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 "../i86.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 I86(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         for(int i = 0; i < 4; i++) {
 158                 fdc->set_drive_type(i, DRIVE_TYPE_2D);
 159         }
 160 }
 161
 162 VM::~VM()
 163 {
 164         // delete all devices
 165         for(DEVICE* device = first_device; device;) {
 166                 DEVICE *next_device = device->next_device;
 167                 device->release();
 168                 delete device;
 169                 device = next_device;
 170         }
 171 }
 172
 173 DEVICE* VM::get_device(int id)
 174 {
 175         for(DEVICE* device = first_device; device; device = device->next_device) {
 176                 if(device->this_device_id == id) {
 177                         return device;
 178                 }
 179         }
 180         return NULL;
 181 }
 182
 183 // ----------------------------------------------------------------------------
 184 // drive virtual machine
 185 // ----------------------------------------------------------------------------
 186
 187 void VM::reset()
 188 {
 189         // reset all devices
 190         for(DEVICE* device = first_device; device; device = device->next_device) {
 191                 device->reset();
 192         }
 193 }
 194
 195 void VM::run()
 196 {
 197         event->drive();
 198 }
 199
 200 // ----------------------------------------------------------------------------
 201 // debugger
 202 // ----------------------------------------------------------------------------
 203
 204 #ifdef USE_DEBUGGER
 205 DEVICE *VM::get_cpu(int index)
 206 {
 207         if(index == 0) {
 208                 return cpu;
 209         }
 210         return NULL;
 211 }
 212 #endif
 213
 214 // ----------------------------------------------------------------------------
 215 // draw screen
 216 // ----------------------------------------------------------------------------
 217
 218 void VM::draw_screen()
 219 {
 220         crtc->draw_screen();
 221 }
 222
 223 // ----------------------------------------------------------------------------
 224 // soud manager
 225 // ----------------------------------------------------------------------------
 226
 227 void VM::initialize_sound(int rate, int samples)
 228 {
 229         // init sound manager
 230         event->initialize_sound(rate, samples);
 231
 232         // init sound gen
 233         beep->initialize_sound(rate, 2400, 8000);
 234         pcm->initialize_sound(rate, 8000);
 235 }
 236
 237 uint16_t* VM::create_sound(int* extra_frames)
 238 {
 239         return event->create_sound(extra_frames);
 240 }
 241
 242 int VM::get_sound_buffer_ptr()
 243 {
 244         return event->get_sound_buffer_ptr();
 245 }
 246
 247 #ifdef USE_SOUND_VOLUME
 248 void VM::set_sound_device_volume(int ch, int decibel_l, int decibel_r)
 249 {
 250         if(ch == 0) {
 251                 beep->set_volume(0, decibel_l, decibel_r);
 252         } else if(ch == 1) {
 253                 pcm->set_volume(0, decibel_l, decibel_r);
 254         } else if(ch == 2) {
 255                 fdc->get_context_noise_seek()->set_volume(0, decibel_l, decibel_r);
 256                 fdc->get_context_noise_head_down()->set_volume(0, decibel_l, decibel_r);
 257                 fdc->get_context_noise_head_up()->set_volume(0, decibel_l, decibel_r);
 258         }
 259 }
 260 #endif
 261
 262 // ----------------------------------------------------------------------------
 263 // notify key
 264 // ----------------------------------------------------------------------------
 265
 266 void VM::key_down(int code, bool repeat)
 267 {
 268         ioctrl->key_down(code);
 269 }
 270
 271 void VM::key_up(int code)
 272 {
 273         ioctrl->key_up(code);
 274 }
 275
 276 bool VM::get_caps_locked()
 277 {
 278         return ioctrl->get_caps_locked();
 279 }
 280
 281 bool VM::get_kana_locked()
 282 {
 283         return ioctrl->get_kana_locked();
 284 }
 285
 286 // ----------------------------------------------------------------------------
 287 // user interface
 288 // ----------------------------------------------------------------------------
 289
 290 void VM::open_floppy_disk(int drv, const _TCHAR* file_path, int bank)
 291 {
 292         fdc->open_disk(drv, file_path, bank);
 293 }
 294
 295 void VM::close_floppy_disk(int drv)
 296 {
 297         fdc->close_disk(drv);
 298 }
 299
 300 bool VM::is_floppy_disk_inserted(int drv)
 301 {
 302         return fdc->is_disk_inserted(drv);
 303 }
 304
 305 void VM::is_floppy_disk_protected(int drv, bool value)
 306 {
 307         fdc->is_disk_protected(drv, value);
 308 }
 309
 310 bool VM::is_floppy_disk_protected(int drv)
 311 {
 312         return fdc->is_disk_protected(drv);
 313 }
 314
 315 uint32_t VM::is_floppy_disk_accessed()
 316 {
 317         return fdc->read_signal(0);
 318 }
 319
 320 bool VM::is_frame_skippable()
 321 {
 322         return event->is_frame_skippable();
 323 }
 324
 325 void VM::update_config()
 326 {
 327         for(DEVICE* device = first_device; device; device = device->next_device) {
 328                 device->update_config();
 329         }
 330 }
 331
 332 #define STATE_VERSION   2
 333
 334 void VM::save_state(FILEIO* state_fio)
 335 {
 336         state_fio->FputUint32(STATE_VERSION);
 337
 338         for(DEVICE* device = first_device; device; device = device->next_device) {
 339                 device->save_state(state_fio);
 340         }
 341         state_fio->Fwrite(ram, sizeof(ram), 1);
 342 }
 343
 344 bool VM::load_state(FILEIO* state_fio)
 345 {
 346         if(state_fio->FgetUint32() != STATE_VERSION) {
 347                 return false;
 348         }
 349         for(DEVICE* device = first_device; device; device = device->next_device) {
 350                 if(!device->load_state(state_fio)) {
 351                         return false;
 352                 }
 353         }
 354         state_fio->Fread(ram, sizeof(ram), 1);
 355         return true;
 356 }
 357