source/src/vm/fm7/fm7.cpp

   1
   2 /*
   3  * FM7 -> VM
   4  * (C) 2015 K.Ohta <whatisthis.sowhat _at_ gmail.com>
   5  * History:
   6  *   Feb 27, 2015 : Initial
   7  */
   8
   9 #include "fm7.h"
  10 #include "../../emu.h"
  11 #include "../../config.h"
  12 #include "../device.h"
  13 #include "../event.h"
  14 #include "../memory.h"
  15 #include "../prnfile.h"
  16
  17 #ifdef USE_DEBUGGER
  18 #include "../debugger.h"
  19 #endif
  20 #if defined(SUPPORT_DUMMY_DEVICE_LED)
  21 #include "../dummydevice.h"
  22 #else
  23 #define SIG_DUMMYDEVICE_BIT0 0
  24 #define SIG_DUMMYDEVICE_BIT1 1
  25 #define SIG_DUMMYDEVICE_BIT2 2
  26 #endif
  27
  28 #include "../datarec.h"
  29 #include "../disk.h"
  30
  31 #include "../mc6809.h"
  32 #include "../z80.h"
  33 #include "../mb8877.h"
  34
  35 #include "../pcm1bit.h"
  36 #include "../ym2203.h"
  37 #if defined(_FM77AV_VARIANTS)
  38 #include "mb61vh010.h"
  39 #include "../beep.h"
  40 #endif
  41 #if defined(HAS_DMA)
  42 #include "hd6844.h"
  43 #endif
  44
  45 #include "./fm7_mainio.h"
  46 #include "./fm7_mainmem.h"
  47 #include "./fm7_display.h"
  48 #include "./fm7_keyboard.h"
  49 #include "./joystick.h"
  50
  51 #include "./kanjirom.h"
  52
  53 VM::VM(EMU* parent_emu): emu(parent_emu)
  54 {
  55
  56         first_device = last_device = NULL;
  57 #if defined(_FM8)
  58         psg = NULL;
  59 #else
  60 # if defined(_FM77AV_VARIANTS)
  61         opn[0] = opn[1] = opn[2] = NULL;
  62 # else
  63         opn[0] = opn[1] = opn[2] = psg = NULL;
  64 # endif
  65 #endif
  66         dummy = new DEVICE(this, emu);  // must be 1st device
  67         event = new EVENT(this, emu);   // must be 2nd device
  68
  69         dummycpu = new DEVICE(this, emu);
  70         maincpu = new MC6809(this, emu);
  71         subcpu = new MC6809(this, emu);
  72 #ifdef WITH_Z80
  73         z80cpu = new Z80(this, emu);
  74 #endif
  75         // basic devices
  76 #if defined(_FM8) || defined(_FM7) || defined(_FMNEW7)
  77         if((config.dipswitch & FM7_DIPSW_CONNECT_KANJIROM) != 0) {
  78                 kanjiclass1 = new KANJIROM(this, emu, false);
  79         }
  80 #else
  81         kanjiclass1 = new KANJIROM(this, emu, false);
  82 #endif
  83 #ifdef CAPABLE_KANJI_CLASS2
  84         kanjiclass2 = new KANJIROM(this, emu, true);
  85 #endif
  86         joystick  = new JOYSTICK(this, emu);
  87
  88         // I/Os
  89         drec = new DATAREC(this, emu);
  90         pcm1bit = new PCM1BIT(this, emu);
  91         fdc  = new MB8877(this, emu);
  92 #if defined(HAS_DMA)
  93         dmac = new HD6844(this, emu);
  94 #endif
  95 #if defined(_FM8)
  96         psg = new YM2203(this, emu);
  97 #else
  98         opn[0] = new YM2203(this, emu); // OPN
  99         opn[1] = new YM2203(this, emu); // WHG
 100         opn[2] = new YM2203(this, emu); // THG
 101 # if !defined(_FM77AV_VARIANTS)
 102         psg = new YM2203(this, emu);
 103 # endif
 104 #endif
 105 #if defined(_FM77AV_VARIANTS)
 106         alu = new MB61VH010(this, emu);
 107         keyboard_beep = new BEEP(this, emu);
 108 #endif
 109         display = new DISPLAY(this, emu);
 110         printer = new PRNFILE(this, emu);
 111         mainio  = new FM7_MAINIO(this, emu);
 112         mainmem = new FM7_MAINMEM(this, emu);
 113         keyboard = new KEYBOARD(this, emu);
 114
 115 #if defined(SUPPORT_DUMMY_DEVICE_LED)
 116         led_terminate = new DUMMYDEVICE(this, emu);
 117 #else
 118         led_terminate = new DEVICE(this, emu);
 119 #endif
 120         // MEMORIES must set before initialize().
 121         maincpu->set_context_mem(mainmem);
 122         subcpu->set_context_mem(display);
 123 #ifdef WITH_Z80
 124         z80cpu->set_context_mem(mainmem);
 125 #endif
 126 #ifdef USE_DEBUGGER
 127         maincpu->set_context_debugger(new DEBUGGER(this, emu));
 128         subcpu->set_context_debugger(new DEBUGGER(this, emu));
 129 # ifdef WITH_Z80
 130         z80cpu->set_context_debugger(new DEBUGGER(this, emu));
 131 # endif
 132 #endif
 133         connect_bus();
 134         initialize();
 135 }
 136
 137 VM::~VM()
 138 {
 139         // delete all devices
 140         for(DEVICE* device = first_device; device;) {
 141                 DEVICE *next_device = device->next_device;
 142                 device->release();
 143                 delete device;
 144                 device = next_device;
 145         }
 146 }
 147
 148 DEVICE* VM::get_device(int id)
 149 {
 150         for(DEVICE* device = first_device; device; device = device->next_device) {
 151                 if(device->this_device_id == id) {
 152                         return device;
 153                 }
 154         }
 155         return NULL;
 156 }
 157
 158
 159 void VM::initialize(void)
 160 {
 161         clock_low = false;
 162
 163 }
 164
 165
 166 void VM::connect_bus(void)
 167 {
 168         uint32 mainclock;
 169         uint32 subclock;
 170
 171         /*
 172          * CLASS CONSTRUCTION
 173          *
 174          * VM
 175          *  |-> MAINCPU -> MAINMEM -> MAINIO -> MAIN DEVICES
 176          *  |             |        |
 177          *  | -> SUBCPU  -> SUBMEM  -> SUBIO -> SUB DEVICES
 178          *  | -> DISPLAY
 179          *  | -> KEYBOARD
 180          *
 181          *  MAINMEM can access SUBMEM/IO, when SUBCPU is halted.
 182          *  MAINMEM and SUBMEM can access DISPLAY and KEYBOARD with exclusive.
 183          *  MAINCPU can access MAINMEM.
 184          *  SUBCPU  can access SUBMEM.
 185          *  DISPLAY : R/W from MAINCPU and SUBCPU.
 186          *  KEYBOARD : R/W
 187          *
 188          */
 189         event->set_frames_per_sec(FRAMES_PER_SEC);
 190         event->set_lines_per_frame(LINES_PER_FRAME);
 191         event->set_context_cpu(dummycpu, (CPU_CLOCKS * 3) / 8); // MAYBE FIX With eFM77AV40/20.
 192         //event->set_context_cpu(dummycpu, (int)(4.9152 * 1000.0 * 1000.0 / 4.0));
 193
 194 #if defined(_FM8)
 195         mainclock = MAINCLOCK_SLOW;
 196         subclock = SUBCLOCK_SLOW;
 197 #else
 198         if(config.cpu_type == 0) {
 199                 // 2MHz
 200                 subclock = SUBCLOCK_NORMAL;
 201                 mainclock = MAINCLOCK_NORMAL;
 202         } else {
 203                 // 1.2MHz
 204                 mainclock = MAINCLOCK_SLOW;
 205                 subclock = SUBCLOCK_SLOW;
 206         }
 207         //if((config.dipswitch & FM7_DIPSW_CYCLESTEAL) != 0) subclock = subclock / 3;
 208 #endif
 209         event->set_context_cpu(maincpu, mainclock);
 210         event->set_context_cpu(subcpu,  subclock);
 211
 212 #ifdef WITH_Z80
 213         event->set_context_cpu(z80cpu,  4000000);
 214         z80cpu->write_signal(SIG_CPU_BUSREQ, 1, 1);
 215 #endif
 216
 217         event->set_context_sound(pcm1bit);
 218 #if defined(_FM8)
 219         event->set_context_sound(psg);
 220         event->set_context_sound(drec);
 221 #else
 222         event->set_context_sound(opn[0]);
 223         event->set_context_sound(opn[1]);
 224         event->set_context_sound(opn[2]);
 225 # if !defined(_FM77AV_VARIANTS)
 226         event->set_context_sound(psg);
 227 # endif
 228         event->set_context_sound(drec);
 229 # if defined(_FM77AV_VARIANTS)
 230         event->set_context_sound(keyboard_beep);
 231 # endif
 232 #endif
 233 #if !defined(_FM77AV_VARIANTS) && !defined(_FM77L4)
 234         event->register_frame_event(display);
 235 #endif
 236         mainio->set_context_maincpu(maincpu);
 237         mainio->set_context_subcpu(subcpu);
 238
 239         mainio->set_context_display(display);
 240 #if defined(_FM8) || defined(_FM7) || defined(_FMNEW7)
 241         if((config.dipswitch & FM7_DIPSW_CONNECT_KANJIROM) != 0) {
 242                 mainio->set_context_kanjirom_class1(kanjiclass1);
 243         }
 244 #else
 245         mainio->set_context_kanjirom_class1(kanjiclass1);
 246 #endif
 247         mainio->set_context_mainmem(mainmem);
 248         mainio->set_context_keyboard(keyboard);
 249         mainio->set_context_printer(printer);
 250         mainio->set_context_printer_reset(printer, SIG_PRINTER_RESET, 0xffffffff);
 251 #if defined(CAPABLE_KANJI_CLASS2)
 252         mainio->set_context_kanjirom_class2(kanjiclass2);
 253 #endif
 254
 255         keyboard->set_context_break_line(mainio, FM7_MAINIO_PUSH_BREAK, 0xffffffff);
 256         keyboard->set_context_int_line(mainio, FM7_MAINIO_KEYBOARDIRQ, 0xffffffff);
 257         keyboard->set_context_int_line(display, SIG_FM7_SUB_KEY_FIRQ, 0xffffffff);
 258 #if defined(_FM77AV_VARIANTS)
 259         keyboard->set_context_beep(keyboard_beep);
 260 #endif
 261         keyboard->set_context_rxrdy(display, SIG_FM7KEY_RXRDY, 0x01);
 262         keyboard->set_context_key_ack(display, SIG_FM7KEY_ACK, 0x01);
 263         keyboard->set_context_ins_led( led_terminate, SIG_DUMMYDEVICE_BIT0, 0xffffffff);
 264         keyboard->set_context_caps_led(led_terminate, SIG_DUMMYDEVICE_BIT1, 0xffffffff);
 265         keyboard->set_context_kana_led(led_terminate, SIG_DUMMYDEVICE_BIT2, 0xffffffff);
 266
 267         drec->set_context_ear(mainio, FM7_MAINIO_CMT_RECV, 0xffffffff);
 268         //drec->set_context_remote(mainio, FM7_MAINIO_CMT_REMOTE, 0xffffffff);
 269         mainio->set_context_datarec(drec);
 270
 271         mainmem->set_context_mainio(mainio);
 272         mainmem->set_context_display(display);
 273         mainmem->set_context_maincpu(maincpu);
 274 #if defined(CAPABLE_DICTROM)
 275         mainmem->set_context_kanjirom_class1(kanjiclass1);
 276 #endif
 277         display->set_context_mainio(mainio);
 278         display->set_context_subcpu(subcpu);
 279         display->set_context_keyboard(keyboard);
 280
 281         mainio->set_context_clock_status(mainmem, FM7_MAINIO_CLOCKMODE, 0xffffffff);
 282         mainio->set_context_clock_status(display, SIG_DISPLAY_CLOCK, 0xffffffff);
 283
 284         subcpu->set_context_bus_halt(display, SIG_FM7_SUB_HALT, 0xffffffff);
 285         subcpu->set_context_bus_halt(mainmem, SIG_FM7_SUB_HALT, 0xffffffff);
 286
 287 #if defined(_FM77_VARIANTS) || defined(_FM77AV_VARIANTS)
 288         display->set_context_kanjiclass1(kanjiclass1);
 289 #endif
 290 #if defined(CAPABLE_KANJI_CLASS2)
 291         display->set_context_kanjiclass2(kanjiclass2);
 292 #endif
 293 #if defined(_FM77AV_VARIANTS)
 294         display->set_context_alu(alu);
 295         alu->set_context_memory(display);
 296 #endif
 297         // Palette, VSYNC, HSYNC, Multi-page, display mode.
 298         mainio->set_context_display(display);
 299
 300         //FDC
 301         mainio->set_context_fdc(fdc);
 302         fdc->set_context_irq(mainio, FM7_MAINIO_FDC_IRQ, 0x1);
 303         fdc->set_context_drq(mainio, FM7_MAINIO_FDC_DRQ, 0x1);
 304         // SOUND
 305         mainio->set_context_beep(pcm1bit);
 306 #if defined(_FM8)
 307         mainio->set_context_psg(psg);
 308 #else
 309 # if !defined(_FM77AV_VARIANTS)
 310         mainio->set_context_psg(psg);
 311 # endif
 312         opn[0]->set_context_irq(mainio, FM7_MAINIO_OPN_IRQ, 0xffffffff);
 313         mainio->set_context_opn(opn[0], 0);
 314         //joystick->set_context_opn(opn[0]);
 315         mainio->set_context_joystick(joystick);
 316         opn[0]->set_context_port_b(joystick, FM7_JOYSTICK_MOUSE_STROBE, 0xff, 0);
 317
 318         opn[1]->set_context_irq(mainio, FM7_MAINIO_WHG_IRQ, 0xffffffff);
 319         mainio->set_context_opn(opn[1], 1);
 320         opn[2]->set_context_irq(mainio, FM7_MAINIO_THG_IRQ, 0xffffffff);
 321         mainio->set_context_opn(opn[2], 2);
 322 #endif
 323         subcpu->set_context_bus_halt(display, SIG_FM7_SUB_HALT, 0xffffffff);
 324         subcpu->set_context_bus_clr(display, SIG_FM7_SUB_USE_CLR, 0x0000000f);
 325
 326         event->register_frame_event(joystick);
 327 #if defined(HAS_DMA)
 328         dmac->set_context_src(fdc, 0);
 329         dmac->set_context_dst(mainmem, 0);
 330         dmac->set_context_int_line(mainio, 0, FM7_MAINIO_DMA_INT, 0xffffffff);
 331         dmac->set_context_drq_line(maincpu, 1, SIG_CPU_BUSREQ, 0xffffffff);
 332         mainio->set_context_dmac(dmac);
 333 #endif
 334         for(DEVICE* device = first_device; device; device = device->next_device) {
 335                 device->initialize();
 336         }
 337         for(int i = 0; i < 2; i++) {
 338 #if defined(_FM77AV20) || defined(_FM77AV40SX) || defined(_FM77AV40EX) || defined(_FM77AV40SX)
 339                 fdc->set_drive_type(i, DRIVE_TYPE_2DD);
 340 #else
 341                 fdc->set_drive_type(i, DRIVE_TYPE_2D);
 342 #endif
 343 #if defined(_FM77AV_VARIANTS)
 344                 fdc->set_drive_rpm(i, 360);
 345 #else
 346                 fdc->set_drive_rpm(i, 360);
 347 #endif
 348                 fdc->set_drive_mfm(i, true);
 349         }
 350 #if defined(_FM77) || defined(_FM77L4)
 351         for(int i = 2; i < 4; i++) {
 352                 fdc->set_drive_type(i, DRIVE_TYPE_2HD);
 353                 fdc->set_drive_rpm(i, 360);
 354                 fdc->set_drive_mfm(i, true);
 355         }
 356 #endif
 357
 358 }
 359
 360 void VM::update_config()
 361 {
 362         uint32 vol1, vol2, tmpv;
 363         int ii, i_limit;
 364
 365         for(DEVICE* device = first_device; device; device = device->next_device) {
 366                 device->update_config();
 367         }
 368         //update_dipswitch();
 369 }
 370
 371 void VM::reset()
 372 {
 373         // reset all devices
 374         for(DEVICE* device = first_device; device; device = device->next_device) {
 375                 device->reset();
 376         }
 377 }
 378
 379 void VM::special_reset()
 380 {
 381         // BREAK + RESET
 382         mainio->write_signal(FM7_MAINIO_PUSH_BREAK, 1, 1);
 383         mainio->reset();
 384         mainmem->reset();
 385
 386 #if defined(FM77AV_VARIANTS)
 387         mainio->write_signal(FM7_MAINIO_HOT_RESET, 1, 1);
 388 #endif
 389         display->reset();
 390         subcpu->reset();
 391         mainio->write_signal(FM7_MAINIO_PUSH_BREAK, 1, 1);
 392         maincpu->reset();
 393         event->register_event(mainio, EVENT_UP_BREAK, 10000.0 * 1000.0, false, NULL);
 394 }
 395
 396 void VM::run()
 397 {
 398         event->drive();
 399 }
 400
 401 double VM::get_frame_rate()
 402 {
 403         return event->get_frame_rate();
 404 }
 405
 406 #if defined(SUPPORT_DUMMY_DEVICE_LED)
 407 uint32 VM::get_led_status()
 408 {
 409         return led_terminate->read_signal(SIG_DUMMYDEVICE_READWRITE);
 410 }
 411 #endif // SUPPORT_DUMMY_DEVICE_LED
 412
 413
 414 // ----------------------------------------------------------------------------
 415 // debugger
 416 // ----------------------------------------------------------------------------
 417
 418 #ifdef USE_DEBUGGER
 419 DEVICE *VM::get_cpu(int index)
 420 {
 421         if(index == 0) {
 422                 return maincpu;
 423         } else if(index == 1) {
 424                 return subcpu;
 425         }
 426 #if defined(_WITH_Z80)
 427         else if(index == 2) {
 428                 return z80cpu;
 429         }
 430 #endif
 431         return NULL;
 432 }
 433 #endif
 434
 435 // ----------------------------------------------------------------------------
 436 // draw screen
 437 // ----------------------------------------------------------------------------
 438
 439 void VM::draw_screen()
 440 {
 441         display->draw_screen();
 442 }
 443
 444 int VM::get_access_lamp_status()
 445 {
 446         uint32 status = fdc->read_signal(0);
 447         return (status & (1 | 4)) ? 1 : (status & (2 | 8)) ? 2 : 0;
 448 }
 449
 450 void VM::initialize_sound(int rate, int samples)
 451 {
 452         // init sound manager
 453         event->initialize_sound(rate, samples);
 454         // init sound gen
 455 #if defined(_FM8)
 456         psg->initialize_sound(rate, (int)(4.9152 * 1000.0 * 1000.0 / 4.0), samples, 0, 0);
 457 #else
 458         opn[0]->initialize_sound(rate, (int)(4.9152 * 1000.0 * 1000.0 / 4.0), samples, 0, 0);
 459         opn[1]->initialize_sound(rate, (int)(4.9152 * 1000.0 * 1000.0 / 4.0), samples, 0, 0);
 460         opn[2]->initialize_sound(rate, (int)(4.9152 * 1000.0 * 1000.0 / 4.0), samples, 0, 0);
 461 # if !defined(_FM77AV_VARIANTS)
 462         psg->initialize_sound(rate, (int)(4.9152 * 1000.0 * 1000.0 / 4.0), samples, 0, 0);
 463 # endif
 464 # if defined(_FM77AV_VARIANTS)
 465         keyboard_beep->initialize_sound(rate, 2400.0, 512);
 466 # endif
 467 #endif
 468         pcm1bit->initialize_sound(rate, 2000);
 469         //drec->init_pcm(rate, 0);
 470 }
 471
 472 uint16* VM::create_sound(int* extra_frames)
 473 {
 474         uint16* p = event->create_sound(extra_frames);
 475         return p;
 476 }
 477
 478 int VM::get_sound_buffer_ptr()
 479 {
 480         int pos = event->get_sound_buffer_ptr();
 481         return pos;
 482 }
 483
 484 #ifdef USE_SOUND_VOLUME
 485 void VM::set_sound_device_volume(int ch, int decibel_l, int decibel_r)
 486 {
 487 #if !defined(_FM77AV_VARIANTS)
 488         if(ch-- == 0) {
 489                 psg->set_volume(0, decibel_l, decibel_r);
 490                 psg->set_volume(1, decibel_l, decibel_r);
 491         } else
 492 #endif
 493 #if !defined(_FM8)
 494         if(ch-- == 0) {
 495                 opn[0]->set_volume(0, decibel_l, decibel_r);
 496         } else if(ch-- == 0) {
 497                 opn[0]->set_volume(1, decibel_l, decibel_r);
 498         } else if(ch-- == 0) {
 499                 opn[1]->set_volume(0, decibel_l, decibel_r);
 500         } else if(ch-- == 0) {
 501                 opn[1]->set_volume(1, decibel_l, decibel_r);
 502         } else if(ch-- == 0) {
 503                 opn[2]->set_volume(0, decibel_l, decibel_r);
 504         } else if(ch-- == 0) {
 505                 opn[2]->set_volume(1, decibel_l, decibel_r);
 506         } else
 507 #endif
 508         if(ch-- == 0) {
 509                 pcm1bit->set_volume(0, decibel_l, decibel_r);
 510         } else if(ch-- == 0) {
 511                 drec->set_volume(0, decibel_l, decibel_r);
 512         }
 513 }
 514 #endif
 515
 516 // ----------------------------------------------------------------------------
 517 // notify key
 518 // ----------------------------------------------------------------------------
 519
 520 void VM::key_down(int code, bool repeat)
 521 {
 522         if(!repeat) {
 523                 keyboard->key_down(code);
 524         }
 525 }
 526
 527 void VM::key_up(int code)
 528 {
 529         keyboard->key_up(code);
 530 }
 531
 532 // ----------------------------------------------------------------------------
 533 // user interface
 534 // ----------------------------------------------------------------------------
 535
 536 void VM::open_floppy_disk(int drv, const _TCHAR* file_path, int bank)
 537 {
 538         fdc->open_disk(drv, file_path, bank);
 539 }
 540
 541 void VM::close_floppy_disk(int drv)
 542 {
 543         fdc->close_disk(drv);
 544 }
 545
 546 bool VM::is_floppy_disk_inserted(int drv)
 547 {
 548         return fdc->is_disk_inserted(drv);
 549 }
 550
 551 void VM::is_floppy_disk_protected(int drv, bool value)
 552 {
 553         fdc->is_disk_protected(drv, value);
 554 }
 555
 556 bool VM::is_floppy_disk_protected(int drv)
 557 {
 558         return fdc->is_disk_protected(drv);
 559 }
 560
 561 void VM::play_tape(const _TCHAR* file_path)
 562 {
 563         drec->play_tape(file_path);
 564 }
 565
 566 void VM::rec_tape(const _TCHAR* file_path)
 567 {
 568         drec->rec_tape(file_path);
 569 }
 570
 571 void VM::close_tape()
 572 {
 573         drec->close_tape();
 574 }
 575
 576 bool VM::is_tape_inserted()
 577 {
 578         return drec->is_tape_inserted();
 579 }
 580
 581 bool VM::is_tape_playing()
 582 {
 583         return drec->is_tape_playing();
 584 }
 585
 586 bool VM::is_tape_recording()
 587 {
 588         return drec->is_tape_recording();
 589 }
 590
 591 int VM::get_tape_position()
 592 {
 593         return drec->get_tape_position();
 594 }
 595
 596 void VM::push_play()
 597 {
 598         drec->set_ff_rew(0);
 599         drec->set_remote(true);
 600 }
 601
 602
 603 void VM::push_stop()
 604 {
 605         drec->set_remote(false);
 606 }
 607
 608 void VM::push_fast_forward()
 609 {
 610         drec->set_ff_rew(1);
 611         drec->set_remote(true);
 612 }
 613
 614 void VM::push_fast_rewind()
 615 {
 616         drec->set_ff_rew(-1);
 617         drec->set_remote(true);
 618 }
 619
 620 void VM::push_apss_forward()
 621 {
 622         drec->do_apss(1);
 623 }
 624
 625 void VM::push_apss_rewind()
 626 {
 627         drec->do_apss(-1);
 628 }
 629
 630 bool VM::is_frame_skippable()
 631 {
 632         return event->is_frame_skippable();
 633 }
 634
 635 void VM::update_dipswitch()
 636 {
 637         // bit0         0=High 1=Standard
 638         // bit2         0=5"2D 1=5"2HD
 639   //    io->set_iovalue_single_r(0x1ff0, (config.monitor_type & 1) | ((config.drive_type & 1) << 2));
 640 }
 641
 642 void VM::set_cpu_clock(DEVICE *cpu, uint32 clocks) {
 643         event->set_secondary_cpu_clock(cpu, clocks);
 644 }
 645
 646 #define STATE_VERSION   2
 647 void VM::save_state(FILEIO* state_fio)
 648 {
 649         state_fio->FputUint32_BE(STATE_VERSION);
 650
 651         for(DEVICE* device = first_device; device; device = device->next_device) {
 652                 device->save_state(state_fio);
 653         }
 654         { // V1
 655                 state_fio->FputBool(clock_low);
 656         }
 657 }
 658
 659 bool VM::load_state(FILEIO* state_fio)
 660 {
 661         uint32 version = state_fio->FgetUint32_BE();
 662         int i = 1;
 663         if(version > STATE_VERSION) {
 664                 return false;
 665         }
 666         for(DEVICE* device = first_device; device; device = device->next_device) {
 667                 if(!device->load_state(state_fio)) {
 668                         printf("Load Error: DEVID=%d\n", device->this_device_id);
 669                         return false;
 670                 }
 671         }
 672         if(version >= 1) {// V1
 673                 clock_low   = state_fio->FgetBool();
 674                 if(version == 2) return true;
 675         }
 676         return false;
 677 }
 678
 679 #ifdef USE_DIG_RESOLUTION
 680 void VM::get_screen_resolution(int *w, int *h)
 681 {
 682         switch(display->get_screen_mode()) {
 683         case DISPLAY_MODE_8_200L:
 684         case DISPLAY_MODE_8_200L_TEXT:
 685                 *w = 640;
 686                 *h = 200;
 687                 break;
 688         case DISPLAY_MODE_8_400L:
 689         case DISPLAY_MODE_8_400L_TEXT:
 690                 *w = 640;
 691                 *h = 400;
 692                 break;
 693         case DISPLAY_MODE_4096:
 694         case DISPLAY_MODE_256k:
 695                 *w = 320;
 696                 *h = 200;
 697                 break;
 698         default:
 699                 *w = 640;
 700                 *h = 200;
 701                 break;
 702         }
 703 }
 704 #endif
 705
 706 bool VM::is_screen_changed()
 707 {
 708         bool f = true;
 709 #if defined(USE_MINIMUM_RENDERING)
 710         f = display->screen_update();
 711         display->reset_screen_update();
 712 #endif
 713         return f;
 714 }