source/src/vm/m5/m5.cpp

   1 /*
   2         SORD m5 Emulator 'Emu5'
   3
   4         Author : Takeda.Toshiya
   5         Date   : 2006.08.18 -
   6
   7         [ virtual machine ]
   8 */
   9
  10 #include "m5.h"
  11 #include "../../emu.h"
  12 #include "../device.h"
  13 #include "../event.h"
  14
  15 #include "../datarec.h"
  16 #include "../io.h"
  17 #include "../memory.h"
  18 #include "../noise.h"
  19 #include "../sn76489an.h"
  20 #include "../tms9918a.h"
  21 #include "../z80.h"
  22 #include "../z80ctc.h"
  23
  24 #ifdef USE_DEBUGGER
  25 #include "../debugger.h"
  26 #endif
  27
  28 #include "cmt.h"
  29 #include "keyboard.h"
  30
  31 // ----------------------------------------------------------------------------
  32 // initialize
  33 // ----------------------------------------------------------------------------
  34
  35 VM::VM(EMU* parent_emu) : emu(parent_emu)
  36 {
  37         // create devices
  38         first_device = last_device = NULL;
  39         dummy = new DEVICE(this, emu);  // must be 1st device
  40         event = new EVENT(this, emu);   // must be 2nd device
  41         dummy->set_device_name(_T("1st Dummy"));
  42
  43         drec = new DATAREC(this, emu);
  44         drec->set_context_noise_play(new NOISE(this, emu));
  45         drec->set_context_noise_stop(new NOISE(this, emu));
  46         drec->set_context_noise_fast(new NOISE(this, emu));
  47         io = new IO(this, emu);
  48         memory = new MEMORY(this, emu);
  49         psg = new SN76489AN(this, emu);
  50         vdp = new TMS9918A(this, emu);
  51         cpu = new Z80(this, emu);
  52         ctc = new Z80CTC(this, emu);
  53
  54         cmt = new CMT(this, emu);
  55         key = new KEYBOARD(this, emu);
  56         // set contexts
  57         event->set_context_cpu(cpu);
  58         event->set_context_sound(psg);
  59         event->set_context_sound(drec);
  60         event->set_context_sound(drec->get_context_noise_play());
  61         event->set_context_sound(drec->get_context_noise_stop());
  62         event->set_context_sound(drec->get_context_noise_fast());
  63
  64         drec->set_context_ear(cmt, SIG_CMT_IN, 1);
  65         drec->set_context_end(cmt, SIG_CMT_EOT, 1);
  66         vdp->set_context_irq(ctc, SIG_Z80CTC_TRIG_3, 1);
  67         cmt->set_context_drec(drec);
  68
  69         // cpu bus
  70         cpu->set_context_mem(memory);
  71         cpu->set_context_io(io);
  72         cpu->set_context_intr(ctc);
  73 #ifdef USE_DEBUGGER
  74         cpu->set_context_debugger(new DEBUGGER(this, emu));
  75 #endif
  76
  77         // z80 family daisy chain
  78         ctc->set_context_intr(cpu, 0);
  79
  80         // memory bus
  81         memset(ram, 0, sizeof(ram));
  82         memset(ext, 0, sizeof(ext));
  83         memset(ipl, 0xff, sizeof(ipl));
  84         memset(cart, 0xff, sizeof(cart));
  85
  86         memory->read_bios(_T("IPL.ROM"), ipl, sizeof(ipl));
  87
  88         memory->set_memory_r(0x0000, 0x1fff, ipl);
  89         memory->set_memory_r(0x2000, 0x6fff, cart);
  90         memory->set_memory_rw(0x7000, 0x7fff, ram);
  91         memory->set_memory_rw(0x8000, 0xffff, ext);
  92
  93         // i/o bus
  94         io->set_iomap_range_rw(0x00, 0x03, ctc);
  95         io->set_iomap_range_rw(0x10, 0x11, vdp);
  96         io->set_iomap_single_w(0x20, psg);
  97         io->set_iomap_range_r(0x30, 0x37, key);
  98         io->set_iomap_single_w(0x40, cmt);
  99         io->set_iomap_single_rw(0x50, cmt);
 100
 101         // FD5 floppy drive uint
 102         subcpu = NULL;
 103 #ifdef USE_DEBUGGER
 104 //      subcpu->set_context_debugger(new DEBUGGER(this, emu));
 105 #endif
 106
 107         // initialize all devices
 108         for(DEVICE* device = first_device; device; device = device->next_device) {
 109                 device->initialize();
 110         }
 111         inserted = false;
 112 }
 113
 114 VM::~VM()
 115 {
 116         // delete all devices
 117         for(DEVICE* device = first_device; device;) {
 118                 DEVICE *next_device = device->next_device;
 119                 device->release();
 120                 delete device;
 121                 device = next_device;
 122         }
 123 }
 124
 125 DEVICE* VM::get_device(int id)
 126 {
 127         for(DEVICE* device = first_device; device; device = device->next_device) {
 128                 if(device->this_device_id == id) {
 129                         return device;
 130                 }
 131         }
 132         return NULL;
 133 }
 134
 135 // ----------------------------------------------------------------------------
 136 // drive virtual machine
 137 // ----------------------------------------------------------------------------
 138
 139 void VM::reset()
 140 {
 141         // reset all devices
 142         for(DEVICE* device = first_device; device; device = device->next_device) {
 143                 device->reset();
 144         }
 145 }
 146
 147 void VM::run()
 148 {
 149         event->drive();
 150 }
 151
 152 // ----------------------------------------------------------------------------
 153 // debugger
 154 // ----------------------------------------------------------------------------
 155
 156 #ifdef USE_DEBUGGER
 157 DEVICE *VM::get_cpu(int index)
 158 {
 159         if(index == 0) {
 160                 return cpu;
 161         } else if(index == 1) {
 162                 return subcpu;
 163         }
 164         return NULL;
 165 }
 166 #endif
 167
 168 // ----------------------------------------------------------------------------
 169 // draw screen
 170 // ----------------------------------------------------------------------------
 171
 172 void VM::draw_screen()
 173 {
 174         vdp->draw_screen();
 175 }
 176
 177 // ----------------------------------------------------------------------------
 178 // soud manager
 179 // ----------------------------------------------------------------------------
 180
 181 void VM::initialize_sound(int rate, int samples)
 182 {
 183         // init sound manager
 184         event->initialize_sound(rate, samples);
 185
 186         // init sound gen
 187         psg->initialize_sound(rate, 3579545, 8000);
 188 }
 189
 190 uint16_t* VM::create_sound(int* extra_frames)
 191 {
 192         return event->create_sound(extra_frames);
 193 }
 194
 195 int VM::get_sound_buffer_ptr()
 196 {
 197         return event->get_sound_buffer_ptr();
 198 }
 199
 200 #ifdef USE_SOUND_VOLUME
 201 void VM::set_sound_device_volume(int ch, int decibel_l, int decibel_r)
 202 {
 203         if(ch == 0) {
 204                 psg->set_volume(0, decibel_l, decibel_r);
 205         } else if(ch == 1) {
 206                 drec->set_volume(0, decibel_l, decibel_r);
 207         } else if(ch == 2) {
 208                 drec->get_context_noise_play()->set_volume(0, decibel_l, decibel_r);
 209                 drec->get_context_noise_stop()->set_volume(0, decibel_l, decibel_r);
 210                 drec->get_context_noise_fast()->set_volume(0, decibel_l, decibel_r);
 211         }
 212 }
 213 #endif
 214
 215 // ----------------------------------------------------------------------------
 216 // user interface
 217 // ----------------------------------------------------------------------------
 218
 219 void VM::open_cart(int drv, const _TCHAR* file_path)
 220 {
 221         if(drv == 0) {
 222                 memset(cart, 0xff, sizeof(cart));
 223                 inserted = memory->read_image(file_path, cart, sizeof(cart));
 224                 reset();
 225         }
 226 }
 227
 228 void VM::close_cart(int drv)
 229 {
 230         if(drv == 0) {
 231                 memset(cart, 0xff, sizeof(cart));
 232                 inserted = false;
 233                 reset();
 234         }
 235 }
 236
 237 bool VM::is_cart_inserted(int drv)
 238 {
 239         if(drv == 0) {
 240                 return inserted;
 241         } else {
 242                 return false;
 243         }
 244 }
 245
 246 void VM::play_tape(int drv, const _TCHAR* file_path)
 247 {
 248         drec->play_tape(file_path);
 249 }
 250
 251 void VM::rec_tape(int drv, const _TCHAR* file_path)
 252 {
 253         drec->rec_tape(file_path);
 254 }
 255
 256 void VM::close_tape(int drv)
 257 {
 258         emu->lock_vm();
 259         drec->close_tape();
 260         emu->unlock_vm();
 261 }
 262
 263 bool VM::is_tape_inserted(int drv)
 264 {
 265         return drec->is_tape_inserted();
 266 }
 267
 268 bool VM::is_tape_playing(int drv)
 269 {
 270         return drec->is_tape_playing();
 271 }
 272
 273 bool VM::is_tape_recording(int drv)
 274 {
 275         return drec->is_tape_recording();
 276 }
 277
 278 int VM::get_tape_position(int drv)
 279 {
 280         return drec->get_tape_position();
 281 }
 282
 283 const _TCHAR* VM::get_tape_message(int drv)
 284 {
 285         return drec->get_message();
 286 }
 287
 288 bool VM::is_frame_skippable()
 289 {
 290         return event->is_frame_skippable();
 291 }
 292
 293 void VM::update_config()
 294 {
 295         for(DEVICE* device = first_device; device; device = device->next_device) {
 296                 device->update_config();
 297         }
 298 }
 299
 300 #define STATE_VERSION   3
 301
 302 void VM::save_state(FILEIO* state_fio)
 303 {
 304         state_fio->FputUint32(STATE_VERSION);
 305
 306         for(DEVICE* device = first_device; device; device = device->next_device) {
 307                 const char *name = typeid(*device).name() + 6; // skip "class "
 308
 309                 state_fio->FputInt32(strlen(name));
 310                 state_fio->Fwrite(name, strlen(name), 1);
 311                 device->save_state(state_fio);
 312         }
 313         state_fio->Fwrite(ram, sizeof(ram), 1);
 314         state_fio->Fwrite(ext, sizeof(ext), 1);
 315         state_fio->FputBool(inserted);
 316 }
 317
 318 bool VM::load_state(FILEIO* state_fio)
 319 {
 320         if(state_fio->FgetUint32() != STATE_VERSION) {
 321                 return false;
 322         }
 323         for(DEVICE* device = first_device; device; device = device->next_device) {
 324                 const char *name = typeid(*device).name() + 6; // skip "class "
 325
 326                 if(!(state_fio->FgetInt32() == strlen(name) && state_fio->Fcompare(name, strlen(name)))) {
 327                         return false;
 328                 }
 329                 if(!device->load_state(state_fio)) {
 330                         return false;
 331                 }
 332         }
 333         state_fio->Fread(ram, sizeof(ram), 1);
 334         state_fio->Fread(ext, sizeof(ext), 1);
 335         inserted = state_fio->FgetBool();
 336         return true;
 337 }
 338