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::frame_rate()
 112 {
 113         return event->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::sound_buffer_ptr()
 155 {
 156         return event->sound_buffer_ptr();
 157 }
 158
 159 // ----------------------------------------------------------------------------
 160 // notify key
 161 // ----------------------------------------------------------------------------
 162
 163 void VM::key_down(int code, bool repeat)
 164 {
 165         if(!repeat) {
 166                 memory->key_down(code);
 167         }
 168 }
 169
 170 void VM::key_up(int code)
 171 {
 172 }
 173
 174 // ----------------------------------------------------------------------------
 175 // user interface
 176 // ----------------------------------------------------------------------------
 177
 178 void VM::play_tape(const _TCHAR* file_path)
 179 {
 180         drec->play_tape(file_path);
 181         push_play();
 182 }
 183
 184 void VM::rec_tape(const _TCHAR* file_path)
 185 {
 186         drec->rec_tape(file_path);
 187         push_play();
 188 }
 189
 190 void VM::close_tape()
 191 {
 192         push_stop();
 193         drec->close_tape();
 194 }
 195
 196 bool VM::tape_inserted()
 197 {
 198         return drec->tape_inserted();
 199 }
 200
 201 void VM::push_play()
 202 {
 203         drec->set_ff_rew(0);
 204         drec->set_remote(true);
 205 }
 206
 207 void VM::push_stop()
 208 {
 209         drec->set_remote(false);
 210 }
 211
 212 void VM::push_fast_forward()
 213 {
 214         drec->set_ff_rew(1);
 215         drec->set_remote(true);
 216 }
 217
 218 void VM::push_fast_rewind()
 219 {
 220         drec->set_ff_rew(-1);
 221         drec->set_remote(true);
 222 }
 223
 224 bool VM::get_tape_play(void)
 225 {
 226         return drec->get_tape_play();
 227 }
 228
 229 bool VM::now_skip()
 230 {
 231         return event->now_skip();
 232 }
 233
 234 void VM::update_config()
 235 {
 236         for(DEVICE* device = first_device; device; device = device->next_device) {
 237                 device->update_config();
 238         }
 239 }
 240
 241 #define STATE_VERSION   1
 242
 243 void VM::save_state(FILEIO* state_fio)
 244 {
 245         state_fio->FputUint32(STATE_VERSION);
 246
 247         for(DEVICE* device = first_device; device; device = device->next_device) {
 248                 device->save_state(state_fio);
 249         }
 250 }
 251
 252 bool VM::load_state(FILEIO* state_fio)
 253 {
 254         if(state_fio->FgetUint32() != STATE_VERSION) {
 255                 return false;
 256         }
 257         for(DEVICE* device = first_device; device; device = device->next_device) {
 258                 if(!device->load_state(state_fio)) {
 259                         return false;
 260                 }
 261         }
 262         return true;
 263 }
 264