source/src/vm/m5/m5.cpp

   1 /*
   2         SORD m5 Emulator 'Emu5'
   3
   4         Author : Takeda.Toshiya
   5         Date   : 2006.08.18 -
   6
   7         [ virtual machine ]
   8 */
   9
  10 #include "m5.h"
  11 #include "../../emu.h"
  12 #include "../device.h"
  13 #include "../event.h"
  14
  15 #include "../datarec.h"
  16 #include "../io.h"
  17 #include "../memory.h"
  18 #include "../sn76489an.h"
  19 #include "../tms9918a.h"
  20 #include "../z80.h"
  21 #include "../z80ctc.h"
  22
  23 #ifdef USE_DEBUGGER
  24 #include "../debugger.h"
  25 #endif
  26
  27 #include "cmt.h"
  28 #include "keyboard.h"
  29
  30 #include "../../fileio.h"
  31
  32 // ----------------------------------------------------------------------------
  33 // initialize
  34 // ----------------------------------------------------------------------------
  35
  36 VM::VM(EMU* parent_emu) : emu(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
  43         drec = new DATAREC(this, emu);
  44         io = new IO(this, emu);
  45         memory = new MEMORY(this, emu);
  46         psg = new SN76489AN(this, emu);
  47         vdp = new TMS9918A(this, emu);
  48         cpu = new Z80(this, emu);
  49         ctc = new Z80CTC(this, emu);
  50
  51         cmt = new CMT(this, emu);
  52         key = new KEYBOARD(this, emu);
  53
  54         // set contexts
  55         event->set_context_cpu(cpu);
  56         event->set_context_sound(psg);
  57
  58         drec->set_context_out(cmt, SIG_CMT_IN, 1);
  59         drec->set_context_end(cmt, SIG_CMT_EOT, 1);
  60         vdp->set_context_irq(ctc, SIG_Z80CTC_TRIG_3, 1);
  61         cmt->set_context_drec(drec);
  62
  63         // cpu bus
  64         cpu->set_context_mem(memory);
  65         cpu->set_context_io(io);
  66         cpu->set_context_intr(ctc);
  67 #ifdef USE_DEBUGGER
  68         cpu->set_context_debugger(new DEBUGGER(this, emu));
  69 #endif
  70
  71         // z80 family daisy chain
  72         ctc->set_context_intr(cpu, 0);
  73
  74         // memory bus
  75         memset(ram, 0, sizeof(ram));
  76         memset(ext, 0, sizeof(ext));
  77         memset(ipl, 0xff, sizeof(ipl));
  78         memset(cart, 0xff, sizeof(cart));
  79
  80         memory->read_bios(_T("IPL.ROM"), ipl, sizeof(ipl));
  81
  82         memory->set_memory_r(0x0000, 0x1fff, ipl);
  83         memory->set_memory_r(0x2000, 0x6fff, cart);
  84         memory->set_memory_rw(0x7000, 0x7fff, ram);
  85         memory->set_memory_rw(0x8000, 0xffff, ext);
  86
  87         // i/o bus
  88         io->set_iomap_range_rw(0x00, 0x03, ctc);
  89         io->set_iomap_range_rw(0x10, 0x11, vdp);
  90         io->set_iomap_single_w(0x20, psg);
  91         io->set_iomap_range_r(0x30, 0x37, key);
  92         io->set_iomap_single_w(0x40, cmt);
  93         io->set_iomap_single_rw(0x50, cmt);
  94
  95         // FD5 floppy drive uint
  96         subcpu = NULL;
  97 #ifdef USE_DEBUGGER
  98 //      subcpu->set_context_debugger(new DEBUGGER(this, emu));
  99 #endif
 100
 101         // initialize all devices
 102         for(DEVICE* device = first_device; device; device = device->next_device) {
 103                 device->initialize();
 104         }
 105         inserted = false;
 106 }
 107
 108 VM::~VM()
 109 {
 110         // delete all devices
 111         for(DEVICE* device = first_device; device;) {
 112                 DEVICE *next_device = device->next_device;
 113                 device->release();
 114                 delete device;
 115                 device = next_device;
 116         }
 117 }
 118
 119 DEVICE* VM::get_device(int id)
 120 {
 121         for(DEVICE* device = first_device; device; device = device->next_device) {
 122                 if(device->this_device_id == id) {
 123                         return device;
 124                 }
 125         }
 126         return NULL;
 127 }
 128
 129 // ----------------------------------------------------------------------------
 130 // drive virtual machine
 131 // ----------------------------------------------------------------------------
 132
 133 void VM::reset()
 134 {
 135         // reset all devices
 136         for(DEVICE* device = first_device; device; device = device->next_device) {
 137                 device->reset();
 138         }
 139 }
 140
 141 void VM::run()
 142 {
 143         event->drive();
 144 }
 145
 146 // ----------------------------------------------------------------------------
 147 // debugger
 148 // ----------------------------------------------------------------------------
 149
 150 #ifdef USE_DEBUGGER
 151 DEVICE *VM::get_cpu(int index)
 152 {
 153         if(index == 0) {
 154                 return cpu;
 155         } else if(index == 1) {
 156                 return subcpu;
 157         }
 158         return NULL;
 159 }
 160 #endif
 161
 162 // ----------------------------------------------------------------------------
 163 // draw screen
 164 // ----------------------------------------------------------------------------
 165
 166 void VM::draw_screen()
 167 {
 168         vdp->draw_screen();
 169 }
 170
 171 // ----------------------------------------------------------------------------
 172 // soud manager
 173 // ----------------------------------------------------------------------------
 174
 175 void VM::initialize_sound(int rate, int samples)
 176 {
 177         // init sound manager
 178         event->initialize_sound(rate, samples);
 179
 180         // init sound gen
 181         psg->init(rate, 3579545, 8000);
 182 }
 183
 184 uint16* VM::create_sound(int* extra_frames)
 185 {
 186         return event->create_sound(extra_frames);
 187 }
 188
 189 int VM::sound_buffer_ptr()
 190 {
 191         return event->sound_buffer_ptr();
 192 }
 193
 194 // ----------------------------------------------------------------------------
 195 // user interface
 196 // ----------------------------------------------------------------------------
 197
 198 void VM::open_cart(int drv, _TCHAR* file_path)
 199 {
 200         if(drv == 0) {
 201                 memset(cart, 0xff, sizeof(cart));
 202                 inserted = memory->read_image(file_path, cart, sizeof(cart));
 203                 reset();
 204         }
 205 }
 206
 207 void VM::close_cart(int drv)
 208 {
 209         if(drv == 0) {
 210                 memset(cart, 0xff, sizeof(cart));
 211                 inserted = false;
 212                 reset();
 213         }
 214 }
 215
 216 bool VM::cart_inserted(int drv)
 217 {
 218         if(drv == 0) {
 219                 return inserted;
 220         } else {
 221                 return false;
 222         }
 223 }
 224
 225 void VM::play_tape(_TCHAR* file_path)
 226 {
 227         drec->play_tape(file_path);
 228 }
 229
 230 void VM::rec_tape(_TCHAR* file_path)
 231 {
 232         drec->rec_tape(file_path);
 233 }
 234
 235 void VM::close_tape()
 236 {
 237         drec->close_tape();
 238 }
 239
 240 bool VM::tape_inserted()
 241 {
 242         return drec->tape_inserted();
 243 }
 244
 245 bool VM::now_skip()
 246 {
 247         return event->now_skip();
 248 }
 249
 250 void VM::update_config()
 251 {
 252         for(DEVICE* device = first_device; device; device = device->next_device) {
 253                 device->update_config();
 254         }
 255 }
 256
 257 #define STATE_VERSION   1
 258
 259 void VM::save_state(FILEIO* state_fio)
 260 {
 261         state_fio->FputUint32(STATE_VERSION);
 262
 263         for(DEVICE* device = first_device; device; device = device->next_device) {
 264                 device->save_state(state_fio);
 265         }
 266         state_fio->Fwrite(ram, sizeof(ram), 1);
 267         state_fio->Fwrite(ext, sizeof(ext), 1);
 268         state_fio->FputBool(inserted);
 269 }
 270
 271 bool VM::load_state(FILEIO* state_fio)
 272 {
 273         if(state_fio->FgetUint32() != STATE_VERSION) {
 274                 return false;
 275         }
 276         for(DEVICE* device = first_device; device; device = device->next_device) {
 277                 if(!device->load_state(state_fio)) {
 278                         return false;
 279                 }
 280         }
 281         state_fio->Fread(ram, sizeof(ram), 1);
 282         state_fio->Fread(ext, sizeof(ext), 1);
 283         inserted = state_fio->FgetBool();
 284         return true;
 285 }
 286