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 BMJR_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 BMJR_MEMORY::reset()
 102 {
 103         touch_sound();
 104         memory_bank = 0;
 105         update_bank();
 106
 107         memset(color_table, 7, sizeof(color_table));
 108         char_color = 7;
 109         back_color = mp1710_enb = 0;
 110
 111         screen_mode = 0;
 112         screen_reversed = false;
 113
 114         drec_bit = drec_in = false;
 115
 116         key_column = 0;
 117         nmi_enb = break_pressed = false;
 118
 119         sound_sample = 0;
 120         sound_accum = 0;
 121         sound_clock = sound_mix_clock = get_current_clock();
 122 }
 123
 124 void BMJR_MEMORY::write_data8(uint32_t addr, uint32_t data)
 125 {
 126         if((addr & 0xfe00) == 0xee00) {
 127                 // EE00h - EFFFh
 128                 switch(addr & 0xffff) {
 129                 case 0xee40:
 130                         screen_reversed = ((data & 0x80) != 0);
 131                         break;
 132                 case 0xee80:
 133                         if(sound_sample != ((data >> 1) & 0x1f)) {
 134                                 touch_sound();
 135                                 sound_accum += (double)sound_sample * get_passed_usec(sound_clock);
 136                                 sound_clock = get_current_clock();
 137                                 sound_sample = (data >> 1) & 0x1f;
 138                         }
 139                         d_drec->write_signal(SIG_DATAREC_MIC, ~data, 0x01);
 140                         break;
 141                 case 0xeec0:
 142                         key_column = data & 0x0f;
 143                         nmi_enb = ((data & 0x80) != 0);
 144                         event_frame(); // update keyboard
 145                         break;
 146                 case 0xefd0:
 147                         // bit4: unknown (timer on/off)
 148                         memory_bank = data;
 149                         update_bank();
 150                         break;
 151                 case 0xefe0:
 152                         screen_mode = data;
 153                         break;
 154                 }
 155                 return;
 156         }
 157         if((addr & 0xf800) == 0xe800 && !(memory_bank & 2)) {
 158                 // E800h - EFFFh
 159                 switch(addr & 0xffff) {
 160                 case 0xe800:
 161                 case 0xe801:
 162                 case 0xe802:
 163                 case 0xe803:
 164                         d_pia->write_io8(addr, data);
 165                         break;
 166                 case 0xe890:
 167                         // bit0-3: fore color
 168                         // bit4-7: back color
 169                         char_color = data;
 170                         break;
 171                 case 0xe891:
 172                         back_color = data;
 173                         break;
 174                 case 0xe892:
 175                         mp1710_enb = data;
 176                         break;
 177                 }
 178                 return;
 179         }
 180         if(addr >= 0x100 && addr < 0x400) {
 181                 color_table[addr - 0x100] = char_color;
 182         }
 183         wbank[(addr >> 11) & 0x1f][addr & 0x7ff] = data;
 184 }
 185
 186 uint32_t BMJR_MEMORY::read_data8(uint32_t addr)
 187 {
 188         if((addr & 0xfe00) == 0xee00) {
 189                 // EE00h - EFFFh
 190                 switch(addr & 0xffff) {
 191                 case 0xee00:
 192                 case 0xee20:
 193                         d_drec->write_signal(SIG_DATAREC_REMOTE, addr, 0x20);
 194                         return 0x01;
 195                 case 0xee80:
 196                         return drec_bit ? 0x80 : 0;
 197                 case 0xeec0:
 198                         return key_data;
 199                 case 0xef00:
 200                         // unknown (timer)
 201                         break;
 202                 case 0xef80:
 203                         if(break_pressed) {
 204                                 break_pressed = false;
 205                                 return 0x80;
 206                         }
 207                         return 0x00;
 208                 case 0xefd0:
 209                         return memory_bank;
 210                 }
 211                 return 0xff;
 212         }
 213         if((addr & 0xf800) == 0xe800 && !(memory_bank & 2)) {
 214                 // E800h - EFFFh
 215                 switch(addr & 0xffff) {
 216                 case 0xe800:
 217                 case 0xe801:
 218                 case 0xe802:
 219                 case 0xe803:
 220                         return d_pia->read_io8(addr);
 221                 case 0xe890:
 222                         return char_color;
 223                 case 0xe891:
 224                         return back_color;
 225                 case 0xe892:
 226                         return mp1710_enb;
 227                 }
 228                 return 0xff;
 229         }
 230         return rbank[(addr >> 11) & 0x1f][addr & 0x7ff];
 231 }
 232
 233 void BMJR_MEMORY::write_signal(int id, uint32_t data, uint32_t mask)
 234 {
 235         if(id == SIG_MEMORY_DATAREC_EAR) {
 236                 bool new_in = ((data & mask) != 0);
 237                 if(!drec_in && new_in) {
 238                         // L -> H
 239                         drec_clock = get_current_clock();
 240                 } else if(drec_in && !new_in) {
 241                         // H -> L
 242                         int usec = (int)get_passed_usec(drec_clock);
 243                         if(usec > 417 - 42 && usec < 417 + 42) {
 244                                 drec_bit = false;       // 1200Hz
 245                         } else if(usec > 208 - 21 && usec < 208 + 21) {
 246                                 drec_bit = true;        // 2400Hz
 247                         }
 248                 }
 249                 drec_in = new_in;
 250         }
 251 }
 252
 253 void BMJR_MEMORY::event_frame()
 254 {
 255         key_data = 0xff;
 256         if(key_column < 13) {
 257                 if(key_stat[key_table[key_column][0]]) key_data &= ~0x01;
 258                 if(key_stat[key_table[key_column][1]]) key_data &= ~0x02;
 259                 if(key_stat[key_table[key_column][2]]) key_data &= ~0x04;
 260                 if(key_stat[key_table[key_column][3]]) key_data &= ~0x08;
 261         }
 262
 263 #if defined(_USE_QT)
 264         // If same as bm2, not effect below keys at Qt version.
 265         if(key_stat[VK_LCONTROL]) key_data &= ~0x10; // 英数     -> LCTRL
 266         if(key_stat[VK_LSHIFT  ]) key_data &= ~0x20; // 英記号   -> L-SHIFT
 267         if(key_stat[VK_RWIN    ]) key_data &= ~0x40; // カナ記号 -> R-Win
 268         if(key_stat[VK_KANA    ]) key_data &= ~0x80; // カナ     -> カタカナひらがな
 269 #else
 270         // this is same as "日立ベーシックマスターJr.(MB-6885)エミュレータ bm2"
 271         if(key_stat[0xa2]) key_data &= ~0x10; // 英数     -> L-CTRL
 272         if(key_stat[0xa0]) key_data &= ~0x20; // 英記号   -> L-SHIFT
 273         if(key_stat[0xa1]) key_data &= ~0x40; // カナ記号 -> R-SHIFT
 274         if(key_stat[0xa3]) key_data &= ~0x80; // カナ     -> R-CTRL
 275 #endif
 276 }
 277
 278 void BMJR_MEMORY::key_down(int code)
 279 {
 280         // pause -> break
 281         if(code == 0x13) {
 282                 if(nmi_enb) {
 283                         d_cpu->write_signal(SIG_CPU_NMI, 1, 1);
 284                 }
 285                 break_pressed = true;
 286         }
 287 }
 288
 289 void BMJR_MEMORY::update_bank()
 290 {
 291         if(memory_bank & 1) {
 292                 SET_BANK(0xb000, 0xdfff, ram + 0xb000, ram + 0xb000);
 293         } else {
 294                 SET_BANK(0xb000, 0xdfff, wdmy, basic);
 295         }
 296         if(memory_bank & 2) {
 297                 SET_BANK(0xe000, 0xefff, ram + 0xe000, ram + 0xe000);
 298         } else {
 299                 SET_BANK(0xe000, 0xe7ff, wdmy, printer);
 300                 SET_BANK(0xe800, 0xefff, wdmy, rdmy);   // memory mapped i/o
 301         }
 302         if(memory_bank & 4) {
 303                 SET_BANK(0xf000, 0xffff, ram + 0xf000, ram + 0xf000);
 304         } else {
 305                 SET_BANK(0xf000, 0xffff, wdmy, monitor);
 306         }
 307 }
 308
 309 void BMJR_MEMORY::mix(int32_t* buffer, int cnt)
 310 {
 311         int32_t volume = 0;
 312         if(get_passed_clock(sound_mix_clock) != 0) {
 313                 sound_accum += (double)sound_sample * get_passed_usec(sound_clock);
 314                 volume = (int32_t)(SOUND_VOLUME * sound_accum / (31.0 * get_passed_usec(sound_mix_clock)));
 315         }
 316         sound_accum = 0;
 317         sound_clock = sound_mix_clock = get_current_clock();
 318
 319         int32_t vol_l = apply_volume(volume, volume_l);
 320         int32_t vol_r = apply_volume(volume, volume_r);
 321
 322         for(int i = 0; i < cnt; i++) {
 323                 *buffer++ += vol_l; // L
 324                 *buffer++ += vol_r; // R
 325         }
 326 }
 327
 328 void BMJR_MEMORY::set_volume(int ch, int decibel_l, int decibel_r)
 329 {
 330         volume_l = decibel_to_volume(decibel_l);
 331         volume_r = decibel_to_volume(decibel_r);
 332 }
 333
 334 void BMJR_MEMORY::draw_screen()
 335 {
 336         if(!(screen_mode & 0x80)) {
 337                 // text
 338                 scrntype_t fore = palette_pc[screen_reversed ? 0 : 7];
 339                 scrntype_t back = palette_pc[screen_reversed ? 7 : 0];
 340                 int taddr = 0x100;
 341
 342                 for(int y = 0, yy = 0; y < 24; y++, yy += 8) {
 343                         for(int x = 0, xx = 0; x < 32; x++, xx += 8) {
 344                                 if(mp1710_enb & 1) {
 345                                         uint8_t color = color_table[taddr];
 346                                         if(screen_reversed) {
 347                                                 color = (color >> 4) | (color << 4);
 348                                         }
 349                                         fore = palette_pc[(color     ) & 7];
 350                                         back = palette_pc[(color >> 4) & 7];
 351                                 }
 352                                 int code = ram[taddr] << 3;
 353                                 for(int l = 0; l < 8; l++) {
 354                                         scrntype_t* dest = emu->get_screen_buffer(yy + l) + xx;
 355                                         uint8_t pat = font[code + l];
 356                                         dest[0] = (pat & 0x80) ? fore : back;
 357                                         dest[1] = (pat & 0x40) ? fore : back;
 358                                         dest[2] = (pat & 0x20) ? fore : back;
 359                                         dest[3] = (pat & 0x10) ? fore : back;
 360                                         dest[4] = (pat & 0x08) ? fore : back;
 361                                         dest[5] = (pat & 0x04) ? fore : back;
 362                                         dest[6] = (pat & 0x02) ? fore : back;
 363                                         dest[7] = (pat & 0x01) ? fore : back;
 364                                 }
 365                                 taddr++;
 366                         }
 367                 }
 368         } else {
 369                 // graph
 370                 scrntype_t fore = palette_pc[screen_reversed ? 0 : 7];
 371                 scrntype_t back = palette_pc[screen_reversed ? 7 : 0];
 372                 int taddr = 0x100;
 373                 int gaddr = 0x900 + ((screen_mode & 0x0f) << 9);
 374
 375                 for(int y = 0, yy = 0; y < 24; y++, yy += 8) {
 376                         for(int x = 0, xx = 0; x < 32; x++, xx += 8) {
 377                                 if(mp1710_enb & 1) {
 378                                         uint8_t color = color_table[taddr];
 379                                         if(screen_reversed) {
 380                                                 color = (color >> 4) | (color << 4);
 381                                         }
 382                                         fore = palette_pc[(color     ) & 7];
 383                                         back = palette_pc[(color >> 4) & 7];
 384                                 }
 385                                 for(int l = 0, ll = 0; l < 8; l++, ll += 32) {
 386                                         scrntype_t* dest = emu->get_screen_buffer(yy + l) + xx;
 387                                         uint8_t pat = ram[gaddr + ll];
 388                                         dest[0] = (pat & 0x80) ? fore : back;
 389                                         dest[1] = (pat & 0x40) ? fore : back;
 390                                         dest[2] = (pat & 0x20) ? fore : back;
 391                                         dest[3] = (pat & 0x10) ? fore : back;
 392                                         dest[4] = (pat & 0x08) ? fore : back;
 393                                         dest[5] = (pat & 0x04) ? fore : back;
 394                                         dest[6] = (pat & 0x02) ? fore : back;
 395                                         dest[7] = (pat & 0x01) ? fore : back;
 396                                 }
 397                                 taddr++;
 398                                 gaddr++;
 399                         }
 400                         gaddr += 32 * 7;
 401                 }
 402         }
 403 //      emu->screen_skip_line(false);
 404 }
 405
 406 #define STATE_VERSION   2
 407
 408 bool BMJR_MEMORY::process_state(FILEIO* state_fio, bool loading)
 409 {
 410         if(!state_fio->StateCheckUint32(STATE_VERSION)) {
 411                 return false;
 412         }
 413         if(!state_fio->StateCheckInt32(this_device_id)) {
 414                 return false;
 415         }
 416         state_fio->StateBuffer(ram, sizeof(ram), 1);
 417         state_fio->StateUint8(memory_bank);
 418         state_fio->StateBuffer(color_table, sizeof(color_table), 1);
 419         state_fio->StateUint8(char_color);
 420         state_fio->StateUint8(back_color);
 421         state_fio->StateUint8(mp1710_enb);
 422         state_fio->StateUint8(screen_mode);
 423         state_fio->StateBool(screen_reversed);
 424         state_fio->StateBool(drec_bit);
 425         state_fio->StateBool(drec_in);
 426         state_fio->StateUint32(drec_clock);
 427         state_fio->StateUint8(key_column);
 428         state_fio->StateUint8(key_data);
 429         state_fio->StateBool(nmi_enb);
 430         state_fio->StateBool(break_pressed);
 431         state_fio->StateUint8(sound_sample);
 432         state_fio->StateDouble(sound_accum);
 433         state_fio->StateUint32(sound_clock);
 434         state_fio->StateUint32(sound_mix_clock);
 435
 436         // post process
 437         if(loading) {
 438                 update_bank();
 439         }
 440         return true;
 441 }