source/src/vm/babbage2nd/babbage2nd.cpp

   1 /*
   2         Gijutsu-Hyoron-Sha Babbage-2nd Emulator 'eBabbage-2nd'
   3
   4         Author : Takeda.Toshiya
   5         Date   : 2009.12.26 -
   6
   7         [ virtual machine ]
   8 */
   9
  10 #include "babbage2nd.h"
  11 #include "../../emu.h"
  12 #include "../device.h"
  13 #include "../event.h"
  14
  15 #include "../io.h"
  16 #include "../memory.h"
  17 #include "../z80.h"
  18 #include "../z80ctc.h"
  19 #include "../z80pio.h"
  20
  21 #ifdef USE_DEBUGGER
  22 #include "../debugger.h"
  23 #endif
  24
  25 #include "display.h"
  26 #include "keyboard.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         io = new IO(this, emu);
  40         memory = new MEMORY(this, emu);
  41         cpu = new Z80(this, emu);
  42         ctc = new Z80CTC(this, emu);
  43         pio1 = new Z80PIO(this, emu);
  44         pio1->set_device_name(_T("Z80 PIO (LEDs)"));
  45         pio2 = new Z80PIO(this, emu);
  46         pio2->set_device_name(_T("Z80 PIO (7-Seg/Keyboard)"));
  47
  48         display = new DISPLAY(this, emu);
  49         keyboard = new KEYBOARD(this, emu);
  50
  51         // Set names
  52 #if defined(_USE_QT)
  53         dummy->set_device_name(_T("1st Dummy"));
  54         pio1->set_device_name(_T("Z80 PIO(LEDs)"));
  55         pio2->set_device_name(_T("Z80 PIO(7SEG/KEYBOARD)"));
  56 #endif
  57         // set contexts
  58         event->set_context_cpu(cpu);
  59
  60         pio2->set_context_port_b(display, SIG_DISPLAY_7SEG_LED, 0xff, 0);
  61         keyboard->set_context_pio(pio2);
  62         // p.145, fig.3-4
  63         ctc->set_context_zc2(ctc, SIG_Z80CTC_TRIG_1, 1);
  64         ctc->set_context_zc1(ctc, SIG_Z80CTC_TRIG_0, 1);
  65         // p.114, fig.2-52
  66         pio1->set_context_port_b(display, SIG_DISPLAY_8BIT_LED, 0xff, 0);
  67         //pio1->set_context_port_b(pio1, SIG_Z80PIO_PORT_A, 0xff, 0);
  68
  69         // cpu bus
  70         cpu->set_context_mem(memory);
  71         cpu->set_context_io(io);
  72         cpu->set_context_intr(ctc);
  73 #ifdef USE_DEBUGGER
  74         cpu->set_context_debugger(new DEBUGGER(this, emu));
  75 #endif
  76
  77         // z80 family daisy chain
  78         ctc->set_context_intr(cpu, 0);
  79         ctc->set_context_child(pio1);
  80         pio1->set_context_intr(cpu, 1);
  81         pio1->set_context_child(pio2);
  82         pio2->set_context_intr(cpu, 2);
  83
  84         // memory bus
  85         memset(ram, 0, sizeof(ram));
  86         memset(rom, 0xff, sizeof(rom));
  87
  88         memory->read_bios(_T("MON.ROM"), rom, sizeof(rom));
  89
  90         memory->set_memory_r(0x0000, 0x07ff, rom);
  91         memory->set_memory_rw(0x1000, 0x17ff, ram);
  92
  93         // i/o bus
  94         io->set_iomap_range_rw(0x00, 0x03, ctc);
  95         io->set_iomap_range_rw(0x10, 0x13, pio1);
  96         io->set_iomap_range_rw(0x20, 0x23, pio2);
  97
  98         // initialize all devices
  99         for(DEVICE* device = first_device; device; device = device->next_device) {
 100                 device->initialize();
 101         }
 102 }
 103
 104 VM::~VM()
 105 {
 106         // delete all devices
 107         for(DEVICE* device = first_device; device;) {
 108                 DEVICE *next_device = device->next_device;
 109                 device->release();
 110                 delete device;
 111                 device = next_device;
 112         }
 113 }
 114
 115 DEVICE* VM::get_device(int id)
 116 {
 117         for(DEVICE* device = first_device; device; device = device->next_device) {
 118                 if(device->this_device_id == id) {
 119                         return device;
 120                 }
 121         }
 122         return NULL;
 123 }
 124
 125 // ----------------------------------------------------------------------------
 126 // drive virtual machine
 127 // ----------------------------------------------------------------------------
 128
 129 void VM::reset()
 130 {
 131         // reset all devices
 132         for(DEVICE* device = first_device; device; device = device->next_device) {
 133                 device->reset();
 134         }
 135 }
 136
 137 void VM::run()
 138 {
 139         event->drive();
 140 }
 141
 142 // ----------------------------------------------------------------------------
 143 // debugger
 144 // ----------------------------------------------------------------------------
 145
 146 #ifdef USE_DEBUGGER
 147 DEVICE *VM::get_cpu(int index)
 148 {
 149         if(index == 0) {
 150                 return cpu;
 151         }
 152         return NULL;
 153 }
 154 #endif
 155
 156 // ----------------------------------------------------------------------------
 157 // draw screen
 158 // ----------------------------------------------------------------------------
 159
 160 void VM::draw_screen()
 161 {
 162         display->draw_screen();
 163 }
 164
 165 // ----------------------------------------------------------------------------
 166 // soud manager
 167 // ----------------------------------------------------------------------------
 168
 169 void VM::initialize_sound(int rate, int samples)
 170 {
 171         // init sound manager
 172         event->initialize_sound(rate, samples);
 173 }
 174
 175 uint16_t* VM::create_sound(int* extra_frames)
 176 {
 177         return event->create_sound(extra_frames);
 178 }
 179
 180 int VM::get_sound_buffer_ptr()
 181 {
 182         return event->get_sound_buffer_ptr();
 183 }
 184
 185 // ----------------------------------------------------------------------------
 186 // notify key
 187 // ----------------------------------------------------------------------------
 188
 189 void VM::key_down(int code, bool repeat)
 190 {
 191         keyboard->key_down(code);
 192 }
 193
 194 void VM::key_up(int code)
 195 {
 196         //keyboard->key_up(code);
 197 }
 198
 199 // ----------------------------------------------------------------------------
 200 // user interface
 201 // ----------------------------------------------------------------------------
 202
 203 void VM::load_binary(int drv, const _TCHAR* file_path)
 204 {
 205         if(drv == 0) {
 206                 memory->read_image(file_path, ram, sizeof(ram));
 207         }
 208 }
 209
 210 void VM::save_binary(int drv, const _TCHAR* file_path)
 211 {
 212         if(drv == 0) {
 213                 memory->write_image(file_path, ram, sizeof(ram));
 214         }
 215 }
 216
 217 bool VM::is_frame_skippable()
 218 {
 219         return event->is_frame_skippable();
 220 }
 221
 222 void VM::update_config()
 223 {
 224         for(DEVICE* device = first_device; device; device = device->next_device) {
 225                 device->update_config();
 226         }
 227 }
 228
 229 #define STATE_VERSION   2
 230
 231 void VM::save_state(FILEIO* state_fio)
 232 {
 233         state_fio->FputUint32(STATE_VERSION);
 234
 235         for(DEVICE* device = first_device; device; device = device->next_device) {
 236                 const char *name = typeid(*device).name() + 6; // skip "class "
 237
 238                 state_fio->FputInt32(strlen(name));
 239                 state_fio->Fwrite(name, strlen(name), 1);
 240                 device->save_state(state_fio);
 241         }
 242         state_fio->Fwrite(ram, sizeof(ram), 1);
 243 }
 244
 245 bool VM::load_state(FILEIO* state_fio)
 246 {
 247         if(state_fio->FgetUint32() != STATE_VERSION) {
 248                 return false;
 249         }
 250         for(DEVICE* device = first_device; device; device = device->next_device) {
 251                 const char *name = typeid(*device).name() + 6; // skip "class "
 252
 253                 if(!(state_fio->FgetInt32() == strlen(name) && state_fio->Fcompare(name, strlen(name)))) {
 254                         return false;
 255                 }
 256                 if(!device->load_state(state_fio)) {
 257                         return false;
 258                 }
 259         }
 260         state_fio->Fread(ram, sizeof(ram), 1);
 261         return true;
 262 }
 263