source/src/vm/jx/jx.cpp

   1 /*
   2         IBM Japan Ltd PC/JX Emulator 'eJX'
   3
   4         Author : Takeda.Toshiya
   5         Date   : 2011.05.09-
   6
   7         [ virtual machine ]
   8 */
   9
  10 #include "jx.h"
  11 #include "../../emu.h"
  12 #include "../device.h"
  13 #include "../event.h"
  14
  15 #include "../disk.h"
  16 #include "../hd46505.h"
  17 #include "../i8251.h"
  18 #include "../i8253.h"
  19 #include "../i8255.h"
  20 #include "../i8259.h"
  21 #include "../i86.h"
  22 #include "../io.h"
  23 #include "../memory.h"
  24 #include "../noise.h"
  25 #include "../pcm1bit.h"
  26 #include "../sn76489an.h"
  27 #include "../upd765a.h"
  28
  29 #ifdef USE_DEBUGGER
  30 #include "../debugger.h"
  31 #endif
  32
  33 #include "display.h"
  34 #include "floppy.h"
  35 #include "keyboard.h"
  36 #include "speaker.h"
  37
  38 // ----------------------------------------------------------------------------
  39 // initialize
  40 // ----------------------------------------------------------------------------
  41
  42 VM::VM(EMU* parent_emu) : emu(parent_emu)
  43 {
  44         // create devices
  45         first_device = last_device = NULL;
  46         dummy = new DEVICE(this, emu);  // must be 1st device
  47         event = new EVENT(this, emu);   // must be 2nd device
  48         dummy->set_device_name(_T("1st Dummy"));
  49
  50         crtc = new HD46505(this, emu);
  51         sio = new I8251(this, emu);
  52         pit = new I8253(this, emu);
  53         pio = new I8255(this, emu);
  54         pic = new I8259(this, emu);
  55         cpu = new I86(this, emu);       // 8088
  56         io = new IO(this, emu);
  57         mem = new MEMORY(this, emu);
  58         pcm = new PCM1BIT(this, emu);
  59         psg = new SN76489AN(this, emu); // SN76496N
  60         fdc = new UPD765A(this, emu);
  61         fdc->set_context_noise_seek(new NOISE(this, emu));
  62         fdc->set_context_noise_head_down(new NOISE(this, emu));
  63         fdc->set_context_noise_head_up(new NOISE(this, emu));
  64
  65         display = new DISPLAY(this, emu);
  66         floppy = new FLOPPY(this, emu);
  67         keyboard = new KEYBOARD(this, emu);
  68         speaker = new SPEAKER(this, emu);
  69         /* IRQ  0 Timer Clock Interrupt
  70                 1 I/O Channel (Reserved)
  71                 2 I/O Channel
  72                 3 Asynchronous Port Interrupt (RS-232C)
  73                 4 Modem Interrupt
  74                 5 Vertical Retrace Interrupt (Display)
  75                 6 Diskette Interrupt (WDT)
  76                 7 I/O Channel (Parallel Printer)
  77         */
  78
  79         // set contexts
  80         event->set_context_cpu(cpu);
  81         event->set_context_sound(pcm);
  82         event->set_context_sound(fdc->get_context_noise_seek());
  83         event->set_context_sound(fdc->get_context_noise_head_down());
  84         event->set_context_sound(fdc->get_context_noise_head_up());
  85
  86         // cpu bus
  87         cpu->set_context_mem(mem);
  88         cpu->set_context_io(io);
  89         cpu->set_context_intr(pic);
  90 #ifdef USE_DEBUGGER
  91         cpu->set_context_debugger(new DEBUGGER(this, emu));
  92 #endif
  93
  94         crtc->set_context_disp(display, SIG_DISPLAY_ENABLE, 1);
  95         crtc->set_context_vblank(display, SIG_DISPLAY_VBLANK, 1);
  96         crtc->set_context_vblank(pic, SIG_I8259_IR5, 1);
  97
  98         /* PIT  0 Interrupt
  99                 2 Speaker
 100         */
 101         pit->set_constant_clock(0, CPU_CLOCKS / 4);
 102 #ifdef TIMER_HACK
 103         pit->set_constant_clock(1, CPU_CLOCKS / 4);
 104 #endif
 105         pit->set_constant_clock(2, CPU_CLOCKS / 4);
 106         pit->set_context_ch0(pic, SIG_I8259_IR0, 1);                    // to IRQ0
 107 #ifndef TIMER_HACK
 108         pit->set_context_ch0(keyboard, SIG_KEYBOARD_TIMER, 1);          // to clock of timer1
 109 #endif
 110         pit->set_context_ch2(pio, SIG_I8255_PORT_C, 0x20);              // to PC5
 111         pit->set_context_ch2(pcm, SIG_PCM1BIT_SIGNAL, 0x20);            // to speaker
 112         pio->set_context_port_b(pit, SIG_I8253_GATE_2, 0x01, 0);        // PB0
 113         pio->set_context_port_b(speaker, SIG_SPEAKER_PIO, 0x62, 0);     // PB1+5+6
 114         pio->set_context_port_b(display, SIG_DISPLAY_PIO, 0x04, 0);     // PB2
 115         pic->set_context_cpu(cpu);
 116
 117         display->set_context_mem(mem);
 118         display->set_regs_ptr(crtc->get_regs());
 119         floppy->set_context_fdc(fdc);
 120         floppy->set_context_pic(pic);
 121         keyboard->set_context_cpu(cpu);
 122         keyboard->set_context_pio(pio);
 123         keyboard->set_context_pit(pit);
 124         speaker->set_context_pcm(pcm);
 125         speaker->set_context_psg(psg);
 126
 127         // memory bus
 128         //      00000-7FFFF     RAM
 129         //      80000-B7FFF     KANJI ROM ???
 130         //      A0000-A7FFF     EXT-VRAM
 131         //      B8000-BFFFF     VRAM
 132         //      D0000-FFFFF     CART+IPL
 133
 134         memset(font, 0xff, sizeof(font));
 135         memset(kanji, 0xff, sizeof(kanji));
 136         memset(ram, 0, sizeof(ram));
 137         memset(ipl, 0xff, sizeof(ipl));
 138
 139         mem->read_bios(_T("FONT.ROM"), font, sizeof(font));
 140         mem->read_bios(_T("KANJI.ROM"), kanji, sizeof(kanji));
 141         int length = mem->read_bios(_T("IPL.ROM"), ipl, sizeof(ipl));
 142         int offset = 0x30000 - length;
 143         memmove(ipl + offset, ipl, length);
 144         memset(ipl, 0xff, offset);
 145
 146         mem->set_memory_rw(0x00000, 0x7ffff, ram);
 147 //      mem->set_memory_r(0x80000, 0xb7fff, kanji);
 148         mem->set_memory_r(0xd0000, 0xfffff, ipl);
 149
 150         display->set_font_ptr(font);
 151         display->set_kanji_ptr(kanji);
 152
 153         // i/o bus
 154         for(int i = 0x20; i <= 0x27; i++) {
 155                 io->set_iomap_alias_rw(i, pic, i & 1);
 156         }
 157         io->set_iomap_range_rw(0x40, 0x43, pit);
 158         io->set_iomap_range_rw(0x60, 0x67, pio);
 159         io->set_iomap_range_rw(0xa0, 0xa7, keyboard);
 160         io->set_iomap_range_w(0xc0, 0xc7, psg);
 161
 162         io->set_iomap_single_w(0xf2, floppy);
 163         io->set_iomap_range_rw(0xf4, 0xf5, fdc);
 164
 165         io->set_iomap_single_rw(0x1ff, display);
 166
 167 ///     io->set_iovalue_range_r(0x200, 0x207, 0);
 168
 169         io->set_iomap_range_rw(0x3d0, 0x3d1, crtc);
 170         io->set_iomap_range_rw(0x3d4, 0x3d5, crtc);
 171         io->set_iomap_range_rw(0x3d8, 0x3df, display);
 172
 173         // initialize all devices
 174         for(DEVICE* device = first_device; device; device = device->next_device) {
 175                 device->initialize();
 176         }
 177         for(int i = 0; i < 4; i++) {
 178                 fdc->set_drive_type(i, DRIVE_TYPE_2DD);
 179         }
 180 }
 181
 182 VM::~VM()
 183 {
 184         // delete all devices
 185         for(DEVICE* device = first_device; device;) {
 186                 DEVICE *next_device = device->next_device;
 187                 device->release();
 188                 delete device;
 189                 device = next_device;
 190         }
 191 }
 192
 193 DEVICE* VM::get_device(int id)
 194 {
 195         for(DEVICE* device = first_device; device; device = device->next_device) {
 196                 if(device->this_device_id == id) {
 197                         return device;
 198                 }
 199         }
 200         return NULL;
 201 }
 202
 203 // ----------------------------------------------------------------------------
 204 // drive virtual machine
 205 // ----------------------------------------------------------------------------
 206
 207 void VM::reset()
 208 {
 209         // reset all devices
 210         for(DEVICE* device = first_device; device; device = device->next_device) {
 211                 device->reset();
 212         }
 213
 214         // initial device settings
 215         pio->write_signal(SIG_I8255_PORT_C, 0x02, 0x02);        // PC1=1: Modem card is not installed
 216         pio->write_signal(SIG_I8255_PORT_C, 0x00, 0x04);        // PC2=0: Diskette card is installed
 217 //      pio->write_signal(SIG_I8255_PORT_C, 0x04, 0x04);        // PC2=0: Diskette card is no installed
 218         pio->write_signal(SIG_I8255_PORT_C, 0x00, 0x08);        // PC3=0: 64KB Memory and Display Expansion is installed
 219         pio->write_signal(SIG_I8255_PORT_C, 0x00, 0x80);        // PC7=0: Keyboard cable is connected
 220 }
 221
 222 void VM::run()
 223 {
 224         event->drive();
 225 }
 226
 227 // ----------------------------------------------------------------------------
 228 // debugger
 229 // ----------------------------------------------------------------------------
 230
 231 #ifdef USE_DEBUGGER
 232 DEVICE *VM::get_cpu(int index)
 233 {
 234         if(index == 0) {
 235                 return cpu;
 236         }
 237         return NULL;
 238 }
 239 #endif
 240
 241 // ----------------------------------------------------------------------------
 242 // draw screen
 243 // ----------------------------------------------------------------------------
 244
 245 void VM::draw_screen()
 246 {
 247         display->draw_screen();
 248 }
 249
 250 // ----------------------------------------------------------------------------
 251 // soud manager
 252 // ----------------------------------------------------------------------------
 253
 254 void VM::initialize_sound(int rate, int samples)
 255 {
 256         // init sound manager
 257         event->initialize_sound(rate, samples);
 258
 259         // init sound gen
 260         pcm->initialize_sound(rate, 8000);
 261         psg->initialize_sound(rate, 3579545, 8000);
 262 }
 263
 264 uint16_t* VM::create_sound(int* extra_frames)
 265 {
 266         return event->create_sound(extra_frames);
 267 }
 268
 269 int VM::get_sound_buffer_ptr()
 270 {
 271         return event->get_sound_buffer_ptr();
 272 }
 273
 274 #ifdef USE_SOUND_VOLUME
 275 void VM::set_sound_device_volume(int ch, int decibel_l, int decibel_r)
 276 {
 277         if(ch == 0) {
 278                 pcm->set_volume(0, decibel_l, decibel_r);
 279         } else if(ch == 1) {
 280                 fdc->get_context_noise_seek()->set_volume(0, decibel_l, decibel_r);
 281                 fdc->get_context_noise_head_down()->set_volume(0, decibel_l, decibel_r);
 282                 fdc->get_context_noise_head_up()->set_volume(0, decibel_l, decibel_r);
 283         }
 284 }
 285 #endif
 286
 287 // ----------------------------------------------------------------------------
 288 // notify key
 289 // ----------------------------------------------------------------------------
 290
 291 void VM::key_down(int code, bool repeat)
 292 {
 293         keyboard->key_down(code);
 294 }
 295
 296 void VM::key_up(int code)
 297 {
 298         keyboard->key_up(code);
 299 }
 300
 301 // ----------------------------------------------------------------------------
 302 // user interface
 303 // ----------------------------------------------------------------------------
 304
 305 void VM::open_floppy_disk(int drv, const _TCHAR* file_path, int bank)
 306 {
 307         fdc->open_disk(drv, file_path, bank);
 308 }
 309
 310 void VM::close_floppy_disk(int drv)
 311 {
 312         fdc->close_disk(drv);
 313 }
 314
 315 bool VM::is_floppy_disk_inserted(int drv)
 316 {
 317         return fdc->is_disk_inserted(drv);
 318 }
 319
 320 void VM::is_floppy_disk_protected(int drv, bool value)
 321 {
 322         fdc->is_disk_protected(drv, value);
 323 }
 324
 325 bool VM::is_floppy_disk_protected(int drv)
 326 {
 327         return fdc->is_disk_protected(drv);
 328 }
 329
 330 uint32_t VM::is_floppy_disk_accessed()
 331 {
 332         return fdc->read_signal(0);
 333 }
 334
 335 bool VM::is_frame_skippable()
 336 {
 337         return event->is_frame_skippable();
 338 }
 339
 340 void VM::update_config()
 341 {
 342         for(DEVICE* device = first_device; device; device = device->next_device) {
 343                 device->update_config();
 344         }
 345 }
 346