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 using SC3000::KEYBOARD;
  34 using SC3000::MEMORY;
  35
  36 // ----------------------------------------------------------------------------
  37 // initialize
  38 // ----------------------------------------------------------------------------
  39
  40 VM::VM(EMU_TEMPLATE* parent_emu) : VM_TEMPLATE(parent_emu)
  41 {
  42         // create devices
  43         first_device = last_device = NULL;
  44         dummy = new DEVICE(this, emu);  // must be 1st device
  45         event = new EVENT(this, emu);   // must be 2nd device
  46         dummy->set_device_name(_T("1st Dummy"));
  47
  48         drec = new DATAREC(this, emu);
  49         drec->set_context_noise_play(new NOISE(this, emu));
  50         drec->set_context_noise_stop(new NOISE(this, emu));
  51         drec->set_context_noise_fast(new NOISE(this, emu));
  52         sio = new I8251(this, emu);
  53         pio_k = new I8255(this, emu);
  54         pio_k->set_device_name(_T("8255 PIO (Keyboard)"));
  55         pio_f = new I8255(this, emu);
  56         pio_f->set_device_name(_T("8255 PIO (Floppy I/F)"));
  57         io = new IO(this, emu);
  58         io->space = 0x100;
  59         psg = new SN76489AN(this, emu);
  60         vdp = new TMS9918A(this, emu);
  61 #ifdef USE_DEBUGGER
  62 //      psg->set_context_debugger(new DEBUGGER(this, emu));
  63         vdp->set_context_debugger(new DEBUGGER(this, emu));
  64 #endif
  65         fdc = new UPD765A(this, emu);
  66 #ifdef USE_DEBUGGER
  67 //      fdc->set_context_debugger(new DEBUGGER(this, emu));
  68 #endif
  69         fdc->set_context_noise_seek(new NOISE(this, emu));
  70         fdc->set_context_noise_head_down(new NOISE(this, emu));
  71         fdc->set_context_noise_head_up(new NOISE(this, emu));
  72         cpu = new Z80(this, emu);
  73
  74         key = new KEYBOARD(this, emu);
  75         memory = new MEMORY(this, emu);
  76
  77         // set contexts
  78         event->set_context_cpu(cpu);
  79         event->set_context_sound(psg);
  80         event->set_context_sound(drec);
  81         event->set_context_sound(fdc->get_context_noise_seek());
  82         event->set_context_sound(fdc->get_context_noise_head_down());
  83         event->set_context_sound(fdc->get_context_noise_head_up());
  84         event->set_context_sound(drec->get_context_noise_play());
  85         event->set_context_sound(drec->get_context_noise_stop());
  86         event->set_context_sound(drec->get_context_noise_fast());
  87
  88         drec->set_context_ear(pio_k, SIG_I8255_PORT_B, 0x80);
  89         pio_k->set_context_port_c(key, SIG_KEYBOARD_COLUMN, 0x07, 0);
  90         pio_k->set_context_port_c(drec, SIG_DATAREC_REMOTE, 0x08, 0);
  91         pio_k->set_context_port_c(drec, SIG_DATAREC_MIC, 0x10, 0);
  92         pio_f->set_context_port_c(fdc, SIG_UPD765A_MOTOR_NEG, 2, 0);
  93         pio_f->set_context_port_c(fdc, SIG_UPD765A_TC, 4, 0);
  94         pio_f->set_context_port_c(fdc, SIG_UPD765A_RESET, 8, 0);
  95         pio_f->set_context_port_c(memory, SIG_MEMORY_SEL, 0x40, 0);
  96         vdp->set_context_irq(cpu, SIG_CPU_IRQ, 1);
  97         fdc->set_context_irq(pio_f, SIG_I8255_PORT_A, 1);
  98         fdc->set_context_index(pio_f, SIG_I8255_PORT_A, 4);
  99
 100         key->set_context_cpu(cpu);
 101         key->set_context_pio(pio_k);
 102
 103         // cpu bus
 104         cpu->set_context_mem(memory);
 105         cpu->set_context_io(io);
 106         cpu->set_context_intr(dummy);
 107 #ifdef USE_DEBUGGER
 108         cpu->set_context_debugger(new DEBUGGER(this, emu));
 109 #endif
 110
 111         // i/o bus
 112         io->set_iomap_range_rw(0x40, 0x7f, psg);
 113         io->set_iomap_range_rw(0x80, 0xbf, vdp);
 114         io->set_iomap_range_rw(0xc0, 0xdf, pio_k);
 115         io->set_iomap_range_rw(0xe0, 0xe3, fdc);
 116         io->set_iomap_range_rw(0xe4, 0xe7, pio_f);
 117         io->set_iomap_range_rw(0xe8, 0xeb, sio);
 118
 119         // initialize all devices
 120 #if defined(__GIT_REPO_VERSION)
 121         set_git_repo_version(__GIT_REPO_VERSION);
 122 #endif
 123         initialize_devices();
 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 // debugger
 153 // ----------------------------------------------------------------------------
 154
 155 #ifdef USE_DEBUGGER
 156 DEVICE *VM::get_cpu(int index)
 157 {
 158         if(index == 0) {
 159                 return cpu;
 160         }
 161         return NULL;
 162 }
 163 #endif
 164
 165 // ----------------------------------------------------------------------------
 166 // drive virtual machine
 167 // ----------------------------------------------------------------------------
 168
 169 void VM::reset()
 170 {
 171         // reset all devices
 172         for(DEVICE* device = first_device; device; device = device->next_device) {
 173                 device->reset();
 174         }
 175 }
 176
 177 void VM::run()
 178 {
 179         event->drive();
 180 }
 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, 8000);
 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                 reset();
 242         }
 243 }
 244
 245 void VM::close_cart(int drv)
 246 {
 247         if(drv == 0) {
 248                 memory->close_cart();
 249                 reset();
 250         }
 251 }
 252
 253 bool VM::is_cart_inserted(int drv)
 254 {
 255         if(drv == 0) {
 256                 return memory->is_cart_inserted();
 257         } else {
 258                 return false;
 259         }
 260 }
 261
 262 void VM::open_floppy_disk(int drv, const _TCHAR* file_path, int bank)
 263 {
 264         fdc->open_disk(drv, file_path, bank);
 265 }
 266
 267 void VM::close_floppy_disk(int drv)
 268 {
 269         fdc->close_disk(drv);
 270 }
 271
 272 bool VM::is_floppy_disk_inserted(int drv)
 273 {
 274         return fdc->is_disk_inserted(drv);
 275 }
 276
 277 void VM::is_floppy_disk_protected(int drv, bool value)
 278 {
 279         fdc->is_disk_protected(drv, value);
 280 }
 281
 282 bool VM::is_floppy_disk_protected(int drv)
 283 {
 284         return fdc->is_disk_protected(drv);
 285 }
 286
 287 uint32_t VM::is_floppy_disk_accessed()
 288 {
 289         return fdc->read_signal(0);
 290 }
 291
 292 void VM::play_tape(int drv, const _TCHAR* file_path)
 293 {
 294         bool remote = drec->get_remote();
 295
 296         if(drec->play_tape(file_path) && remote) {
 297                 // if machine already sets remote on, start playing now
 298                 push_play(drv);
 299         }
 300 }
 301
 302 void VM::rec_tape(int drv, const _TCHAR* file_path)
 303 {
 304         bool remote = drec->get_remote();
 305
 306         if(drec->rec_tape(file_path) && remote) {
 307                 // if machine already sets remote on, start recording now
 308                 push_play(drv);
 309         }
 310 }
 311
 312 void VM::close_tape(int drv)
 313 {
 314         emu->lock_vm();
 315         drec->close_tape();
 316         emu->unlock_vm();
 317         drec->set_remote(false);
 318 }
 319
 320 bool VM::is_tape_inserted(int drv)
 321 {
 322         return drec->is_tape_inserted();
 323 }
 324
 325 bool VM::is_tape_playing(int drv)
 326 {
 327         return drec->is_tape_playing();
 328 }
 329
 330 bool VM::is_tape_recording(int drv)
 331 {
 332         return drec->is_tape_recording();
 333 }
 334
 335 int VM::get_tape_position(int drv)
 336 {
 337         return drec->get_tape_position();
 338 }
 339
 340 const _TCHAR* VM::get_tape_message(int drv)
 341 {
 342         return drec->get_message();
 343 }
 344
 345 void VM::push_play(int drv)
 346 {
 347         drec->set_remote(false);
 348         drec->set_ff_rew(0);
 349         drec->set_remote(true);
 350 }
 351
 352 void VM::push_stop(int drv)
 353 {
 354         drec->set_remote(false);
 355 }
 356
 357 void VM::push_fast_forward(int drv)
 358 {
 359         drec->set_remote(false);
 360         drec->set_ff_rew(1);
 361         drec->set_remote(true);
 362 }
 363
 364 void VM::push_fast_rewind(int drv)
 365 {
 366         drec->set_remote(false);
 367         drec->set_ff_rew(-1);
 368         drec->set_remote(true);
 369 }
 370
 371 bool VM::is_frame_skippable()
 372 {
 373         return event->is_frame_skippable();
 374 }
 375
 376 void VM::update_config()
 377 {
 378         for(DEVICE* device = first_device; device; device = device->next_device) {
 379                 device->update_config();
 380         }
 381 }
 382
 383 double VM::get_current_usec()
 384 {
 385         if(event == NULL) return 0.0;
 386         return event->get_current_usec();
 387 }
 388
 389 uint64_t VM::get_current_clock_uint64()
 390 {
 391                 if(event == NULL) return (uint64_t)0;
 392                 return event->get_current_clock_uint64();
 393 }
 394
 395 #define STATE_VERSION   4
 396
 397 bool VM::process_state(FILEIO* state_fio, bool loading)
 398 {
 399         if(!(VM_TEMPLATE::process_state_core(state_fio, loading, STATE_VERSION))) {
 400                 return false;
 401         }
 402         // Machine specified.
 403         return true;
 404 }