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 "../pcm1bit.h"
  26 #include "../upd765a.h"
  27
  28 #ifdef USE_DEBUGGER
  29 #include "../debugger.h"
  30 #endif
  31
  32 #include "crtc.h"
  33 #include "ioctrl.h"
  34 #include "kanji.h"
  35
  36 // ----------------------------------------------------------------------------
  37 // initialize
  38 // ----------------------------------------------------------------------------
  39
  40 VM::VM(EMU* parent_emu) : emu(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 #if defined(_USE_QT)
  47         dummy->set_device_name(_T("1st Dummy"));
  48         event->set_device_name(_T("EVENT"));
  49 #endif
  50
  51         and_drq = new AND(this, emu);
  52         beep = new BEEP(this, emu);
  53         sio = new I8251(this, emu);
  54         pio0 = new I8255(this, emu);
  55         pio1 = new I8255(this, emu);
  56         pic = new I8259(this, emu);
  57         cpu = new I286(this, emu);
  58         io = new IO(this, emu);
  59         memory = new MEMORY(this, emu);
  60         rtc = new MSM58321(this, emu);
  61         pcm = new PCM1BIT(this, emu);
  62         fdc = new UPD765A(this, emu);
  63 #if defined(_USE_QT)
  64         and_drq->set_device_name(_T("AND GATE(FDC DRQ)"));
  65         pio0->set_device_name(_T("i8255 PIO(MSM5832 RTC)"));
  66         pio1->set_device_name(_T("i8255 PIO(CRTC)"));
  67         cpu->set_device_name(_T("CPU(i8086)"));
  68 #endif
  69
  70         crtc = new CRTC(this, emu);
  71         ioctrl = new IOCTRL(this, emu);
  72         kanji = new KANJI(this, emu);
  73 #if defined(_USE_QT)
  74         crtc->set_device_name(_T("CRTC"));
  75         ioctrl->set_device_name(_T("I/O CONTROL"));
  76         kanji->set_device_name(_T("KANJI I/F"));
  77 #endif
  78         // set contexts
  79         event->set_context_cpu(cpu);
  80         event->set_context_sound(beep);
  81         event->set_context_sound(pcm);
  82
  83         and_drq->set_context_out(cpu, SIG_CPU_NMI, 1);
  84         and_drq->set_mask(SIG_AND_BIT_0 | SIG_AND_BIT_1);
  85         sio->set_context_rxrdy(pic, SIG_I8259_IR1, 1);
  86         pio0->set_context_port_a(rtc, SIG_MSM58321_READ, 1, 0);
  87         pio0->set_context_port_a(rtc, SIG_MSM58321_WRITE, 2, 0);
  88         pio0->set_context_port_a(rtc, SIG_MSM58321_ADDR_WRITE, 4, 0);
  89         pio0->set_context_port_c(rtc, SIG_MSM58321_DATA, 0x0f, 0);
  90         pio1->set_context_port_a(crtc, SIG_CRTC_BITMASK_LOW, 0xff, 0);
  91         pio1->set_context_port_b(crtc, SIG_CRTC_BITMASK_HIGH, 0xff, 0);
  92         pio1->set_context_port_c(crtc, SIG_CRTC_VRAM_PLANE, 0x3f, 0);
  93         pio1->set_context_port_c(and_drq, SIG_AND_BIT_0, 0x80, 0);
  94         pio1->set_context_port_c(ioctrl, SIG_IOCTRL_RESET, 0x40, 0);
  95         pic->set_context_cpu(cpu);
  96         rtc->set_context_data(pio0, SIG_I8255_PORT_C, 0x0f, 0);
  97         rtc->set_context_busy(pio0, SIG_I8255_PORT_C, 0x10);
  98         fdc->set_context_irq(cpu, SIG_CPU_NMI, 1);
  99         fdc->set_context_drq(and_drq, SIG_AND_BIT_1, 1);
 100
 101         crtc->set_context_pic(pic);
 102         ioctrl->set_context_pic(pic);
 103         ioctrl->set_context_fdc(fdc);
 104         ioctrl->set_context_beep(beep);
 105         ioctrl->set_context_pcm(pcm);
 106
 107         // cpu bus
 108         cpu->set_context_mem(memory);
 109         cpu->set_context_io(io);
 110         cpu->set_context_intr(pic);
 111 #ifdef USE_DEBUGGER
 112         cpu->set_context_debugger(new DEBUGGER(this, emu));
 113 #endif
 114
 115         // memory bus
 116         memset(ram, 0, sizeof(ram));
 117         memset(ipl, 0xff, sizeof(ipl));
 118
 119         memory->read_bios(_T("IPL.ROM"), ipl, sizeof(ipl));
 120
 121         memory->set_memory_rw(0x00000, 0xbffff, ram);
 122         memory->set_memory_mapped_io_rw(0xc0000, 0xdffff, crtc);
 123         memory->set_memory_r(0xf8000, 0xfffff, ipl);
 124
 125         // i/o bus
 126         io->set_iomap_alias_rw(0x00, pic, 0);
 127         io->set_iomap_alias_rw(0x02, pic, 1);
 128 //      io->set_iomap_alias_rw(0x04, dma, 0);
 129 //      io->set_iomap_alias_rw(0x06, dma, 1);
 130         io->set_iomap_alias_r(0x08, fdc, 0);
 131         io->set_iomap_alias_rw(0x0a, fdc, 1);
 132         io->set_iomap_alias_rw(0x10, pio0, 0);
 133         io->set_iomap_alias_rw(0x12, pio0, 1);
 134         io->set_iomap_alias_rw(0x14, pio0, 2);
 135         io->set_iomap_alias_rw(0x16, pio0, 3);
 136         io->set_iomap_alias_rw(0x18, pio1, 0);
 137         io->set_iomap_alias_rw(0x1a, pio1, 1);
 138         io->set_iomap_alias_rw(0x1c, pio1, 2);
 139         io->set_iomap_alias_rw(0x1e, pio1, 3);
 140         io->set_iomap_single_r(0x20, ioctrl);
 141         io->set_iomap_single_rw(0x22, ioctrl);
 142         io->set_iomap_single_w(0x24, ioctrl);
 143         io->set_iomap_alias_rw(0x28, sio, 0);
 144         io->set_iomap_alias_rw(0x2a, sio, 1);
 145         io->set_iomap_single_rw(0x30, crtc);
 146         io->set_iomap_single_rw(0x38, crtc);
 147         io->set_iomap_single_rw(0x3a, crtc);
 148         io->set_iomap_single_rw(0x3c, crtc);
 149         io->set_iomap_single_rw(0x3e, crtc);
 150         for(int i = 0x40; i < 0x62; i++) {
 151                 io->set_iomap_single_rw(i, crtc);
 152         }
 153         io->set_iomap_single_rw(0x80, kanji);
 154         io->set_iomap_single_rw(0x81, kanji);
 155         io->set_iomap_single_w(0x84, kanji);
 156         io->set_iomap_single_w(0x86, kanji);
 157
 158         // initialize all devices
 159         for(DEVICE* device = first_device; device; device = device->next_device) {
 160                 device->initialize();
 161         }
 162         for(int i = 0; i < 4; i++) {
 163                 fdc->set_drive_type(i, DRIVE_TYPE_2D);
 164         }
 165 }
 166
 167 VM::~VM()
 168 {
 169         // delete all devices
 170         for(DEVICE* device = first_device; device;) {
 171                 DEVICE *next_device = device->next_device;
 172                 device->release();
 173                 delete device;
 174                 device = next_device;
 175         }
 176 }
 177
 178 DEVICE* VM::get_device(int id)
 179 {
 180         for(DEVICE* device = first_device; device; device = device->next_device) {
 181                 if(device->this_device_id == id) {
 182                         return device;
 183                 }
 184         }
 185         return NULL;
 186 }
 187
 188 // ----------------------------------------------------------------------------
 189 // drive virtual machine
 190 // ----------------------------------------------------------------------------
 191
 192 void VM::reset()
 193 {
 194         // reset all devices
 195         for(DEVICE* device = first_device; device; device = device->next_device) {
 196                 device->reset();
 197         }
 198 }
 199
 200 void VM::run()
 201 {
 202         event->drive();
 203 }
 204
 205 // ----------------------------------------------------------------------------
 206 // debugger
 207 // ----------------------------------------------------------------------------
 208
 209 #ifdef USE_DEBUGGER
 210 DEVICE *VM::get_cpu(int index)
 211 {
 212         if(index == 0) {
 213                 return cpu;
 214         }
 215         return NULL;
 216 }
 217 #endif
 218
 219 // ----------------------------------------------------------------------------
 220 // draw screen
 221 // ----------------------------------------------------------------------------
 222
 223 void VM::draw_screen()
 224 {
 225         crtc->draw_screen();
 226 }
 227
 228 uint32_t VM::get_access_lamp_status()
 229 {
 230         uint32_t status = fdc->read_signal(0);
 231         return (status & (1 | 4)) ? 1 : (status & (2 | 8)) ? 2 : 0;
 232 }
 233
 234 // ----------------------------------------------------------------------------
 235 // soud manager
 236 // ----------------------------------------------------------------------------
 237
 238 void VM::initialize_sound(int rate, int samples)
 239 {
 240         // init sound manager
 241         event->initialize_sound(rate, samples);
 242
 243         // init sound gen
 244         beep->initialize_sound(rate, 2400, 8000);
 245         pcm->initialize_sound(rate, 8000);
 246 }
 247
 248 uint16_t* VM::create_sound(int* extra_frames)
 249 {
 250         return event->create_sound(extra_frames);
 251 }
 252
 253 int VM::get_sound_buffer_ptr()
 254 {
 255         return event->get_sound_buffer_ptr();
 256 }
 257
 258 #ifdef USE_SOUND_VOLUME
 259 void VM::set_sound_device_volume(int ch, int decibel_l, int decibel_r)
 260 {
 261         if(ch == 0) {
 262                 beep->set_volume(0, decibel_l, decibel_r);
 263         } else if(ch == 1) {
 264                 pcm->set_volume(0, decibel_l, decibel_r);
 265         }
 266 }
 267 #endif
 268
 269 // ----------------------------------------------------------------------------
 270 // notify key
 271 // ----------------------------------------------------------------------------
 272
 273 void VM::key_down(int code, bool repeat)
 274 {
 275         ioctrl->key_down(code);
 276 }
 277
 278 void VM::key_up(int code)
 279 {
 280         ioctrl->key_up(code);
 281 }
 282
 283 // ----------------------------------------------------------------------------
 284 // user interface
 285 // ----------------------------------------------------------------------------
 286
 287 void VM::open_floppy_disk(int drv, const _TCHAR* file_path, int bank)
 288 {
 289         fdc->open_disk(drv, file_path, bank);
 290 }
 291
 292 void VM::close_floppy_disk(int drv)
 293 {
 294         fdc->close_disk(drv);
 295 }
 296
 297 bool VM::is_floppy_disk_inserted(int drv)
 298 {
 299         return fdc->is_disk_inserted(drv);
 300 }
 301
 302 void VM::is_floppy_disk_protected(int drv, bool value)
 303 {
 304         fdc->is_disk_protected(drv, value);
 305 }
 306
 307 bool VM::is_floppy_disk_protected(int drv)
 308 {
 309         return fdc->is_disk_protected(drv);
 310 }
 311
 312 bool VM::is_frame_skippable()
 313 {
 314         return event->is_frame_skippable();
 315 }
 316
 317 void VM::update_config()
 318 {
 319         for(DEVICE* device = first_device; device; device = device->next_device) {
 320                 device->update_config();
 321         }
 322 }
 323
 324 #define STATE_VERSION   1
 325
 326 void VM::save_state(FILEIO* state_fio)
 327 {
 328         state_fio->FputUint32(STATE_VERSION);
 329
 330         for(DEVICE* device = first_device; device; device = device->next_device) {
 331                 device->save_state(state_fio);
 332         }
 333         state_fio->Fwrite(ram, sizeof(ram), 1);
 334 }
 335
 336 bool VM::load_state(FILEIO* state_fio)
 337 {
 338         if(state_fio->FgetUint32() != STATE_VERSION) {
 339                 return false;
 340         }
 341         for(DEVICE* device = first_device; device; device = device->next_device) {
 342                 if(!device->load_state(state_fio)) {
 343                         return false;
 344                 }
 345         }
 346         state_fio->Fread(ram, sizeof(ram), 1);
 347         return true;
 348 }
 349