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         for(DEVICE* device = first_device; device; device = device->next_device) {
  65                 device->initialize();
  66         }
  67         decl_state();
  68 }
  69
  70 VM::~VM()
  71 {
  72         // delete all devices
  73         for(DEVICE* device = first_device; device;) {
  74                 DEVICE *next_device = device->next_device;
  75                 device->release();
  76                 delete device;
  77                 device = next_device;
  78         }
  79 }
  80
  81 DEVICE* VM::get_device(int id)
  82 {
  83         for(DEVICE* device = first_device; device; device = device->next_device) {
  84                 if(device->this_device_id == id) {
  85                         return device;
  86                 }
  87         }
  88         return NULL;
  89 }
  90
  91 // ----------------------------------------------------------------------------
  92 // drive virtual machine
  93 // ----------------------------------------------------------------------------
  94
  95 void VM::reset()
  96 {
  97         // reset all devices
  98         for(DEVICE* device = first_device; device; device = device->next_device) {
  99                 device->reset();
 100         }
 101 }
 102
 103 void VM::run()
 104 {
 105         event->drive();
 106 }
 107
 108 // ----------------------------------------------------------------------------
 109 // debugger
 110 // ----------------------------------------------------------------------------
 111
 112 #ifdef USE_DEBUGGER
 113 DEVICE *VM::get_cpu(int index)
 114 {
 115         if(index == 0) {
 116                 return cpu;
 117         }
 118         return NULL;
 119 }
 120 #endif
 121
 122 // ----------------------------------------------------------------------------
 123 // draw screen
 124 // ----------------------------------------------------------------------------
 125
 126 void VM::draw_screen()
 127 {
 128         vdp->draw_screen();
 129 }
 130
 131 // ----------------------------------------------------------------------------
 132 // soud manager
 133 // ----------------------------------------------------------------------------
 134
 135 void VM::initialize_sound(int rate, int samples)
 136 {
 137         // init sound manager
 138         event->initialize_sound(rate, samples);
 139
 140         // init sound gen
 141         sound->initialize_sound(rate);
 142 }
 143
 144 uint16_t* VM::create_sound(int* extra_frames)
 145 {
 146         return event->create_sound(extra_frames);
 147 }
 148
 149 int VM::get_sound_buffer_ptr()
 150 {
 151         return event->get_sound_buffer_ptr();
 152 }
 153
 154 #ifdef USE_SOUND_VOLUME
 155 void VM::set_sound_device_volume(int ch, int decibel_l, int decibel_r)
 156 {
 157         sound->set_volume(ch, decibel_l, decibel_r);
 158 }
 159 #endif
 160
 161 // ----------------------------------------------------------------------------
 162 // user interface
 163 // ----------------------------------------------------------------------------
 164
 165 void VM::open_cart(int drv, const _TCHAR* file_path)
 166 {
 167         if(drv == 0) {
 168                 memory->open_cart(file_path);
 169                 reset();
 170         }
 171 }
 172
 173 void VM::close_cart(int drv)
 174 {
 175         if(drv == 0) {
 176                 memory->close_cart();
 177                 reset();
 178         }
 179 }
 180
 181 bool VM::is_cart_inserted(int drv)
 182 {
 183         if(drv == 0) {
 184                 return memory->is_cart_inserted();
 185         } else {
 186                 return false;
 187         }
 188 }
 189
 190 bool VM::is_frame_skippable()
 191 {
 192         return event->is_frame_skippable();
 193 }
 194
 195 void VM::update_config()
 196 {
 197         for(DEVICE* device = first_device; device; device = device->next_device) {
 198                 device->update_config();
 199         }
 200 }
 201
 202 #define STATE_VERSION   2
 203
 204 #include "../../statesub.h"
 205 #include "../../qt/gui/csp_logger.h"
 206 extern CSP_Logger DLL_PREFIX_I *csp_logger;
 207
 208 void VM::decl_state(void)
 209 {
 210         state_entry = new csp_state_utils(STATE_VERSION, 0, (_TCHAR *)(_T("CSP::SCV_HEAD")), csp_logger);
 211         for(DEVICE* device = first_device; device; device = device->next_device) {
 212                 device->decl_state();
 213         }
 214 }
 215
 216 void VM::save_state(FILEIO* state_fio)
 217 {
 218         //state_fio->FputUint32(STATE_VERSION);
 219
 220         if(state_entry != NULL) {
 221                 state_entry->save_state(state_fio);
 222         }
 223         for(DEVICE* device = first_device; device; device = device->next_device) {
 224                 device->save_state(state_fio);
 225         }
 226 }
 227
 228 bool VM::load_state(FILEIO* state_fio)
 229 {
 230         //if(state_fio->FgetUint32() != STATE_VERSION) {
 231         //      return false;
 232         //}
 233         bool mb = false;
 234         if(state_entry != NULL) {
 235                 mb = state_entry->load_state(state_fio);
 236         }
 237         if(!mb) {
 238                 emu->out_debug_log("INFO: HEADER DATA ERROR");
 239                 return false;
 240         }
 241         for(DEVICE* device = first_device; device; device = device->next_device) {
 242                 if(!device->load_state(state_fio)) {
 243                         return false;
 244                 }
 245         }
 246         return true;
 247 }
 248