source/src/vm/z80tvgame/z80tvgame.cpp

   1 /*
   2         Homebrew Z80 TV GAME SYSTEM Emulator 'eZ80TVGAME'
   3
   4         Author : Takeda.Toshiya
   5         Date   : 2015.04.28-
   6
   7         [ virtual machine ]
   8 */
   9
  10 // http://w01.tp1.jp/~a571632211/z80tvgame/index.html
  11
  12 #include "z80tvgame.h"
  13 #include "../../emu.h"
  14 #include "../device.h"
  15 #include "../event.h"
  16
  17 #ifdef _USE_I8255
  18 #include "../i8255.h"
  19 #else
  20 #include "../z80pio.h"
  21 #endif
  22 #include "../pcm1bit.h"
  23 #include "../z80.h"
  24
  25 #ifdef USE_DEBUGGER
  26 #include "../debugger.h"
  27 #endif
  28
  29 #include "joystick.h"
  30 #include "memory.h"
  31
  32 // ----------------------------------------------------------------------------
  33 // initialize
  34 // ----------------------------------------------------------------------------
  35
  36 VM::VM(EMU* parent_emu) : VM_TEMPLATE(parent_emu)
  37 {
  38         // create devices
  39         first_device = last_device = NULL;
  40         dummy = new DEVICE(this, emu);  // must be 1st device
  41         event = new EVENT(this, emu);   // must be 2nd device
  42         dummy->set_device_name(_T("1st Dummy"));
  43
  44 #ifdef _USE_I8255
  45         pio = new I8255(this, emu);
  46 #else
  47         pio = new Z80PIO(this, emu);
  48 #endif
  49         pcm = new PCM1BIT(this, emu);
  50         cpu = new Z80(this, emu);
  51
  52         joystick = new JOYSTICK(this, emu);
  53         memory = new MEMORY(this, emu);
  54
  55         // set contexts
  56         event->set_context_cpu(cpu);
  57         event->set_context_sound(pcm);
  58
  59         // Sound:: Force realtime rendering. This is temporally fix. 20161024 K.O
  60         //pcm->set_realtime_render(true);
  61
  62 #ifdef _USE_I8255
  63         pio->set_context_port_c(pcm, SIG_PCM1BIT_SIGNAL, 1, 0);
  64 #else
  65         pio->set_context_port_b(pcm, SIG_PCM1BIT_SIGNAL, 1, 0);
  66 #endif
  67         joystick->set_context_pio(pio);
  68
  69         // cpu bus
  70         cpu->set_context_mem(memory);
  71         cpu->set_context_io(pio);
  72         cpu->set_context_intr(dummy);
  73 #ifdef USE_DEBUGGER
  74         cpu->set_context_debugger(new DEBUGGER(this, emu));
  75 #endif
  76
  77         // initialize all devices
  78         for(DEVICE* device = first_device; device; device = device->next_device) {
  79                 device->initialize();
  80         }
  81         decl_state();
  82 }
  83
  84 VM::~VM()
  85 {
  86         // delete all devices
  87         for(DEVICE* device = first_device; device;) {
  88                 DEVICE *next_device = device->next_device;
  89                 device->release();
  90                 delete device;
  91                 device = next_device;
  92         }
  93 }
  94
  95 DEVICE* VM::get_device(int id)
  96 {
  97         for(DEVICE* device = first_device; device; device = device->next_device) {
  98                 if(device->this_device_id == id) {
  99                         return device;
 100                 }
 101         }
 102         return NULL;
 103 }
 104
 105 // ----------------------------------------------------------------------------
 106 // debugger
 107 // ----------------------------------------------------------------------------
 108
 109 #ifdef USE_DEBUGGER
 110 DEVICE *VM::get_cpu(int index)
 111 {
 112         if(index == 0) {
 113                 return cpu;
 114         }
 115         return NULL;
 116 }
 117 #endif
 118
 119 // ----------------------------------------------------------------------------
 120 // drive virtual machine
 121 // ----------------------------------------------------------------------------
 122
 123 void VM::reset()
 124 {
 125         // reset all devices
 126         for(DEVICE* device = first_device; device; device = device->next_device) {
 127                 device->reset();
 128         }
 129 }
 130
 131 void VM::run()
 132 {
 133         event->drive();
 134 }
 135
 136 // ----------------------------------------------------------------------------
 137 // draw screen
 138 // ----------------------------------------------------------------------------
 139
 140 void VM::draw_screen()
 141 {
 142         memory->draw_screen();
 143 }
 144
 145 // ----------------------------------------------------------------------------
 146 // soud manager
 147 // ----------------------------------------------------------------------------
 148
 149 void VM::initialize_sound(int rate, int samples)
 150 {
 151         // init sound manager
 152         event->initialize_sound(rate, samples);
 153
 154         // init sound gen
 155         pcm->initialize_sound(rate, 8000);
 156 }
 157
 158 uint16_t* VM::create_sound(int* extra_frames)
 159 {
 160         return event->create_sound(extra_frames);
 161 }
 162
 163 int VM::get_sound_buffer_ptr()
 164 {
 165         return event->get_sound_buffer_ptr();
 166 }
 167
 168 #ifdef USE_SOUND_VOLUME
 169 void VM::set_sound_device_volume(int ch, int decibel_l, int decibel_r)
 170 {
 171         if(ch == 0) {
 172                 pcm->set_volume(0, decibel_l, decibel_r);
 173         }
 174 }
 175 #endif
 176
 177 // ----------------------------------------------------------------------------
 178 // user interface
 179 // ----------------------------------------------------------------------------
 180
 181 void VM::open_cart(int drv, const _TCHAR* file_path)
 182 {
 183         if(drv == 0) {
 184                 memory->open_cart(file_path);
 185                 reset();
 186         }
 187 }
 188
 189 void VM::close_cart(int drv)
 190 {
 191         if(drv == 0) {
 192                 memory->close_cart();
 193                 reset();
 194         }
 195 }
 196
 197 bool VM::is_cart_inserted(int drv)
 198 {
 199         if(drv == 0) {
 200                 return memory->is_cart_inserted();
 201         } else {
 202                 return false;
 203         }
 204 }
 205
 206 bool VM::is_frame_skippable()
 207 {
 208         return event->is_frame_skippable();
 209 }
 210
 211 void VM::update_config()
 212 {
 213         for(DEVICE* device = first_device; device; device = device->next_device) {
 214                 device->update_config();
 215         }
 216 }
 217
 218 #define STATE_VERSION   2
 219
 220 #include "../../statesub.h"
 221 #include "../../qt/gui/csp_logger.h"
 222 extern CSP_Logger DLL_PREFIX_I *csp_logger;
 223
 224 void VM::decl_state(void)
 225 {
 226 #if defined(_USE_I8255)
 227         state_entry = new csp_state_utils(STATE_VERSION, 0, (_TCHAR *)(_T("CSP::Z80_TV_GAME_I8255_HEAD")), csp_logger);
 228 #else
 229         state_entry = new csp_state_utils(STATE_VERSION, 0, (_TCHAR *)(_T("CSP::Z80_TV_GAME_Z80PIO_HEAD")), csp_logger);
 230 #endif
 231         for(DEVICE* device = first_device; device; device = device->next_device) {
 232                 device->decl_state();
 233         }
 234 }
 235
 236 void VM::save_state(FILEIO* state_fio)
 237 {
 238         //state_fio->FputUint32(STATE_VERSION);
 239
 240         if(state_entry != NULL) {
 241                 state_entry->save_state(state_fio);
 242         }
 243         for(DEVICE* device = first_device; device; device = device->next_device) {
 244                 device->save_state(state_fio);
 245         }
 246 }
 247
 248 bool VM::load_state(FILEIO* state_fio)
 249 {
 250         //if(state_fio->FgetUint32() != STATE_VERSION) {
 251         //      return false;
 252         //}
 253         bool mb = false;
 254         if(state_entry != NULL) {
 255                 mb = state_entry->load_state(state_fio);
 256         }
 257         if(!mb) {
 258                 emu->out_debug_log("INFO: HEADER DATA ERROR");
 259                 return false;
 260         }
 261         for(DEVICE* device = first_device; device; device = device->next_device) {
 262                 if(!device->load_state(state_fio)) {
 263                         return false;
 264                 }
 265         }
 266         return true;
 267 }
 268