source/src/vm/mz2800/mz2800.cpp

   1 /*
   2         SHARP MZ-2800 Emulator 'EmuZ-2800'
   3
   4         Author : Takeda.Toshiya
   5         Date   : 2007.08.13 -
   6
   7         [ virtual machine ]
   8 */
   9
  10 #include "mz2800.h"
  11 #include "../../emu.h"
  12 #include "../device.h"
  13 #include "../event.h"
  14
  15 #include "../i8253.h"
  16 #include "../i8255.h"
  17 #include "../i8259.h"
  18 #include "../i286.h"
  19 #include "../io.h"
  20 #include "../mb8877.h"
  21 #include "../pcm1bit.h"
  22 #include "../rp5c01.h"
  23 //#include "../sasi.h"
  24 #include "../upd71071.h"
  25 #include "../ym2203.h"
  26 #include "../z80pio.h"
  27 #include "../z80sio.h"
  28
  29 #ifdef USE_DEBUGGER
  30 #include "../debugger.h"
  31 #endif
  32
  33 #include "crtc.h"
  34 #include "floppy.h"
  35 #include "joystick.h"
  36 #include "keyboard.h"
  37 #include "memory.h"
  38 #include "mouse.h"
  39 #include "reset.h"
  40 #include "serial.h"
  41 #include "sysport.h"
  42
  43 #include "../../fileio.h"
  44
  45 // ----------------------------------------------------------------------------
  46 // initialize
  47 // ----------------------------------------------------------------------------
  48
  49 VM::VM(EMU* parent_emu) : emu(parent_emu)
  50 {
  51         // create devices
  52         first_device = last_device = NULL;
  53         dummy = new DEVICE(this, emu);  // must be 1st device
  54         event = new EVENT(this, emu);   // must be 2nd device
  55
  56         cpu = new I286(this, emu);
  57         pit = new I8253(this, emu);
  58         pio0 = new I8255(this, emu);
  59         pic = new I8259(this, emu);
  60         io = new IO(this, emu);
  61         fdc = new MB8877(this, emu);
  62         pcm = new PCM1BIT(this, emu);
  63         rtc = new RP5C01(this, emu);    // RP-5C15
  64 //      sasi = new SASI(this, emu);
  65         dma = new UPD71071(this, emu);
  66         opn = new YM2203(this, emu);
  67         pio1 = new Z80PIO(this, emu);
  68         sio = new Z80SIO(this, emu);
  69
  70         crtc = new CRTC(this, emu);
  71         floppy = new FLOPPY(this, emu);
  72         joystick = new JOYSTICK(this, emu);
  73         keyboard = new KEYBOARD(this, emu);
  74         memory = new MEMORY(this, emu);
  75         mouse = new MOUSE(this, emu);
  76         rst = new RESET(this, emu);
  77         serial = new SERIAL(this, emu);
  78         sysport = new SYSPORT(this, emu);
  79
  80         // set contexts
  81         event->set_context_cpu(cpu);
  82         event->set_context_sound(opn);
  83         event->set_context_sound(pcm);
  84
  85         pit->set_constant_clock(0, 31250);
  86         pit->set_constant_clock(2, 31250);
  87         pit->set_context_ch0(pit, SIG_I8253_CLOCK_1, 1);
  88         pit->set_context_ch0(pic, SIG_I8259_CHIP0 | SIG_I8259_IR0, 1);
  89         pit->set_context_ch1(pic, SIG_I8259_CHIP0 | SIG_I8259_IR6, 1);
  90         pit->set_context_ch2(pic, SIG_I8259_CHIP1 | SIG_I8259_IR0, 1);
  91         pio0->set_context_port_c(rst, SIG_RESET_CONTROL, 0xff, 0);
  92         pio0->set_context_port_c(crtc, SIG_CRTC_MASK, 0x01, 0);
  93         pio0->set_context_port_c(pcm, SIG_PCM1BIT_SIGNAL, 0x04, 0);
  94         pic->set_context_cpu(cpu);
  95         fdc->set_context_drq(dma, SIG_UPD71071_CH1, 1);
  96         fdc->set_context_irq(pic, SIG_I8259_CHIP0 | SIG_I8259_IR5, 1);
  97         rtc->set_context_alarm(pic, SIG_I8259_CHIP1 | SIG_I8259_IR2, 1);
  98         rtc->set_context_pulse(opn, SIG_YM2203_PORT_B, 8);
  99 //      sasi->set_context_drq(dma, SIG_UPD71071_CH0, 1);
 100 //      sasi->set_context_irq(pic, SIG_I8259_CHIP0 | SIG_I8259_IR4, 1);
 101         dma->set_context_memory(memory);
 102 //      dma->set_context_ch0(sasi);
 103         dma->set_context_ch1(fdc);
 104         dma->set_context_tc(pic, SIG_I8259_CHIP0 | SIG_I8259_IR3, 1);
 105         opn->set_context_irq(pic, SIG_I8259_CHIP1 | SIG_I8259_IR7, 1);
 106         opn->set_context_port_a(crtc, SIG_CRTC_PALLETE, 0x04, 0);
 107         opn->set_context_port_a(mouse, SIG_MOUSE_SEL, 0x08, 0);
 108         pio1->set_context_port_a(crtc, SIG_CRTC_COLUMN_SIZE, 0x20, 0);
 109         pio1->set_context_port_a(keyboard, SIG_KEYBOARD_COLUMN, 0xff, 0);
 110         sio->set_context_intr(pic, SIG_I8259_CHIP0 | SIG_I8259_IR2);
 111         sio->set_context_dtr1(mouse, SIG_MOUSE_DTR, 1);
 112
 113         crtc->set_context_pic(pic);
 114         crtc->set_context_pio(pio0);
 115         crtc->set_vram_ptr(memory->get_vram());
 116         crtc->set_tvram_ptr(memory->get_tvram());
 117         crtc->set_kanji_ptr(memory->get_kanji());
 118         crtc->set_pcg_ptr(memory->get_pcg());
 119         floppy->set_context_fdc(fdc);
 120         keyboard->set_context_pio0(pio0);
 121         keyboard->set_context_pio1(pio1);
 122         memory->set_context_crtc(crtc);
 123         mouse->set_context_sio(sio);
 124         serial->set_context_sio(sio);
 125         sysport->set_context_pit(pit);
 126         sysport->set_context_sio(sio);
 127
 128         // cpu bus
 129         cpu->set_context_mem(memory);
 130         cpu->set_context_io(io);
 131         cpu->set_context_intr(pic);
 132 #ifdef SINGLE_MODE_DMA
 133         cpu->set_context_dma(dma);
 134 #endif
 135 #ifdef USE_DEBUGGER
 136         cpu->set_context_debugger(new DEBUGGER(this, emu));
 137 #endif
 138
 139         // i/o bus
 140         io->set_iomap_range_rw(0x70, 0x7f, dma);
 141         io->set_iomap_alias_rw(0x80, pic, I8259_ADDR_CHIP0 | 0);
 142         io->set_iomap_alias_rw(0x81, pic, I8259_ADDR_CHIP0 | 1);
 143         io->set_iomap_alias_rw(0x82, pic, I8259_ADDR_CHIP1 | 0);
 144         io->set_iomap_alias_rw(0x83, pic, I8259_ADDR_CHIP1 | 1);
 145         io->set_iomap_range_rw(0x8c, 0x8d, memory);
 146         io->set_iovalue_single_r(0x8e, 0xff);   // dipswitch
 147         io->set_flipflop_single_rw(0x8f, 0x00); // shut
 148         io->set_iomap_range_rw(0xa0, 0xa3, serial);
 149         for(uint32 p = 0xae; p <= 0x1fae; p += 0x100) {
 150                 io->set_iomap_single_w(p, crtc);
 151         }
 152 //      io->set_iomap_single_rw(0xaf, sasi);
 153         io->set_iomap_range_rw(0xb0, 0xb3, serial);
 154         io->set_iomap_single_r(0xbe, sysport);
 155         io->set_iomap_range_rw(0xc8, 0xc9, opn);
 156         io->set_iovalue_single_r(0xca, 0x7f);   // voice communication ???
 157         for(uint32 p = 0xcc; p <= 0xfcc; p += 0x100) {
 158                 io->set_iomap_alias_rw(p, rtc, p >> 8);
 159         }
 160         io->set_iomap_single_w(0xcd, serial);
 161         io->set_iomap_single_rw(0xce, memory);
 162         io->set_iomap_range_rw(0xd8, 0xdb, fdc);
 163         io->set_iomap_range_w(0xdc, 0xdf, floppy);
 164         io->set_iomap_range_rw(0xe0, 0xe3, pio0);
 165         io->set_iomap_range_rw(0xe4, 0xe7, pit);
 166         io->set_iomap_range_rw(0xe8, 0xeb, pio1);
 167         io->set_iomap_single_rw(0xef, joystick);
 168 //      io->set_iomap_range_w(0xf0, 0xf3, sysport);
 169         io->set_iomap_single_w(0x170, crtc);
 170         io->set_iomap_single_w(0x172, crtc);
 171         io->set_iomap_single_w(0x174, crtc);
 172         io->set_iomap_single_w(0x176, crtc);
 173         io->set_iomap_range_w(0x178, 0x17b, crtc);
 174         io->set_iomap_single_w(0x270, crtc);
 175         io->set_iomap_single_w(0x272, crtc);
 176         io->set_iomap_single_rw(0x274, memory);
 177
 178         // initialize all devices
 179         for(DEVICE* device = first_device; device; device = device->next_device) {
 180                 device->initialize();
 181         }
 182 }
 183
 184 VM::~VM()
 185 {
 186         // delete all devices
 187         for(DEVICE* device = first_device; device;) {
 188                 DEVICE *next_device = device->next_device;
 189                 device->release();
 190                 delete device;
 191                 device = next_device;
 192         }
 193 }
 194
 195 DEVICE* VM::get_device(int id)
 196 {
 197         for(DEVICE* device = first_device; device; device = device->next_device) {
 198                 if(device->this_device_id == id) {
 199                         return device;
 200                 }
 201         }
 202         return NULL;
 203 }
 204
 205 // ----------------------------------------------------------------------------
 206 // drive virtual machine
 207 // ----------------------------------------------------------------------------
 208
 209 void VM::reset()
 210 {
 211         // reset all devices
 212         for(DEVICE* device = first_device; device; device = device->next_device) {
 213                 device->reset();
 214         }
 215         // temporary fix...
 216         for(DEVICE* device = first_device; device; device = device->next_device) {
 217                 device->reset();
 218         }
 219
 220         // set initial port status
 221         pio0->write_signal(SIG_I8255_PORT_B, 0x7c, 0xff);
 222         opn->write_signal(SIG_YM2203_PORT_B, 0x37, 0xff);
 223 }
 224
 225 void VM::cpu_reset()
 226 {
 227         cpu->reset();
 228 }
 229
 230 void VM::run()
 231 {
 232         event->drive();
 233 }
 234
 235 // ----------------------------------------------------------------------------
 236 // debugger
 237 // ----------------------------------------------------------------------------
 238
 239 #ifdef USE_DEBUGGER
 240 DEVICE *VM::get_cpu(int index)
 241 {
 242         if(index == 0) {
 243                 return cpu;
 244         }
 245         return NULL;
 246 }
 247 #endif
 248
 249 // ----------------------------------------------------------------------------
 250 // draw screen
 251 // ----------------------------------------------------------------------------
 252
 253 void VM::draw_screen()
 254 {
 255         crtc->draw_screen();
 256 }
 257
 258 int VM::access_lamp()
 259 {
 260         uint32 status = fdc->read_signal(0);
 261         return (status & (1 | 4)) ? 1 : (status & (2 | 8)) ? 2 : 0;
 262 }
 263
 264 // ----------------------------------------------------------------------------
 265 // soud manager
 266 // ----------------------------------------------------------------------------
 267
 268 void VM::initialize_sound(int rate, int samples)
 269 {
 270         // init sound manager
 271         event->initialize_sound(rate, samples);
 272
 273         // init sound gen
 274         opn->init(rate, 2000000, samples, 0, -8);
 275         pcm->init(rate, 4096);
 276 }
 277
 278 uint16* VM::create_sound(int* extra_frames)
 279 {
 280         return event->create_sound(extra_frames);
 281 }
 282
 283 int VM::sound_buffer_ptr()
 284 {
 285         return event->sound_buffer_ptr();
 286 }
 287
 288 // ----------------------------------------------------------------------------
 289 // user interface
 290 // ----------------------------------------------------------------------------
 291
 292 void VM::open_disk(int drv, _TCHAR* file_path, int offset)
 293 {
 294         fdc->open_disk(drv, file_path, offset);
 295 }
 296
 297 void VM::close_disk(int drv)
 298 {
 299         fdc->close_disk(drv);
 300 }
 301
 302 bool VM::disk_inserted(int drv)
 303 {
 304         return fdc->disk_inserted(drv);
 305 }
 306
 307 bool VM::now_skip()
 308 {
 309         return event->now_skip();
 310 }
 311
 312 void VM::update_config()
 313 {
 314         for(DEVICE* device = first_device; device; device = device->next_device) {
 315                 device->update_config();
 316         }
 317 }
 318
 319 #define STATE_VERSION   2
 320
 321 void VM::save_state(FILEIO* state_fio)
 322 {
 323         state_fio->FputUint32(STATE_VERSION);
 324
 325         for(DEVICE* device = first_device; device; device = device->next_device) {
 326                 device->save_state(state_fio);
 327         }
 328 }
 329
 330 bool VM::load_state(FILEIO* state_fio)
 331 {
 332         if(state_fio->FgetUint32() != STATE_VERSION) {
 333                 return false;
 334         }
 335         for(DEVICE* device = first_device; device; device = device->next_device) {
 336                 if(!device->load_state(state_fio)) {
 337                         return false;
 338                 }
 339         }
 340         return true;
 341 }
 342