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 // ----------------------------------------------------------------------------
  44 // initialize
  45 // ----------------------------------------------------------------------------
  46
  47 VM::VM(EMU* parent_emu) : emu(parent_emu)
  48 {
  49         // create devices
  50         first_device = last_device = NULL;
  51         dummy = new DEVICE(this, emu);  // must be 1st device
  52         event = new EVENT(this, emu);   // must be 2nd device
  53
  54         cpu = new I286(this, emu);
  55         pit = new I8253(this, emu);
  56         pio0 = new I8255(this, emu);
  57         pic = new I8259(this, emu);
  58         io = new IO(this, emu);
  59         fdc = new MB8877(this, emu);
  60         pcm = new PCM1BIT(this, emu);
  61         rtc = new RP5C01(this, emu);    // RP-5C15
  62 //      sasi = new SASI(this, emu);
  63         dma = new UPD71071(this, emu);
  64         opn = new YM2203(this, emu);
  65         pio1 = new Z80PIO(this, emu);
  66         sio = new Z80SIO(this, emu);
  67
  68         crtc = new CRTC(this, emu);
  69         floppy = new FLOPPY(this, emu);
  70         joystick = new JOYSTICK(this, emu);
  71         keyboard = new KEYBOARD(this, emu);
  72         memory = new MEMORY(this, emu);
  73         mouse = new MOUSE(this, emu);
  74         rst = new RESET(this, emu);
  75         serial = new SERIAL(this, emu);
  76         sysport = new SYSPORT(this, emu);
  77
  78         // set contexts
  79         event->set_context_cpu(cpu);
  80         event->set_context_sound(opn);
  81         event->set_context_sound(pcm);
  82
  83         pit->set_constant_clock(0, 31250);
  84         pit->set_constant_clock(2, 31250);
  85         pit->set_context_ch0(pit, SIG_I8253_CLOCK_1, 1);
  86         pit->set_context_ch0(pic, SIG_I8259_CHIP0 | SIG_I8259_IR0, 1);
  87         pit->set_context_ch1(pic, SIG_I8259_CHIP0 | SIG_I8259_IR6, 1);
  88         pit->set_context_ch2(pic, SIG_I8259_CHIP1 | SIG_I8259_IR0, 1);
  89         pio0->set_context_port_c(rst, SIG_RESET_CONTROL, 0xff, 0);
  90         pio0->set_context_port_c(crtc, SIG_CRTC_MASK, 0x01, 0);
  91         pio0->set_context_port_c(pcm, SIG_PCM1BIT_SIGNAL, 0x04, 0);
  92         pic->set_context_cpu(cpu);
  93         fdc->set_context_drq(dma, SIG_UPD71071_CH1, 1);
  94         fdc->set_context_irq(pic, SIG_I8259_CHIP0 | SIG_I8259_IR5, 1);
  95         rtc->set_context_alarm(pic, SIG_I8259_CHIP1 | SIG_I8259_IR2, 1);
  96         rtc->set_context_pulse(opn, SIG_YM2203_PORT_B, 8);
  97 //      sasi->set_context_drq(dma, SIG_UPD71071_CH0, 1);
  98 //      sasi->set_context_irq(pic, SIG_I8259_CHIP0 | SIG_I8259_IR4, 1);
  99         dma->set_context_memory(memory);
 100 //      dma->set_context_ch0(sasi);
 101         dma->set_context_ch1(fdc);
 102         dma->set_context_tc(pic, SIG_I8259_CHIP0 | SIG_I8259_IR3, 1);
 103         opn->set_context_irq(pic, SIG_I8259_CHIP1 | SIG_I8259_IR7, 1);
 104         opn->set_context_port_a(crtc, SIG_CRTC_PALLETE, 0x04, 0);
 105         opn->set_context_port_a(mouse, SIG_MOUSE_SEL, 0x08, 0);
 106         pio1->set_context_port_a(crtc, SIG_CRTC_COLUMN_SIZE, 0x20, 0);
 107         pio1->set_context_port_a(keyboard, SIG_KEYBOARD_COLUMN, 0xff, 0);
 108         sio->set_context_intr(pic, SIG_I8259_CHIP0 | SIG_I8259_IR2);
 109         sio->set_context_dtr(1, mouse, SIG_MOUSE_DTR, 1);
 110
 111         crtc->set_context_pic(pic);
 112         crtc->set_context_pio(pio0);
 113         crtc->set_vram_ptr(memory->get_vram());
 114         crtc->set_tvram_ptr(memory->get_tvram());
 115         crtc->set_kanji_ptr(memory->get_kanji());
 116         crtc->set_pcg_ptr(memory->get_pcg());
 117         floppy->set_context_fdc(fdc);
 118         keyboard->set_context_pio0(pio0);
 119         keyboard->set_context_pio1(pio1);
 120         memory->set_context_crtc(crtc);
 121         mouse->set_context_sio(sio);
 122         serial->set_context_sio(sio);
 123         sysport->set_context_pit(pit);
 124         sysport->set_context_sio(sio);
 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(dma);
 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(0x70, 0x7f, dma);
 139         io->set_iomap_alias_rw(0x80, pic, I8259_ADDR_CHIP0 | 0);
 140         io->set_iomap_alias_rw(0x81, pic, I8259_ADDR_CHIP0 | 1);
 141         io->set_iomap_alias_rw(0x82, pic, I8259_ADDR_CHIP1 | 0);
 142         io->set_iomap_alias_rw(0x83, pic, I8259_ADDR_CHIP1 | 1);
 143         io->set_iomap_range_rw(0x8c, 0x8d, memory);
 144         io->set_iovalue_single_r(0x8e, 0xff);   // dipswitch
 145         io->set_flipflop_single_rw(0x8f, 0x00); // shut
 146         io->set_iomap_range_rw(0xa0, 0xa3, serial);
 147         for(uint32 p = 0xae; p <= 0x1fae; p += 0x100) {
 148                 io->set_iomap_single_w(p, crtc);
 149         }
 150 //      io->set_iomap_single_rw(0xaf, sasi);
 151         io->set_iomap_range_rw(0xb0, 0xb3, serial);
 152         io->set_iomap_single_r(0xbe, sysport);
 153         io->set_iomap_range_rw(0xc8, 0xc9, opn);
 154         io->set_iovalue_single_r(0xca, 0x7f);   // voice communication ???
 155         for(uint32 p = 0xcc; p <= 0xfcc; p += 0x100) {
 156                 io->set_iomap_alias_rw(p, rtc, p >> 8);
 157         }
 158         io->set_iomap_single_w(0xcd, serial);
 159         io->set_iomap_single_rw(0xce, memory);
 160         io->set_iomap_range_rw(0xd8, 0xdb, fdc);
 161         io->set_iomap_range_w(0xdc, 0xdf, floppy);
 162         io->set_iomap_range_rw(0xe0, 0xe3, pio0);
 163         io->set_iomap_range_rw(0xe4, 0xe7, pit);
 164         io->set_iomap_range_rw(0xe8, 0xeb, pio1);
 165         io->set_iomap_single_rw(0xef, joystick);
 166 //      io->set_iomap_range_w(0xf0, 0xf3, sysport);
 167         io->set_iomap_single_w(0x170, crtc);
 168         io->set_iomap_single_w(0x172, crtc);
 169         io->set_iomap_single_w(0x174, crtc);
 170         io->set_iomap_single_w(0x176, crtc);
 171         io->set_iomap_range_w(0x178, 0x17b, crtc);
 172         io->set_iomap_single_w(0x270, crtc);
 173         io->set_iomap_single_w(0x272, crtc);
 174         io->set_iomap_single_rw(0x274, memory);
 175
 176         // initialize all devices
 177         for(DEVICE* device = first_device; device; device = device->next_device) {
 178                 device->initialize();
 179         }
 180 }
 181
 182 VM::~VM()
 183 {
 184         // delete all devices
 185         for(DEVICE* device = first_device; device;) {
 186                 DEVICE *next_device = device->next_device;
 187                 device->release();
 188                 delete device;
 189                 device = next_device;
 190         }
 191 }
 192
 193 DEVICE* VM::get_device(int id)
 194 {
 195         for(DEVICE* device = first_device; device; device = device->next_device) {
 196                 if(device->this_device_id == id) {
 197                         return device;
 198                 }
 199         }
 200         return NULL;
 201 }
 202
 203 // ----------------------------------------------------------------------------
 204 // drive virtual machine
 205 // ----------------------------------------------------------------------------
 206
 207 void VM::reset()
 208 {
 209         // reset all devices
 210         for(DEVICE* device = first_device; device; device = device->next_device) {
 211                 device->reset();
 212         }
 213         // temporary fix...
 214         for(DEVICE* device = first_device; device; device = device->next_device) {
 215                 device->reset();
 216         }
 217
 218         // set initial port status
 219         pio0->write_signal(SIG_I8255_PORT_B, 0x7c, 0xff);
 220         opn->write_signal(SIG_YM2203_PORT_B, 0x37, 0xff);
 221 }
 222
 223 void VM::cpu_reset()
 224 {
 225         cpu->reset();
 226 }
 227
 228 void VM::run()
 229 {
 230         event->drive();
 231 }
 232
 233 // ----------------------------------------------------------------------------
 234 // debugger
 235 // ----------------------------------------------------------------------------
 236
 237 #ifdef USE_DEBUGGER
 238 DEVICE *VM::get_cpu(int index)
 239 {
 240         if(index == 0) {
 241                 return cpu;
 242         }
 243         return NULL;
 244 }
 245 #endif
 246
 247 // ----------------------------------------------------------------------------
 248 // draw screen
 249 // ----------------------------------------------------------------------------
 250
 251 void VM::draw_screen()
 252 {
 253         crtc->draw_screen();
 254 }
 255
 256 int VM::access_lamp()
 257 {
 258         uint32 status = fdc->read_signal(0);
 259         return (status & (1 | 4)) ? 1 : (status & (2 | 8)) ? 2 : 0;
 260 }
 261
 262 // ----------------------------------------------------------------------------
 263 // soud manager
 264 // ----------------------------------------------------------------------------
 265
 266 void VM::initialize_sound(int rate, int samples)
 267 {
 268         // init sound manager
 269         event->initialize_sound(rate, samples);
 270
 271         // init sound gen
 272         opn->init(rate, 2000000, samples, 0, -8);
 273         pcm->init(rate, 4096);
 274 }
 275
 276 uint16* VM::create_sound(int* extra_frames)
 277 {
 278         return event->create_sound(extra_frames);
 279 }
 280
 281 int VM::sound_buffer_ptr()
 282 {
 283         return event->sound_buffer_ptr();
 284 }
 285
 286 // ----------------------------------------------------------------------------
 287 // user interface
 288 // ----------------------------------------------------------------------------
 289
 290 void VM::open_disk(int drv, const _TCHAR* file_path, int bank)
 291 {
 292         fdc->open_disk(drv, file_path, bank);
 293 }
 294
 295 void VM::close_disk(int drv)
 296 {
 297         fdc->close_disk(drv);
 298 }
 299
 300 bool VM::disk_inserted(int drv)
 301 {
 302         return fdc->disk_inserted(drv);
 303 }
 304
 305 void VM::set_disk_protected(int drv, bool value)
 306 {
 307         fdc->set_disk_protected(drv, value);
 308 }
 309
 310 bool VM::get_disk_protected(int drv)
 311 {
 312         return fdc->get_disk_protected(drv);
 313 }
 314
 315 bool VM::now_skip()
 316 {
 317         return event->now_skip();
 318 }
 319
 320 void VM::update_config()
 321 {
 322         for(DEVICE* device = first_device; device; device = device->next_device) {
 323                 device->update_config();
 324         }
 325 }
 326
 327 #define STATE_VERSION   2
 328
 329 void VM::save_state(FILEIO* state_fio)
 330 {
 331         state_fio->FputUint32(STATE_VERSION);
 332
 333         for(DEVICE* device = first_device; device; device = device->next_device) {
 334                 device->save_state(state_fio);
 335         }
 336 }
 337
 338 bool VM::load_state(FILEIO* state_fio)
 339 {
 340         if(state_fio->FgetUint32() != STATE_VERSION) {
 341                 return false;
 342         }
 343         for(DEVICE* device = first_device; device; device = device->next_device) {
 344                 if(!device->load_state(state_fio)) {
 345                         return false;
 346                 }
 347         }
 348         return true;
 349 }
 350