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