk_inserted(drv);
 265 }
 266
 267 void VM::is_floppy_disk_protected(int drv, bool value)
 268 {
 269         fdc->is_disk_protected(drv, value);
 270 }
 271
 272 bool VM::is_floppy_disk_protected(int drv)
 273 {
 274         return fdc->is_disk_protected(drv);
 275 }
 276
 277 uint32_t VM::is_floppy_disk_accessed()
 278 {
 279         return fdc->read_signal(0);
 280 }
 281
 282 void VM::play_tape(int drv, const _TCHAR* file_path)
 283 {
 284         drec->play_tape(file_path);
 285 //      drec->set_remote(true);
 286 }
 287
 288 void VM::rec_tape(int drv, const _TCHAR* file_path)
 289 {
 290         drec->rec_tape(file_path);
 291 //      drec->set_remote(true);
 292 }
 293
 294 void VM::close_tape(int drv)
 295 {
 296         emu->lock_vm();
 297         drec->close_tape();
 298         emu->unlock_vm();
 299 //      drec->set_remote(false);
 300 }
 301
 302 bool VM::is_tape_inserted(int drv)
 303 {
 304         return drec->is_tape_inserted();
 305 }
 306
 307 bool VM::is_tape_playing(int drv)
 308 {
 309         return drec->is_tape_playing();
 310 }
 311
 312 bool VM::is_tape_recording(int drv)
 313 {
 314         return drec->is_tape_recording();
 315 }
 316
 317 int VM::get_tape_position(int drv)
 318 {
 319         return drec->get_tape_position();
 320 }
 321
 322 const _TCHAR* VM::get_tape_message(int drv)
 323 {
 324         return drec->get_message();
 325 }
 326
 327 void VM::push_play(int drv)
 328 {
 329         drec->set_ff_rew(0);
 330         drec->set_remote(true);
 331 }
 332
 333 void VM::push_stop(int drv)
 334 {
 335         drec->set_remote(false);
 336 }
 337
 338 void VM::push_fast_forward(int drv)
 339 {
 340         drec->set_ff_rew(1);
 341         drec->set_remote(true);
 342 }
 343
 344 void VM::push_fast_rewind(int drv)
 345 {
 346         drec->set_ff_rew(-1);
 347         drec->set_remote(true);
 348 }
 349
 350 bool VM::is_frame_skippable()
 351 {
 352         return event->is_frame_skippable();
 353 }
 354
 355 void VM::update_config()
 356 {
 357         for(DEVICE* device = first_device; device; device = device->next_device) {
 358                 device->update_config();
 359         }
 360 }
 361
 362 #define STATE_VERSION   3
 363
 364 #include "../../statesub.h"
 365 #include "../../qt/gui/csp_logger.h"
 366 extern CSP_Logger DLL_PREFIX_I *csp_logger;
 367
 368 void VM::decl_state(void)
 369 {
 370         state_entry = new csp_state_utils(STATE_VERSION, 0, (_TCHAR *)(_T("CSP::SC_3000_HEAD")), csp_logger);
 371         for(DEVICE* device = first_device; device; device = device->next_device) {
 372                 device->decl_state();
 373         }
 374 }
 375
 376 void VM::save_state(FILEIO* state_fio)
 377 {
 378         //state_fio->FputUint32(STATE_VERSION);
 379
 380         if(state_entry != NULL) {
 381                 state_entry->save_state(state_fio);
 382         }
 383         for(DEVICE* device = first_device; device; device = device->next_device) {
 384                 device->save_state(state_fio);
 385         }
 386 }
 387
 388 bool VM::load_state(FILEIO* state_fio)
 389 {
 390         //if(state_fio->FgetUint32() != STATE_VERSION) {
 391         //      return false;
 392         //}
 393         bool mb = false;
 394         if(state_entry != NULL) {
 395                 mb = state_entry->load_state(state_fio);
 396         }
 397         if(!mb) {
 398                 emu->out_debug_log("INFO: HEADER DATA ERROR");
 399                 return false;
 400         }
 401         for(DEVICE* device = first_device; device; device = device->next_device) {
 402                 if(!device->load_state(state_fio)) {
 403                         return false;
 404                 }
 405         }
 406         return true;
 407 }
 408