source/src/vm/colecovision/colecovision.cpp

   1 /*
   2         COLECO ColecoVision Emulator 'yaCOLECOVISION'
   3
   4         Author : tanam
   5         Date   : 2016.08.14-
   6
   7         [ virtual machine ]
   8 */
   9
  10 #include "colecovision.h"
  11 #include "../../emu.h"
  12 #include "../device.h"
  13 #include "../event.h"
  14
  15 #include "../io.h"
  16 #include "../sn76489an.h"
  17 #include "../tms9918a.h"
  18 #include "../z80.h"
  19
  20 #ifdef USE_DEBUGGER
  21 #include "../debugger.h"
  22 #endif
  23
  24 #include "keyboard.h"
  25 #include "memory.h"
  26
  27 // ----------------------------------------------------------------------------
  28 // initialize
  29 // ----------------------------------------------------------------------------
  30
  31 VM::VM(EMU* parent_emu) : VM_TEMPLATE(parent_emu)
  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         io = new IO(this, emu);
  39         psg = new SN76489AN(this, emu);
  40         vdp = new TMS9918A(this, emu);
  41         cpu = new Z80(this, emu);
  42
  43         key = new KEYBOARD(this, emu);
  44         memory = new MEMORY(this, emu);
  45
  46         // set contexts
  47         event->set_context_cpu(cpu);
  48         event->set_context_sound(psg);
  49
  50         vdp->set_context_irq(cpu, SIG_CPU_NMI, 1);
  51         key->set_context_cpu(cpu);
  52
  53         // cpu bus
  54         cpu->set_context_mem(memory);
  55         cpu->set_context_io(io);
  56         cpu->set_context_intr(dummy);
  57 #ifdef USE_DEBUGGER
  58         cpu->set_context_debugger(new DEBUGGER(this, emu));
  59 #endif
  60
  61         // i/o bus
  62         io->set_iomap_range_w(0x80, 0x9f, key);
  63         io->set_iomap_range_rw(0xbe, 0xbf, vdp);
  64         io->set_iomap_range_w(0xc0, 0xdf, key);
  65         io->set_iomap_range_r(0xfc, 0xff, key);
  66         io->set_iomap_range_w(0xff, 0xff, psg);
  67
  68         // initialize all devices
  69 #if defined(__GIT_REPO_VERSION)
  70         strncpy(_git_revision, __GIT_REPO_VERSION, sizeof(_git_revision) - 1);
  71 #endif
  72         for(DEVICE* device = first_device; device; device = device->next_device) {
  73                 device->initialize();
  74         }
  75 }
  76
  77 VM::~VM()
  78 {
  79         // delete all devices
  80         for(DEVICE* device = first_device; device;) {
  81                 DEVICE *next_device = device->next_device;
  82                 device->release();
  83                 delete device;
  84                 device = next_device;
  85         }
  86 }
  87
  88 DEVICE* VM::get_device(int id)
  89 {
  90         for(DEVICE* device = first_device; device; device = device->next_device) {
  91                 if(device->this_device_id == id) {
  92                         return device;
  93                 }
  94         }
  95         return NULL;
  96 }
  97
  98 // ----------------------------------------------------------------------------
  99 // debugger
 100 // ----------------------------------------------------------------------------
 101
 102 #ifdef USE_DEBUGGER
 103 DEVICE *VM::get_cpu(int index)
 104 {
 105         if(index == 0) {
 106                 return cpu;
 107         }
 108         return NULL;
 109 }
 110 #endif
 111
 112 // ----------------------------------------------------------------------------
 113 // drive virtual machine
 114 // ----------------------------------------------------------------------------
 115
 116 void VM::reset()
 117 {
 118         // reset all devices
 119         for(DEVICE* device = first_device; device; device = device->next_device) {
 120                 device->reset();
 121         }
 122 }
 123
 124 void VM::run()
 125 {
 126         event->drive();
 127 }
 128
 129 // ----------------------------------------------------------------------------
 130 // draw screen
 131 // ----------------------------------------------------------------------------
 132
 133 void VM::draw_screen()
 134 {
 135         vdp->draw_screen();
 136 }
 137
 138 // ----------------------------------------------------------------------------
 139 // soud manager
 140 // ----------------------------------------------------------------------------
 141
 142 void VM::initialize_sound(int rate, int samples)
 143 {
 144         // init sound manager
 145         event->initialize_sound(rate, samples);
 146
 147         // init sound gen
 148         psg->initialize_sound(rate, 3579545, 8000);
 149 }
 150
 151 uint16_t* VM::create_sound(int* extra_frames)
 152 {
 153         return event->create_sound(extra_frames);
 154 }
 155
 156 int VM::get_sound_buffer_ptr()
 157 {
 158         return event->get_sound_buffer_ptr();
 159 }
 160
 161 #ifdef USE_SOUND_VOLUME
 162 void VM::set_sound_device_volume(int ch, int decibel_l, int decibel_r)
 163 {
 164         if(ch == 0) {
 165                 psg->set_volume(0, decibel_l, decibel_r);
 166         }
 167 }
 168 #endif
 169
 170 // ----------------------------------------------------------------------------
 171 // user interface
 172 // ----------------------------------------------------------------------------
 173
 174 void VM::open_cart(int drv, const _TCHAR* file_path)
 175 {
 176         if(drv == 0) {
 177                 memory->open_cart(file_path);
 178                 reset();
 179         }
 180 }
 181
 182 void VM::close_cart(int drv)
 183 {
 184         if(drv == 0) {
 185                 memory->close_cart();
 186                 reset();
 187         }
 188 }
 189
 190 bool VM::is_cart_inserted(int drv)
 191 {
 192         if(drv == 0) {
 193                 return memory->is_cart_inserted();
 194         } else {
 195                 return false;
 196         }
 197 }
 198
 199 bool VM::is_frame_skippable()
 200 {
 201         return event->is_frame_skippable();
 202 }
 203
 204 void VM::update_config()
 205 {
 206         for(DEVICE* device = first_device; device; device = device->next_device) {
 207                 device->update_config();
 208         }
 209 }
 210
 211 #define STATE_VERSION   2
 212
 213 bool VM::process_state(FILEIO* state_fio, bool loading)
 214 {
 215         if(!state_fio->StateCheckUint32(STATE_VERSION)) {
 216                 return false;
 217         }
 218         for(DEVICE* device = first_device; device; device = device->next_device) {
 219                 // Note: typeid(foo).name is fixed by recent ABI.Not dec 6.
 220                 // const char *name = typeid(*device).name();
 221                 //       But, using get_device_name() instead of typeid(foo).name() 20181008 K.O
 222                 const char *name = device->get_device_name();
 223                 int len = strlen(name);
 224
 225                 if(!state_fio->StateCheckInt32(len)) {
 226                         if(loading) {
 227                                 printf("Class name len Error: DEVID=%d EXPECT=%s\n", device->this_device_id, name);
 228                         }
 229                         return false;
 230                 }
 231                 if(!state_fio->StateCheckBuffer(name, len, 1)) {
 232                         if(loading) {
 233                                 printf("Class name Error: DEVID=%d EXPECT=%s\n", device->this_device_id, name);
 234                         }
 235                         return false;
 236                 }
 237                 if(!device->process_state(state_fio, loading)) {
 238                         if(loading) {
 239                                 printf("Data loading Error: DEVID=%d\n", device->this_device_id);
 240                         }
 241                         return false;
 242                 }
 243         }
 244         // Machine specified.
 245 //      if(loading) {
 246 //              update_config();
 247 //      }
 248         return true;
 249 }