source/src/vm/pc100/pc100.cpp

   1 /*
   2         NEC PC-100 Emulator 'ePC-100'
   3
   4         Author : Takeda.Toshiya
   5         Date   : 2008.07.12 -
   6
   7         [ virtual machine ]
   8 */
   9
  10 #include "pc100.h"
  11 #include "../../emu.h"
  12 #include "../device.h"
  13 #include "../event.h"
  14
  15 #include "../and.h"
  16 #include "../beep.h"
  17 #include "../disk.h"
  18 #include "../i8251.h"
  19 #include "../i8255.h"
  20 #include "../i8259.h"
  21 #include "../i286.h"
  22 #include "../io.h"
  23 #include "../memory.h"
  24 #include "../msm58321.h"
  25 #include "../pcm1bit.h"
  26 #include "../upd765a.h"
  27
  28 #ifdef USE_DEBUGGER
  29 #include "../debugger.h"
  30 #endif
  31
  32 #include "crtc.h"
  33 #include "ioctrl.h"
  34 #include "kanji.h"
  35
  36 // ----------------------------------------------------------------------------
  37 // initialize
  38 // ----------------------------------------------------------------------------
  39
  40 VM::VM(EMU* parent_emu) : emu(parent_emu)
  41 {
  42         // create devices
  43         first_device = last_device = NULL;
  44         dummy = new DEVICE(this, emu);  // must be 1st device
  45         event = new EVENT(this, emu);   // must be 2nd device
  46
  47         and = new AND(this, emu);
  48         beep = new BEEP(this, emu);
  49         sio = new I8251(this, emu);
  50         pio0 = new I8255(this, emu);
  51         pio1 = new I8255(this, emu);
  52         pic = new I8259(this, emu);
  53         cpu = new I286(this, emu);
  54         io = new IO(this, emu);
  55         memory = new MEMORY(this, emu);
  56         rtc = new MSM58321(this, emu);
  57         pcm = new PCM1BIT(this, emu);
  58         fdc = new UPD765A(this, emu);
  59
  60         crtc = new CRTC(this, emu);
  61         ioctrl = new IOCTRL(this, emu);
  62         kanji = new KANJI(this, emu);
  63
  64         // set contexts
  65         event->set_context_cpu(cpu);
  66         event->set_context_sound(beep);
  67         event->set_context_sound(pcm);
  68
  69         and->set_context_out(cpu, SIG_CPU_NMI, 1);
  70         and->set_mask(SIG_AND_BIT_0 | SIG_AND_BIT_1);
  71         sio->set_context_rxrdy(pic, SIG_I8259_IR1, 1);
  72         pio0->set_context_port_a(rtc, SIG_MSM58321_READ, 1, 0);
  73         pio0->set_context_port_a(rtc, SIG_MSM58321_WRITE, 2, 0);
  74         pio0->set_context_port_a(rtc, SIG_MSM58321_ADDR_WRITE, 4, 0);
  75         pio0->set_context_port_c(rtc, SIG_MSM58321_DATA, 0x0f, 0);
  76         pio1->set_context_port_a(crtc, SIG_CRTC_BITMASK_LOW, 0xff, 0);
  77         pio1->set_context_port_b(crtc, SIG_CRTC_BITMASK_HIGH, 0xff, 0);
  78         pio1->set_context_port_c(crtc, SIG_CRTC_VRAM_PLANE, 0x3f, 0);
  79         pio1->set_context_port_c(and, SIG_AND_BIT_0, 0x80, 0);
  80         pio1->set_context_port_c(ioctrl, SIG_IOCTRL_RESET, 0x40, 0);
  81         pic->set_context_cpu(cpu);
  82         rtc->set_context_data(pio0, SIG_I8255_PORT_C, 0x0f, 0);
  83         rtc->set_context_busy(pio0, SIG_I8255_PORT_C, 0x10);
  84         fdc->set_context_irq(cpu, SIG_CPU_NMI, 1);
  85         fdc->set_context_drq(and, SIG_AND_BIT_1, 1);
  86
  87         crtc->set_context_pic(pic);
  88         ioctrl->set_context_pic(pic);
  89         ioctrl->set_context_fdc(fdc);
  90         ioctrl->set_context_beep(beep);
  91         ioctrl->set_context_pcm(pcm);
  92
  93         // cpu bus
  94         cpu->set_context_mem(memory);
  95         cpu->set_context_io(io);
  96         cpu->set_context_intr(pic);
  97 #ifdef USE_DEBUGGER
  98         cpu->set_context_debugger(new DEBUGGER(this, emu));
  99 #endif
 100
 101         // memory bus
 102         memset(ram, 0, sizeof(ram));
 103         memset(ipl, 0xff, sizeof(ipl));
 104
 105         memory->read_bios(_T("IPL.ROM"), ipl, sizeof(ipl));
 106
 107         memory->set_memory_rw(0x00000, 0xbffff, ram);
 108         memory->set_memory_mapped_io_rw(0xc0000, 0xdffff, crtc);
 109         memory->set_memory_r(0xf8000, 0xfffff, ipl);
 110
 111         // i/o bus
 112         io->set_iomap_alias_rw(0x00, pic, 0);
 113         io->set_iomap_alias_rw(0x02, pic, 1);
 114 //      io->set_iomap_alias_rw(0x04, dma, 0);
 115 //      io->set_iomap_alias_rw(0x06, dma, 1);
 116         io->set_iomap_alias_r(0x08, fdc, 0);
 117         io->set_iomap_alias_rw(0x0a, fdc, 1);
 118         io->set_iomap_alias_rw(0x10, pio0, 0);
 119         io->set_iomap_alias_rw(0x12, pio0, 1);
 120         io->set_iomap_alias_rw(0x14, pio0, 2);
 121         io->set_iomap_alias_rw(0x16, pio0, 3);
 122         io->set_iomap_alias_rw(0x18, pio1, 0);
 123         io->set_iomap_alias_rw(0x1a, pio1, 1);
 124         io->set_iomap_alias_rw(0x1c, pio1, 2);
 125         io->set_iomap_alias_rw(0x1e, pio1, 3);
 126         io->set_iomap_single_r(0x20, ioctrl);
 127         io->set_iomap_single_rw(0x22, ioctrl);
 128         io->set_iomap_single_w(0x24, ioctrl);
 129         io->set_iomap_alias_rw(0x28, sio, 0);
 130         io->set_iomap_alias_rw(0x2a, sio, 1);
 131         io->set_iomap_single_rw(0x30, crtc);
 132         io->set_iomap_single_rw(0x38, crtc);
 133         io->set_iomap_single_rw(0x3a, crtc);
 134         io->set_iomap_single_rw(0x3c, crtc);
 135         io->set_iomap_single_rw(0x3e, crtc);
 136         for(int i = 0x40; i < 0x62; i++) {
 137                 io->set_iomap_single_rw(i, crtc);
 138         }
 139         io->set_iomap_single_rw(0x80, kanji);
 140         io->set_iomap_single_rw(0x81, kanji);
 141         io->set_iomap_single_w(0x84, kanji);
 142         io->set_iomap_single_w(0x86, kanji);
 143
 144         // initialize all devices
 145         for(DEVICE* device = first_device; device; device = device->next_device) {
 146                 device->initialize();
 147         }
 148         for(int i = 0; i < 4; i++) {
 149                 fdc->set_drive_type(i, DRIVE_TYPE_2D);
 150         }
 151 }
 152
 153 VM::~VM()
 154 {
 155         // delete all devices
 156         for(DEVICE* device = first_device; device;) {
 157                 DEVICE *next_device = device->next_device;
 158                 device->release();
 159                 delete device;
 160                 device = next_device;
 161         }
 162 }
 163
 164 DEVICE* VM::get_device(int id)
 165 {
 166         for(DEVICE* device = first_device; device; device = device->next_device) {
 167                 if(device->this_device_id == id) {
 168                         return device;
 169                 }
 170         }
 171         return NULL;
 172 }
 173
 174 // ----------------------------------------------------------------------------
 175 // drive virtual machine
 176 // ----------------------------------------------------------------------------
 177
 178 void VM::reset()
 179 {
 180         // reset all devices
 181         for(DEVICE* device = first_device; device; device = device->next_device) {
 182                 device->reset();
 183         }
 184 }
 185
 186 void VM::run()
 187 {
 188         event->drive();
 189 }
 190
 191 // ----------------------------------------------------------------------------
 192 // debugger
 193 // ----------------------------------------------------------------------------
 194
 195 #ifdef USE_DEBUGGER
 196 DEVICE *VM::get_cpu(int index)
 197 {
 198         if(index == 0) {
 199                 return cpu;
 200         }
 201         return NULL;
 202 }
 203 #endif
 204
 205 // ----------------------------------------------------------------------------
 206 // draw screen
 207 // ----------------------------------------------------------------------------
 208
 209 void VM::draw_screen()
 210 {
 211         crtc->draw_screen();
 212 }
 213
 214 int VM::access_lamp()
 215 {
 216         uint32 status = fdc->read_signal(0);
 217         return (status & (1 | 4)) ? 1 : (status & (2 | 8)) ? 2 : 0;
 218 }
 219
 220 // ----------------------------------------------------------------------------
 221 // soud manager
 222 // ----------------------------------------------------------------------------
 223
 224 void VM::initialize_sound(int rate, int samples)
 225 {
 226         // init sound manager
 227         event->initialize_sound(rate, samples);
 228
 229         // init sound gen
 230         beep->init(rate, 2400, 8000);
 231         pcm->init(rate, 8000);
 232 }
 233
 234 uint16* VM::create_sound(int* extra_frames)
 235 {
 236         return event->create_sound(extra_frames);
 237 }
 238
 239 int VM::sound_buffer_ptr()
 240 {
 241         return event->sound_buffer_ptr();
 242 }
 243
 244 // ----------------------------------------------------------------------------
 245 // notify key
 246 // ----------------------------------------------------------------------------
 247
 248 void VM::key_down(int code, bool repeat)
 249 {
 250         ioctrl->key_down(code);
 251 }
 252
 253 void VM::key_up(int code)
 254 {
 255         ioctrl->key_up(code);
 256 }
 257
 258 // ----------------------------------------------------------------------------
 259 // user interface
 260 // ----------------------------------------------------------------------------
 261
 262 void VM::open_disk(int drv, const _TCHAR* file_path, int bank)
 263 {
 264         fdc->open_disk(drv, file_path, bank);
 265 }
 266
 267 void VM::close_disk(int drv)
 268 {
 269         fdc->close_disk(drv);
 270 }
 271
 272 bool VM::disk_inserted(int drv)
 273 {
 274         return fdc->disk_inserted(drv);
 275 }
 276
 277 void VM::set_disk_protected(int drv, bool value)
 278 {
 279         fdc->set_disk_protected(drv, value);
 280 }
 281
 282 bool VM::get_disk_protected(int drv)
 283 {
 284         return fdc->get_disk_protected(drv);
 285 }
 286
 287 bool VM::now_skip()
 288 {
 289         return event->now_skip();
 290 }
 291
 292 void VM::update_config()
 293 {
 294         for(DEVICE* device = first_device; device; device = device->next_device) {
 295                 device->update_config();
 296         }
 297 }
 298
 299 #define STATE_VERSION   1
 300
 301 void VM::save_state(FILEIO* state_fio)
 302 {
 303         state_fio->FputUint32(STATE_VERSION);
 304
 305         for(DEVICE* device = first_device; device; device = device->next_device) {
 306                 device->save_state(state_fio);
 307         }
 308         state_fio->Fwrite(ram, sizeof(ram), 1);
 309 }
 310
 311 bool VM::load_state(FILEIO* state_fio)
 312 {
 313         if(state_fio->FgetUint32() != STATE_VERSION) {
 314                 return false;
 315         }
 316         for(DEVICE* device = first_device; device; device = device->next_device) {
 317                 if(!device->load_state(state_fio)) {
 318                         return false;
 319                 }
 320         }
 321         state_fio->Fread(ram, sizeof(ram), 1);
 322         return true;
 323 }
 324