source/src/vm/phc20/phc20.cpp

   1 /*
   2         SANYO PHC-20 Emulator 'ePHC-20'
   3
   4         Author : Takeda.Toshiya
   5         Date   : 2010.09.03-
   6
   7         [ virtual machine ]
   8 */
   9
  10 #include "phc20.h"
  11 #include "../../emu.h"
  12 #include "../device.h"
  13 #include "../event.h"
  14
  15 #include "../datarec.h"
  16 #include "../mc6847.h"
  17 #include "../z80.h"
  18
  19 #ifdef USE_DEBUGGER
  20 #include "../debugger.h"
  21 #endif
  22
  23 #include "memory.h"
  24
  25 // ----------------------------------------------------------------------------
  26 // initialize
  27 // ----------------------------------------------------------------------------
  28
  29 VM::VM(EMU* parent_emu) : emu(parent_emu)
  30 {
  31         // create devices
  32         first_device = last_device = NULL;
  33         dummy = new DEVICE(this, emu);  // must be 1st device
  34         event = new EVENT(this, emu);   // must be 2nd device
  35
  36         drec = new DATAREC(this, emu);
  37         vdp = new MC6847(this, emu);
  38         cpu = new Z80(this, emu);
  39
  40         memory = new MEMORY(this, emu);
  41
  42         // set contexts
  43         event->set_context_cpu(cpu);
  44         event->set_context_sound(drec);
  45
  46         drec->set_context_ear(memory, SIG_MEMORY_SYSPORT, 1);
  47         vdp->set_context_vsync(memory, SIG_MEMORY_SYSPORT, 2);  // vsync / hsync?
  48
  49         vdp->load_font_image(create_local_path(_T("FONT.ROM")));
  50         vdp->set_vram_ptr(memory->get_vram(), 0x400);
  51         vdp->set_context_cpu(cpu);
  52         vdp->write_signal(SIG_MC6847_AG, 0, 0);         // force character mode
  53         vdp->write_signal(SIG_MC6847_AS, 0, 0);
  54         vdp->write_signal(SIG_MC6847_INTEXT, 0, 0);     // force internal character ???
  55         vdp->write_signal(SIG_MC6847_CSS, 0, 0);
  56
  57         memory->set_context_drec(drec);
  58
  59         // cpu bus
  60         cpu->set_context_mem(memory);
  61         cpu->set_context_io(dummy);
  62         cpu->set_context_intr(dummy);
  63 #ifdef USE_DEBUGGER
  64         cpu->set_context_debugger(new DEBUGGER(this, emu));
  65 #endif
  66
  67         // initialize all devices
  68         for(DEVICE* device = first_device; device; device = device->next_device) {
  69                 device->initialize();
  70         }
  71 }
  72
  73 VM::~VM()
  74 {
  75         // delete all devices
  76         for(DEVICE* device = first_device; device;) {
  77                 DEVICE *next_device = device->next_device;
  78                 device->release();
  79                 delete device;
  80                 device = next_device;
  81         }
  82 }
  83
  84 DEVICE* VM::get_device(int id)
  85 {
  86         for(DEVICE* device = first_device; device; device = device->next_device) {
  87                 if(device->this_device_id == id) {
  88                         return device;
  89                 }
  90         }
  91         return NULL;
  92 }
  93
  94 // ----------------------------------------------------------------------------
  95 // drive virtual machine
  96 // ----------------------------------------------------------------------------
  97
  98 void VM::reset()
  99 {
 100         // reset all devices
 101         for(DEVICE* device = first_device; device; device = device->next_device) {
 102                 device->reset();
 103         }
 104 }
 105
 106 void VM::run()
 107 {
 108         event->drive();
 109 }
 110
 111 // ----------------------------------------------------------------------------
 112 // debugger
 113 // ----------------------------------------------------------------------------
 114
 115 #ifdef USE_DEBUGGER
 116 DEVICE *VM::get_cpu(int index)
 117 {
 118         if(index == 0) {
 119                 return cpu;
 120         }
 121         return NULL;
 122 }
 123 #endif
 124
 125 // ----------------------------------------------------------------------------
 126 // draw screen
 127 // ----------------------------------------------------------------------------
 128
 129 void VM::draw_screen()
 130 {
 131         vdp->draw_screen();
 132 }
 133
 134 // ----------------------------------------------------------------------------
 135 // soud manager
 136 // ----------------------------------------------------------------------------
 137
 138 void VM::initialize_sound(int rate, int samples)
 139 {
 140         // init sound manager
 141         event->initialize_sound(rate, samples);
 142 }
 143
 144 uint16_t* VM::create_sound(int* extra_frames)
 145 {
 146         return event->create_sound(extra_frames);
 147 }
 148
 149 int VM::get_sound_buffer_ptr()
 150 {
 151         return event->get_sound_buffer_ptr();
 152 }
 153
 154 #ifdef USE_SOUND_VOLUME
 155 void VM::set_sound_device_volume(int ch, int decibel_l, int decibel_r)
 156 {
 157         if(ch == 0) {
 158                 drec->set_volume(0, decibel_l, decibel_r);
 159         }
 160 }
 161 #endif
 162
 163 // ----------------------------------------------------------------------------
 164 // user interface
 165 // ----------------------------------------------------------------------------
 166
 167 void VM::play_tape(const _TCHAR* file_path)
 168 {
 169         drec->play_tape(file_path);
 170         drec->write_signal(SIG_DATAREC_REMOTE, 1, 1);
 171 }
 172
 173 void VM::rec_tape(const _TCHAR* file_path)
 174 {
 175         drec->rec_tape(file_path);
 176         drec->write_signal(SIG_DATAREC_REMOTE, 1, 1);
 177 }
 178
 179 void VM::close_tape()
 180 {
 181         drec->close_tape();
 182         drec->write_signal(SIG_DATAREC_REMOTE, 0, 0);
 183 }
 184
 185 bool VM::is_tape_inserted()
 186 {
 187         return drec->is_tape_inserted();
 188 }
 189
 190 bool VM::is_tape_playing()
 191 {
 192         return drec->is_tape_playing();
 193 }
 194
 195 bool VM::is_tape_recording()
 196 {
 197         return drec->is_tape_recording();
 198 }
 199
 200 int VM::get_tape_position()
 201 {
 202         return drec->get_tape_position();
 203 }
 204
 205 bool VM::is_frame_skippable()
 206 {
 207         return event->is_frame_skippable();
 208 }
 209
 210 void VM::update_config()
 211 {
 212         for(DEVICE* device = first_device; device; device = device->next_device) {
 213                 device->update_config();
 214         }
 215 }
 216
 217 #define STATE_VERSION   1
 218
 219 void VM::save_state(FILEIO* state_fio)
 220 {
 221         state_fio->FputUint32(STATE_VERSION);
 222
 223         for(DEVICE* device = first_device; device; device = device->next_device) {
 224                 device->save_state(state_fio);
 225         }
 226 }
 227
 228 bool VM::load_state(FILEIO* state_fio)
 229 {
 230         if(state_fio->FgetUint32() != STATE_VERSION) {
 231                 return false;
 232         }
 233         for(DEVICE* device = first_device; device; device = device->next_device) {
 234                 if(!device->load_state(state_fio)) {
 235                         return false;
 236                 }
 237         }
 238         return true;
 239 }
 240