source/src/vm/hc40/hc40.cpp

   1 /*
   2         EPSON HC-40 Emulator 'eHC-40'
   3
   4         Author : Takeda.Toshiya
   5         Date   : 2008.02.23 -
   6
   7         [ virtual machine ]
   8 */
   9
  10 #include "hc40.h"
  11 #include "../../emu.h"
  12 #include "../device.h"
  13 #include "../event.h"
  14
  15 #include "../beep.h"
  16 #include "../datarec.h"
  17 #include "../ptf20.h"
  18 #include "../z80.h"
  19
  20 #ifdef USE_DEBUGGER
  21 #include "../debugger.h"
  22 #endif
  23
  24 #include "io.h"
  25 #include "memory.h"
  26
  27 // ----------------------------------------------------------------------------
  28 // initialize
  29 // ----------------------------------------------------------------------------
  30
  31 VM::VM(EMU* parent_emu) : emu(parent_emu)
  32 {
  33         // create devices
  34         first_device = last_device = NULL;
  35         dummy = new DEVICE(this, emu);  // must be 1st device
  36         event = new EVENT(this, emu);   // must be 2nd device
  37
  38         beep = new BEEP(this, emu);
  39         drec = new DATAREC(this, emu);
  40         tf20 = new PTF20(this, emu);
  41         cpu = new Z80(this, emu);
  42
  43         io = new IO(this, emu);
  44         memory = new MEMORY(this, emu);
  45
  46         // set contexts
  47         event->set_context_cpu(cpu);
  48         event->set_context_sound(beep);
  49         event->set_context_sound(drec);
  50
  51         drec->set_context_ear(io, SIG_IO_DREC, 1);
  52         tf20->set_context_sio(io, SIG_IO_ART);
  53
  54         io->set_context_cpu(cpu);
  55         io->set_context_mem(memory, memory->get_ram());
  56         io->set_context_tf20(tf20);
  57         io->set_context_beep(beep);
  58         io->set_context_drec(drec);
  59
  60         // cpu bus
  61         cpu->set_context_mem(memory);
  62         cpu->set_context_io(io);
  63         cpu->set_context_intr(io);
  64 #ifdef USE_DEBUGGER
  65         cpu->set_context_debugger(new DEBUGGER(this, emu));
  66 #endif
  67
  68         // initialize all devices
  69         for(DEVICE* device = first_device; device; device = device->next_device) {
  70                 device->initialize();
  71         }
  72 }
  73
  74 VM::~VM()
  75 {
  76         // delete all devices
  77         for(DEVICE* device = first_device; device;) {
  78                 DEVICE *next_device = device->next_device;
  79                 device->release();
  80                 delete device;
  81                 device = next_device;
  82         }
  83 }
  84
  85 DEVICE* VM::get_device(int id)
  86 {
  87         for(DEVICE* device = first_device; device; device = device->next_device) {
  88                 if(device->this_device_id == id) {
  89                         return device;
  90                 }
  91         }
  92         return NULL;
  93 }
  94
  95 // ----------------------------------------------------------------------------
  96 // drive virtual machine
  97 // ----------------------------------------------------------------------------
  98
  99 void VM::reset()
 100 {
 101         // reset all devices
 102         for(DEVICE* device = first_device; device; device = device->next_device) {
 103                 device->reset();
 104         }
 105 }
 106
 107 void VM::special_reset()
 108 {
 109         // system reset
 110         for(DEVICE* device = first_device; device; device = device->next_device) {
 111                 device->reset();
 112         }
 113         io->sysreset();
 114 }
 115
 116 void VM::run()
 117 {
 118         event->drive();
 119 }
 120
 121 // ----------------------------------------------------------------------------
 122 // debugger
 123 // ----------------------------------------------------------------------------
 124
 125 #ifdef USE_DEBUGGER
 126 DEVICE *VM::get_cpu(int index)
 127 {
 128         if(index == 0) {
 129                 return cpu;
 130         }
 131         return NULL;
 132 }
 133 #endif
 134
 135 // ----------------------------------------------------------------------------
 136 // draw screen
 137 // ----------------------------------------------------------------------------
 138
 139 void VM::draw_screen()
 140 {
 141         io->draw_screen();
 142 }
 143
 144 int VM::access_lamp()
 145 {
 146         uint32 status = tf20->read_signal(0);
 147         return (status & (1 | 4)) ? 1 : (status & (2 | 8)) ? 2 : 0;
 148 }
 149
 150 // ----------------------------------------------------------------------------
 151 // soud manager
 152 // ----------------------------------------------------------------------------
 153
 154 void VM::initialize_sound(int rate, int samples)
 155 {
 156         // init sound manager
 157         event->initialize_sound(rate, samples);
 158
 159         // init sound gen
 160         beep->init(rate, 1000, 8000);
 161 }
 162
 163 uint16* VM::create_sound(int* extra_frames)
 164 {
 165         return event->create_sound(extra_frames);
 166 }
 167
 168 int VM::sound_buffer_ptr()
 169 {
 170         return event->sound_buffer_ptr();
 171 }
 172
 173 #ifdef USE_SOUND_VOLUME
 174 void VM::set_sound_device_volume(int ch, int decibel_l, int decibel_r)
 175 {
 176         if(ch == 0) {
 177                 beep->set_volume(0, decibel_l, decibel_r);
 178         } else if(ch == 1) {
 179                 drec->set_volume(0, decibel_l, decibel_r);
 180         }
 181 }
 182 #endif
 183
 184 // ----------------------------------------------------------------------------
 185 // notify key
 186 // ----------------------------------------------------------------------------
 187
 188 void VM::key_down(int code, bool repeat)
 189 {
 190         io->key_down(code);
 191 }
 192
 193 void VM::key_up(int code)
 194 {
 195         io->key_up(code);
 196 }
 197
 198 // ----------------------------------------------------------------------------
 199 // user interface
 200 // ----------------------------------------------------------------------------
 201
 202 void VM::open_disk(int drv, const _TCHAR* file_path, int bank)
 203 {
 204         tf20->open_disk(drv, file_path, bank);
 205 }
 206
 207 void VM::close_disk(int drv)
 208 {
 209         tf20->close_disk(drv);
 210 }
 211
 212 bool VM::disk_inserted(int drv)
 213 {
 214         return tf20->disk_inserted(drv);
 215 }
 216
 217 void VM::set_disk_protected(int drv, bool value)
 218 {
 219         tf20->set_disk_protected(drv, value);
 220 }
 221
 222 bool VM::get_disk_protected(int drv)
 223 {
 224         return tf20->get_disk_protected(drv);
 225 }
 226
 227 void VM::play_tape(const _TCHAR* file_path)
 228 {
 229         drec->play_tape(file_path);
 230 }
 231
 232 void VM::rec_tape(const _TCHAR* file_path)
 233 {
 234         drec->rec_tape(file_path);
 235 }
 236
 237 void VM::close_tape()
 238 {
 239         drec->close_tape();
 240 }
 241
 242 bool VM::tape_inserted()
 243 {
 244         return drec->tape_inserted();
 245 }
 246
 247 bool VM::tape_playing()
 248 {
 249         return drec->tape_playing();
 250 }
 251
 252 bool VM::tape_recording()
 253 {
 254         return drec->tape_recording();
 255 }
 256
 257 int VM::tape_position()
 258 {
 259         return drec->tape_position();
 260 }
 261
 262 bool VM::now_skip()
 263 {
 264         return event->now_skip();
 265 }
 266
 267 void VM::update_config()
 268 {
 269         for(DEVICE* device = first_device; device; device = device->next_device) {
 270                 device->update_config();
 271         }
 272 }
 273
 274 #define STATE_VERSION   1
 275
 276 void VM::save_state(FILEIO* state_fio)
 277 {
 278         state_fio->FputUint32(STATE_VERSION);
 279
 280         for(DEVICE* device = first_device; device; device = device->next_device) {
 281                 device->save_state(state_fio);
 282         }
 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         return true;
 296 }
 297