source/src/vm/rx78/rx78.cpp

   1 /*
   2         BANDAI RX-78 Emulator 'eRX-78'
   3
   4         Author : Takeda.Toshiya
   5         Date   : 2006.08.21 -
   6
   7         [ virtual machine ]
   8 */
   9
  10 #include "rx78.h"
  11 #include "../../emu.h"
  12 #include "../device.h"
  13 #include "../event.h"
  14
  15 #include "../datarec.h"
  16 #include "../io.h"
  17 #include "../sn76489an.h"
  18 #include "../z80.h"
  19
  20 #ifdef USE_DEBUGGER
  21 #include "../debugger.h"
  22 #endif
  23
  24 #include "cmt.h"
  25 #include "keyboard.h"
  26 #include "memory.h"
  27 #include "printer.h"
  28 #include "vdp.h"
  29
  30 // ----------------------------------------------------------------------------
  31 // initialize
  32 // ----------------------------------------------------------------------------
  33
  34 VM::VM(EMU* parent_emu) : emu(parent_emu)
  35 {
  36         // create devices
  37         first_device = last_device = NULL;
  38         dummy = new DEVICE(this, emu);  // must be 1st device
  39         event = new EVENT(this, emu);   // must be 2nd device
  40
  41         drec = new DATAREC(this, emu);
  42         io = new IO(this, emu);
  43         psg = new SN76489AN(this, emu);
  44         cpu = new Z80(this, emu);
  45
  46         cmt = new CMT(this, emu);
  47         key = new KEYBOARD(this, emu);
  48         memory = new MEMORY(this, emu);
  49         prt = new PRINTER(this, emu);
  50         vdp = new VDP(this, emu);
  51
  52         // set contexts
  53         event->set_context_cpu(cpu);
  54         event->set_context_sound(psg);
  55         event->set_context_sound(drec);
  56
  57         drec->set_context_ear(cmt, SIG_CMT_IN, 1);
  58         cmt->set_context_drec(drec);
  59         vdp->set_context_cpu(cpu);
  60         vdp->set_vram_ptr(memory->get_vram());
  61
  62         // cpu bus
  63         cpu->set_context_mem(memory);
  64         cpu->set_context_io(io);
  65         cpu->set_context_intr(dummy);
  66 #ifdef USE_DEBUGGER
  67         cpu->set_context_debugger(new DEBUGGER(this, emu));
  68 #endif
  69
  70         // i/o bus
  71         io->set_iomap_range_rw(0xe2, 0xe3, prt);
  72         io->set_iomap_single_rw(0xf0, cmt);
  73         io->set_iomap_range_w(0xf1, 0xf2, memory);
  74         io->set_iomap_single_rw(0xf4, key);
  75         io->set_iomap_range_w(0xf5, 0xfc, vdp);
  76         io->set_iomap_single_w(0xfe, vdp);
  77         io->set_iomap_single_w(0xff, psg);
  78
  79         // initialize all devices
  80         for(DEVICE* device = first_device; device; device = device->next_device) {
  81                 device->initialize();
  82         }
  83 }
  84
  85 VM::~VM()
  86 {
  87         // delete all devices
  88         for(DEVICE* device = first_device; device;) {
  89                 DEVICE *next_device = device->next_device;
  90                 device->release();
  91                 delete device;
  92                 device = next_device;
  93         }
  94 }
  95
  96 DEVICE* VM::get_device(int id)
  97 {
  98         for(DEVICE* device = first_device; device; device = device->next_device) {
  99                 if(device->this_device_id == id) {
 100                         return device;
 101                 }
 102         }
 103         return NULL;
 104 }
 105
 106 // ----------------------------------------------------------------------------
 107 // debugger
 108 // ----------------------------------------------------------------------------
 109
 110 #ifdef USE_DEBUGGER
 111 DEVICE *VM::get_cpu(int index)
 112 {
 113         if(index == 0) {
 114                 return cpu;
 115         }
 116         return NULL;
 117 }
 118 #endif
 119
 120 // ----------------------------------------------------------------------------
 121 // drive virtual machine
 122 // ----------------------------------------------------------------------------
 123
 124 void VM::reset()
 125 {
 126         // reset all devices
 127         for(DEVICE* device = first_device; device; device = device->next_device) {
 128                 device->reset();
 129         }
 130 }
 131
 132 void VM::run()
 133 {
 134         event->drive();
 135 }
 136
 137 // ----------------------------------------------------------------------------
 138 // draw screen
 139 // ----------------------------------------------------------------------------
 140
 141 void VM::draw_screen()
 142 {
 143         vdp->draw_screen();
 144 }
 145
 146 // ----------------------------------------------------------------------------
 147 // soud manager
 148 // ----------------------------------------------------------------------------
 149
 150 void VM::initialize_sound(int rate, int samples)
 151 {
 152         // init sound manager
 153         event->initialize_sound(rate, samples);
 154
 155         // init sound gen
 156         psg->init(rate, 3579545, 8000);
 157 }
 158
 159 uint16* VM::create_sound(int* extra_frames)
 160 {
 161         return event->create_sound(extra_frames);
 162 }
 163
 164 int VM::sound_buffer_ptr()
 165 {
 166         return event->sound_buffer_ptr();
 167 }
 168
 169 // ----------------------------------------------------------------------------
 170 // user interface
 171 // ----------------------------------------------------------------------------
 172
 173 void VM::open_cart(int drv, const _TCHAR* file_path)
 174 {
 175         if(drv == 0) {
 176                 memory->open_cart(file_path);
 177                 reset();
 178         }
 179 }
 180
 181 void VM::close_cart(int drv)
 182 {
 183         if(drv == 0) {
 184                 memory->close_cart();
 185                 reset();
 186         }
 187 }
 188
 189 bool VM::cart_inserted(int drv)
 190 {
 191         if(drv == 0) {
 192                 return memory->cart_inserted();
 193         } else {
 194                 return false;
 195         }
 196 }
 197
 198 void VM::play_tape(const _TCHAR* file_path)
 199 {
 200         drec->play_tape(file_path);
 201 }
 202
 203 void VM::rec_tape(const _TCHAR* file_path)
 204 {
 205         drec->rec_tape(file_path);
 206 }
 207
 208 void VM::close_tape()
 209 {
 210         drec->close_tape();
 211 }
 212
 213 bool VM::tape_inserted()
 214 {
 215         return drec->tape_inserted();
 216 }
 217
 218 bool VM::now_skip()
 219 {
 220         return event->now_skip();
 221 }
 222
 223 void VM::update_config()
 224 {
 225         for(DEVICE* device = first_device; device; device = device->next_device) {
 226                 device->update_config();
 227         }
 228 }
 229
 230 #define STATE_VERSION   1
 231
 232 void VM::save_state(FILEIO* state_fio)
 233 {
 234         state_fio->FputUint32(STATE_VERSION);
 235
 236         for(DEVICE* device = first_device; device; device = device->next_device) {
 237                 device->save_state(state_fio);
 238         }
 239 }
 240
 241 bool VM::load_state(FILEIO* state_fio)
 242 {
 243         if(state_fio->FgetUint32() != STATE_VERSION) {
 244                 return false;
 245         }
 246         for(DEVICE* device = first_device; device; device = device->next_device) {
 247                 if(!device->load_state(state_fio)) {
 248                         return false;
 249                 }
 250         }
 251         return true;
 252 }
 253