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