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 using COLECOVISION::KEYBOARD;
  28 using COLECOVISION::MEMORY;
  29 // ----------------------------------------------------------------------------
  30 // initialize
  31 // ----------------------------------------------------------------------------
  32
  33 VM::VM(EMU* parent_emu) : VM_TEMPLATE(parent_emu)
  34 {
  35         // create devices
  36         first_device = last_device = NULL;
  37         dummy = new DEVICE(this, emu);  // must be 1st device
  38         event = new EVENT(this, emu);   // must be 2nd device
  39
  40         io = new IO(this, emu);
  41         psg = new SN76489AN(this, emu);
  42         vdp = new TMS9918A(this, emu);
  43         cpu = new Z80(this, emu);
  44
  45         key = new KEYBOARD(this, emu);
  46         memory = new MEMORY(this, emu);
  47
  48         // set contexts
  49         event->set_context_cpu(cpu);
  50         event->set_context_sound(psg);
  51
  52         vdp->set_context_irq(cpu, SIG_CPU_NMI, 1);
  53         key->set_context_cpu(cpu);
  54
  55         // cpu bus
  56         cpu->set_context_mem(memory);
  57         cpu->set_context_io(io);
  58         cpu->set_context_intr(dummy);
  59 #ifdef USE_DEBUGGER
  60         cpu->set_context_debugger(new DEBUGGER(this, emu));
  61 #endif
  62
  63         // i/o bus
  64         io->set_iomap_range_w(0x80, 0x9f, key);
  65         io->set_iomap_range_rw(0xbe, 0xbf, vdp);
  66         io->set_iomap_range_w(0xc0, 0xdf, key);
  67         io->set_iomap_range_r(0xfc, 0xff, key);
  68         io->set_iomap_range_w(0xff, 0xff, psg);
  69
  70         // initialize all devices
  71 #if defined(__GIT_REPO_VERSION)
  72         strncpy(_git_revision, __GIT_REPO_VERSION, sizeof(_git_revision) - 1);
  73 #endif
  74         for(DEVICE* device = first_device; device; device = device->next_device) {
  75                 device->initialize();
  76         }
  77 }
  78
  79 VM::~VM()
  80 {
  81         // delete all devices
  82         for(DEVICE* device = first_device; device;) {
  83                 DEVICE *next_device = device->next_device;
  84                 device->release();
  85                 delete device;
  86                 device = next_device;
  87         }
  88 }
  89
  90 DEVICE* VM::get_device(int id)
  91 {
  92         for(DEVICE* device = first_device; device; device = device->next_device) {
  93                 if(device->this_device_id == id) {
  94                         return device;
  95                 }
  96         }
  97         return NULL;
  98 }
  99
 100 // ----------------------------------------------------------------------------
 101 // debugger
 102 // ----------------------------------------------------------------------------
 103
 104 #ifdef USE_DEBUGGER
 105 DEVICE *VM::get_cpu(int index)
 106 {
 107         if(index == 0) {
 108                 return cpu;
 109         }
 110         return NULL;
 111 }
 112 #endif
 113
 114 // ----------------------------------------------------------------------------
 115 // drive virtual machine
 116 // ----------------------------------------------------------------------------
 117
 118 void VM::reset()
 119 {
 120         // reset all devices
 121         for(DEVICE* device = first_device; device; device = device->next_device) {
 122                 device->reset();
 123         }
 124 }
 125
 126 void VM::run()
 127 {
 128         event->drive();
 129 }
 130
 131 // ----------------------------------------------------------------------------
 132 // draw screen
 133 // ----------------------------------------------------------------------------
 134
 135 void VM::draw_screen()
 136 {
 137         vdp->draw_screen();
 138 }
 139
 140 // ----------------------------------------------------------------------------
 141 // soud manager
 142 // ----------------------------------------------------------------------------
 143
 144 void VM::initialize_sound(int rate, int samples)
 145 {
 146         // init sound manager
 147         event->initialize_sound(rate, samples);
 148
 149         // init sound gen
 150         psg->initialize_sound(rate, 3579545, 8000);
 151 }
 152
 153 uint16_t* VM::create_sound(int* extra_frames)
 154 {
 155         return event->create_sound(extra_frames);
 156 }
 157
 158 int VM::get_sound_buffer_ptr()
 159 {
 160         return event->get_sound_buffer_ptr();
 161 }
 162
 163 #ifdef USE_SOUND_VOLUME
 164 void VM::set_sound_device_volume(int ch, int decibel_l, int decibel_r)
 165 {
 166         if(ch == 0) {
 167                 psg->set_volume(0, decibel_l, decibel_r);
 168         }
 169 }
 170 #endif
 171
 172 // ----------------------------------------------------------------------------
 173 // user interface
 174 // ----------------------------------------------------------------------------
 175
 176 void VM::open_cart(int drv, const _TCHAR* file_path)
 177 {
 178         if(drv == 0) {
 179                 memory->open_cart(file_path);
 180                 reset();
 181         }
 182 }
 183
 184 void VM::close_cart(int drv)
 185 {
 186         if(drv == 0) {
 187                 memory->close_cart();
 188                 reset();
 189         }
 190 }
 191
 192 bool VM::is_cart_inserted(int drv)
 193 {
 194         if(drv == 0) {
 195                 return memory->is_cart_inserted();
 196         } else {
 197                 return false;
 198         }
 199 }
 200
 201 bool VM::is_frame_skippable()
 202 {
 203         return event->is_frame_skippable();
 204 }
 205
 206 void VM::update_config()
 207 {
 208         for(DEVICE* device = first_device; device; device = device->next_device) {
 209                 device->update_config();
 210         }
 211 }
 212
 213 #define STATE_VERSION   2
 214
 215 bool VM::process_state(FILEIO* state_fio, bool loading)
 216 {
 217         if(!state_fio->StateCheckUint32(STATE_VERSION)) {
 218                 return false;
 219         }
 220         for(DEVICE* device = first_device; device; device = device->next_device) {
 221                 // Note: typeid(foo).name is fixed by recent ABI.Not dec 6.
 222                 // const char *name = typeid(*device).name();
 223                 //       But, using get_device_name() instead of typeid(foo).name() 20181008 K.O
 224                 const char *name = device->get_device_name();
 225                 int len = strlen(name);
 226
 227                 if(!state_fio->StateCheckInt32(len)) {
 228                         if(loading) {
 229                                 printf("Class name len Error: DEVID=%d EXPECT=%s\n", device->this_device_id, name);
 230                         }
 231                         return false;
 232                 }
 233                 if(!state_fio->StateCheckBuffer(name, len, 1)) {
 234                         if(loading) {
 235                                 printf("Class name Error: DEVID=%d EXPECT=%s\n", device->this_device_id, name);
 236                         }
 237                         return false;
 238                 }
 239                 if(!device->process_state(state_fio, loading)) {
 240                         if(loading) {
 241                                 printf("Data loading Error: DEVID=%d\n", device->this_device_id);
 242                         }
 243                         return false;
 244                 }
 245         }
 246         // Machine specified.
 247 //      if(loading) {
 248 //              update_config();
 249 //      }
 250         return true;
 251 }