source/src/vm/pc100/pc100.cpp

   1 /*
   2         NEC PC-100 Emulator 'ePC-100'
   3
   4         Author : Takeda.Toshiya
   5         Date   : 2008.07.12 -
   6
   7         [ virtual machine ]
   8 */
   9
  10 #include "pc100.h"
  11 #include "../../emu.h"
  12 #include "../device.h"
  13 #include "../event.h"
  14
  15 #include "../and.h"
  16 #include "../beep.h"
  17 #include "../disk.h"
  18 #include "../i8251.h"
  19 #include "../i8255.h"
  20 #include "../i8259.h"
  21 #include "../i286.h"
  22 #include "../io.h"
  23 #include "../memory.h"
  24 #include "../msm58321.h"
  25 #include "../noise.h"
  26 #include "../pcm1bit.h"
  27 #include "../upd765a.h"
  28
  29 #ifdef USE_DEBUGGER
  30 #include "../debugger.h"
  31 #endif
  32
  33 #include "crtc.h"
  34 #include "ioctrl.h"
  35 #include "kanji.h"
  36
  37 // ----------------------------------------------------------------------------
  38 // initialize
  39 // ----------------------------------------------------------------------------
  40
  41 VM::VM(EMU* parent_emu) : emu(parent_emu)
  42 {
  43         // create devices
  44         first_device = last_device = NULL;
  45         dummy = new DEVICE(this, emu);  // must be 1st device
  46         event = new EVENT(this, emu);   // must be 2nd device
  47
  48         and_drq = new AND(this, emu);
  49         beep = new BEEP(this, emu);
  50         sio = new I8251(this, emu);
  51         pio0 = new I8255(this, emu);
  52         pio0->set_device_name(_T("8255 PIO (RTC)"));
  53         pio1 = new I8255(this, emu);
  54         pio1->set_device_name(_T("8255 PIO (CRTC)"));
  55         pic = new I8259(this, emu);
  56         cpu = new I286(this, emu);
  57         io = new IO(this, emu);
  58         memory = new MEMORY(this, emu);
  59         rtc = new MSM58321(this, emu);
  60         pcm = new PCM1BIT(this, emu);
  61         fdc = new UPD765A(this, emu);
  62         fdc->set_context_noise_seek(new NOISE(this, emu));
  63         fdc->set_context_noise_head_down(new NOISE(this, emu));
  64         fdc->set_context_noise_head_up(new NOISE(this, emu));
  65
  66         crtc = new CRTC(this, emu);
  67         ioctrl = new IOCTRL(this, emu);
  68         kanji = new KANJI(this, emu);
  69
  70         // set contexts
  71         event->set_context_cpu(cpu);
  72         event->set_context_sound(beep);
  73         event->set_context_sound(pcm);
  74         event->set_context_sound(fdc->get_context_noise_seek());
  75         event->set_context_sound(fdc->get_context_noise_head_down());
  76         event->set_context_sound(fdc->get_context_noise_head_up());
  77
  78         and_drq->set_context_out(cpu, SIG_CPU_NMI, 1);
  79         and_drq->set_mask(SIG_AND_BIT_0 | SIG_AND_BIT_1);
  80         sio->set_context_rxrdy(pic, SIG_I8259_IR1, 1);
  81         pio0->set_context_port_a(rtc, SIG_MSM58321_READ, 1, 0);
  82         pio0->set_context_port_a(rtc, SIG_MSM58321_WRITE, 2, 0);
  83         pio0->set_context_port_a(rtc, SIG_MSM58321_ADDR_WRITE, 4, 0);
  84         pio0->set_context_port_c(rtc, SIG_MSM58321_DATA, 0x0f, 0);
  85         pio1->set_context_port_a(crtc, SIG_CRTC_BITMASK_LOW, 0xff, 0);
  86         pio1->set_context_port_b(crtc, SIG_CRTC_BITMASK_HIGH, 0xff, 0);
  87         pio1->set_context_port_c(crtc, SIG_CRTC_VRAM_PLANE, 0x3f, 0);
  88         pio1->set_context_port_c(and_drq, SIG_AND_BIT_0, 0x80, 0);
  89         pio1->set_context_port_c(ioctrl, SIG_IOCTRL_RESET, 0x40, 0);
  90         pic->set_context_cpu(cpu);
  91         rtc->set_context_data(pio0, SIG_I8255_PORT_C, 0x0f, 0);
  92         rtc->set_context_busy(pio0, SIG_I8255_PORT_C, 0x10);
  93         fdc->set_context_irq(cpu, SIG_CPU_NMI, 1);
  94         fdc->set_context_drq(and_drq, SIG_AND_BIT_1, 1);
  95
  96         crtc->set_context_pic(pic);
  97         ioctrl->set_context_pic(pic);
  98         ioctrl->set_context_fdc(fdc);
  99         ioctrl->set_context_beep(beep);
 100         ioctrl->set_context_pcm(pcm);
 101
 102         // cpu bus
 103         cpu->set_context_mem(memory);
 104         cpu->set_context_io(io);
 105         cpu->set_context_intr(pic);
 106 #ifdef USE_DEBUGGER
 107         cpu->set_context_debugger(new DEBUGGER(this, emu));
 108 #endif
 109
 110         // memory bus
 111         memset(ram, 0, sizeof(ram));
 112         memset(ipl, 0xff, sizeof(ipl));
 113
 114         memory->read_bios(_T("IPL.ROM"), ipl, sizeof(ipl));
 115
 116         memory->set_memory_rw(0x00000, 0xbffff, ram);
 117         memory->set_memory_mapped_io_rw(0xc0000, 0xdffff, crtc);
 118         memory->set_memory_r(0xf8000, 0xfffff, ipl);
 119
 120         // i/o bus
 121         io->set_iomap_alias_rw(0x00, pic, 0);
 122         io->set_iomap_alias_rw(0x02, pic, 1);
 123 //      io->set_iomap_alias_rw(0x04, dma, 0);
 124 //      io->set_iomap_alias_rw(0x06, dma, 1);
 125         io->set_iomap_alias_r(0x08, fdc, 0);
 126         io->set_iomap_alias_rw(0x0a, fdc, 1);
 127         io->set_iomap_alias_rw(0x10, pio0, 0);
 128         io->set_iomap_alias_rw(0x12, pio0, 1);
 129         io->set_iomap_alias_rw(0x14, pio0, 2);
 130         io->set_iomap_alias_rw(0x16, pio0, 3);
 131         io->set_iomap_alias_rw(0x18, pio1, 0);
 132         io->set_iomap_alias_rw(0x1a, pio1, 1);
 133         io->set_iomap_alias_rw(0x1c, pio1, 2);
 134         io->set_iomap_alias_rw(0x1e, pio1, 3);
 135         io->set_iomap_single_r(0x20, ioctrl);
 136         io->set_iomap_single_rw(0x22, ioctrl);
 137         io->set_iomap_single_w(0x24, ioctrl);
 138         io->set_iomap_alias_rw(0x28, sio, 0);
 139         io->set_iomap_alias_rw(0x2a, sio, 1);
 140         io->set_iomap_single_rw(0x30, crtc);
 141         io->set_iomap_single_rw(0x38, crtc);
 142         io->set_iomap_single_rw(0x3a, crtc);
 143         io->set_iomap_single_rw(0x3c, crtc);
 144         io->set_iomap_single_rw(0x3e, crtc);
 145         for(int i = 0x40; i < 0x62; i++) {
 146                 io->set_iomap_single_rw(i, crtc);
 147         }
 148         io->set_iomap_single_rw(0x80, kanji);
 149         io->set_iomap_single_rw(0x81, kanji);
 150         io->set_iomap_single_w(0x84, kanji);
 151         io->set_iomap_single_w(0x86, kanji);
 152
 153         // initialize all devices
 154         for(DEVICE* device = first_device; device; device = device->next_device) {
 155                 device->initialize();
 156         }
 157 }
 158
 159 VM::~VM()
 160 {
 161         // delete all devices
 162         for(DEVICE* device = first_device; device;) {
 163                 DEVICE *next_device = device->next_device;
 164                 device->release();
 165                 delete device;
 166                 device = next_device;
 167         }
 168 }
 169
 170 DEVICE* VM::get_device(int id)
 171 {
 172         for(DEVICE* device = first_device; device; device = device->next_device) {
 173                 if(device->this_device_id == id) {
 174                         return device;
 175                 }
 176         }
 177         return NULL;
 178 }
 179
 180 // ----------------------------------------------------------------------------
 181 // drive virtual machine
 182 // ----------------------------------------------------------------------------
 183
 184 void VM::reset()
 185 {
 186         // reset all devices
 187         for(DEVICE* device = first_device; device; device = device->next_device) {
 188                 device->reset();
 189         }
 190         for(int i = 0; i < 4; i++) {
 191                 if(config.drive_type) {
 192                         fdc->set_drive_type(i, DRIVE_TYPE_2DD);
 193                 } else {
 194                         fdc->set_drive_type(i, DRIVE_TYPE_2D);
 195                 }
 196         }
 197 }
 198
 199 void VM::run()
 200 {
 201         event->drive();
 202 }
 203
 204 // ----------------------------------------------------------------------------
 205 // debugger
 206 // ----------------------------------------------------------------------------
 207
 208 #ifdef USE_DEBUGGER
 209 DEVICE *VM::get_cpu(int index)
 210 {
 211         if(index == 0) {
 212                 return cpu;
 213         }
 214         return NULL;
 215 }
 216 #endif
 217
 218 // ----------------------------------------------------------------------------
 219 // draw screen
 220 // ----------------------------------------------------------------------------
 221
 222 void VM::draw_screen()
 223 {
 224         crtc->draw_screen();
 225 }
 226
 227 // ----------------------------------------------------------------------------
 228 // soud manager
 229 // ----------------------------------------------------------------------------
 230
 231 void VM::initialize_sound(int rate, int samples)
 232 {
 233         // init sound manager
 234         event->initialize_sound(rate, samples);
 235
 236         // init sound gen
 237         beep->initialize_sound(rate, 2400, 8000);
 238         pcm->initialize_sound(rate, 8000);
 239 }
 240
 241 uint16_t* VM::create_sound(int* extra_frames)
 242 {
 243         return event->create_sound(extra_frames);
 244 }
 245
 246 int VM::get_sound_buffer_ptr()
 247 {
 248         return event->get_sound_buffer_ptr();
 249 }
 250
 251 #ifdef USE_SOUND_VOLUME
 252 void VM::set_sound_device_volume(int ch, int decibel_l, int decibel_r)
 253 {
 254         if(ch == 0) {
 255                 beep->set_volume(0, decibel_l, decibel_r);
 256         } else if(ch == 1) {
 257                 pcm->set_volume(0, decibel_l, decibel_r);
 258         } else if(ch == 2) {
 259                 fdc->get_context_noise_seek()->set_volume(0, decibel_l, decibel_r);
 260                 fdc->get_context_noise_head_down()->set_volume(0, decibel_l, decibel_r);
 261                 fdc->get_context_noise_head_up()->set_volume(0, decibel_l, decibel_r);
 262         }
 263 }
 264 #endif
 265
 266 // ----------------------------------------------------------------------------
 267 // notify key
 268 // ----------------------------------------------------------------------------
 269
 270 void VM::key_down(int code, bool repeat)
 271 {
 272         ioctrl->key_down(code);
 273 }
 274
 275 void VM::key_up(int code)
 276 {
 277         ioctrl->key_up(code);
 278 }
 279
 280 bool VM::get_caps_locked()
 281 {
 282         return ioctrl->get_caps_locked();
 283 }
 284
 285 bool VM::get_kana_locked()
 286 {
 287         return ioctrl->get_kana_locked();
 288 }
 289
 290 // ----------------------------------------------------------------------------
 291 // user interface
 292 // ----------------------------------------------------------------------------
 293
 294 void VM::open_floppy_disk(int drv, const _TCHAR* file_path, int bank)
 295 {
 296         fdc->open_disk(drv, file_path, bank);
 297 }
 298
 299 void VM::close_floppy_disk(int drv)
 300 {
 301         fdc->close_disk(drv);
 302 }
 303
 304 bool VM::is_floppy_disk_inserted(int drv)
 305 {
 306         return fdc->is_disk_inserted(drv);
 307 }
 308
 309 void VM::is_floppy_disk_protected(int drv, bool value)
 310 {
 311         fdc->is_disk_protected(drv, value);
 312 }
 313
 314 bool VM::is_floppy_disk_protected(int drv)
 315 {
 316         return fdc->is_disk_protected(drv);
 317 }
 318
 319 uint32_t VM::is_floppy_disk_accessed()
 320 {
 321         return fdc->read_signal(0);
 322 }
 323
 324 bool VM::is_frame_skippable()
 325 {
 326         return event->is_frame_skippable();
 327 }
 328
 329 void VM::update_config()
 330 {
 331         for(DEVICE* device = first_device; device; device = device->next_device) {
 332                 device->update_config();
 333         }
 334 }
 335
 336 #define STATE_VERSION   3
 337
 338 void VM::save_state(FILEIO* state_fio)
 339 {
 340         state_fio->FputUint32(STATE_VERSION);
 341
 342         for(DEVICE* device = first_device; device; device = device->next_device) {
 343                 const char *name = typeid(*device).name() + 6; // skip "class "
 344
 345                 state_fio->FputInt32(strlen(name));
 346                 state_fio->Fwrite(name, strlen(name), 1);
 347                 device->save_state(state_fio);
 348         }
 349         state_fio->Fwrite(ram, sizeof(ram), 1);
 350 }
 351
 352 bool VM::load_state(FILEIO* state_fio)
 353 {
 354         if(state_fio->FgetUint32() != STATE_VERSION) {
 355                 return false;
 356         }
 357         for(DEVICE* device = first_device; device; device = device->next_device) {
 358                 const char *name = typeid(*device).name() + 6; // skip "class "
 359
 360                 if(!(state_fio->FgetInt32() == strlen(name) && state_fio->Fcompare(name, strlen(name)))) {
 361                         return false;
 362                 }
 363                 if(!device->load_state(state_fio)) {
 364                         return false;
 365                 }
 366         }
 367         state_fio->Fread(ram, sizeof(ram), 1);
 368         return true;
 369 }
 370