source/src/vm/qc10/qc10.cpp

   1 /*
   2         EPSON QC-10 Emulator 'eQC-10'
   3
   4         Author : Takeda.Toshiya
   5         Date   : 2008.02.13 -
   6
   7         [ virtual machine ]
   8 */
   9
  10 #include "qc10.h"
  11 #include "../../emu.h"
  12 #include "../device.h"
  13 #include "../event.h"
  14
  15 #include "../disk.h"
  16 #include "../hd146818p.h"
  17 #include "../i8237.h"
  18 #include "../i8253.h"
  19 #include "../i8255.h"
  20 #include "../i8259.h"
  21 #include "../io.h"
  22 #include "../pcm1bit.h"
  23 #include "../upd7220.h"
  24 #include "../upd765a.h"
  25 #include "../z80.h"
  26 #include "../z80sio.h"
  27
  28 #ifdef USE_DEBUGGER
  29 #include "../debugger.h"
  30 #endif
  31
  32 #include "display.h"
  33 #include "floppy.h"
  34 #include "keyboard.h"
  35 #include "memory.h"
  36 #include "mfont.h"
  37
  38 // ----------------------------------------------------------------------------
  39 // initialize
  40 // ----------------------------------------------------------------------------
  41
  42 VM::VM(EMU* parent_emu) : emu(parent_emu)
  43 {
  44         // create devices
  45         first_device = last_device = NULL;
  46         dummy = new DEVICE(this, emu);  // must be 1st device
  47         event = new EVENT(this, emu);   // must be 2nd device
  48
  49         rtc = new HD146818P(this, emu);
  50         dma0 = new I8237(this, emu);
  51         dma1 = new I8237(this, emu);
  52         pit0 = new I8253(this, emu);
  53         pit1 = new I8253(this, emu);
  54         pio = new I8255(this, emu);
  55         pic = new I8259(this, emu);
  56         io = new IO(this, emu);
  57         pcm = new PCM1BIT(this, emu);
  58         gdc = new UPD7220(this, emu);
  59         fdc = new UPD765A(this, emu);
  60         cpu = new Z80(this, emu);
  61         sio = new Z80SIO(this, emu);    // uPD7201
  62
  63         display = new DISPLAY(this, emu);
  64         floppy = new FLOPPY(this, emu);
  65         keyboard = new KEYBOARD(this, emu);
  66         memory = new MEMORY(this, emu);
  67         mfont = new MFONT(this, emu);
  68
  69         // set contexts
  70         event->set_context_cpu(cpu);
  71         event->set_context_sound(pcm);
  72
  73         rtc->set_context_intr(pic, SIG_I8259_IR2 | SIG_I8259_CHIP1, 1);
  74         dma0->set_context_memory(memory);
  75         dma0->set_context_ch0(fdc);
  76         dma0->set_context_ch1(gdc);
  77 #ifdef SINGLE_MODE_DMA
  78         dma0->set_context_child_dma(dma1);
  79 #endif
  80         dma1->set_context_memory(memory);
  81         pit0->set_context_ch0(memory, SIG_MEMORY_PCM, 1);
  82         pit0->set_context_ch1(pic, SIG_I8259_IR5 | SIG_I8259_CHIP1, 1);
  83         pit0->set_context_ch2(pic, SIG_I8259_IR1 | SIG_I8259_CHIP0, 1);
  84         pit0->set_constant_clock(2, CPU_CLOCKS >> 1);   // 1.9968MHz
  85         pit1->set_context_ch0(pcm, SIG_PCM1BIT_SIGNAL, 1);
  86         pit1->set_context_ch1(pit0, SIG_I8253_CLOCK_0, 1);
  87         pit1->set_context_ch1(pit0, SIG_I8253_CLOCK_1, 1);
  88         pit1->set_context_ch1(sio, SIG_Z80SIO_TX_CLK_CH0, 1);
  89         pit1->set_context_ch1(sio, SIG_Z80SIO_RX_CLK_CH0, 1);
  90         pit1->set_context_ch2(sio, SIG_Z80SIO_TX_CLK_CH1, 1);
  91         pit1->set_context_ch2(sio, SIG_Z80SIO_RX_CLK_CH1, 1);
  92         pit1->set_constant_clock(0, CPU_CLOCKS >> 1);   // 1.9968MHz
  93         pit1->set_constant_clock(1, CPU_CLOCKS >> 1);   // 1.9968MHz
  94         pit1->set_constant_clock(2, CPU_CLOCKS >> 1);   // 1.9968MHz
  95         pio->set_context_port_c(pic, SIG_I8259_IR0 | SIG_I8259_CHIP1, 8, 0);
  96         pic->set_context_cpu(cpu);
  97         gdc->set_context_drq(dma0, SIG_I8237_CH1, 1);
  98         gdc->set_vram_ptr(display->get_vram(), VRAM_SIZE);
  99         // IR5 of I8259 #0 is from light pen
 100         fdc->set_context_irq(pic, SIG_I8259_IR6 | SIG_I8259_CHIP0, 1);
 101         fdc->set_context_irq(memory, SIG_MEMORY_FDC_IRQ, 1);
 102         fdc->set_context_drq(dma0, SIG_I8237_CH0, 1);
 103         sio->set_context_intr(pic, SIG_I8259_IR4 | SIG_I8259_CHIP0);
 104         sio->set_context_send(0, keyboard, SIG_KEYBOARD_RECV);
 105 //      sio->set_tx_clock(0, 1200 * 16);        // 1200 baud for keyboard
 106 //      sio->set_rx_clock(0, 1200 * 16);        // clock is from 8253 ch1 (1.9968MHz/104)
 107 //      sio->set_tx_clock(1, 9600 * 16);        // 9600 baud for RS-232C
 108 //      sio->set_rx_clock(1, 9600 * 16);        // clock is from 8253 ch2 (1.9968MHz/13)
 109
 110         display->set_context_gdc(gdc);
 111         display->set_sync_ptr(gdc->get_sync());
 112         display->set_zoom_ptr(gdc->get_zoom());
 113         display->set_ra_ptr(gdc->get_ra());
 114         display->set_cs_ptr(gdc->get_cs());
 115         display->set_ead_ptr(gdc->get_ead());
 116         floppy->set_context_fdc(fdc);
 117         floppy->set_context_mem(memory);
 118         keyboard->set_context_sio(sio);
 119         memory->set_context_pit(pit0);
 120         memory->set_context_pcm(pcm);
 121         memory->set_context_fdc(fdc);
 122         mfont->set_context_pic(pic);
 123
 124         // cpu bus
 125         cpu->set_context_mem(memory);
 126         cpu->set_context_io(io);
 127         cpu->set_context_intr(pic);
 128 #ifdef SINGLE_MODE_DMA
 129         cpu->set_context_dma(dma0);
 130 #endif
 131 #ifdef USE_DEBUGGER
 132         cpu->set_context_debugger(new DEBUGGER(this, emu));
 133 #endif
 134
 135         // i/o bus
 136         io->set_iomap_range_rw(0x00, 0x03, pit0);
 137         io->set_iomap_range_rw(0x04, 0x07, pit1);
 138         io->set_iomap_alias_rw(0x08, pic, I8259_ADDR_CHIP0 | 0);
 139         io->set_iomap_alias_rw(0x09, pic, I8259_ADDR_CHIP0 | 1);
 140         io->set_iomap_alias_rw(0x0c, pic, I8259_ADDR_CHIP1 | 0);
 141         io->set_iomap_alias_rw(0x0d, pic, I8259_ADDR_CHIP1 | 1);
 142         io->set_iomap_alias_rw(0x10, sio, 0);
 143         io->set_iomap_alias_rw(0x11, sio, 2);
 144         io->set_iomap_alias_rw(0x12, sio, 1);
 145         io->set_iomap_alias_rw(0x13, sio, 3);
 146         io->set_iomap_range_rw(0x14, 0x17, pio);
 147         io->set_iomap_range_rw(0x18, 0x1b, memory);
 148         io->set_iomap_range_w(0x1c, 0x23, memory);
 149         io->set_iomap_range_rw(0x2c, 0x2d, display);
 150         io->set_iomap_range_r(0x30, 0x33, memory);
 151         io->set_iomap_range_w(0x30, 0x33, floppy);
 152         io->set_iomap_range_rw(0x34, 0x35, fdc);
 153         io->set_iomap_range_rw(0x38, 0x3b, gdc);
 154         io->set_iomap_range_rw(0x3c, 0x3d, rtc);
 155         io->set_iomap_range_rw(0x40, 0x4f, dma0);
 156         io->set_iomap_range_rw(0x50, 0x5f, dma1);
 157         io->set_iomap_range_rw(0xfc, 0xfd, mfont);
 158
 159         // initialize all devices
 160         for(DEVICE* device = first_device; device; device = device->next_device) {
 161                 device->initialize();
 162         }
 163         for(int i = 0; i < 4; i++) {
 164                 fdc->set_drive_type(i, DRIVE_TYPE_2D);
 165         }
 166 }
 167
 168 VM::~VM()
 169 {
 170         // delete all devices
 171         for(DEVICE* device = first_device; device;) {
 172                 DEVICE *next_device = device->next_device;
 173                 device->release();
 174                 delete device;
 175                 device = next_device;
 176         }
 177 }
 178
 179 DEVICE* VM::get_device(int id)
 180 {
 181         for(DEVICE* device = first_device; device; device = device->next_device) {
 182                 if(device->this_device_id == id) {
 183                         return device;
 184                 }
 185         }
 186         return NULL;
 187 }
 188
 189 // ----------------------------------------------------------------------------
 190 // drive virtual machine
 191 // ----------------------------------------------------------------------------
 192
 193 void VM::reset()
 194 {
 195         // reset all devices
 196         for(DEVICE* device = first_device; device; device = device->next_device) {
 197                 device->reset();
 198         }
 199 }
 200
 201 void VM::run()
 202 {
 203         event->drive();
 204 }
 205
 206 double VM::frame_rate()
 207 {
 208         return event->frame_rate();
 209 }
 210
 211 // ----------------------------------------------------------------------------
 212 // debugger
 213 // ----------------------------------------------------------------------------
 214
 215 #ifdef USE_DEBUGGER
 216 DEVICE *VM::get_cpu(int index)
 217 {
 218         if(index == 0) {
 219                 return cpu;
 220         }
 221         return NULL;
 222 }
 223 #endif
 224
 225 // ----------------------------------------------------------------------------
 226 // draw screen
 227 // ----------------------------------------------------------------------------
 228
 229 void VM::draw_screen()
 230 {
 231         display->draw_screen();
 232 }
 233
 234 int VM::access_lamp()
 235 {
 236         uint32 status = fdc->read_signal(0);
 237         return (status & (1 | 4)) ? 1 : (status & (2 | 8)) ? 2 : 0;
 238 }
 239
 240 // ----------------------------------------------------------------------------
 241 // soud manager
 242 // ----------------------------------------------------------------------------
 243
 244 void VM::initialize_sound(int rate, int samples)
 245 {
 246         // init sound manager
 247         event->initialize_sound(rate, samples);
 248
 249         // init sound gen
 250         pcm->init(rate, 4000);
 251 }
 252
 253 uint16* VM::create_sound(int* extra_frames)
 254 {
 255         return event->create_sound(extra_frames);
 256 }
 257
 258 int VM::sound_buffer_ptr()
 259 {
 260         return event->sound_buffer_ptr();
 261 }
 262
 263 // ----------------------------------------------------------------------------
 264 // notify key
 265 // ----------------------------------------------------------------------------
 266
 267 void VM::key_down(int code, bool repeat)
 268 {
 269         keyboard->key_down(code);
 270 }
 271
 272 void VM::key_up(int code)
 273 {
 274         keyboard->key_up(code);
 275 }
 276
 277 // ----------------------------------------------------------------------------
 278 // user interface
 279 // ----------------------------------------------------------------------------
 280
 281 void VM::open_disk(int drv, _TCHAR* file_path, int bank)
 282 {
 283         fdc->open_disk(drv, file_path, bank);
 284 }
 285
 286 void VM::close_disk(int drv)
 287 {
 288         fdc->close_disk(drv);
 289 }
 290
 291 bool VM::disk_inserted(int drv)
 292 {
 293         return fdc->disk_inserted(drv);
 294 }
 295
 296 void VM::set_disk_protected(int drv, bool value)
 297 {
 298         fdc->set_disk_protected(drv, value);
 299 }
 300
 301 bool VM::get_disk_protected(int drv)
 302 {
 303         return fdc->get_disk_protected(drv);
 304 }
 305
 306 bool VM::now_skip()
 307 {
 308         return event->now_skip();
 309 }
 310
 311 void VM::update_config()
 312 {
 313         for(DEVICE* device = first_device; device; device = device->next_device) {
 314                 device->update_config();
 315         }
 316 }
 317
 318 #define STATE_VERSION   1
 319
 320 void VM::save_state(FILEIO* state_fio)
 321 {
 322         state_fio->FputUint32(STATE_VERSION);
 323
 324         for(DEVICE* device = first_device; device; device = device->next_device) {
 325                 device->save_state(state_fio);
 326         }
 327 }
 328
 329 bool VM::load_state(FILEIO* state_fio)
 330 {
 331         if(state_fio->FgetUint32() != STATE_VERSION) {
 332                 return false;
 333         }
 334         for(DEVICE* device = first_device; device; device = device->next_device) {
 335                 if(!device->load_state(state_fio)) {
 336                         return false;
 337                 }
 338         }
 339         return true;
 340 }
 341