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 #include "../../fileio.h"
  28
  29 // ----------------------------------------------------------------------------
  30 // initialize
  31 // ----------------------------------------------------------------------------
  32
  33 VM::VM(EMU* parent_emu) : emu(parent_emu)
  34 {
  35         // create devices
  36         first_device = last_device = NULL;
  37         dummy = new DEVICE(this, emu);  // must be 1st device
  38         event = new EVENT(this, emu);   // must be 2nd device
  39
  40         beep = new BEEP(this, emu);
  41         drec = new DATAREC(this, emu);
  42         tf20 = new PTF20(this, emu);
  43         cpu = new Z80(this, emu);
  44
  45         io = new IO(this, emu);
  46         memory = new MEMORY(this, emu);
  47
  48         // set contexts
  49         event->set_context_cpu(cpu);
  50         event->set_context_sound(beep);
  51         event->set_context_sound(drec);
  52
  53         drec->set_context_out(io, SIG_IO_DREC, 1);
  54         tf20->set_context_sio(io, SIG_IO_ART);
  55
  56         io->set_context_cpu(cpu);
  57         io->set_context_mem(memory, memory->get_ram());
  58         io->set_context_tf20(tf20);
  59         io->set_context_beep(beep);
  60         io->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(io);
  66 #ifdef USE_DEBUGGER
  67         cpu->set_context_debugger(new DEBUGGER(this, emu));
  68 #endif
  69
  70         // initialize all devices
  71         for(DEVICE* device = first_device; device; device = device->next_device) {
  72                 device->initialize();
  73         }
  74 }
  75
  76 VM::~VM()
  77 {
  78         // delete all devices
  79         for(DEVICE* device = first_device; device;) {
  80                 DEVICE *next_device = device->next_device;
  81                 device->release();
  82                 delete device;
  83                 device = next_device;
  84         }
  85 }
  86
  87 DEVICE* VM::get_device(int id)
  88 {
  89         for(DEVICE* device = first_device; device; device = device->next_device) {
  90                 if(device->this_device_id == id) {
  91                         return device;
  92                 }
  93         }
  94         return NULL;
  95 }
  96
  97 // ----------------------------------------------------------------------------
  98 // drive virtual machine
  99 // ----------------------------------------------------------------------------
 100
 101 void VM::reset()
 102 {
 103         // reset all devices
 104         for(DEVICE* device = first_device; device; device = device->next_device) {
 105                 device->reset();
 106         }
 107 }
 108
 109 void VM::special_reset()
 110 {
 111         // system reset
 112         for(DEVICE* device = first_device; device; device = device->next_device) {
 113                 device->reset();
 114         }
 115         io->sysreset();
 116 }
 117
 118 void VM::run()
 119 {
 120         event->drive();
 121 }
 122
 123 // ----------------------------------------------------------------------------
 124 // debugger
 125 // ----------------------------------------------------------------------------
 126
 127 #ifdef USE_DEBUGGER
 128 DEVICE *VM::get_cpu(int index)
 129 {
 130         if(index == 0) {
 131                 return cpu;
 132         }
 133         return NULL;
 134 }
 135 #endif
 136
 137 // ----------------------------------------------------------------------------
 138 // draw screen
 139 // ----------------------------------------------------------------------------
 140
 141 void VM::draw_screen()
 142 {
 143         io->draw_screen();
 144 }
 145
 146 int VM::access_lamp()
 147 {
 148         uint32 status = tf20->read_signal(0);
 149         return (status & (1 | 4)) ? 1 : (status & (2 | 8)) ? 2 : 0;
 150 }
 151
 152 // ----------------------------------------------------------------------------
 153 // soud manager
 154 // ----------------------------------------------------------------------------
 155
 156 void VM::initialize_sound(int rate, int samples)
 157 {
 158         // init sound manager
 159         event->initialize_sound(rate, samples);
 160
 161         // init sound gen
 162         beep->init(rate, 1000, 8000);
 163 }
 164
 165 uint16* VM::create_sound(int* extra_frames)
 166 {
 167         return event->create_sound(extra_frames);
 168 }
 169
 170 int VM::sound_buffer_ptr()
 171 {
 172         return event->sound_buffer_ptr();
 173 }
 174
 175 // ----------------------------------------------------------------------------
 176 // notify key
 177 // ----------------------------------------------------------------------------
 178
 179 void VM::key_down(int code, bool repeat)
 180 {
 181         io->key_down(code);
 182 }
 183
 184 void VM::key_up(int code)
 185 {
 186         io->key_up(code);
 187 }
 188
 189 // ----------------------------------------------------------------------------
 190 // user interface
 191 // ----------------------------------------------------------------------------
 192
 193 void VM::open_disk(int drv, _TCHAR* file_path, int bank)
 194 {
 195         tf20->open_disk(drv, file_path, bank);
 196 }
 197
 198 void VM::close_disk(int drv)
 199 {
 200         tf20->close_disk(drv);
 201 }
 202
 203 bool VM::disk_inserted(int drv)
 204 {
 205         return tf20->disk_inserted(drv);
 206 }
 207
 208 void VM::play_tape(_TCHAR* file_path)
 209 {
 210         drec->play_tape(file_path);
 211 }
 212
 213 void VM::rec_tape(_TCHAR* file_path)
 214 {
 215         drec->rec_tape(file_path);
 216 }
 217
 218 void VM::close_tape()
 219 {
 220         drec->close_tape();
 221 }
 222
 223 bool VM::tape_inserted()
 224 {
 225         return drec->tape_inserted();
 226 }
 227
 228 bool VM::now_skip()
 229 {
 230         return event->now_skip();
 231 }
 232
 233 void VM::update_config()
 234 {
 235         for(DEVICE* device = first_device; device; device = device->next_device) {
 236                 device->update_config();
 237         }
 238 }
 239
 240 #define STATE_VERSION   1
 241
 242 void VM::save_state(FILEIO* state_fio)
 243 {
 244         state_fio->FputUint32(STATE_VERSION);
 245
 246         for(DEVICE* device = first_device; device; device = device->next_device) {
 247                 device->save_state(state_fio);
 248         }
 249 }
 250
 251 bool VM::load_state(FILEIO* state_fio)
 252 {
 253         if(state_fio->FgetUint32() != STATE_VERSION) {
 254                 return false;
 255         }
 256         for(DEVICE* device = first_device; device; device = device->next_device) {
 257                 if(!device->load_state(state_fio)) {
 258                         return false;
 259                 }
 260         }
 261         return true;
 262 }
 263