source/src/vm/fm7/mb61vh010.cpp

   1 /*
   2  * FM77AV/FM16β ALU [mb61vh010.cpp]
   3  *  of Fujitsu MB61VH010/011
   4  *
   5  * Author: K.Ohta <whatisthis.sowhat _at_ gmail.com>
   6  * License: GPLv2
   7  * History:
   8  *   Mar 28, 2015 : Initial
   9  *
  10  */
  11
  12 #include "mb61vh010.h"
  13
  14
  15 MB61VH010::MB61VH010(VM *parent_vm, EMU *parent_emu) : DEVICE(parent_vm, parent_emu)
  16 {
  17         p_emu = parent_emu;
  18         p_vm = parent_vm;
  19 }
  20
  21 MB61VH010::~MB61VH010()
  22 {
  23 }
  24
  25 uint8 MB61VH010::do_read(uint32 addr, uint32 bank)
  26 {
  27         uint32 raddr;
  28
  29         if(((1 << bank) & multi_page) != 0) return 0xff;
  30         if(is_400line) {
  31                 if((addr & 0xffff) < 0x8000) {
  32                         raddr = (addr  & 0x7fff) | (0x8000 * bank);
  33                         return target->read_data8(raddr + DISPLAY_VRAM_DIRECT_ACCESS);
  34                 }
  35         } else {
  36                 raddr = (addr & 0x3fff) | (0x4000 * bank);
  37                 return target->read_data8(raddr + DISPLAY_VRAM_DIRECT_ACCESS);
  38         }
  39         return 0xff;
  40 }
  41
  42 uint8 MB61VH010::do_write(uint32 addr, uint32 bank, uint8 data)
  43 {
  44         uint32 raddr;
  45         uint8 readdata;
  46
  47         if(((1 << bank) & multi_page) != 0) return 0xff;
  48         if((command_reg & 0x40) != 0) { // Calculate before writing
  49                 readdata = do_read(addr, bank);
  50                 //readdata = data;
  51                 if((command_reg & 0x20) != 0) { // NAND
  52                         readdata = readdata & cmp_status_reg;
  53                         data = data & (~cmp_status_reg);
  54                 } else { // AND
  55                         readdata = readdata & (~cmp_status_reg);
  56                         data = data & cmp_status_reg;
  57                 }
  58                 readdata = readdata | data;
  59         } else {
  60                 readdata = data;
  61         }
  62         if(is_400line) {
  63                 if((addr & 0xffff) < 0x8000) {
  64                         //raddr = ((addr + (line_addr_offset.w.l << 1)) & 0x7fff) | (0x8000 * bank);
  65                         raddr = (addr & 0x7fff) | (0x8000 * bank);
  66                         target->write_data8(raddr + DISPLAY_VRAM_DIRECT_ACCESS, readdata);
  67                 }
  68         } else {
  69                 //raddr = ((addr + (line_addr_offset.w.l << 1)) & 0x3fff) | (0x4000 * bank);
  70                 raddr = (addr & 0x3fff) | (0x4000 * bank);
  71                 target->write_data8(raddr + DISPLAY_VRAM_DIRECT_ACCESS, readdata);
  72         }
  73         return readdata;
  74 }
  75
  76
  77 uint8 MB61VH010::do_pset(uint32 addr)
  78 {
  79         int i;
  80         uint32 raddr = addr;  // Use banked ram.
  81         uint8 bitmask;
  82         uint8 srcdata;
  83         int planes_b = planes;
  84         if(planes_b >= 4) planes_b = 4;
  85         for(i = 0; i < planes_b; i++) {
  86                 if((bank_disable_reg & (1 << i)) != 0) {
  87                         continue;
  88                 }
  89                 if((color_reg & (1 << i)) == 0) {
  90                         bitmask = 0x00;
  91                 } else {
  92                         bitmask = 0xff;
  93                 }
  94
  95                 srcdata = do_read(addr, i);
  96                 bitmask = bitmask & (~mask_reg);
  97                 srcdata = srcdata & mask_reg;
  98                 srcdata = srcdata | bitmask;
  99                 do_write(addr, i, srcdata);
 100         }
 101         return 0xff;
 102 }
 103
 104 uint8 MB61VH010::do_blank(uint32 addr)
 105 {
 106         uint32 i;
 107         uint8 srcdata;
 108
 109         if(planes >= 4) planes = 4;
 110         for(i = 0; i < planes; i++) {
 111                 if((bank_disable_reg & (1 << i)) != 0) {
 112                         continue;
 113                 }
 114                 srcdata = do_read(addr, i);
 115                 srcdata = srcdata & mask_reg;
 116                 do_write(addr, i, srcdata);
 117         }
 118         return 0xff;
 119 }
 120
 121 uint8 MB61VH010::do_or(uint32 addr)
 122 {
 123         uint32 i;
 124         uint8 bitmask;
 125         uint8 srcdata;
 126
 127         if(planes >= 4) planes = 4;
 128         for(i = 0; i < planes; i++) {
 129                 if((bank_disable_reg & (1 << i)) != 0) {
 130                         continue;
 131                 }
 132                 srcdata = do_read(addr, i);
 133                 if((color_reg & (1 << i)) == 0) {
 134                         bitmask = srcdata; // srcdata | 0x00
 135                 } else {
 136                         bitmask = 0xff; // srcdata | 0xff
 137                 }
 138                 bitmask = bitmask & ~mask_reg;
 139                 srcdata = (srcdata & mask_reg) | bitmask;
 140                 do_write(addr, i, srcdata);
 141         }
 142         return 0xff;
 143 }
 144
 145 uint8 MB61VH010::do_and(uint32 addr)
 146 {
 147         uint32 i;
 148         uint8 bitmask;
 149         uint8 srcdata;
 150
 151         if(planes >= 4) planes = 4;
 152         for(i = 0; i < planes; i++) {
 153                 if((bank_disable_reg & (1 << i)) != 0) {
 154                         continue;
 155                 }
 156                 srcdata = do_read(addr, i);
 157                 if((color_reg & (1 << i)) == 0) {
 158                         bitmask = 0x00; // srcdata & 0x00
 159                 } else {
 160                         bitmask = srcdata; // srcdata & 0xff;
 161                 }
 162                 bitmask = bitmask & ~mask_reg;
 163                 srcdata = (srcdata & mask_reg) | bitmask;
 164                 do_write(addr, i, srcdata);
 165         }
 166         return 0xff;
 167 }
 168
 169 uint8 MB61VH010::do_xor(uint32 addr)
 170 {
 171         uint32 i;
 172         uint8 bitmask;
 173         uint8 srcdata;
 174
 175         if(planes >= 4) planes = 4;
 176         for(i = 0; i < planes; i++) {
 177                 if((bank_disable_reg & (1 << i)) != 0) {
 178                         continue;
 179                 }
 180                 srcdata = do_read(addr, i);
 181                 if((color_reg & (1 << i)) == 0) {
 182                         bitmask = srcdata ^ 0x00;
 183                 } else {
 184                         bitmask = srcdata ^ 0xff;
 185                 }
 186                 bitmask = bitmask & ~mask_reg;
 187                 srcdata = (srcdata & mask_reg) | bitmask;
 188                 do_write(addr, i, srcdata);
 189         }
 190         return 0xff;
 191 }
 192
 193 uint8 MB61VH010::do_not(uint32 addr)
 194 {
 195         uint32 i;
 196         uint8 bitmask;
 197         uint8 srcdata;
 198
 199         if(planes >= 4) planes = 4;
 200         for(i = 0; i < planes; i++) {
 201                 if((bank_disable_reg & (1 << i)) != 0) {
 202                         continue;
 203                 }
 204                 srcdata = do_read(addr, i);
 205                 bitmask = ~srcdata;
 206
 207                 bitmask = bitmask & ~mask_reg;
 208                 srcdata = (srcdata & mask_reg) | bitmask;
 209                 do_write(addr, i, srcdata);
 210         }
 211         return 0xff;
 212 }
 213
 214
 215 uint8 MB61VH010::do_tilepaint(uint32 addr)
 216 {
 217         uint32 i;
 218         uint8 bitmask;
 219         uint8 srcdata;
 220         //printf("Tilepaint CMD=%02x, ADDR=%04x Planes=%d, disable=%d, tile_reg=(%02x %02x %02x %02x)\n",
 221         //      command_reg, addr, planes, bank_disable_reg, tile_reg[0], tile_reg[1], tile_reg[2], tile_reg[3]);
 222         if(planes > 4) planes = 4;
 223         for(i = 0; i < planes; i++) {
 224                 if((bank_disable_reg & (1 << i)) != 0) {
 225                         continue;
 226                 }
 227                 srcdata = do_read(addr, i);
 228                 bitmask = tile_reg[i] & (~mask_reg);
 229                 srcdata = (srcdata & mask_reg) | bitmask;
 230                 do_write(addr, i, srcdata);
 231         }
 232         return 0xff;
 233 }
 234
 235 uint8 MB61VH010::do_compare(uint32 addr)
 236 {
 237         uint32 offset = 0x4000;
 238         uint8 r, g, b;
 239         uint8 disables = ~bank_disable_reg;
 240         //uint8 disables = bank_disable_reg;
 241         uint8 tmpcol;
 242         uint8 tmp_stat = 0;
 243         uint8 cmp_reg_bak[8];
 244         int k;
 245         int i;
 246         int j;
 247
 248         disables = disables & 0x07;
 249         k = 0;
 250         for(j = 0; j < 8; j++) {
 251                 if((cmp_color_data[j] & 0x80) == 0) {
 252                         cmp_reg_bak[k] = cmp_color_data[j] & disables;
 253                         k++;
 254                 }
 255         }
 256         cmp_status_reg = 0x00;
 257         if(k <= 0) return 0xff;
 258         b = r = g = 0;
 259         b = do_read(addr, 0);
 260         r = do_read(addr, 1);
 261         g = do_read(addr, 2);
 262         for(i = 0; i < 8; i++) {
 263                 tmp_stat <<= 1;
 264                 tmpcol  = (b & 0x80) >> 7;
 265                 tmpcol  = tmpcol | ((r & 0x80) >> 6);
 266                 tmpcol  = tmpcol | ((g & 0x80) >> 5);
 267                 //tmpcol |= ((t & 0x80) != 0) ? 8 : 0;
 268                 tmpcol = tmpcol & disables;
 269                 for(j = 0; j < k; j++) {
 270                         if(cmp_reg_bak[j] == tmpcol) {
 271                                 tmp_stat = tmp_stat | 0x01;
 272                                 goto _l0;
 273                         }
 274                 }
 275 _l0:
 276                 b <<= 1;
 277                 r <<= 1;
 278                 g <<= 1;
 279         }
 280         cmp_status_reg = tmp_stat;
 281         return 0xff;
 282 }
 283
 284 void MB61VH010::do_alucmds_dmyread(uint32 addr)
 285 {
 286         if(!is_400line) {
 287                 addr = addr & 0x3fff;
 288         } else {
 289                 if(addr >= 0x8000) {
 290                         mask_reg = 0xff;
 291                         return;
 292                 }
 293                 addr = addr & 0x7fff;
 294         }
 295         if((command_reg & 0x80) == 0) {
 296                 return;
 297         }
 298         busy_flag = true;
 299         cmp_status_reg = 0x00;
 300         if((command_reg & 0x40) != 0) do_compare(addr);
 301         switch(command_reg & 0x07) {
 302                 case 0:
 303                         do_pset(addr);
 304                         break;
 305                 case 1:
 306                         do_blank(addr);
 307                         break;
 308                 case 2:
 309                         do_or(addr);
 310                         break;
 311                 case 3:
 312                         do_and(addr);
 313                         break;
 314                 case 4:
 315                         do_xor(addr);
 316                         break;
 317                 case 5:
 318                         do_not(addr);
 319                         break;
 320                 case 6:
 321                         do_tilepaint(addr);
 322                         break;
 323                 case 7:
 324                         do_compare(addr);
 325                         break;
 326         }
 327         //printf("ALU DMYREAD ADDR=%04x, CMD=%02x CMP STATUS=%02x\n", addr, command_reg, cmp_status_reg);
 328         if(eventid_busy >= 0) cancel_event(this, eventid_busy) ;
 329         register_event(this, EVENT_MB61VH010_BUSY_OFF, 1.0 / 16.0, false, &eventid_busy) ;
 330 }
 331
 332 uint8 MB61VH010::do_alucmds(uint32 addr)
 333 {
 334         if(!is_400line) {
 335                 addr = addr & 0x3fff;
 336         } else {
 337                 if(addr >= 0x8000) {
 338                         mask_reg = 0xff;
 339                         return 0xff;
 340                 }
 341                 addr = addr & 0x7fff;
 342         }
 343         cmp_status_reg = 0x00;
 344         if((command_reg & 0x40) != 0) do_compare(addr);
 345         switch(command_reg & 0x07) {
 346                 case 0:
 347                         return do_pset(addr);
 348                         break;
 349                 case 1:
 350                         return do_blank(addr);
 351                         break;
 352                 case 2:
 353                         return do_or(addr);
 354                         break;
 355                 case 3:
 356                         return do_and(addr);
 357                         break;
 358                 case 4:
 359                         return do_xor(addr);
 360                         break;
 361                 case 5:
 362                         return do_not(addr);
 363                         break;
 364                 case 6:
 365                         return do_tilepaint(addr);
 366                         break;
 367                 case 7:
 368                         if((command_reg & 0x40) != 0) return do_compare(addr);
 369                         break;
 370         }
 371         return 0xff;
 372 }
 373
 374 void MB61VH010::do_line(void)
 375 {
 376         int x_begin = line_xbegin.w.l;
 377         int x_end = line_xend.w.l;
 378         int y_begin = line_ybegin.w.l;
 379         int y_end = line_yend.w.l;
 380         int cpx_t = x_begin;
 381         int cpy_t = y_begin;
 382         int ax = x_end - x_begin;
 383         int ay = y_end - y_begin;
 384         int diff = 0;
 385         int count = 0;
 386         int xcount;
 387         int ycount;
 388         uint8 mask_bak = mask_reg;
 389         uint16 tmp8a;
 390         uint8 vmask[8] = {0x80, 0x40, 0x20, 0x10, 0x08, 0x04, 0x02, 0x01};
 391         //printf("Line: (%d,%d) - (%d,%d) CMD=%02x\n", x_begin, y_begin, x_end, y_end, command_reg);
 392         double usec;
 393         bool lastflag = false;
 394
 395         //is_400line = (target->read_signal(SIG_DISPLAY_MODE_IS_400LINE) != 0) ? true : false;
 396         planes = target->read_signal(SIG_DISPLAY_PLANES) & 0x07;
 397         screen_width = target->read_signal(SIG_DISPLAY_X_WIDTH) * 8;
 398         screen_height = target->read_signal(SIG_DISPLAY_Y_HEIGHT);
 399
 400         //if((command_reg & 0x80) == 0) return;
 401         oldaddr = 0xffffffff;
 402         //alu_addr = 0xffffffff;
 403
 404
 405         line_style = line_pattern;
 406         busy_flag = true;
 407         total_bytes = 1;
 408
 409         mask_reg = 0xff;
 410         if((line_style.b.h & 0x80) != 0) {
 411                 mask_reg &= ~vmask[cpx_t & 7];
 412         }
 413         tmp8a = (line_style.w.l & 0x8000) >> 15;
 414         line_style.w.l = (line_style.w.l << 1) | tmp8a;
 415
 416         xcount = abs(ax);
 417         ycount = abs(ay);
 418         lastflag = put_dot(x_begin, y_begin);
 419         if(ycount == 0) {
 420                 if(xcount != 0) {
 421                         if(ax > 0) {
 422                                 for(; cpx_t <= x_end; cpx_t++) {
 423                                         lastflag = put_dot(cpx_t, cpy_t);
 424                                 }
 425                         } else {
 426                                 for(; cpx_t >= x_end; cpx_t--) {
 427                                         lastflag = put_dot(cpx_t, cpy_t);
 428                                 }
 429                         }
 430                         //lastflag = true;
 431                 }
 432         } else if(xcount == 0) {
 433                 if(ay > 0) {
 434                         for(; cpy_t <= y_end; cpy_t++) {
 435                                 lastflag = put_dot(cpx_t, cpy_t);
 436                         }
 437                 } else {
 438                         for(; cpy_t  >= y_end; cpy_t--) {
 439                                 lastflag = put_dot(cpx_t, cpy_t);
 440                         }
 441                 }
 442                 //lastflag = true;
 443         } else if(xcount >= ycount) {
 444                 //xcount++;
 445                 //diff = ((ycount + 1) * 32768) / xcount;
 446                 diff = (ycount * 32768) / xcount;
 447                 for(; xcount >= 0; xcount-- ) {
 448                         lastflag = put_dot(cpx_t, cpy_t);
 449                         count += diff;
 450                         if(count > 16384) {
 451                                 if(ay < 0) {
 452                                         if(cpy_t > y_end) cpy_t--;
 453                                 } else {
 454                                         if(cpy_t < y_end) cpy_t++;
 455                                 }
 456                                 count -= 32768;
 457                                 //lastflag = put_dot(cpx_t, cpy_t);
 458                         }
 459                         if(ax > 0) {
 460                                 cpx_t++;
 461                         } else if(ax < 0) {
 462                                 cpx_t--;
 463                         }
 464                 }
 465         } else { // (abs(ax) <= abs(ay)
 466                 //diff = ((xcount + 1) * 32768) / ycount;
 467                 diff = (xcount  * 32768) / ycount;
 468                 for(; ycount >= 0; ycount--) {
 469                         lastflag = put_dot(cpx_t, cpy_t);
 470                         count += diff;
 471                         if(count > 16384) {
 472                                 if(ax < 0) {
 473                                         if(cpx_t > x_end) cpx_t--;
 474                                 } else if(ax > 0) {
 475                                         if(cpx_t < x_end) cpx_t++;
 476                                 }
 477                                 count -= 32768;
 478                                 //lastflag = put_dot(cpx_t, cpy_t);
 479                         }
 480                         if(ay > 0) {
 481                                 cpy_t++;
 482                         } else {
 483                                 cpy_t--;
 484                         }
 485                         //total_bytes++;
 486                 }
 487         }
 488         lastflag = put_dot(x_end, y_end);
 489         if(!lastflag) total_bytes++;
 490         do_alucmds(alu_addr);
 491
 492         //if(total_bytes > 8) { // Over 0.5us
 493         usec = (double)total_bytes / 16.0;
 494         if(eventid_busy >= 0) cancel_event(this, eventid_busy) ;
 495         register_event(this, EVENT_MB61VH010_BUSY_OFF, usec, false, &eventid_busy) ;
 496         mask_reg = mask_bak;
 497 }
 498
 499 bool MB61VH010::put_dot(int x, int y)
 500 {
 501         uint8 vmask[8] = {0x80, 0x40, 0x20, 0x10, 0x08, 0x04, 0x02, 0x01};
 502         uint16 tmp8a;
 503         bool flag = false;
 504
 505         if((x < 0) || (y < 0)) return flag;
 506         if((x >= screen_width) || (y >= screen_height)) return flag;
 507         if((command_reg & 0x80) == 0) return flag;
 508
 509         alu_addr = ((y * screen_width) >> 3) + (x >> 3);
 510         alu_addr = alu_addr + (line_addr_offset.w.l << 1);
 511         alu_addr = alu_addr & 0x7fff;
 512         if(!is_400line) alu_addr = alu_addr & 0x3fff;
 513
 514         if(oldaddr != alu_addr) {
 515                 if(oldaddr == 0xffffffff) oldaddr = alu_addr;
 516                 do_alucmds(oldaddr);
 517                 mask_reg = 0xff;
 518                 oldaddr = alu_addr;
 519                 flag = true;
 520                 total_bytes++;
 521         }
 522
 523         if((line_style.b.h & 0x80) != 0) {
 524                 mask_reg &= ~vmask[x & 7];
 525         }
 526         tmp8a = (line_style.w.l & 0x8000) >> 15;
 527         line_style.w.l = (line_style.w.l << 1) | tmp8a;
 528         return flag;
 529 }
 530
 531 void MB61VH010::write_data8(uint32 id, uint32 data)
 532 {
 533         //printf("ALU: ADDR=%02x DATA=%02x\n", id, data);
 534         if(id == ALU_CMDREG) {
 535                 command_reg = data;
 536                 return;
 537         }
 538         switch(id) {
 539                 case ALU_LOGICAL_COLOR:
 540                         color_reg = data;
 541                         break;
 542                 case ALU_WRITE_MASKREG:
 543                         mask_reg = data;
 544                         break;
 545                 case ALU_BANK_DISABLE:
 546                         bank_disable_reg = data;
 547                         break;
 548                 case ALU_TILEPAINT_B:
 549                         tile_reg[0] = data;
 550                         break;
 551                 case ALU_TILEPAINT_R:
 552                         tile_reg[1] = data;
 553                         break;
 554                 case ALU_TILEPAINT_G:
 555                         tile_reg[2] = data;
 556                         break;
 557                 case ALU_TILEPAINT_L:
 558                         tile_reg[3] = data;
 559                         break;
 560                 case ALU_OFFSET_REG_HIGH:
 561                         line_addr_offset.b.h = data;
 562                         break;
 563                 case ALU_OFFSET_REG_LO:
 564                         line_addr_offset.b.l = data;
 565                         break;
 566                 case ALU_LINEPATTERN_REG_HIGH:
 567                         line_pattern.b.h = data;
 568                         break;
 569                 case ALU_LINEPATTERN_REG_LO:
 570                         line_pattern.b.l = data;
 571                         break;
 572                 case ALU_LINEPOS_START_X_HIGH:
 573                         line_xbegin.b.h = data;
 574                         break;
 575                 case ALU_LINEPOS_START_X_LOW:
 576                         line_xbegin.b.l = data;
 577                         break;
 578                 case ALU_LINEPOS_START_Y_HIGH:
 579                         line_ybegin.b.h = data;
 580                         break;
 581                 case ALU_LINEPOS_START_Y_LOW:
 582                         line_ybegin.b.l = data;
 583                         break;
 584                 case ALU_LINEPOS_END_X_HIGH:
 585                         line_xend.b.h = data;
 586                         break;
 587                 case ALU_LINEPOS_END_X_LOW:
 588                         line_xend.b.l = data;
 589                         break;
 590                 case ALU_LINEPOS_END_Y_HIGH:
 591                         line_yend.b.h = data;
 592                         break;
 593                 case ALU_LINEPOS_END_Y_LOW:
 594                         line_yend.b.l = data;
 595                         do_line();
 596                         break;
 597                 default:
 598                         if((id >= (ALU_CMPDATA_REG + 0)) && (id < (ALU_CMPDATA_REG + 8))) {
 599                                 cmp_color_data[id - ALU_CMPDATA_REG] = data;
 600                         } else  if((id >= ALU_WRITE_PROXY) && (id < (ALU_WRITE_PROXY + 0x18000))) {
 601                                 uint32 raddr = id - ALU_WRITE_PROXY;
 602                                 if(is_400line) {
 603                                         raddr = raddr & 0x7fff;
 604                                 } else {
 605                                         raddr = raddr & 0x3fff;
 606                                 }
 607                                 do_alucmds_dmyread(raddr);
 608                         }
 609                         break;
 610         }
 611 }
 612
 613 uint32 MB61VH010::read_data8(uint32 id)
 614 {
 615         uint32 raddr;
 616         switch(id) {
 617                 case ALU_CMDREG:
 618                         return (uint32)command_reg;
 619                         break;
 620                 case ALU_LOGICAL_COLOR:
 621                         return (uint32)color_reg;
 622                         break;
 623                 case ALU_WRITE_MASKREG:
 624                         return (uint32)mask_reg;
 625                         break;
 626                 case ALU_CMP_STATUS_REG:
 627                         return (uint32)cmp_status_reg;
 628                         break;
 629                 case ALU_BANK_DISABLE:
 630                         return (uint32)bank_disable_reg;
 631                         break;
 632                 default:
 633                         if((id >= ALU_WRITE_PROXY) && (id < (ALU_WRITE_PROXY + 0x18000))) {
 634                                 uint32 dmydata;
 635                                 raddr = id - ALU_WRITE_PROXY;
 636                                 //is_400line = (target->read_signal(SIG_DISPLAY_MODE_IS_400LINE) != 0) ? true : false;
 637                                 if(is_400line) {
 638                                         raddr = raddr & 0x7fff;
 639                                 } else {
 640                                         raddr = raddr & 0x3fff;
 641                                 }
 642                                 //dmydata = target->read_data8(raddr + DISPLAY_VRAM_DIRECT_ACCESS);
 643                                 do_alucmds_dmyread(raddr);
 644                                 dmydata = target->read_data8(raddr + DISPLAY_VRAM_DIRECT_ACCESS);
 645                                 return dmydata;
 646                         }
 647                         return 0xffffffff;
 648                         break;
 649         }
 650 }
 651
 652 uint32 MB61VH010::read_signal(int id)
 653 {
 654         uint32 val = 0x00000000;
 655         switch(id) {
 656                 case SIG_ALU_BUSYSTAT:
 657                         if(busy_flag) val = 0xffffffff;
 658                         break;
 659         }
 660         return val;
 661 }
 662
 663 void MB61VH010::write_signal(int id, uint32 data, uint32 mask)
 664 {
 665         bool flag = ((data & mask) != 0);
 666         switch(id) {
 667                 case SIG_ALU_400LINE:
 668                         is_400line = flag;
 669                         break;
 670                 case SIG_ALU_MULTIPAGE:
 671                         multi_page = (data & mask) & 0x07;
 672                         break;
 673         }
 674 }
 675
 676 void MB61VH010::event_callback(int event_id, int err)
 677 {
 678         switch(event_id) {
 679                 case EVENT_MB61VH010_BUSY_ON:
 680                         busy_flag = true;
 681                         if(eventid_busy >= 0) cancel_event(this, eventid_busy);
 682                         eventid_busy = -1;
 683                         break;
 684                 case EVENT_MB61VH010_BUSY_OFF:
 685                         busy_flag = false;
 686                         eventid_busy = -1;
 687                         break;
 688         }
 689 }
 690
 691 void MB61VH010::initialize(void)
 692 {
 693         busy_flag = false;
 694         is_400line = false;
 695         eventid_busy = -1;
 696         multi_page = 0x00;
 697 }
 698
 699 void MB61VH010::reset(void)
 700 {
 701         int i;
 702         busy_flag = false;
 703         if(eventid_busy >= 0) cancel_event(this, eventid_busy);
 704         eventid_busy = -1;
 705
 706         command_reg = 0;        // D410 (RW)
 707         color_reg = 0;          // D411 (RW)
 708         mask_reg = 0;           // D412 (RW)
 709         cmp_status_reg = 0;     // D413 (RO)
 710         for(i = 0; i < 8; i++) cmp_color_data[i] = 0x80; // D413-D41A (WO)
 711         bank_disable_reg = 0;   // D41B (RW)
 712         for(i = 0; i < 4; i++) tile_reg[i] = 0;        // D41C-D41F (WO)
 713
 714         line_addr_offset.d = 0; // D420-D421 (WO)
 715         line_pattern.d = 0;     // D422-D423 (WO)
 716         line_xbegin.d = 0;      // D424-D425 (WO)
 717         line_ybegin.d = 0;      // D426-D427 (WO)
 718         line_xend.d = 0;        // D428-D429 (WO)
 719         line_yend.d = 0;        // D42A-D42B (WO)
 720
 721         oldaddr = 0xffffffff;
 722
 723         planes = target->read_signal(SIG_DISPLAY_PLANES) & 0x07;
 724         if(planes >= 4) planes = 4;
 725         //is_400line = (target->read_signal(SIG_DISPLAY_MODE_IS_400LINE) != 0) ? true : false;
 726
 727         screen_width = target->read_signal(SIG_DISPLAY_X_WIDTH) * 8;
 728         screen_height = target->read_signal(SIG_DISPLAY_Y_HEIGHT);
 729 }