source/src/vm/bmjr/memory.cpp

   1 /*
   2         HITACH BASIC Master Jr Emulator 'eBASICMasterJr'
   3
   4         Author : Takeda.Toshiya
   5         Date   : 2015.08.28-
   6
   7         [ memory bus ]
   8 */
   9
  10 #include "memory.h"
  11 #include "../datarec.h"
  12
  13 #define SET_BANK(s, e, w, r) { \
  14         int sb = (s) >> 11, eb = (e) >> 11; \
  15         for(int i = sb; i <= eb; i++) { \
  16                 if((w) == wdmy) { \
  17                         wbank[i] = wdmy; \
  18                 } else { \
  19                         wbank[i] = (w) + 0x800 * (i - sb); \
  20                 } \
  21                 if((r) == rdmy) { \
  22                         rbank[i] = rdmy; \
  23                 } else { \
  24                         rbank[i] = (r) + 0x800 * (i - sb); \
  25                 } \
  26         } \
  27 }
  28
  29 #define SOUND_VOLUME    8000
  30
  31 static const int key_table[13][4] = {
  32         {0x5a, 0x41, 0x51, 0x31},       //      'Z'     'A'     'Q'     '1'
  33         {0x58, 0x53, 0x57, 0x32},       //      'X'     'S'     'W'     '2'
  34         {0x43, 0x44, 0x45, 0x33},       //      'C'     'D'     'E'     '3'
  35         {0x56, 0x46, 0x52, 0x34},       //      'V'     'F'     'R'     '4'
  36         {0x42, 0x47, 0x54, 0x35},       //      'B'     'G'     'T'     '5'
  37         {0x4e, 0x48, 0x59, 0x36},       //      'N'     'H'     'Y'     '6'
  38         {0x4d, 0x4a, 0x55, 0x37},       //      'M'     'J'     'U'     '7'
  39         {0xbc, 0x4b, 0x49, 0x38},       //      ','     'K'     'I'     '8'
  40         {0xbe, 0x4c, 0x4f, 0x39},       //      '.'     'L'     'O'     '9'
  41         {0xbf, 0xbb, 0x50, 0x30},       //      '/'     ';'     'P'     '0'
  42         {0xe2, 0xba, 0xc0, 0xbd},       //      '_'     ':'     '@'     '-'
  43         {0x20, 0xdd, 0xdb, 0xde},       //      SPACE   ']'     '['     '^'
  44         {0x00, 0x0d, 0x2e, 0xdc},       //              RETURN  DEL     '\'
  45 };
  46
  47 void MEMORY::initialize()
  48 {
  49         // initialize memory
  50         memset(ram, 0, sizeof(ram));
  51         memset(basic, 0xff, sizeof(basic));
  52         memset(printer, 0xff, sizeof(printer));
  53         memset(monitor, 0xff, sizeof(monitor));
  54         memset(rdmy, 0xff, sizeof(rdmy));
  55
  56         // load rom images
  57         FILEIO* fio = new FILEIO();
  58         if(fio->Fopen(create_local_path(_T("BASIC.ROM")), FILEIO_READ_BINARY)) {
  59                 fio->Fread(basic, sizeof(basic), 1);
  60                 fio->Fclose();
  61         } else if(fio->Fopen(create_local_path(_T("BAS.ROM")), FILEIO_READ_BINARY)) {
  62                 fio->Fread(basic, sizeof(basic), 1);
  63                 fio->Fclose();
  64         }
  65         if(fio->Fopen(create_local_path(_T("PRINTER.ROM")), FILEIO_READ_BINARY)) {
  66                 fio->Fread(printer, sizeof(printer), 1);
  67                 fio->Fclose();
  68         } else if(fio->Fopen(create_local_path(_T("PRT.ROM")), FILEIO_READ_BINARY)) {
  69                 fio->Fread(printer, sizeof(printer), 1);
  70                 fio->Fclose();
  71         }
  72         if(fio->Fopen(create_local_path(_T("MONITOR.ROM")), FILEIO_READ_BINARY)) {
  73                 fio->Fread(monitor, sizeof(monitor), 1);
  74                 fio->Fclose();
  75         } else if(fio->Fopen(create_local_path(_T("MON.ROM")), FILEIO_READ_BINARY)) {
  76                 fio->Fread(monitor, sizeof(monitor), 1);
  77                 fio->Fclose();
  78         }
  79         if(fio->Fopen(create_local_path(_T("FONT.ROM")), FILEIO_READ_BINARY)) {
  80                 fio->Fread(font, sizeof(font), 1);
  81                 fio->Fclose();
  82         }
  83         delete fio;
  84
  85         SET_BANK(0x0000, 0xafff, ram,  ram);
  86         memory_bank = 0;
  87         update_bank();
  88
  89         // initialize inputs
  90         key_stat = emu->get_key_buffer();
  91
  92         // initialize display
  93         for(int i = 0; i < 8; i++) {
  94                 palette_pc[i] = RGB_COLOR((i & 2) ? 0xff : 0, (i & 4) ? 0xff : 0, (i & 1) ? 0xff : 0);
  95         }
  96
  97         // register event
  98         register_frame_event(this);
  99 }
 100
 101 void MEMORY::reset()
 102 {
 103         memory_bank = 0;
 104         update_bank();
 105
 106         memset(color_table, 7, sizeof(color_table));
 107         char_color = 7;
 108         back_color = mp1710_enb = 0;
 109
 110         screen_mode = 0;
 111         screen_reversed = false;
 112
 113         drec_in = false;
 114
 115         key_column = 0;
 116         nmi_enb = break_pressed = false;
 117
 118         sound_sample = 0;
 119         sound_accum = 0;
 120         sound_clock = sound_mix_clock = get_current_clock();
 121 }
 122
 123 void MEMORY::write_data8(uint32_t addr, uint32_t data)
 124 {
 125         if((addr & 0xfe00) == 0xee00) {
 126                 // EE00h - EFFFh
 127                 switch(addr & 0xffff) {
 128                 case 0xee40:
 129                         screen_reversed = ((data & 0x80) != 0);
 130                         break;
 131                 case 0xee80:
 132                         if(sound_sample != ((data >> 1) & 0x1f)) {
 133                                 sound_accum += (double)sound_sample * get_passed_usec(sound_clock);
 134                                 sound_clock = get_current_clock();
 135                                 sound_sample = (data >> 1) & 0x1f;
 136                         }
 137                         d_drec->write_signal(SIG_DATAREC_MIC, ~data, 0x01);
 138                         break;
 139                 case 0xeec0:
 140                         key_column = data & 0x0f;
 141                         nmi_enb = ((data & 0x80) != 0);
 142                         event_frame(); // update keyboard
 143                         break;
 144                 case 0xefd0:
 145                         // bit4: unknown (timer on/off)
 146                         memory_bank = data;
 147                         update_bank();
 148                         break;
 149                 case 0xefe0:
 150                         screen_mode = data;
 151                         break;
 152                 }
 153                 return;
 154         }
 155         if((addr & 0xf800) == 0xe800 && !(memory_bank & 2)) {
 156                 // E800h - EDFFh
 157                 switch(addr & 0xffff) {
 158                 case 0xe800:
 159                 case 0xe801:
 160                 case 0xe802:
 161                 case 0xe803:
 162                         d_pia->write_io8(addr, data);
 163                         break;
 164                 case 0xe890:
 165                         // bit0-3: fore color
 166                         // bit4-7: back color
 167                         char_color = data;
 168                         break;
 169                 case 0xe891:
 170                         back_color = data;
 171                         break;
 172                 case 0xe892:
 173                         mp1710_enb = data;
 174                         break;
 175                 }
 176                 return;
 177         }
 178         if(addr >= 0x100 && addr < 0x400) {
 179                 color_table[addr - 0x100] = char_color;
 180         }
 181         wbank[(addr >> 11) & 0x1f][addr & 0x7ff] = data;
 182 }
 183
 184 uint32_t MEMORY::read_data8(uint32_t addr)
 185 {
 186         if((addr & 0xfe00) == 0xee00) {
 187                 // EE00h - EFFFh
 188                 switch(addr & 0xffff) {
 189                 case 0xee00:
 190                 case 0xee20:
 191                         d_drec->write_signal(SIG_DATAREC_REMOTE, addr, 0x20);
 192 #if defined(USE_SOUND_FILES)
 193                         if(addr & 0x20) {
 194                                 d_drec->write_signal(SIG_SOUNDER_ADD + DATAREC_SNDFILE_RELAY_ON, 1, 1);
 195                         } else {
 196                                 d_drec->write_signal(SIG_SOUNDER_ADD + DATAREC_SNDFILE_RELAY_OFF, 1, 1);
 197                         }
 198 #endif
 199                         return 0x01;
 200                 case 0xee80:
 201                         return drec_in ? 0x80 : 0;
 202                 case 0xeec0:
 203                         return key_data;
 204                 case 0xef00:
 205                         // unknown (timer)
 206                         break;
 207                 case 0xef80:
 208                         if(break_pressed) {
 209                                 break_pressed = false;
 210                                 return 0x80;
 211                         }
 212                         return 0x00;
 213                 case 0xefd0:
 214                         return memory_bank;
 215                 }
 216                 return 0xff;
 217         }
 218         if((addr & 0xf800) == 0xe800 && !(memory_bank & 2)) {
 219                 // E800h - EDFFh
 220                 switch(addr & 0xffff) {
 221                 case 0xe800:
 222                 case 0xe801:
 223                 case 0xe802:
 224                 case 0xe803:
 225                         return d_pia->read_io8(addr);
 226                 case 0xe890:
 227                         return char_color;
 228                 case 0xe891:
 229                         return back_color;
 230                 case 0xe892:
 231                         return mp1710_enb;
 232                 }
 233                 return 0xff;
 234         }
 235         return rbank[(addr >> 11) & 0x1f][addr & 0x7ff];
 236 }
 237
 238 void MEMORY::write_signal(int id, uint32_t data, uint32_t mask)
 239 {
 240         if(id == SIG_MEMORY_DATAREC_EAR) {
 241                 drec_in = ((data & mask) != 0);
 242         }
 243 }
 244
 245 void MEMORY::event_frame()
 246 {
 247         key_data = 0xff;
 248         if(key_column < 13) {
 249                 if(key_stat[key_table[key_column][0]]) key_data &= ~0x01;
 250                 if(key_stat[key_table[key_column][1]]) key_data &= ~0x02;
 251                 if(key_stat[key_table[key_column][2]]) key_data &= ~0x04;
 252                 if(key_stat[key_table[key_column][3]]) key_data &= ~0x08;
 253         }
 254
 255 #if defined(_USE_QT)
 256         // If same as bm2, not effect below keys at Qt version.
 257         if(key_stat[VK_LCONTROL]) key_data &= ~0x10; // \89p\90\94     -> LCTRL
 258         if(key_stat[VK_LSHIFT]) key_data &= ~0x20; // \89p\8bL\8d\86   -> L-SHIFT
 259         if(key_stat[VK_RWIN]) key_data &= ~0x40; // \83J\83i\8bL\8d\86 -> R-Win
 260         if(key_stat[VK_KANA]) key_data &= ~0x80; // \83J\83i     -> \83J\83^\83J\83i\82Ð\82ç\82ª\82È
 261 #else
 262         // this is same as "\93ú\97§\83x\81[\83V\83b\83N\83}\83X\83^\81[Jr.(MB-6885)\83G\83~\83\85\83\8c\81[\83^ bm2"
 263         if(key_stat[0xa2]) key_data &= ~0x10; // \89p\90\94     -> L-CTRL
 264         if(key_stat[0xa0]) key_data &= ~0x20; // \89p\8bL\8d\86   -> L-SHIFT
 265         if(key_stat[0xa1]) key_data &= ~0x40; // \83J\83i\8bL\8d\86 -> R-SHIFT
 266         if(key_stat[0xa3]) key_data &= ~0x80; // \83J\83i     -> R-CTRL
 267 #endif
 268 }
 269
 270 void MEMORY::key_down(int code)
 271 {
 272         // pause -> break
 273         if(code == 0x13) {
 274                 if(nmi_enb) {
 275                         d_cpu->write_signal(SIG_CPU_NMI, 1, 1);
 276                 }
 277                 break_pressed = true;
 278         }
 279 }
 280
 281 void MEMORY::update_bank()
 282 {
 283         if(memory_bank & 1) {
 284                 SET_BANK(0xb000, 0xdfff, ram + 0xb000, ram + 0xb000);
 285         } else {
 286                 SET_BANK(0xb000, 0xdfff, wdmy, basic);
 287         }
 288         if(memory_bank & 2) {
 289                 SET_BANK(0xe000, 0xefff, ram + 0xe000, ram + 0xe000);
 290         } else {
 291                 SET_BANK(0xe000, 0xe7ff, wdmy, printer);
 292                 SET_BANK(0xe800, 0xefff, wdmy, rdmy);   // memory mapped i/o
 293         }
 294         if(memory_bank & 4) {
 295                 SET_BANK(0xf000, 0xffff, ram + 0xf000, ram + 0xf000);
 296         } else {
 297                 SET_BANK(0xf000, 0xffff, wdmy, monitor);
 298         }
 299 }
 300
 301 void MEMORY::mix(int32_t* buffer, int cnt)
 302 {
 303         int32_t volume = 0;
 304         if(get_passed_clock(sound_mix_clock) != 0) {
 305                 sound_accum += (double)sound_sample * get_passed_usec(sound_clock);
 306                 volume = (int32_t)(SOUND_VOLUME * sound_accum / (31.0 * get_passed_usec(sound_mix_clock)));
 307         }
 308         sound_accum = 0;
 309         sound_clock = sound_mix_clock = get_current_clock();
 310
 311         for(int i = 0; i < cnt; i++) {
 312                 *buffer++ = apply_volume(volume, volume_l); // L
 313                 *buffer++ = apply_volume(volume, volume_r); // R
 314         }
 315 }
 316
 317 void MEMORY::set_volume(int ch, int decibel_l, int decibel_r)
 318 {
 319         volume_l = decibel_to_volume(decibel_l);
 320         volume_r = decibel_to_volume(decibel_r);
 321 }
 322
 323 void MEMORY::draw_screen()
 324 {
 325         if(!(screen_mode & 0x80)) {
 326                 // text
 327                 scrntype_t fore = palette_pc[screen_reversed ? 0 : 7];
 328                 scrntype_t back = palette_pc[screen_reversed ? 7 : 0];
 329                 int taddr = 0x100;
 330
 331                 for(int y = 0, yy = 0; y < 24; y++, yy += 8) {
 332                         for(int x = 0, xx = 0; x < 32; x++, xx += 8) {
 333                                 if(mp1710_enb & 1) {
 334                                         uint8_t color = color_table[taddr];
 335                                         if(screen_reversed) {
 336                                                 color = (color >> 4) | (color << 4);
 337                                         }
 338                                         fore = palette_pc[(color     ) & 7];
 339                                         back = palette_pc[(color >> 4) & 7];
 340                                 }
 341                                 int code = ram[taddr] << 3;
 342                                 for(int l = 0; l < 8; l++) {
 343                                         scrntype_t* dest = emu->get_screen_buffer(yy + l) + xx;
 344                                         uint8_t pat = font[code + l];
 345                                         dest[0] = (pat & 0x80) ? fore : back;
 346                                         dest[1] = (pat & 0x40) ? fore : back;
 347                                         dest[2] = (pat & 0x20) ? fore : back;
 348                                         dest[3] = (pat & 0x10) ? fore : back;
 349                                         dest[4] = (pat & 0x08) ? fore : back;
 350                                         dest[5] = (pat & 0x04) ? fore : back;
 351                                         dest[6] = (pat & 0x02) ? fore : back;
 352                                         dest[7] = (pat & 0x01) ? fore : back;
 353                                 }
 354                                 taddr++;
 355                         }
 356                 }
 357         } else {
 358                 // graph
 359                 scrntype_t fore = palette_pc[screen_reversed ? 0 : 7];
 360                 scrntype_t back = palette_pc[screen_reversed ? 7 : 0];
 361                 int taddr = 0x100;
 362                 int gaddr = 0x900 + ((screen_mode & 0x0f) << 9);
 363
 364                 for(int y = 0, yy = 0; y < 24; y++, yy += 8) {
 365                         for(int x = 0, xx = 0; x < 32; x++, xx += 8) {
 366                                 if(mp1710_enb & 1) {
 367                                         uint8_t color = color_table[taddr];
 368                                         if(screen_reversed) {
 369                                                 color = (color >> 4) | (color << 4);
 370                                         }
 371                                         fore = palette_pc[(color     ) & 7];
 372                                         back = palette_pc[(color >> 4) & 7];
 373                                 }
 374                                 for(int l = 0, ll = 0; l < 8; l++, ll += 32) {
 375                                         scrntype_t* dest = emu->get_screen_buffer(yy + l) + xx;
 376                                         uint8_t pat = ram[gaddr + ll];
 377                                         dest[0] = (pat & 0x80) ? fore : back;
 378                                         dest[1] = (pat & 0x40) ? fore : back;
 379                                         dest[2] = (pat & 0x20) ? fore : back;
 380                                         dest[3] = (pat & 0x10) ? fore : back;
 381                                         dest[4] = (pat & 0x08) ? fore : back;
 382                                         dest[5] = (pat & 0x04) ? fore : back;
 383                                         dest[6] = (pat & 0x02) ? fore : back;
 384                                         dest[7] = (pat & 0x01) ? fore : back;
 385                                 }
 386                                 taddr++;
 387                                 gaddr++;
 388                         }
 389                         gaddr += 32 * 7;
 390                 }
 391         }
 392 //      emu->screen_skip_line(false);
 393 }
 394
 395 #define STATE_VERSION   1
 396
 397 void MEMORY::save_state(FILEIO* state_fio)
 398 {
 399         state_fio->FputUint32(STATE_VERSION);
 400         state_fio->FputInt32(this_device_id);
 401
 402         state_fio->Fwrite(ram, sizeof(ram), 1);
 403         state_fio->FputUint8(memory_bank);
 404         state_fio->Fwrite(color_table, sizeof(color_table), 1);
 405         state_fio->FputUint8(char_color);
 406         state_fio->FputUint8(back_color);
 407         state_fio->FputUint8(mp1710_enb);
 408         state_fio->FputUint8(screen_mode);
 409         state_fio->FputBool(screen_reversed);
 410         state_fio->FputBool(drec_in);
 411         state_fio->FputUint8(key_column);
 412         state_fio->FputUint8(key_data);
 413         state_fio->FputBool(nmi_enb);
 414         state_fio->FputBool(break_pressed);
 415         state_fio->FputUint8(sound_sample);
 416         state_fio->FputDouble(sound_accum);
 417         state_fio->FputUint32(sound_clock);
 418         state_fio->FputUint32(sound_mix_clock);
 419 }
 420
 421 bool MEMORY::load_state(FILEIO* state_fio)
 422 {
 423         if(state_fio->FgetUint32() != STATE_VERSION) {
 424                 return false;
 425         }
 426         if(state_fio->FgetInt32() != this_device_id) {
 427                 return false;
 428         }
 429         state_fio->Fread(ram, sizeof(ram), 1);
 430         memory_bank = state_fio->FgetUint8();
 431         state_fio->Fread(color_table, sizeof(color_table), 1);
 432         char_color = state_fio->FgetUint8();
 433         back_color = state_fio->FgetUint8();
 434         mp1710_enb = state_fio->FgetUint8();
 435         screen_mode = state_fio->FgetUint8();
 436         screen_reversed = state_fio->FgetBool();
 437         drec_in = state_fio->FgetBool();
 438         key_column = state_fio->FgetUint8();
 439         key_data = state_fio->FgetUint8();
 440         nmi_enb = state_fio->FgetBool();
 441         break_pressed = state_fio->FgetBool();
 442         sound_sample = state_fio->FgetUint8();
 443         sound_accum = state_fio->FgetDouble();
 444         sound_clock = state_fio->FgetUint32();
 445         sound_mix_clock = state_fio->FgetUint32();
 446
 447         // post process
 448         update_bank();
 449         return true;
 450 }
 451