source/src/vm/jr800/jr800.cpp

   1 /*
   2         National JR-800 Emulator 'eJR-800'
   3
   4         Author : Takeda.Toshiya
   5         Date   : 2017.03.13-
   6
   7         [ virtual machine ]
   8 */
   9
  10 #include "jr800.h"
  11 #include "../../emu.h"
  12 #include "../device.h"
  13 #include "../event.h"
  14
  15 #include "../datarec.h"
  16 #include "../hd44102.h"
  17 #include "../mc6800.h"
  18 #include "../memory.h"
  19 #include "../noise.h"
  20 #include "../pcm1bit.h"
  21
  22 #ifdef USE_DEBUGGER
  23 #include "../debugger.h"
  24 #endif
  25
  26 #include "io.h"
  27
  28 // ----------------------------------------------------------------------------
  29 // initialize
  30 // ----------------------------------------------------------------------------
  31
  32 VM::VM(EMU* parent_emu) : emu(parent_emu)
  33 {
  34         // create devices
  35         first_device = last_device = NULL;
  36         dummy = new DEVICE(this, emu);  // must be 1st device
  37         event = new EVENT(this, emu);   // must be 2nd device
  38
  39         drec = new DATAREC(this, emu);
  40         drec->set_context_noise_play(new NOISE(this, emu));
  41         drec->set_context_noise_stop(new NOISE(this, emu));
  42         drec->set_context_noise_fast(new NOISE(this, emu));
  43         for(int i = 0; i < 8; i++) {
  44                 lcd[i] = new HD44102(this, emu);
  45         }
  46         cpu = new MC6800(this, emu);
  47         memory = new MEMORY(this, emu);
  48         pcm = new PCM1BIT(this, emu);
  49
  50         io = new IO(this, emu);
  51
  52         // set contexts
  53         event->set_context_cpu(cpu);
  54         event->set_context_sound(drec);
  55         event->set_context_sound(pcm);
  56         event->set_context_sound(drec->get_context_noise_play());
  57         event->set_context_sound(drec->get_context_noise_stop());
  58         event->set_context_sound(drec->get_context_noise_fast());
  59
  60 //      cpu->set_context_port1(drec, SIG_DATAREC_MIC, 0x01, 0);
  61         cpu->set_context_port1(pcm, SIG_PCM1BIT_ON, 0x08, 0);
  62         cpu->set_context_port1(pcm, SIG_PCM1BIT_SIGNAL, 0x10, 0);
  63
  64         for(int i = 0; i < 8; i++) {
  65                 io->set_context_lcd(i, lcd[i]);
  66         }
  67
  68         // cpu bus
  69         cpu->set_context_mem(memory);
  70 #ifdef USE_DEBUGGER
  71         cpu->set_context_debugger(new DEBUGGER(this, emu));
  72 #endif
  73
  74         // memory bus
  75         memset(ram, 0x00, sizeof(ram));
  76         memset(rom, 0xff, sizeof(rom));
  77
  78         memory->read_bios(_T("BASIC.ROM"), rom, sizeof(rom));
  79
  80         memory->set_memory_rw(0x2000, 0x7fff, ram);
  81         memory->set_memory_r(0x8000, 0xffff, rom);
  82         memory->set_memory_mapped_io_rw(0x0a00, 0x0bff, io);
  83         memory->set_memory_mapped_io_rw(0x0d00, 0x0fff, io);
  84
  85         // initialize all devices
  86         for(DEVICE* device = first_device; device; device = device->next_device) {
  87                 device->initialize();
  88         }
  89 }
  90
  91 VM::~VM()
  92 {
  93         // delete all devices
  94         for(DEVICE* device = first_device; device;) {
  95                 DEVICE *next_device = device->next_device;
  96                 device->release();
  97                 delete device;
  98                 device = next_device;
  99         }
 100 }
 101
 102 DEVICE* VM::get_device(int id)
 103 {
 104         for(DEVICE* device = first_device; device; device = device->next_device) {
 105                 if(device->this_device_id == id) {
 106                         return device;
 107                 }
 108         }
 109         return NULL;
 110 }
 111
 112 // ----------------------------------------------------------------------------
 113 // drive virtual machine
 114 // ----------------------------------------------------------------------------
 115
 116 void VM::reset()
 117 {
 118         // reset all devices
 119         for(DEVICE* device = first_device; device; device = device->next_device) {
 120                 device->reset();
 121         }
 122         cpu->write_signal(SIG_MC6801_PORT_1, 0x00, 0xff);
 123         cpu->write_signal(SIG_MC6801_PORT_2, 0x00, 0xff);
 124         cpu->write_signal(SIG_MC6801_PORT_3, 0x00, 0xff);
 125         cpu->write_signal(SIG_MC6801_PORT_4, 0x00, 0xff);
 126 }
 127
 128 void VM::run()
 129 {
 130         event->drive();
 131 }
 132
 133 // ----------------------------------------------------------------------------
 134 // debugger
 135 // ----------------------------------------------------------------------------
 136
 137 #ifdef USE_DEBUGGER
 138 DEVICE *VM::get_cpu(int index)
 139 {
 140         if(index == 0) {
 141                 return cpu;
 142         }
 143         return NULL;
 144 }
 145 #endif
 146
 147 // ----------------------------------------------------------------------------
 148 // draw screen
 149 // ----------------------------------------------------------------------------
 150
 151 void VM::draw_screen()
 152 {
 153         for(int y = 0; y < 2; y++) {
 154                 for(int x = 0; x < 4; x++) {
 155                         lcd[x + 4 * y]->screen_update(50 * x - 4, 32 * y, y == 0);
 156                 }
 157         }
 158 }
 159
 160 // ----------------------------------------------------------------------------
 161 // soud manager
 162 // ----------------------------------------------------------------------------
 163
 164 void VM::initialize_sound(int rate, int samples)
 165 {
 166         // init sound manager
 167         event->initialize_sound(rate, samples);
 168
 169         // init sound gen
 170         pcm->initialize_sound(rate, 8000);
 171 }
 172
 173 uint16_t* VM::create_sound(int* extra_frames)
 174 {
 175         return event->create_sound(extra_frames);
 176 }
 177
 178 int VM::get_sound_buffer_ptr()
 179 {
 180         return event->get_sound_buffer_ptr();
 181 }
 182
 183 #ifdef USE_SOUND_VOLUME
 184 void VM::set_sound_device_volume(int ch, int decibel_l, int decibel_r)
 185 {
 186         if(ch == 0) {
 187                 pcm->set_volume(0, decibel_l, decibel_r);
 188         } if(ch == 1) {
 189                 drec->set_volume(0, decibel_l, decibel_r);
 190         } else if(ch == 2) {
 191                 drec->get_context_noise_play()->set_volume(0, decibel_l, decibel_r);
 192                 drec->get_context_noise_stop()->set_volume(0, decibel_l, decibel_r);
 193                 drec->get_context_noise_fast()->set_volume(0, decibel_l, decibel_r);
 194         }
 195 }
 196 #endif
 197
 198 // ----------------------------------------------------------------------------
 199 // user interface
 200 // ----------------------------------------------------------------------------
 201
 202 void VM::play_tape(int drv, const _TCHAR* file_path)
 203 {
 204         drec->play_tape(file_path);
 205 }
 206
 207 void VM::rec_tape(int drv, const _TCHAR* file_path)
 208 {
 209         drec->rec_tape(file_path);
 210 }
 211
 212 void VM::close_tape(int drv)
 213 {
 214         emu->lock_vm();
 215         drec->close_tape();
 216         emu->unlock_vm();
 217 }
 218
 219 bool VM::is_tape_inserted(int drv)
 220 {
 221         return drec->is_tape_inserted();
 222 }
 223
 224 bool VM::is_tape_playing(int drv)
 225 {
 226         return drec->is_tape_playing();
 227 }
 228
 229 bool VM::is_tape_recording(int drv)
 230 {
 231         return drec->is_tape_recording();
 232 }
 233
 234 int VM::get_tape_position(int drv)
 235 {
 236         return drec->get_tape_position();
 237 }
 238
 239 const _TCHAR* VM::get_tape_message(int drv)
 240 {
 241         return drec->get_message();
 242 }
 243
 244 bool VM::is_frame_skippable()
 245 {
 246         return event->is_frame_skippable();
 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   2
 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 }
 267
 268 bool VM::load_state(FILEIO* state_fio)
 269 {
 270         if(state_fio->FgetUint32() != STATE_VERSION) {
 271                 return false;
 272         }
 273         for(DEVICE* device = first_device; device; device = device->next_device) {
 274                 if(!device->load_state(state_fio)) {
 275                         return false;
 276                 }
 277         }
 278         state_fio->Fread(ram, sizeof(ram), 1);
 279         return true;
 280 }
 281