source/src/vm/fm7/fm7.cpp

   1 /*
   2  * FM7 -> VM
   3  * (C) 2015 K.Ohta <whatisthis.sowhat _at_ gmail.com>
   4  * History:
   5  *   Feb 27, 2015 : Initial
   6  */
   7
   8 #include "fm7.h"
   9 #include "../../emu.h"
  10 #include "../../config.h"
  11 #include "../device.h"
  12 #include "../event.h"
  13 #include "../memory.h"
  14 #include "../prnfile.h"
  15
  16 #ifdef USE_DEBUGGER
  17 #include "../debugger.h"
  18 #endif
  19
  20 #include "../datarec.h"
  21 #include "../disk.h"
  22
  23 #include "../mc6809.h"
  24 #include "../z80.h"
  25 #include "../mb8877.h"
  26
  27 #include "../pcm1bit.h"
  28 #include "../ym2203.h"
  29 #if defined(_FM77AV_VARIANTS)
  30 #include "mb61vh010.h"
  31 #include "../beep.h"
  32 #endif
  33 #if defined(HAS_DMA)
  34 #include "hd6844.h"
  35 #endif
  36
  37 #if defined(USE_LED_DEVICE)
  38 #include "./dummydevice.h"
  39 #else
  40 #define SIG_DUMMYDEVICE_BIT0 0
  41 #define SIG_DUMMYDEVICE_BIT1 1
  42 #define SIG_DUMMYDEVICE_BIT2 2
  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(USE_LED_DEVICE)
 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_t mainclock;
 169         uint32_t 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(_FM77AV20EX) || \
 339         defined(_FM77AV40SX) || defined(_FM77AV40EX) || defined(_FM77AV40SX)
 340                 fdc->set_drive_type(i, DRIVE_TYPE_2DD);
 341 #else
 342                 fdc->set_drive_type(i, DRIVE_TYPE_2D);
 343 #endif
 344 #if defined(_FM77AV_VARIANTS)
 345                 fdc->set_drive_rpm(i, 360);
 346 #else
 347                 fdc->set_drive_rpm(i, 360);
 348 #endif
 349                 fdc->set_drive_mfm(i, true);
 350         }
 351 #if defined(_FM77) || defined(_FM77L4)
 352         for(int i = 2; i < 4; i++) {
 353                 fdc->set_drive_type(i, DRIVE_TYPE_2HD);
 354                 fdc->set_drive_rpm(i, 360);
 355                 fdc->set_drive_mfm(i, true);
 356         }
 357 #endif
 358
 359 }
 360
 361 void VM::update_config()
 362 {
 363         uint32_t vol1, vol2, tmpv;
 364         int ii, i_limit;
 365
 366         for(DEVICE* device = first_device; device; device = device->next_device) {
 367                 device->update_config();
 368         }
 369         //update_dipswitch();
 370 }
 371
 372 void VM::reset()
 373 {
 374         // reset all devices
 375         for(DEVICE* device = first_device; device; device = device->next_device) {
 376                 device->reset();
 377         }
 378 #if !defined(_FM77AV_VARIANTS) || defined(_FM8)
 379         psg->set_reg(0x27, 0); // stop timer
 380         psg->set_reg(0x2e, 0);  // set prescaler
 381         psg->write_signal(SIG_YM2203_MUTE, 0x00, 0x01); // Okay?
 382 #endif
 383 #if !defined(_FM8)
 384         for(int i = 0; i < 3; i++) {
 385                 opn[i]->set_reg(0x27, 0); // stop timer
 386                 opn[i]->set_reg(0x2e, 0);       // set prescaler
 387                 opn[i]->write_signal(SIG_YM2203_MUTE, 0x00, 0x01); // Okay?
 388         }
 389 #endif
 390 }
 391
 392 void VM::special_reset()
 393 {
 394         // BREAK + RESET
 395         mainio->write_signal(FM7_MAINIO_PUSH_BREAK, 1, 1);
 396         mainio->reset();
 397         mainmem->reset();
 398
 399 #if defined(FM77AV_VARIANTS)
 400         mainio->write_signal(FM7_MAINIO_HOT_RESET, 1, 1);
 401 #endif
 402         display->reset();
 403         subcpu->reset();
 404         mainio->write_signal(FM7_MAINIO_PUSH_BREAK, 1, 1);
 405         maincpu->reset();
 406         event->register_event(mainio, EVENT_UP_BREAK, 10000.0 * 1000.0, false, NULL);
 407 }
 408
 409 void VM::run()
 410 {
 411         event->drive();
 412 }
 413
 414 double VM::get_frame_rate()
 415 {
 416         return event->get_frame_rate();
 417 }
 418
 419 #if defined(USE_LED_DEVICE)
 420 uint32_t VM::get_led_status()
 421 {
 422         return led_terminate->read_signal(SIG_DUMMYDEVICE_READWRITE);
 423 }
 424 #endif // USE_LED_DEVICE
 425
 426
 427 // ----------------------------------------------------------------------------
 428 // debugger
 429 // ----------------------------------------------------------------------------
 430
 431 #ifdef USE_DEBUGGER
 432 DEVICE *VM::get_cpu(int index)
 433 {
 434         if(index == 0) {
 435                 return maincpu;
 436         } else if(index == 1) {
 437                 return subcpu;
 438         }
 439 #if defined(_WITH_Z80)
 440         else if(index == 2) {
 441                 return z80cpu;
 442         }
 443 #endif
 444         return NULL;
 445 }
 446 #endif
 447
 448 // ----------------------------------------------------------------------------
 449 // draw screen
 450 // ----------------------------------------------------------------------------
 451
 452 void VM::draw_screen()
 453 {
 454         display->draw_screen();
 455 }
 456
 457 uint32_t VM::get_access_lamp_status()
 458 {
 459         uint32_t status = fdc->read_signal(0);
 460         return (status & (1 | 4)) ? 1 : (status & (2 | 8)) ? 2 : 0;
 461 }
 462
 463 void VM::initialize_sound(int rate, int samples)
 464 {
 465         // init sound manager
 466         event->initialize_sound(rate, samples);
 467         // init sound gen
 468 #if defined(_FM8)
 469         psg->initialize_sound(rate, (int)(4.9152 * 1000.0 * 1000.0 / 4.0), samples, 0, 0);
 470 #else
 471         opn[0]->initialize_sound(rate, (int)(4.9152 * 1000.0 * 1000.0 / 4.0), samples, 0, 0);
 472         opn[1]->initialize_sound(rate, (int)(4.9152 * 1000.0 * 1000.0 / 4.0), samples, 0, 0);
 473         opn[2]->initialize_sound(rate, (int)(4.9152 * 1000.0 * 1000.0 / 4.0), samples, 0, 0);
 474 # if !defined(_FM77AV_VARIANTS)
 475         psg->initialize_sound(rate, (int)(4.9152 * 1000.0 * 1000.0 / 4.0), samples, 0, 0);
 476 # endif
 477 # if defined(_FM77AV_VARIANTS)
 478         keyboard_beep->initialize_sound(rate, 2400.0, 512);
 479 # endif
 480 #endif
 481         pcm1bit->initialize_sound(rate, 2000);
 482         //drec->init_pcm(rate, 0);
 483 }
 484
 485 uint16* VM::create_sound(int* extra_frames)
 486 {
 487         uint16* p = event->create_sound(extra_frames);
 488         return p;
 489 }
 490
 491 int VM::get_sound_buffer_ptr()
 492 {
 493         int pos = event->get_sound_buffer_ptr();
 494         return pos;
 495 }
 496
 497 #ifdef USE_SOUND_VOLUME
 498 void VM::set_sound_device_volume(int ch, int decibel_l, int decibel_r)
 499 {
 500 #if !defined(_FM77AV_VARIANTS)
 501         if(ch-- == 0) {
 502                 psg->set_volume(0, decibel_l, decibel_r);
 503                 psg->set_volume(1, decibel_l, decibel_r);
 504         } else
 505 #endif
 506 #if !defined(_FM8)
 507         if(ch-- == 0) {
 508                 opn[0]->set_volume(0, decibel_l, decibel_r);
 509         } else if(ch-- == 0) {
 510                 opn[0]->set_volume(1, decibel_l, decibel_r);
 511         } else if(ch-- == 0) {
 512                 opn[1]->set_volume(0, decibel_l, decibel_r);
 513         } else if(ch-- == 0) {
 514                 opn[1]->set_volume(1, decibel_l, decibel_r);
 515         } else if(ch-- == 0) {
 516                 opn[2]->set_volume(0, decibel_l, decibel_r);
 517         } else if(ch-- == 0) {
 518                 opn[2]->set_volume(1, decibel_l, decibel_r);
 519         } else
 520 #endif
 521         if(ch-- == 0) {
 522                 pcm1bit->set_volume(0, decibel_l, decibel_r);
 523         } else if(ch-- == 0) {
 524                 drec->set_volume(0, decibel_l, decibel_r);
 525         }
 526 }
 527 #endif
 528
 529 // ----------------------------------------------------------------------------
 530 // notify key
 531 // ----------------------------------------------------------------------------
 532
 533 void VM::key_down(int code, bool repeat)
 534 {
 535         if(!repeat) {
 536                 keyboard->key_down(code);
 537         }
 538 }
 539
 540 void VM::key_up(int code)
 541 {
 542         keyboard->key_up(code);
 543 }
 544
 545 // ----------------------------------------------------------------------------
 546 // user interface
 547 // ----------------------------------------------------------------------------
 548
 549 void VM::open_floppy_disk(int drv, const _TCHAR* file_path, int bank)
 550 {
 551         fdc->open_disk(drv, file_path, bank);
 552 }
 553
 554 void VM::close_floppy_disk(int drv)
 555 {
 556         fdc->close_disk(drv);
 557 }
 558
 559 bool VM::is_floppy_disk_inserted(int drv)
 560 {
 561         return fdc->is_disk_inserted(drv);
 562 }
 563
 564 void VM::is_floppy_disk_protected(int drv, bool value)
 565 {
 566         fdc->is_disk_protected(drv, value);
 567 }
 568
 569 bool VM::is_floppy_disk_protected(int drv)
 570 {
 571         return fdc->is_disk_protected(drv);
 572 }
 573
 574 void VM::play_tape(const _TCHAR* file_path)
 575 {
 576         drec->play_tape(file_path);
 577 }
 578
 579 void VM::rec_tape(const _TCHAR* file_path)
 580 {
 581         drec->rec_tape(file_path);
 582 }
 583
 584 void VM::close_tape()
 585 {
 586         drec->close_tape();
 587 }
 588
 589 bool VM::is_tape_inserted()
 590 {
 591         return drec->is_tape_inserted();
 592 }
 593
 594 bool VM::is_tape_playing()
 595 {
 596         return drec->is_tape_playing();
 597 }
 598
 599 bool VM::is_tape_recording()
 600 {
 601         return drec->is_tape_recording();
 602 }
 603
 604 int VM::get_tape_position()
 605 {
 606         return drec->get_tape_position();
 607 }
 608
 609 void VM::push_play()
 610 {
 611         drec->set_ff_rew(0);
 612         drec->set_remote(true);
 613 }
 614
 615
 616 void VM::push_stop()
 617 {
 618         drec->set_remote(false);
 619 }
 620
 621 void VM::push_fast_forward()
 622 {
 623         drec->set_ff_rew(1);
 624         drec->set_remote(true);
 625 }
 626
 627 void VM::push_fast_rewind()
 628 {
 629         drec->set_ff_rew(-1);
 630         drec->set_remote(true);
 631 }
 632
 633 void VM::push_apss_forward()
 634 {
 635         drec->do_apss(1);
 636 }
 637
 638 void VM::push_apss_rewind()
 639 {
 640         drec->do_apss(-1);
 641 }
 642
 643 bool VM::is_frame_skippable()
 644 {
 645         return event->is_frame_skippable();
 646 }
 647
 648 void VM::update_dipswitch()
 649 {
 650         // bit0         0=High 1=Standard
 651         // bit2         0=5"2D 1=5"2HD
 652   //    io->set_iovalue_single_r(0x1ff0, (config.monitor_type & 1) | ((config.drive_type & 1) << 2));
 653 }
 654
 655 void VM::set_cpu_clock(DEVICE *cpu, uint32_t clocks) {
 656         event->set_secondary_cpu_clock(cpu, clocks);
 657 }
 658
 659 #define STATE_VERSION   2
 660 void VM::save_state(FILEIO* state_fio)
 661 {
 662         state_fio->FputUint32_BE(STATE_VERSION);
 663
 664         for(DEVICE* device = first_device; device; device = device->next_device) {
 665                 device->save_state(state_fio);
 666         }
 667         { // V1
 668                 state_fio->FputBool(clock_low);
 669         }
 670 }
 671
 672 bool VM::load_state(FILEIO* state_fio)
 673 {
 674         uint32_t version = state_fio->FgetUint32_BE();
 675         int i = 1;
 676         if(version > STATE_VERSION) {
 677                 return false;
 678         }
 679         for(DEVICE* device = first_device; device; device = device->next_device) {
 680                 if(!device->load_state(state_fio)) {
 681                         printf("Load Error: DEVID=%d\n", device->this_device_id);
 682                         return false;
 683                 }
 684         }
 685         if(version >= 1) {// V1
 686                 clock_low   = state_fio->FgetBool();
 687                 if(version == 2) return true;
 688         }
 689         return false;
 690 }
 691
 692 #ifdef USE_DIG_RESOLUTION
 693 void VM::get_screen_resolution(int *w, int *h)
 694 {
 695         switch(display->get_screen_mode()) {
 696         case DISPLAY_MODE_8_200L:
 697         case DISPLAY_MODE_8_200L_TEXT:
 698                 *w = 640;
 699                 *h = 200;
 700                 break;
 701         case DISPLAY_MODE_8_400L:
 702         case DISPLAY_MODE_8_400L_TEXT:
 703                 *w = 640;
 704                 *h = 400;
 705                 break;
 706         case DISPLAY_MODE_4096:
 707         case DISPLAY_MODE_256k:
 708                 *w = 320;
 709                 *h = 200;
 710                 break;
 711         default:
 712                 *w = 640;
 713                 *h = 200;
 714                 break;
 715         }
 716 }
 717 #endif
 718
 719 bool VM::is_screen_changed()
 720 {
 721         bool f = true;
 722 #if defined(USE_MINIMUM_RENDERING)
 723         f = display->screen_update();
 724         display->reset_screen_update();
 725 #endif
 726         return f;
 727 }