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