source/src/vm/hc40/hc40.cpp

   1 /*
   2         EPSON HC-40 Emulator 'eHC-40'
   3
   4         Author : Takeda.Toshiya
   5         Date   : 2008.02.23 -
   6
   7         [ virtual machine ]
   8 */
   9
  10 #include "hc40.h"
  11 #include "../../emu.h"
  12 #include "../device.h"
  13 #include "../event.h"
  14
  15 #include "../beep.h"
  16 #include "../datarec.h"
  17 #include "../ptf20.h"
  18 #include "../z80.h"
  19
  20 #ifdef USE_DEBUGGER
  21 #include "../debugger.h"
  22 #endif
  23
  24 #include "io.h"
  25 #include "memory.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         beep = new BEEP(this, emu);
  39         drec = new DATAREC(this, emu);
  40         tf20 = new PTF20(this, emu);
  41         cpu = new Z80(this, emu);
  42
  43         io = new IO(this, emu);
  44         memory = new MEMORY(this, emu);
  45
  46         // set contexts
  47         event->set_context_cpu(cpu);
  48         event->set_context_sound(beep);
  49         event->set_context_sound(drec);
  50
  51         drec->set_context_out(io, SIG_IO_DREC, 1);
  52         tf20->set_context_sio(io, SIG_IO_ART);
  53
  54         io->set_context_cpu(cpu);
  55         io->set_context_mem(memory, memory->get_ram());
  56         io->set_context_tf20(tf20);
  57         io->set_context_beep(beep);
  58         io->set_context_drec(drec);
  59
  60         // cpu bus
  61         cpu->set_context_mem(memory);
  62         cpu->set_context_io(io);
  63         cpu->set_context_intr(io);
  64 #ifdef USE_DEBUGGER
  65         cpu->set_context_debugger(new DEBUGGER(this, emu));
  66 #endif
  67
  68         // initialize all devices
  69         for(DEVICE* device = first_device; device; device = device->next_device) {
  70                 device->initialize();
  71         }
  72 }
  73
  74 VM::~VM()
  75 {
  76         // delete all devices
  77         for(DEVICE* device = first_device; device;) {
  78                 DEVICE *next_device = device->next_device;
  79                 device->release();
  80                 delete device;
  81                 device = next_device;
  82         }
  83 }
  84
  85 DEVICE* VM::get_device(int id)
  86 {
  87         for(DEVICE* device = first_device; device; device = device->next_device) {
  88                 if(device->this_device_id == id) {
  89                         return device;
  90                 }
  91         }
  92         return NULL;
  93 }
  94
  95 // ----------------------------------------------------------------------------
  96 // drive virtual machine
  97 // ----------------------------------------------------------------------------
  98
  99 void VM::reset()
 100 {
 101         // reset all devices
 102         for(DEVICE* device = first_device; device; device = device->next_device) {
 103                 device->reset();
 104         }
 105 }
 106
 107 void VM::special_reset()
 108 {
 109         // system reset
 110         for(DEVICE* device = first_device; device; device = device->next_device) {
 111                 device->reset();
 112         }
 113         io->sysreset();
 114 }
 115
 116 void VM::run()
 117 {
 118         event->drive();
 119 }
 120
 121 // ----------------------------------------------------------------------------
 122 // debugger
 123 // ----------------------------------------------------------------------------
 124
 125 #ifdef USE_DEBUGGER
 126 DEVICE *VM::get_cpu(int index)
 127 {
 128         if(index == 0) {
 129                 return cpu;
 130         }
 131         return NULL;
 132 }
 133 #endif
 134
 135 // ----------------------------------------------------------------------------
 136 // draw screen
 137 // ----------------------------------------------------------------------------
 138
 139 void VM::draw_screen()
 140 {
 141         io->draw_screen();
 142 }
 143
 144 int VM::access_lamp()
 145 {
 146         uint32 status = tf20->read_signal(0);
 147         return (status & (1 | 4)) ? 1 : (status & (2 | 8)) ? 2 : 0;
 148 }
 149
 150 // ----------------------------------------------------------------------------
 151 // soud manager
 152 // ----------------------------------------------------------------------------
 153
 154 void VM::initialize_sound(int rate, int samples)
 155 {
 156         // init sound manager
 157         event->initialize_sound(rate, samples);
 158
 159         // init sound gen
 160         beep->init(rate, 1000, 8000);
 161 }
 162
 163 uint16* VM::create_sound(int* extra_frames)
 164 {
 165         return event->create_sound(extra_frames);
 166 }
 167
 168 int VM::sound_buffer_ptr()
 169 {
 170         return event->sound_buffer_ptr();
 171 }
 172
 173 // ----------------------------------------------------------------------------
 174 // notify key
 175 // ----------------------------------------------------------------------------
 176
 177 void VM::key_down(int code, bool repeat)
 178 {
 179         io->key_down(code);
 180 }
 181
 182 void VM::key_up(int code)
 183 {
 184         io->key_up(code);
 185 }
 186
 187 // ----------------------------------------------------------------------------
 188 // user interface
 189 // ----------------------------------------------------------------------------
 190
 191 void VM::open_disk(int drv, const _TCHAR* file_path, int bank)
 192 {
 193         tf20->open_disk(drv, file_path, bank);
 194 }
 195
 196 void VM::close_disk(int drv)
 197 {
 198         tf20->close_disk(drv);
 199 }
 200
 201 bool VM::disk_inserted(int drv)
 202 {
 203         return tf20->disk_inserted(drv);
 204 }
 205
 206 void VM::set_disk_protected(int drv, bool value)
 207 {
 208         tf20->set_disk_protected(drv, value);
 209 }
 210
 211 bool VM::get_disk_protected(int drv)
 212 {
 213         return tf20->get_disk_protected(drv);
 214 }
 215
 216 void VM::play_tape(const _TCHAR* file_path)
 217 {
 218         drec->play_tape(file_path);
 219 }
 220
 221 void VM::rec_tape(const _TCHAR* file_path)
 222 {
 223         drec->rec_tape(file_path);
 224 }
 225
 226 void VM::close_tape()
 227 {
 228         drec->close_tape();
 229 }
 230
 231 bool VM::tape_inserted()
 232 {
 233         return drec->tape_inserted();
 234 }
 235
 236 bool VM::now_skip()
 237 {
 238         return event->now_skip();
 239 }
 240
 241 void VM::update_config()
 242 {
 243         for(DEVICE* device = first_device; device; device = device->next_device) {
 244                 device->update_config();
 245         }
 246 }
 247
 248 #define STATE_VERSION   1
 249
 250 void VM::save_state(FILEIO* state_fio)
 251 {
 252         state_fio->FputUint32(STATE_VERSION);
 253
 254         for(DEVICE* device = first_device; device; device = device->next_device) {
 255                 device->save_state(state_fio);
 256         }
 257 }
 258
 259 bool VM::load_state(FILEIO* state_fio)
 260 {
 261         if(state_fio->FgetUint32() != STATE_VERSION) {
 262                 return false;
 263         }
 264         for(DEVICE* device = first_device; device; device = device->next_device) {
 265                 if(!device->load_state(state_fio)) {
 266                         return false;
 267                 }
 268         }
 269         return true;
 270 }
 271