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 #if defined(__GIT_REPO_VERSION)
  79         strncpy(_git_revision, __GIT_REPO_VERSION, sizeof(_git_revision) - 1);
  80 #endif
  81         for(DEVICE* device = first_device; device; device = device->next_device) {
  82                 device->initialize();
  83         }
  84         decl_state();
  85 }
  86
  87 VM::~VM()
  88 {
  89         // delete all devices
  90         for(DEVICE* device = first_device; device;) {
  91                 DEVICE *next_device = device->next_device;
  92                 device->release();
  93                 delete device;
  94                 device = next_device;
  95         }
  96 }
  97
  98 DEVICE* VM::get_device(int id)
  99 {
 100         for(DEVICE* device = first_device; device; device = device->next_device) {
 101                 if(device->this_device_id == id) {
 102                         return device;
 103                 }
 104         }
 105         return NULL;
 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 // drive virtual machine
 124 // ----------------------------------------------------------------------------
 125
 126 void VM::reset()
 127 {
 128         // reset all devices
 129         for(DEVICE* device = first_device; device; device = device->next_device) {
 130                 device->reset();
 131         }
 132 }
 133
 134 void VM::run()
 135 {
 136         event->drive();
 137 }
 138
 139 // ----------------------------------------------------------------------------
 140 // draw screen
 141 // ----------------------------------------------------------------------------
 142
 143 void VM::draw_screen()
 144 {
 145         memory->draw_screen();
 146 }
 147
 148 // ----------------------------------------------------------------------------
 149 // soud manager
 150 // ----------------------------------------------------------------------------
 151
 152 void VM::initialize_sound(int rate, int samples)
 153 {
 154         // init sound manager
 155         event->initialize_sound(rate, samples);
 156
 157         // init sound gen
 158         pcm->initialize_sound(rate, 8000);
 159 }
 160
 161 uint16_t* VM::create_sound(int* extra_frames)
 162 {
 163         return event->create_sound(extra_frames);
 164 }
 165
 166 int VM::get_sound_buffer_ptr()
 167 {
 168         return event->get_sound_buffer_ptr();
 169 }
 170
 171 #ifdef USE_SOUND_VOLUME
 172 void VM::set_sound_device_volume(int ch, int decibel_l, int decibel_r)
 173 {
 174         if(ch == 0) {
 175                 pcm->set_volume(0, decibel_l, decibel_r);
 176         }
 177 }
 178 #endif
 179
 180 // ----------------------------------------------------------------------------
 181 // user interface
 182 // ----------------------------------------------------------------------------
 183
 184 void VM::open_cart(int drv, const _TCHAR* file_path)
 185 {
 186         if(drv == 0) {
 187                 memory->open_cart(file_path);
 188                 reset();
 189         }
 190 }
 191
 192 void VM::close_cart(int drv)
 193 {
 194         if(drv == 0) {
 195                 memory->close_cart();
 196                 reset();
 197         }
 198 }
 199
 200 bool VM::is_cart_inserted(int drv)
 201 {
 202         if(drv == 0) {
 203                 return memory->is_cart_inserted();
 204         } else {
 205                 return false;
 206         }
 207 }
 208
 209 bool VM::is_frame_skippable()
 210 {
 211         return event->is_frame_skippable();
 212 }
 213
 214 void VM::update_config()
 215 {
 216         for(DEVICE* device = first_device; device; device = device->next_device) {
 217                 device->update_config();
 218         }
 219 }
 220
 221 #define STATE_VERSION   2
 222
 223 #include "../../statesub.h"
 224 #include "../../qt/gui/csp_logger.h"
 225 extern CSP_Logger DLL_PREFIX_I *csp_logger;
 226
 227 void VM::decl_state(void)
 228 {
 229 #if defined(_USE_I8255)
 230         state_entry = new csp_state_utils(STATE_VERSION, 0, (_TCHAR *)(_T("CSP::Z80_TV_GAME_I8255_HEAD")), csp_logger);
 231 #else
 232         state_entry = new csp_state_utils(STATE_VERSION, 0, (_TCHAR *)(_T("CSP::Z80_TV_GAME_Z80PIO_HEAD")), csp_logger);
 233 #endif
 234         for(DEVICE* device = first_device; device; device = device->next_device) {
 235                 device->decl_state();
 236         }
 237 }
 238
 239 void VM::save_state(FILEIO* state_fio)
 240 {
 241         //state_fio->FputUint32(STATE_VERSION);
 242
 243         if(state_entry != NULL) {
 244                 state_entry->save_state(state_fio);
 245         }
 246         for(DEVICE* device = first_device; device; device = device->next_device) {
 247                 device->save_state(state_fio);
 248         }
 249 }
 250
 251 bool VM::load_state(FILEIO* state_fio)
 252 {
 253         //if(state_fio->FgetUint32() != STATE_VERSION) {
 254         //      return false;
 255         //}
 256         bool mb = false;
 257         if(state_entry != NULL) {
 258                 mb = state_entry->load_state(state_fio);
 259         }
 260         if(!mb) {
 261                 emu->out_debug_log("INFO: HEADER DATA ERROR");
 262                 return false;
 263         }
 264         for(DEVICE* device = first_device; device; device = device->next_device) {
 265                 if(!device->load_state(state_fio)) {
 266                         return false;
 267                 }
 268         }
 269         return true;
 270 }
 271