source/src/vm/scv/scv.cpp

   1 /*
   2         EPOCH Super Cassette Vision Emulator 'eSCV'
   3
   4         Author : Takeda.Toshiya
   5         Date   : 2006.08.21 -
   6
   7         [ virtual machine ]
   8 */
   9
  10 #include "scv.h"
  11 #include "../../emu.h"
  12 #include "../device.h"
  13 #include "../event.h"
  14
  15 #include "../upd7801.h"
  16
  17 #ifdef USE_DEBUGGER
  18 #include "../debugger.h"
  19 #endif
  20
  21 #include "io.h"
  22 #include "memory.h"
  23 #include "sound.h"
  24 #include "vdp.h"
  25
  26 // ----------------------------------------------------------------------------
  27 // initialize
  28 // ----------------------------------------------------------------------------
  29
  30 VM::VM(EMU* parent_emu) : VM_TEMPLATE(parent_emu)
  31 {
  32         // create devices
  33         first_device = last_device = NULL;
  34         dummy = new DEVICE(this, emu);  // must be 1st device
  35         event = new EVENT(this, emu);   // must be 2nd device
  36         dummy->set_device_name(_T("1st Dummy"));
  37         cpu = new UPD7801(this, emu);
  38
  39         io = new IO(this, emu);
  40         memory = new MEMORY(this, emu);
  41         sound = new SOUND(this, emu);
  42         vdp = new VDP(this, emu);
  43
  44         // set contexts
  45         event->set_context_cpu(cpu);
  46         event->set_context_sound(sound);
  47
  48         io->set_context_mem(memory);
  49         io->set_context_sound(sound);
  50         memory->set_context_sound(sound);
  51         sound->set_context_cpu(cpu);
  52         vdp->set_context_cpu(cpu);
  53         vdp->set_font_ptr(memory->get_font());
  54         vdp->set_vram_ptr(memory->get_vram());
  55
  56         // cpu bus
  57         cpu->set_context_mem(memory);
  58         cpu->set_context_io(io);
  59 #ifdef USE_DEBUGGER
  60         cpu->set_context_debugger(new DEBUGGER(this, emu));
  61 #endif
  62
  63         // initialize all devices
  64 #if defined(__GIT_REPO_VERSION)
  65         strncpy(_git_revision, __GIT_REPO_VERSION, sizeof(_git_revision) - 1);
  66 #endif
  67         for(DEVICE* device = first_device; device; device = device->next_device) {
  68                 device->initialize();
  69         }
  70         decl_state();
  71 }
  72
  73 VM::~VM()
  74 {
  75         // delete all devices
  76         for(DEVICE* device = first_device; device;) {
  77                 DEVICE *next_device = device->next_device;
  78                 device->release();
  79                 delete device;
  80                 device = next_device;
  81         }
  82 }
  83
  84 DEVICE* VM::get_device(int id)
  85 {
  86         for(DEVICE* device = first_device; device; device = device->next_device) {
  87                 if(device->this_device_id == id) {
  88                         return device;
  89                 }
  90         }
  91         return NULL;
  92 }
  93
  94 // ----------------------------------------------------------------------------
  95 // drive virtual machine
  96 // ----------------------------------------------------------------------------
  97
  98 void VM::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 // ----------------------------------------------------------------------------
 112 // debugger
 113 // ----------------------------------------------------------------------------
 114
 115 #ifdef USE_DEBUGGER
 116 DEVICE *VM::get_cpu(int index)
 117 {
 118         if(index == 0) {
 119                 return cpu;
 120         }
 121         return NULL;
 122 }
 123 #endif
 124
 125 // ----------------------------------------------------------------------------
 126 // draw screen
 127 // ----------------------------------------------------------------------------
 128
 129 void VM::draw_screen()
 130 {
 131         vdp->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         sound->initialize_sound(rate);
 145 }
 146
 147 uint16_t* VM::create_sound(int* extra_frames)
 148 {
 149         return event->create_sound(extra_frames);
 150 }
 151
 152 int VM::get_sound_buffer_ptr()
 153 {
 154         return event->get_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         sound->set_volume(ch, decibel_l, decibel_r);
 161 }
 162 #endif
 163
 164 // ----------------------------------------------------------------------------
 165 // user interface
 166 // ----------------------------------------------------------------------------
 167
 168 void VM::open_cart(int drv, const _TCHAR* file_path)
 169 {
 170         if(drv == 0) {
 171                 memory->open_cart(file_path);
 172                 reset();
 173         }
 174 }
 175
 176 void VM::close_cart(int drv)
 177 {
 178         if(drv == 0) {
 179                 memory->close_cart();
 180                 reset();
 181         }
 182 }
 183
 184 bool VM::is_cart_inserted(int drv)
 185 {
 186         if(drv == 0) {
 187                 return memory->is_cart_inserted();
 188         } else {
 189                 return false;
 190         }
 191 }
 192
 193 bool VM::is_frame_skippable()
 194 {
 195         return event->is_frame_skippable();
 196 }
 197
 198 void VM::update_config()
 199 {
 200         for(DEVICE* device = first_device; device; device = device->next_device) {
 201                 device->update_config();
 202         }
 203 }
 204
 205 #define STATE_VERSION   2
 206
 207 #include "../../statesub.h"
 208 #include "../../qt/gui/csp_logger.h"
 209 extern CSP_Logger DLL_PREFIX_I *csp_logger;
 210
 211 void VM::decl_state(void)
 212 {
 213         state_entry = new csp_state_utils(STATE_VERSION, 0, (_TCHAR *)(_T("CSP::SCV_HEAD")), csp_logger);
 214         for(DEVICE* device = first_device; device; device = device->next_device) {
 215                 device->decl_state();
 216         }
 217 }
 218
 219 void VM::save_state(FILEIO* state_fio)
 220 {
 221         //state_fio->FputUint32(STATE_VERSION);
 222
 223         if(state_entry != NULL) {
 224                 state_entry->save_state(state_fio);
 225         }
 226         for(DEVICE* device = first_device; device; device = device->next_device) {
 227                 device->save_state(state_fio);
 228         }
 229 }
 230
 231 bool VM::load_state(FILEIO* state_fio)
 232 {
 233         //if(state_fio->FgetUint32() != STATE_VERSION) {
 234         //      return false;
 235         //}
 236         bool mb = false;
 237         if(state_entry != NULL) {
 238                 mb = state_entry->load_state(state_fio);
 239         }
 240         if(!mb) {
 241                 emu->out_debug_log("INFO: HEADER DATA ERROR");
 242                 return false;
 243         }
 244         for(DEVICE* device = first_device; device; device = device->next_device) {
 245                 if(!device->load_state(state_fio)) {
 246                         return false;
 247                 }
 248         }
 249         return true;
 250 }
 251