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