source/src/vm/mz5500/mz5500.cpp

   1 /*
   2         SHARP MZ-5500 Emulator 'EmuZ-5500'
   3
   4         Author : Takeda.Toshiya
   5         Date   : 2008.04.10 -
   6
   7         [ virtual machine ]
   8 */
   9
  10 #include "mz5500.h"
  11 #include "../../emu.h"
  12 #include "../device.h"
  13 #include "../event.h"
  14
  15 #include "../disk.h"
  16 #include "../i8237.h"
  17 #include "../i8255.h"
  18 #include "../i8259.h"
  19 #include "../i286.h"
  20 #include "../io.h"
  21 #include "../ls393.h"
  22 #include "../rp5c01.h"
  23 #include "../upd7220.h"
  24 #include "../upd765a.h"
  25 #include "../ym2203.h"
  26 #include "../z80ctc.h"
  27 #include "../z80sio.h"
  28
  29 #ifdef USE_DEBUGGER
  30 #include "../debugger.h"
  31 #endif
  32
  33 #include "display.h"
  34 #include "keyboard.h"
  35 #include "memory.h"
  36 #include "sysport.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         dma = new I8237(this, emu);
  52         pio = new I8255(this, emu);
  53         pic = new I8259(this, emu);
  54         cpu = new I286(this, emu);
  55         io = new IO(this, emu);
  56         div = new LS393(this, emu);
  57         rtc = new RP5C01(this, emu);
  58         gdc = new UPD7220(this, emu);
  59         fdc = new UPD765A(this, emu);
  60         psg = new YM2203(this, emu);    // AY-3-8912
  61         ctc0 = new Z80CTC(this, emu);
  62 #if defined(_MZ6500) || defined(_MZ6550)
  63         ctc1 = new Z80CTC(this, emu);
  64 #endif
  65         sio = new Z80SIO(this, emu);
  66
  67         display = new DISPLAY(this, emu);
  68         keyboard = new KEYBOARD(this, emu);
  69         memory = new MEMORY(this, emu);
  70         sysport = new SYSPORT(this, emu);
  71
  72         // set contexts
  73         event->set_context_cpu(cpu);
  74         event->set_context_sound(psg);
  75
  76         dma->set_context_memory(memory);
  77         dma->set_context_ch1(fdc);
  78         pio->set_context_port_c(keyboard, SIG_KEYBOARD_INPUT, 3, 0);
  79         pic->set_context_cpu(cpu);
  80         div->set_context_2qb(ctc0, SIG_Z80CTC_TRIG_3, 1);
  81 #if defined(_MZ6500) || defined(_MZ6550)
  82         div->set_context_1qb(ctc1, SIG_Z80CTC_TRIG_0, 1);
  83         div->set_context_2qb(ctc1, SIG_Z80CTC_TRIG_1, 1);
  84         div->set_context_2qb(ctc1, SIG_Z80CTC_TRIG_2, 1);
  85         div->set_context_2qd(ctc1, SIG_Z80CTC_TRIG_3, 1);
  86 #endif
  87         rtc->set_context_alarm(pic, SIG_I8259_IR0 | SIG_I8259_CHIP1, 1);
  88         gdc->set_vram_ptr(memory->get_vram(), 0x80000);
  89         gdc->set_context_vsync(pic, SIG_I8259_IR0 | SIG_I8259_CHIP0, 1);
  90         fdc->set_context_irq(pic, SIG_I8259_IR1 | SIG_I8259_CHIP1, 1);
  91         fdc->set_context_drq(dma, SIG_I8237_CH1, 1);
  92         psg->set_context_port_a(pic, SIG_I8259_IR7 | SIG_I8259_CHIP0, 0x20, 0);
  93         psg->set_context_port_a(pic, SIG_I8259_IR7 | SIG_I8259_CHIP1, 0x40, 0);
  94         psg->set_context_port_a(memory, SIG_MEMORY_BANK, 0xe0, 0);
  95         ctc0->set_context_intr(pic, SIG_I8259_IR5 | SIG_I8259_CHIP0);
  96         ctc0->set_context_zc0(div, SIG_LS393_CLK, 1);
  97         ctc0->set_context_zc1(sio, SIG_Z80SIO_TX_CLK_CH0, 1);
  98         ctc0->set_context_zc1(sio, SIG_Z80SIO_RX_CLK_CH0, 1);
  99         ctc0->set_context_zc2(sio, SIG_Z80SIO_TX_CLK_CH1, 1);
 100         ctc0->set_context_zc2(sio, SIG_Z80SIO_RX_CLK_CH1, 1);
 101 #if defined(_MZ6500) || defined(_MZ6550)
 102         ctc0->set_context_child(ctc1);
 103         ctc1->set_context_intr(pic, SIG_I8259_IR5 | SIG_I8259_CHIP0);
 104 #endif
 105         sio->set_context_intr(pic, SIG_I8259_IR1 | SIG_I8259_CHIP0);
 106
 107         display->set_vram_ptr(memory->get_vram());
 108         display->set_sync_ptr(gdc->get_sync());
 109         display->set_ra_ptr(gdc->get_ra());
 110         display->set_cs_ptr(gdc->get_cs());
 111         display->set_ead_ptr(gdc->get_ead());
 112         keyboard->set_context_pio(pio);
 113         keyboard->set_context_pic(pic);
 114         memory->set_context_cpu(cpu);
 115         sysport->set_context_fdc(fdc);
 116         sysport->set_context_ctc(ctc0);
 117         sysport->set_context_sio(sio);
 118
 119         // cpu bus
 120         cpu->set_context_mem(memory);
 121         cpu->set_context_io(io);
 122         cpu->set_context_intr(pic);
 123 #ifdef SINGLE_MODE_DMA
 124         cpu->set_context_dma(dma);
 125 #endif
 126 #ifdef USE_DEBUGGER
 127         cpu->set_context_debugger(new DEBUGGER(this, emu));
 128 #endif
 129
 130         // i/o bus
 131         io->set_iomap_range_rw(0x00, 0x0f, dma);
 132         io->set_iomap_range_rw(0x10, 0x1f, pio);
 133         io->set_iomap_range_rw(0x20, 0x2f, fdc);
 134         for(int i = 0x30; i < 0x40; i += 2) {
 135                 io->set_iomap_alias_rw(i, pic, I8259_ADDR_CHIP0 | ((i >> 1) & 1));
 136         }
 137         for(int i = 0x40; i < 0x50; i += 2) {
 138                 io->set_iomap_alias_rw(i, pic, I8259_ADDR_CHIP1 | ((i >> 1) & 1));
 139         }
 140         io->set_iomap_range_w(0x50, 0x5f, memory);
 141         io->set_iomap_range_r(0x60, 0x6f, sysport);
 142         io->set_iomap_range_w(0x70, 0x7f, sysport);
 143 #if defined(_MZ6500) || defined(_MZ6550)
 144         io->set_iomap_single_rw(0xcd, memory);
 145 #endif
 146         for(int i = 0x100; i < 0x110; i += 2) {
 147                 io->set_iomap_alias_rw(i, gdc, (i >> 1) & 1);
 148         }
 149         io->set_iomap_range_rw(0x110, 0x17f, display);
 150         io->set_iomap_range_rw(0x200, 0x20f, sio);
 151         io->set_iomap_range_rw(0x210, 0x21f, ctc0);
 152         io->set_iomap_range_rw(0x220, 0x22f, rtc);
 153         for(int i = 0x230; i < 0x240; i++) {
 154                 io->set_iomap_alias_rw(i, psg, ~i & 1);
 155         }
 156         io->set_iomap_range_r(0x240, 0x25f, sysport);
 157         io->set_iomap_range_w(0x260, 0x26f, sysport);
 158         io->set_iomap_range_r(0x270, 0x27f, sysport);
 159
 160         // initialize all devices
 161         for(DEVICE* device = first_device; device; device = device->next_device) {
 162                 device->initialize();
 163         }
 164         for(int i = 0; i < 4; i++) {
 165 #if defined(_MZ6500) || defined(_MZ6550)
 166                 fdc->set_drive_type(i, DRIVE_TYPE_2HD);
 167 #else
 168                 fdc->set_drive_type(i, DRIVE_TYPE_2D);
 169 #endif
 170         }
 171 }
 172
 173 VM::~VM()
 174 {
 175         // delete all devices
 176         for(DEVICE* device = first_device; device;) {
 177                 DEVICE *next_device = device->next_device;
 178                 device->release();
 179                 delete device;
 180                 device = next_device;
 181         }
 182 }
 183
 184 DEVICE* VM::get_device(int id)
 185 {
 186         for(DEVICE* device = first_device; device; device = device->next_device) {
 187                 if(device->this_device_id == id) {
 188                         return device;
 189                 }
 190         }
 191         return NULL;
 192 }
 193
 194 // ----------------------------------------------------------------------------
 195 // drive virtual machine
 196 // ----------------------------------------------------------------------------
 197
 198 void VM::reset()
 199 {
 200         // reset all devices
 201         for(DEVICE* device = first_device; device; device = device->next_device) {
 202                 device->reset();
 203         }
 204 }
 205
 206 void VM::special_reset()
 207 {
 208         // nmi
 209         cpu->write_signal(SIG_CPU_NMI, 1, 1);
 210         sysport->nmi_reset();
 211 }
 212
 213 void VM::run()
 214 {
 215         event->drive();
 216 }
 217
 218 double VM::frame_rate()
 219 {
 220         return event->frame_rate();
 221 }
 222
 223 // ----------------------------------------------------------------------------
 224 // debugger
 225 // ----------------------------------------------------------------------------
 226
 227 #ifdef USE_DEBUGGER
 228 DEVICE *VM::get_cpu(int index)
 229 {
 230         if(index == 0) {
 231                 return cpu;
 232         }
 233         return NULL;
 234 }
 235 #endif
 236
 237 // ----------------------------------------------------------------------------
 238 // draw screen
 239 // ----------------------------------------------------------------------------
 240
 241 void VM::draw_screen()
 242 {
 243         display->draw_screen();
 244 }
 245
 246 int VM::access_lamp()
 247 {
 248         uint32 status = fdc->read_signal(0);
 249         return (status & (1 | 4)) ? 1 : (status & (2 | 8)) ? 2 : 0;
 250 }
 251
 252 // ----------------------------------------------------------------------------
 253 // soud manager
 254 // ----------------------------------------------------------------------------
 255
 256 void VM::initialize_sound(int rate, int samples)
 257 {
 258         // init sound manager
 259         event->initialize_sound(rate, samples);
 260
 261         // init sound gen
 262         psg->init(rate, 4000000, samples, 0, 0);
 263 }
 264
 265 uint16* VM::create_sound(int* extra_frames)
 266 {
 267         return event->create_sound(extra_frames);
 268 }
 269
 270 int VM::sound_buffer_ptr()
 271 {
 272         return event->sound_buffer_ptr();
 273 }
 274
 275 // ----------------------------------------------------------------------------
 276 // notify key
 277 // ----------------------------------------------------------------------------
 278
 279 void VM::key_down(int code, bool repeat)
 280 {
 281         keyboard->key_down(code);
 282 }
 283
 284 void VM::key_up(int code)
 285 {
 286 //      keyboard->key_up(code);
 287 }
 288
 289 // ----------------------------------------------------------------------------
 290 // user interface
 291 // ----------------------------------------------------------------------------
 292
 293 void VM::open_disk(int drv, _TCHAR* file_path, int offset)
 294 {
 295         fdc->open_disk(drv, file_path, offset);
 296 }
 297
 298 void VM::close_disk(int drv)
 299 {
 300         fdc->close_disk(drv);
 301 }
 302
 303 bool VM::disk_inserted(int drv)
 304 {
 305         return fdc->disk_inserted(drv);
 306 }
 307
 308 bool VM::now_skip()
 309 {
 310         return event->now_skip();
 311 }
 312
 313 void VM::update_config()
 314 {
 315         for(DEVICE* device = first_device; device; device = device->next_device) {
 316                 device->update_config();
 317         }
 318 }
 319
 320 #define STATE_VERSION   2
 321
 322 void VM::save_state(FILEIO* state_fio)
 323 {
 324         state_fio->FputUint32(STATE_VERSION);
 325
 326         for(DEVICE* device = first_device; device; device = device->next_device) {
 327                 device->save_state(state_fio);
 328         }
 329 }
 330
 331 bool VM::load_state(FILEIO* state_fio)
 332 {
 333         if(state_fio->FgetUint32() != STATE_VERSION) {
 334                 return false;
 335         }
 336         for(DEVICE* device = first_device; device; device = device->next_device) {
 337                 if(!device->load_state(state_fio)) {
 338                         return false;
 339                 }
 340         }
 341         return true;
 342 }
 343