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