source/src/vm/pv1000/pv1000.cpp

   1 /*
   2         CASIO PV-1000 Emulator 'ePV-1000'
   3
   4         Author : Takeda.Toshiya
   5         Date   : 2006.11.16 -
   6
   7         [ virtual machine ]
   8 */
   9
  10 #include "pv1000.h"
  11 #include "../../emu.h"
  12 #include "../device.h"
  13 #include "../event.h"
  14
  15 #include "../io.h"
  16 #include "../memory.h"
  17 #include "../z80.h"
  18
  19 #ifdef USE_DEBUGGER
  20 #include "../debugger.h"
  21 #endif
  22
  23 #include "joystick.h"
  24 #include "psg.h"
  25 #include "vdp.h"
  26
  27 // ----------------------------------------------------------------------------
  28 // initialize
  29 // ----------------------------------------------------------------------------
  30
  31 VM::VM(EMU* parent_emu) : emu(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         memory = new MEMORY(this, emu);
  40         cpu = new Z80(this, emu);
  41
  42         joystick = new JOYSTICK(this, emu);
  43         psg = new PSG(this, emu);
  44         vdp = new VDP(this, emu);
  45
  46         // set contexts
  47         event->set_context_cpu(cpu);
  48         event->set_context_sound(psg);
  49
  50         vdp->set_context_cpu(cpu);
  51         vdp->set_memory_ptr(mem);
  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         // memory bus
  62         memset(mem, 0xff, 0x8000);
  63         memset(mem + 0x8000, 0, 0x8000);
  64
  65         memory->set_memory_r(0x0000, 0x7fff, mem);
  66         memory->set_memory_rw(0xb800, 0xbfff, mem + 0xb800);
  67
  68         // i/o bus
  69         io->set_iomap_range_w(0xf8, 0xfa, psg);
  70         io->set_iomap_range_rw(0xfc, 0xfd, joystick);
  71         io->set_iomap_range_w(0xfe, 0xff, vdp);
  72
  73         // initialize all devices
  74         for(DEVICE* device = first_device; device; device = device->next_device) {
  75                 device->initialize();
  76         }
  77         inserted = false;
  78 }
  79
  80 VM::~VM()
  81 {
  82         // delete all devices
  83         for(DEVICE* device = first_device; device;) {
  84                 DEVICE *next_device = device->next_device;
  85                 device->release();
  86                 delete device;
  87                 device = next_device;
  88         }
  89 }
  90
  91 DEVICE* VM::get_device(int id)
  92 {
  93         for(DEVICE* device = first_device; device; device = device->next_device) {
  94                 if(device->this_device_id == id) {
  95                         return device;
  96                 }
  97         }
  98         return NULL;
  99 }
 100
 101 // ----------------------------------------------------------------------------
 102 // drive virtual machine
 103 // ----------------------------------------------------------------------------
 104
 105 void VM::reset()
 106 {
 107         // reset all devices
 108         for(DEVICE* device = first_device; device; device = device->next_device) {
 109                 device->reset();
 110         }
 111 }
 112
 113 void VM::run()
 114 {
 115         event->drive();
 116 }
 117
 118 // ----------------------------------------------------------------------------
 119 // debugger
 120 // ----------------------------------------------------------------------------
 121
 122 #ifdef USE_DEBUGGER
 123 DEVICE *VM::get_cpu(int index)
 124 {
 125         if(index == 0) {
 126                 return cpu;
 127         }
 128         return NULL;
 129 }
 130 #endif
 131
 132 // ----------------------------------------------------------------------------
 133 // draw screen
 134 // ----------------------------------------------------------------------------
 135
 136 void VM::draw_screen()
 137 {
 138         vdp->draw_screen();
 139 }
 140
 141 // ----------------------------------------------------------------------------
 142 // soud manager
 143 // ----------------------------------------------------------------------------
 144
 145 void VM::initialize_sound(int rate, int samples)
 146 {
 147         // init sound manager
 148         event->initialize_sound(rate, samples);
 149
 150         // init sound gen
 151         psg->init(rate);
 152 }
 153
 154 uint16* VM::create_sound(int* extra_frames)
 155 {
 156         return event->create_sound(extra_frames);
 157 }
 158
 159 int VM::sound_buffer_ptr()
 160 {
 161         return event->sound_buffer_ptr();
 162 }
 163
 164 #ifdef USE_SOUND_VOLUME
 165 void VM::set_sound_device_volume(int ch, int decibel_l, int decibel_r)
 166 {
 167         if(ch == 0) {
 168                 psg->set_volume(0, decibel_l, decibel_r);
 169         }
 170 }
 171 #endif
 172
 173 // ----------------------------------------------------------------------------
 174 // user interface
 175 // ----------------------------------------------------------------------------
 176
 177 void VM::open_cart(int drv, const _TCHAR* file_path)
 178 {
 179         if(drv == 0) {
 180                 memset(mem, 0xff, 0x8000);
 181                 inserted = memory->read_image(file_path, mem, 0x8000);
 182                 reset();
 183         }
 184 }
 185
 186 void VM::close_cart(int drv)
 187 {
 188         if(drv == 0) {
 189                 memset(mem, 0xff, 0x8000);
 190                 inserted = false;
 191                 reset();
 192         }
 193 }
 194
 195 bool VM::cart_inserted(int drv)
 196 {
 197         if(drv == 0) {
 198                 return inserted;
 199         } else {
 200                 return false;
 201         }
 202 }
 203
 204 bool VM::now_skip()
 205 {
 206         return event->now_skip();
 207 }
 208
 209 void VM::update_config()
 210 {
 211         for(DEVICE* device = first_device; device; device = device->next_device) {
 212                 device->update_config();
 213         }
 214 }
 215
 216 #define STATE_VERSION   1
 217
 218 void VM::save_state(FILEIO* state_fio)
 219 {
 220         state_fio->FputUint32(STATE_VERSION);
 221
 222         for(DEVICE* device = first_device; device; device = device->next_device) {
 223                 device->save_state(state_fio);
 224         }
 225         state_fio->Fwrite(mem, sizeof(mem), 1);
 226         state_fio->FputBool(inserted);
 227 }
 228
 229 bool VM::load_state(FILEIO* state_fio)
 230 {
 231         if(state_fio->FgetUint32() != STATE_VERSION) {
 232                 return false;
 233         }
 234         for(DEVICE* device = first_device; device; device = device->next_device) {
 235                 if(!device->load_state(state_fio)) {
 236                         return false;
 237                 }
 238         }
 239         state_fio->Fread(mem, sizeof(mem), 1);
 240         inserted = state_fio->FgetBool();
 241         return true;
 242 }
 243