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