source/src/vm/bmjr/bmjr.cpp

   1 /*
   2         HITACH BASIC Master Jr Emulator 'eBASICMasterJr'
   3
   4         Author : Takeda.Toshiya
   5         Date   : 2015.08.28-
   6
   7         [ virtual machine ]
   8 */
   9
  10 #include "bmjr.h"
  11 #include "../../emu.h"
  12 #include "../device.h"
  13 #include "../event.h"
  14
  15 #include "../datarec.h"
  16 #include "../mc6800.h"
  17 #include "../mc6820.h"
  18
  19 #ifdef USE_DEBUGGER
  20 #include "../debugger.h"
  21 #endif
  22
  23 #include "memory.h"
  24
  25 // ----------------------------------------------------------------------------
  26 // initialize
  27 // ----------------------------------------------------------------------------
  28
  29 VM::VM(EMU* parent_emu) : emu(parent_emu)
  30 {
  31         // create devices
  32         first_device = last_device = NULL;
  33         dummy = new DEVICE(this, emu);  // must be 1st device
  34         event = new EVENT(this, emu);   // must be 2nd device
  35
  36         drec = new DATAREC(this, emu);
  37         cpu = new MC6800(this, emu);
  38         pia = new MC6820(this, emu);
  39
  40         memory = new MEMORY(this, emu);
  41
  42         // set contexts
  43         event->set_context_cpu(cpu);
  44         event->set_context_sound(drec);
  45         event->set_context_sound(memory);
  46
  47         drec->set_context_ear(memory, SIG_MEMORY_DATAREC_EAR, 1);
  48
  49         memory->set_context_drec(drec);
  50         memory->set_context_cpu(cpu);
  51         memory->set_context_pia(pia);
  52
  53         // cpu bus
  54         cpu->set_context_mem(memory);
  55 #ifdef USE_DEBUGGER
  56         cpu->set_context_debugger(new DEBUGGER(this, emu));
  57 #endif
  58
  59         // initialize all devices
  60         for(DEVICE* device = first_device; device; device = device->next_device) {
  61                 device->initialize();
  62         }
  63 }
  64
  65 VM::~VM()
  66 {
  67         // delete all devices
  68         for(DEVICE* device = first_device; device;) {
  69                 DEVICE *next_device = device->next_device;
  70                 device->release();
  71                 delete device;
  72                 device = next_device;
  73         }
  74 }
  75
  76 DEVICE* VM::get_device(int id)
  77 {
  78         for(DEVICE* device = first_device; device; device = device->next_device) {
  79                 if(device->this_device_id == id) {
  80                         return device;
  81                 }
  82         }
  83         return NULL;
  84 }
  85
  86 // ----------------------------------------------------------------------------
  87 // drive virtual machine
  88 // ----------------------------------------------------------------------------
  89
  90 void VM::reset()
  91 {
  92         // reset all devices
  93         for(DEVICE* device = first_device; device; device = device->next_device) {
  94                 device->reset();
  95         }
  96 }
  97
  98 void VM::special_reset()
  99 {
 100         // reset all devices
 101         for(DEVICE* device = first_device; device; device = device->next_device) {
 102                 device->reset();
 103         }
 104 }
 105
 106 void VM::run()
 107 {
 108         event->drive();
 109 }
 110
 111 double VM::get_frame_rate()
 112 {
 113         return event->get_frame_rate();
 114 }
 115
 116 // ----------------------------------------------------------------------------
 117 // debugger
 118 // ----------------------------------------------------------------------------
 119
 120 #ifdef USE_DEBUGGER
 121 DEVICE *VM::get_cpu(int index)
 122 {
 123         if(index == 0) {
 124                 return cpu;
 125         }
 126         return NULL;
 127 }
 128 #endif
 129
 130 // ----------------------------------------------------------------------------
 131 // draw screen
 132 // ----------------------------------------------------------------------------
 133
 134 void VM::draw_screen()
 135 {
 136         memory->draw_screen();
 137 }
 138
 139 // ----------------------------------------------------------------------------
 140 // soud manager
 141 // ----------------------------------------------------------------------------
 142
 143 void VM::initialize_sound(int rate, int samples)
 144 {
 145         // init sound manager
 146         event->initialize_sound(rate, samples);
 147 }
 148
 149 uint16* VM::create_sound(int* extra_frames)
 150 {
 151         return event->create_sound(extra_frames);
 152 }
 153
 154 int VM::get_sound_buffer_ptr()
 155 {
 156         return event->get_sound_buffer_ptr();
 157 }
 158
 159 #ifdef USE_SOUND_VOLUME
 160 void VM::set_sound_device_volume(int ch, int decibel_l, int decibel_r)
 161 {
 162         if(ch == 0) {
 163                 memory->set_volume(0, decibel_l, decibel_r);
 164         } else if(ch == 1) {
 165                 drec->set_volume(0, decibel_l, decibel_r);
 166         }
 167 }
 168 #endif
 169
 170 // ----------------------------------------------------------------------------
 171 // notify key
 172 // ----------------------------------------------------------------------------
 173
 174 void VM::key_down(int code, bool repeat)
 175 {
 176         if(!repeat) {
 177                 memory->key_down(code);
 178         }
 179 }
 180
 181 void VM::key_up(int code)
 182 {
 183 }
 184
 185 // ----------------------------------------------------------------------------
 186 // user interface
 187 // ----------------------------------------------------------------------------
 188
 189 void VM::play_tape(const _TCHAR* file_path)
 190 {
 191         drec->play_tape(file_path);
 192         push_play();
 193 }
 194
 195 void VM::rec_tape(const _TCHAR* file_path)
 196 {
 197         drec->rec_tape(file_path);
 198         push_play();
 199 }
 200
 201 void VM::close_tape()
 202 {
 203         push_stop();
 204         drec->close_tape();
 205 }
 206
 207 bool VM::is_tape_inserted()
 208 {
 209         return drec->is_tape_inserted();
 210 }
 211
 212 bool VM::is_tape_playing()
 213 {
 214         return drec->is_tape_playing();
 215 }
 216
 217 bool VM::is_tape_recording()
 218 {
 219         return drec->is_tape_recording();
 220 }
 221
 222 int VM::get_tape_position()
 223 {
 224         return drec->get_tape_position();
 225 }
 226
 227 void VM::push_play()
 228 {
 229         drec->set_ff_rew(0);
 230         drec->set_remote(true);
 231 }
 232
 233 void VM::push_stop()
 234 {
 235         drec->set_remote(false);
 236 }
 237
 238 void VM::push_fast_forward()
 239 {
 240         drec->set_ff_rew(1);
 241         drec->set_remote(true);
 242 }
 243
 244 void VM::push_fast_rewind()
 245 {
 246         drec->set_ff_rew(-1);
 247         drec->set_remote(true);
 248 }
 249
 250 bool VM::is_frame_skippable()
 251 {
 252         return event->is_frame_skippable();
 253 }
 254
 255 void VM::update_config()
 256 {
 257         for(DEVICE* device = first_device; device; device = device->next_device) {
 258                 device->update_config();
 259         }
 260 }
 261
 262 #define STATE_VERSION   1
 263
 264 void VM::save_state(FILEIO* state_fio)
 265 {
 266         state_fio->FputUint32(STATE_VERSION);
 267
 268         for(DEVICE* device = first_device; device; device = device->next_device) {
 269                 device->save_state(state_fio);
 270         }
 271 }
 272
 273 bool VM::load_state(FILEIO* state_fio)
 274 {
 275         if(state_fio->FgetUint32() != STATE_VERSION) {
 276                 return false;
 277         }
 278         for(DEVICE* device = first_device; device; device = device->next_device) {
 279                 if(!device->load_state(state_fio)) {
 280                         return false;
 281                 }
 282         }
 283         return true;
 284 }
 285