source/src/vm/yalky/yalky.cpp

   1 /*
   2         Yuasa Kyouiku System YALKY Emulator 'eYALKY'
   3
   4         Author : Takeda.Toshiya
   5         Date   : 2016.03.28-
   6
   7         [ virtual machine ]
   8 */
   9
  10 #include "yalky.h"
  11 #include "../../emu.h"
  12 #include "../device.h"
  13 #include "../event.h"
  14
  15 #include "../datarec.h"
  16 #include "../i8080.h"
  17 #include "../i8155.h"
  18 #include "../memory.h"
  19 #include "../noise.h"
  20
  21 #ifdef USE_DEBUGGER
  22 #include "../debugger.h"
  23 #endif
  24
  25 #include "io.h"
  26
  27 // ----------------------------------------------------------------------------
  28 // initialize
  29 // ----------------------------------------------------------------------------
  30
  31 VM::VM(EMU* parent_emu) : emu(parent_emu)
  32 {
  33         config.sound_play_tape = false;
  34         config.wave_shaper[0] = false;
  35
  36         // create devices
  37         first_device = last_device = NULL;
  38         dummy = new DEVICE(this, emu);  // must be 1st device
  39         event = new EVENT(this, emu);   // must be 2nd device
  40         dummy->set_device_name(_T("1st Dummy"));
  41
  42         drec = new DATAREC(this, emu);
  43         drec->set_context_noise_play(new NOISE(this, emu));
  44         drec->set_context_noise_stop(new NOISE(this, emu));
  45         drec->set_context_noise_fast(new NOISE(this, emu));
  46         cpu = new I8080(this, emu);     // 8085
  47         pio = new I8155(this, emu);     // 8156
  48         memory = new MEMORY(this, emu);
  49
  50         io = new IO(this, emu);
  51
  52         // set contexts
  53         event->set_context_cpu(cpu);
  54         event->set_context_sound(drec);
  55         event->set_context_sound(drec->get_context_noise_play());
  56         event->set_context_sound(drec->get_context_noise_stop());
  57         event->set_context_sound(drec->get_context_noise_fast());
  58
  59         drec->set_context_ear(io, SIG_IO_DREC_EAR, 1);
  60         cpu->set_context_sod(drec, SIG_DATAREC_MIC, 1);
  61         pio->set_context_port_b(io, SIG_IO_PORT_B, 0xff, 0);
  62         pio->set_context_port_c(io, SIG_IO_PORT_C, 0xff, 0);
  63         pio->set_context_timer(cpu, SIG_I8085_RST7, 1);
  64         pio->set_constant_clock(CPU_CLOCKS);    // from 8085 CLOCK OUT
  65
  66         io->set_context_drec(drec);
  67         io->set_context_cpu(cpu);
  68         io->set_context_pio(pio);
  69         io->set_vram_ptr(vram);
  70
  71         // cpu bus
  72         cpu->set_context_mem(memory);
  73         cpu->set_context_io(io);
  74         cpu->set_context_intr(io);
  75 #ifdef USE_DEBUGGER
  76         cpu->set_context_debugger(new DEBUGGER(this, emu));
  77 #endif
  78
  79         // memory bus
  80         memset(rom, 0xff, sizeof(rom));
  81
  82         memory->read_bios(_T("BIOS.ROM"), rom, sizeof(rom));
  83
  84         memory->set_memory_r(0x0000, 0x1fff, rom);
  85         memory->set_memory_rw(0x4000, 0x43ff, vram);
  86         memory->set_memory_rw(0x6000, 0x60ff, ram);     // 8156
  87
  88         // initialize all devices
  89         for(DEVICE* device = first_device; device; device = device->next_device) {
  90                 device->initialize();
  91         }
  92 }
  93
  94 VM::~VM()
  95 {
  96         // delete all devices
  97         for(DEVICE* device = first_device; device;) {
  98                 DEVICE *next_device = device->next_device;
  99                 device->release();
 100                 delete device;
 101                 device = next_device;
 102         }
 103 }
 104
 105 DEVICE* VM::get_device(int id)
 106 {
 107         for(DEVICE* device = first_device; device; device = device->next_device) {
 108                 if(device->this_device_id == id) {
 109                         return device;
 110                 }
 111         }
 112         return NULL;
 113 }
 114
 115 // ----------------------------------------------------------------------------
 116 // drive virtual machine
 117 // ----------------------------------------------------------------------------
 118
 119 void VM::reset()
 120 {
 121         // reset all devices
 122         for(DEVICE* device = first_device; device; device = device->next_device) {
 123                 device->reset();
 124         }
 125         pio->write_signal(SIG_I8155_PORT_A, 0xff, 0x80); // PA7=1
 126         memset(ram, 0, sizeof(ram));
 127         memset(vram, 0, sizeof(vram));
 128 }
 129
 130 void VM::special_reset()
 131 {
 132         cpu->reset();
 133 }
 134
 135 void VM::run()
 136 {
 137         event->drive();
 138 }
 139
 140 // ----------------------------------------------------------------------------
 141 // debugger
 142 // ----------------------------------------------------------------------------
 143
 144 #ifdef USE_DEBUGGER
 145 DEVICE *VM::get_cpu(int index)
 146 {
 147         if(index == 0) {
 148                 return cpu;
 149         }
 150         return NULL;
 151 }
 152 #endif
 153
 154 // ----------------------------------------------------------------------------
 155 // draw screen
 156 // ----------------------------------------------------------------------------
 157
 158 void VM::draw_screen()
 159 {
 160         io->draw_screen();
 161 }
 162
 163 // ----------------------------------------------------------------------------
 164 // soud manager
 165 // ----------------------------------------------------------------------------
 166
 167 void VM::initialize_sound(int rate, int samples)
 168 {
 169         // init sound manager
 170         event->initialize_sound(rate, samples);
 171 }
 172
 173 uint16_t* VM::create_sound(int* extra_frames)
 174 {
 175         return event->create_sound(extra_frames);
 176 }
 177
 178 int VM::get_sound_buffer_ptr()
 179 {
 180         return event->get_sound_buffer_ptr();
 181 }
 182
 183 #ifdef USE_SOUND_VOLUME
 184 void VM::set_sound_device_volume(int ch, int decibel_l, int decibel_r)
 185 {
 186         if(ch == 0) {
 187                 drec->set_volume(0, decibel_l, decibel_r);
 188         } else if(ch == 1) {
 189                 drec->get_context_noise_play()->set_volume(0, decibel_l, decibel_r);
 190                 drec->get_context_noise_stop()->set_volume(0, decibel_l, decibel_r);
 191                 drec->get_context_noise_fast()->set_volume(0, decibel_l, decibel_r);
 192         }
 193 }
 194 #endif
 195
 196 // ----------------------------------------------------------------------------
 197 // user interface
 198 // ----------------------------------------------------------------------------
 199
 200 void VM::play_tape(int drv, const _TCHAR* file_path)
 201 {
 202         if(drec->play_tape(file_path)) {
 203                 drec->set_remote(true);
 204                 io->open_tape();
 205         }
 206 }
 207
 208 void VM::rec_tape(int drv, const _TCHAR* file_path)
 209 {
 210         if(drec->rec_tape(file_path)) {
 211                 drec->set_remote(true);
 212                 io->open_tape();
 213         }
 214 }
 215
 216 void VM::close_tape(int drv)
 217 {
 218         emu->lock_vm();
 219         drec->close_tape();
 220         emu->unlock_vm();
 221         drec->set_remote(false);
 222 }
 223
 224 bool VM::is_tape_inserted(int drv)
 225 {
 226         return drec->is_tape_inserted();
 227 }
 228
 229 bool VM::is_tape_playing(int drv)
 230 {
 231         return drec->is_tape_playing();
 232 }
 233
 234 bool VM::is_tape_recording(int drv)
 235 {
 236         return drec->is_tape_recording();
 237 }
 238
 239 int VM::get_tape_position(int drv)
 240 {
 241         return drec->get_tape_position();
 242 }
 243
 244 const _TCHAR* VM::get_tape_message(int drv)
 245 {
 246         return drec->get_message();
 247 }
 248
 249 void VM::push_play(int drv)
 250 {
 251         drec->set_ff_rew(0);
 252         drec->set_remote(true);
 253 }
 254
 255 void VM::push_stop(int drv)
 256 {
 257         drec->set_remote(false);
 258 }
 259
 260 void VM::push_fast_forward(int drv)
 261 {
 262         drec->set_ff_rew(1);
 263         drec->set_remote(true);
 264 }
 265
 266 void VM::push_fast_rewind(int drv)
 267 {
 268         drec->set_ff_rew(-1);
 269         drec->set_remote(true);
 270 }
 271
 272 bool VM::is_frame_skippable()
 273 {
 274         return event->is_frame_skippable();
 275 }
 276
 277 void VM::update_config()
 278 {
 279         for(DEVICE* device = first_device; device; device = device->next_device) {
 280                 device->update_config();
 281         }
 282 }
 283
 284 #define STATE_VERSION   4
 285
 286 void VM::save_state(FILEIO* state_fio)
 287 {
 288         state_fio->FputUint32(STATE_VERSION);
 289
 290         for(DEVICE* device = first_device; device; device = device->next_device) {
 291                 device->save_state(state_fio);
 292         }
 293         state_fio->Fwrite(ram, sizeof(ram), 1);
 294         state_fio->Fwrite(vram, sizeof(vram), 1);
 295 }
 296
 297 bool VM::load_state(FILEIO* state_fio)
 298 {
 299         if(state_fio->FgetUint32() != STATE_VERSION) {
 300                 return false;
 301         }
 302         for(DEVICE* device = first_device; device; device = device->next_device) {
 303                 if(!device->load_state(state_fio)) {
 304                         return false;
 305                 }
 306         }
 307         state_fio->Fread(ram, sizeof(ram), 1);
 308         state_fio->Fread(vram, sizeof(vram), 1);
 309         return true;
 310 }
 311