source/src/vm/familybasic/familybasic.cpp

   1 /*
   2         Nintendo Family BASIC Emulator 'eFamilyBASIC'
   3
   4         Origin : nester
   5         Author : Takeda.Toshiya
   6         Date   : 2010.08.11-
   7
   8         [ virtual machine ]
   9 */
  10
  11 #include "familybasic.h"
  12 #include "../../emu.h"
  13 #include "../device.h"
  14 #include "../event.h"
  15
  16 #include "../datarec.h"
  17 #include "../m6502.h"
  18
  19 #include "memory.h"
  20 #include "apu.h"
  21 #include "ppu.h"
  22
  23 // ----------------------------------------------------------------------------
  24 // initialize
  25 // ----------------------------------------------------------------------------
  26
  27 VM::VM(EMU* parent_emu) : emu(parent_emu)
  28 {
  29         // check configs
  30 //      boot_mode = config.boot_mode;
  31         boot_mode = -1;
  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         drec = new DATAREC(this, emu);
  39         cpu = new M6502(this, emu);
  40
  41         memory = new MEMORY(this, emu);
  42         apu = new APU(this, emu);
  43         ppu = new PPU(this, emu);
  44
  45         // set contexts
  46         event->set_context_cpu(cpu);
  47         event->set_context_sound(apu);
  48         event->set_context_sound(drec);
  49
  50         memory->set_context_cpu(cpu);
  51         memory->set_context_apu(apu);
  52         memory->set_context_ppu(ppu);
  53         memory->set_context_drec(drec);
  54         memory->set_spr_ram_ptr(ppu->get_spr_ram());
  55         apu->set_context_cpu(cpu);
  56         apu->set_context_memory(memory);
  57         ppu->set_context_cpu(cpu);
  58
  59         // cpu bus
  60         cpu->set_context_mem(memory);
  61         cpu->set_context_intr(dummy);
  62
  63         // initialize all devices
  64         for(DEVICE* device = first_device; device; device = device->next_device) {
  65                 device->initialize();
  66         }
  67 }
  68
  69 VM::~VM()
  70 {
  71         // delete all devices
  72         for(DEVICE* device = first_device; device;) {
  73                 DEVICE *next_device = device->next_device;
  74                 device->release();
  75                 delete device;
  76                 device = next_device;
  77         }
  78 }
  79
  80 DEVICE* VM::get_device(int id)
  81 {
  82         for(DEVICE* device = first_device; device; device = device->next_device) {
  83                 if(device->this_device_id == id) {
  84                         return device;
  85                 }
  86         }
  87         return NULL;
  88 }
  89
  90 // ----------------------------------------------------------------------------
  91 // drive virtual machine
  92 // ----------------------------------------------------------------------------
  93
  94 void VM::reset()
  95 {
  96         // load basic rom
  97         if(boot_mode != config.boot_mode) {
  98                 if(boot_mode != -1) {
  99                         memory->save_backup();
 100                 }
 101                 if(config.boot_mode == 0) {
 102                         memory->load_rom_image(_T("BASIC_V2.NES"));
 103                         ppu->load_rom_image(_T("BASIC_V2.NES"));
 104                 } else if(config.boot_mode == 1) {
 105                         memory->load_rom_image(_T("BASIC_V3.NES"));
 106                         ppu->load_rom_image(_T("BASIC_V3.NES"));
 107                 } else {
 108                         memory->load_rom_image(_T("PLAYBOX_BASIC.NES"));
 109                         ppu->load_rom_image(_T("PLAYBOX_BASIC.NES"));
 110                 }
 111                 boot_mode = config.boot_mode;
 112         }
 113
 114         // reset all devices
 115         for(DEVICE* device = first_device; device; device = device->next_device) {
 116                 device->reset();
 117         }
 118 }
 119
 120 void VM::run()
 121 {
 122         event->drive();
 123 }
 124
 125 // ----------------------------------------------------------------------------
 126 // draw screen
 127 // ----------------------------------------------------------------------------
 128
 129 void VM::draw_screen()
 130 {
 131         ppu->draw_screen();
 132 }
 133
 134 // ----------------------------------------------------------------------------
 135 // soud manager
 136 // ----------------------------------------------------------------------------
 137
 138 void VM::initialize_sound(int rate, int samples)
 139 {
 140         // init sound manager
 141         event->initialize_sound(rate, samples);
 142
 143         // init sound gen
 144         apu->initialize_sound(rate, samples);
 145 }
 146
 147 uint16* VM::create_sound(int* extra_frames)
 148 {
 149         return event->create_sound(extra_frames);
 150 }
 151
 152 int VM::sound_buffer_ptr()
 153 {
 154         return event->sound_buffer_ptr();
 155 }
 156
 157 #ifdef USE_SOUND_VOLUME
 158 void VM::set_sound_device_volume(int ch, int decibel_l, int decibel_r)
 159 {
 160         if(ch == 0) {
 161                 apu->set_volume(0, decibel_l, decibel_r);
 162         } else if(ch == 1) {
 163                 drec->set_volume(0, decibel_l, decibel_r);
 164         }
 165 }
 166 #endif
 167
 168 // ----------------------------------------------------------------------------
 169 // user interface
 170 // ----------------------------------------------------------------------------
 171
 172 void VM::play_tape(const _TCHAR* file_path)
 173 {
 174         drec->play_tape(file_path);
 175         drec->write_signal(SIG_DATAREC_REMOTE, 1, 1);
 176 }
 177
 178 void VM::rec_tape(const _TCHAR* file_path)
 179 {
 180         drec->rec_tape(file_path);
 181         drec->write_signal(SIG_DATAREC_REMOTE, 1, 1);
 182 }
 183
 184 void VM::close_tape()
 185 {
 186         drec->close_tape();
 187         drec->write_signal(SIG_DATAREC_REMOTE, 0, 1);
 188 }
 189
 190 bool VM::tape_inserted()
 191 {
 192         return drec->tape_inserted();
 193 }
 194
 195 bool VM::tape_playing()
 196 {
 197         return drec->tape_playing();
 198 }
 199
 200 bool VM::tape_recording()
 201 {
 202         return drec->tape_recording();
 203 }
 204
 205 int VM::tape_position()
 206 {
 207         return drec->tape_position();
 208 }
 209
 210 bool VM::now_skip()
 211 {
 212         return event->now_skip();
 213 }
 214
 215 void VM::update_config()
 216 {
 217         if(boot_mode != config.boot_mode) {
 218                 // boot mode is changed !!!
 219 //              boot_mode = config.boot_mode;
 220                 reset();
 221         } else {
 222                 for(DEVICE* device = first_device; device; device = device->next_device) {
 223                         device->update_config();
 224                 }
 225         }
 226 }
 227
 228 #define STATE_VERSION   1
 229
 230 void VM::save_state(FILEIO* state_fio)
 231 {
 232         state_fio->FputUint32(STATE_VERSION);
 233
 234         for(DEVICE* device = first_device; device; device = device->next_device) {
 235                 device->save_state(state_fio);
 236         }
 237         state_fio->FputInt32(boot_mode);
 238 }
 239
 240 bool VM::load_state(FILEIO* state_fio)
 241 {
 242         if(state_fio->FgetUint32() != STATE_VERSION) {
 243                 return false;
 244         }
 245         for(DEVICE* device = first_device; device; device = device->next_device) {
 246                 if(!device->load_state(state_fio)) {
 247                         return false;
 248                 }
 249         }
 250         boot_mode = state_fio->FgetInt32();
 251         return true;
 252 }
 253