dlls/winedos/ioports.c

   1 /*
   2  * Emulation of processor ioports.
   3  *
   4  * Copyright 1995 Morten Welinder
   5  * Copyright 1998 Andreas Mohr, Ove Kaaven
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  20  */
  21
  22 /* Known problems:
  23    - only a few ports are emulated.
  24    - real-time clock in "cmos" is bogus.  A nifty alarm() setup could
  25      fix that, I guess.
  26 */
  27
  28 #include "config.h"
  29
  30 #include <stdarg.h>
  31 #include <stdlib.h>
  32
  33 #include "windef.h"
  34 #include "winbase.h"
  35 #include "winnls.h"
  36 #include "winreg.h"
  37 #include "winternl.h"
  38 #include "dosexe.h"
  39 #include "vga.h"
  40 #include "wine/unicode.h"
  41 #include "wine/debug.h"
  42
  43 WINE_DEFAULT_DEBUG_CHANNEL(int);
  44
  45 #if defined(linux) && defined(__i386__)
  46 # define DIRECT_IO_ACCESS
  47 #else
  48 # undef DIRECT_IO_ACCESS
  49 #endif  /* linux && __i386__ */
  50
  51 static struct {
  52     WORD        countmax;
  53     BOOL16      byte_toggle; /* if TRUE, then hi byte has already been written */
  54     WORD        latch;
  55     BOOL16      latched;
  56     BYTE        ctrlbyte_ch;
  57     WORD        oldval;
  58 } tmr_8253[3] = {
  59     {0xFFFF,    FALSE,  0,      FALSE,  0x36,   0},
  60     {0x0012,    FALSE,  0,      FALSE,  0x74,   0},
  61     {0x0001,    FALSE,  0,      FALSE,  0xB6,   0},
  62 };
  63
  64 static int dummy_ctr = 0;
  65
  66 static BYTE parport_8255[4] = {0x4f, 0x20, 0xff, 0xff};
  67
  68 static BYTE cmosaddress;
  69
  70 static int cmos_image_initialized = 0;
  71
  72 static BYTE cmosimage[64] =
  73 {
  74   0x27, /* 0x00: seconds */
  75   0x34, /* 0X01: seconds alarm */
  76   0x31, /* 0x02: minutes */
  77   0x47, /* 0x03: minutes alarm */
  78   0x16, /* 0x04: hour */
  79   0x15, /* 0x05: hour alarm */
  80   0x00, /* 0x06: week day */
  81   0x01, /* 0x07: month day */
  82   0x04, /* 0x08: month */
  83   0x94, /* 0x09: year */
  84   0x26, /* 0x0a: state A */
  85   0x02, /* 0x0b: state B */
  86   0x50, /* 0x0c: state C */
  87   0x80, /* 0x0d: state D */
  88   0x00, /* 0x0e: state diagnostic */
  89   0x00, /* 0x0f: state state shutdown */
  90   0x40, /* 0x10: floppy type */
  91   0xb1, /* 0x11: reserved */
  92   0x00, /* 0x12: HD type */
  93   0x9c, /* 0x13: reserved */
  94   0x01, /* 0x14: equipment */
  95   0x80, /* 0x15: low base memory */
  96   0x02, /* 0x16: high base memory (0x280 => 640KB) */
  97   0x00, /* 0x17: low extended memory */
  98   0x3b, /* 0x18: high extended memory (0x3b00 => 15MB) */
  99   0x00, /* 0x19: HD 1 extended type byte */
 100   0x00, /* 0x1a: HD 2 extended type byte */
 101   0xad, /* 0x1b: reserved */
 102   0x02, /* 0x1c: reserved */
 103   0x10, /* 0x1d: reserved */
 104   0x00, /* 0x1e: reserved */
 105   0x00, /* 0x1f: installed features */
 106   0x08, /* 0x20: HD 1 low cylinder number */
 107   0x00, /* 0x21: HD 1 high cylinder number */
 108   0x00, /* 0x22: HD 1 heads */
 109   0x26, /* 0x23: HD 1 low pre-compensation start */
 110   0x00, /* 0x24: HD 1 high pre-compensation start */
 111   0x00, /* 0x25: HD 1 low landing zone */
 112   0x00, /* 0x26: HD 1 high landing zone */
 113   0x00, /* 0x27: HD 1 sectors */
 114   0x00, /* 0x28: options 1 */
 115   0x00, /* 0x29: reserved */
 116   0x00, /* 0x2a: reserved */
 117   0x00, /* 0x2b: options 2 */
 118   0x00, /* 0x2c: options 3 */
 119   0x3f, /* 0x2d: reserved  */
 120   0xcc, /* 0x2e: low CMOS ram checksum (computed automatically) */
 121   0xcc, /* 0x2f: high CMOS ram checksum (computed automatically) */
 122   0x00, /* 0x30: low extended memory byte */
 123   0x1c, /* 0x31: high extended memory byte */
 124   0x19, /* 0x32: century byte */
 125   0x81, /* 0x33: setup information */
 126   0x00, /* 0x34: CPU speed */
 127   0x0e, /* 0x35: HD 2 low cylinder number */
 128   0x00, /* 0x36: HD 2 high cylinder number */
 129   0x80, /* 0x37: HD 2 heads */
 130   0x1b, /* 0x38: HD 2 low pre-compensation start */
 131   0x7b, /* 0x39: HD 2 high pre-compensation start */
 132   0x21, /* 0x3a: HD 2 low landing zone */
 133   0x00, /* 0x3b: HD 2 high landing zone */
 134   0x00, /* 0x3c: HD 2 sectors */
 135   0x00, /* 0x3d: reserved */
 136   0x05, /* 0x3e: reserved */
 137   0x5f  /* 0x3f: reserved */
 138 };
 139
 140 static void IO_FixCMOSCheckSum(void)
 141 {
 142         WORD sum = 0;
 143         int i;
 144
 145         for (i=0x10; i < 0x2d; i++)
 146                 sum += cmosimage[i];
 147         cmosimage[0x2e] = sum >> 8; /* yes, this IS hi byte !! */
 148         cmosimage[0x2f] = sum & 0xff;
 149         TRACE("calculated hi %02x, lo %02x\n", cmosimage[0x2e], cmosimage[0x2f]);
 150 }
 151
 152 #ifdef DIRECT_IO_ACCESS
 153
 154 extern int iopl(int level);
 155 static char do_direct_port_access = -1;
 156 static char port_permissions[0x10000];
 157
 158 #define IO_READ  1
 159 #define IO_WRITE 2
 160
 161 #endif  /* DIRECT_IO_ACCESS */
 162
 163 #ifdef HAVE_PPDEV
 164 static int do_pp_port_access = -1; /* -1: uninitialized, 1: not available
 165                                        0: available);*/
 166 #endif
 167
 168 static void set_timer_maxval(unsigned timer, unsigned maxval)
 169 {
 170     switch (timer) {
 171         case 0: /* System timer counter divisor */
 172             DOSVM_SetTimer(maxval);
 173             break;
 174         case 1: /* RAM refresh */
 175             FIXME("RAM refresh counter handling not implemented !\n");
 176             break;
 177         case 2: /* cassette & speaker */
 178             /* speaker on ? */
 179             if ((parport_8255[1] & 3) == 3)
 180             {
 181                 TRACE("Beep (freq: %d) !\n", 1193180 / maxval );
 182                 Beep(1193180 / maxval, 20);
 183             }
 184             break;
 185     }
 186 }
 187
 188
 189 /**********************************************************************
 190  *          IO_port_init
 191  */
 192
 193 /* set_IO_permissions(int val1, int val)
 194  * Helper function for IO_port_init
 195  */
 196 #ifdef DIRECT_IO_ACCESS
 197 static void set_IO_permissions(int val1, int val, char rw)
 198 {
 199         int j;
 200         if (val1 != -1) {
 201                 if (val == -1) val = 0x3ff;
 202                 for (j = val1; j <= val; j++)
 203                         port_permissions[j] |= rw;
 204
 205                 do_direct_port_access = 1;
 206
 207                 val1 = -1;
 208         } else if (val != -1) {
 209                 do_direct_port_access = 1;
 210
 211                 port_permissions[val] |= rw;
 212         }
 213
 214 }
 215
 216 /* do_IO_port_init_read_or_write(char* temp, char rw)
 217  * Helper function for IO_port_init
 218  */
 219
 220 static void do_IO_port_init_read_or_write(const WCHAR *str, char rw)
 221 {
 222     int val, val1;
 223     unsigned int i;
 224     WCHAR *end;
 225     static const WCHAR allW[] = {'a','l','l',0};
 226
 227     if (!strcmpiW(str, allW))
 228     {
 229         for (i=0; i < sizeof(port_permissions); i++)
 230             port_permissions[i] |= rw;
 231     }
 232     else
 233     {
 234         val = -1;
 235         val1 = -1;
 236         while (*str)
 237         {
 238             switch(*str)
 239             {
 240             case ',':
 241             case ' ':
 242             case '\t':
 243                 set_IO_permissions(val1, val, rw);
 244                 val1 = -1;
 245                 val = -1;
 246                 str++;
 247                 break;
 248             case '-':
 249                 val1 = val;
 250                 if (val1 == -1) val1 = 0;
 251                 str++;
 252                 break;
 253             default:
 254                 if (isdigitW(*str))
 255                 {
 256                     val = strtoulW( str, &end, 0 );
 257                     if (end == str)
 258                     {
 259                         val = -1;
 260                         str++;
 261                     }
 262                     else str = end;
 263                 }
 264                 break;
 265             }
 266         }
 267         set_IO_permissions(val1, val, rw);
 268     }
 269 }
 270
 271 static inline BYTE inb( WORD port )
 272 {
 273     BYTE b;
 274     __asm__ __volatile__( "inb %w1,%0" : "=a" (b) : "d" (port) );
 275     return b;
 276 }
 277
 278 static inline WORD inw( WORD port )
 279 {
 280     WORD w;
 281     __asm__ __volatile__( "inw %w1,%0" : "=a" (w) : "d" (port) );
 282     return w;
 283 }
 284
 285 static inline DWORD inl( WORD port )
 286 {
 287     DWORD dw;
 288     __asm__ __volatile__( "inl %w1,%0" : "=a" (dw) : "d" (port) );
 289     return dw;
 290 }
 291
 292 static inline void outb( BYTE value, WORD port )
 293 {
 294     __asm__ __volatile__( "outb %b0,%w1" : : "a" (value), "d" (port) );
 295 }
 296
 297 static inline void outw( WORD value, WORD port )
 298 {
 299     __asm__ __volatile__( "outw %w0,%w1" : : "a" (value), "d" (port) );
 300 }
 301
 302 static inline void outl( DWORD value, WORD port )
 303 {
 304     __asm__ __volatile__( "outl %0,%w1" : : "a" (value), "d" (port) );
 305 }
 306
 307 static void IO_port_init(void)
 308 {
 309     char tmp[1024];
 310     HANDLE root, hkey;
 311     DWORD dummy;
 312     OBJECT_ATTRIBUTES attr;
 313     UNICODE_STRING nameW;
 314
 315     static const WCHAR portsW[] = {'S','o','f','t','w','a','r','e','\\',
 316                                    'W','i','n','e','\\','V','D','M','\\','P','o','r','t','s',0};
 317     static const WCHAR readW[] = {'r','e','a','d',0};
 318     static const WCHAR writeW[] = {'w','r','i','t','e',0};
 319
 320     do_direct_port_access = 0;
 321     /* Can we do that? */
 322     if (!iopl(3))
 323     {
 324         iopl(0);
 325
 326         RtlOpenCurrentUser( KEY_ALL_ACCESS, &root );
 327         attr.Length = sizeof(attr);
 328         attr.RootDirectory = root;
 329         attr.ObjectName = &nameW;
 330         attr.Attributes = 0;
 331         attr.SecurityDescriptor = NULL;
 332         attr.SecurityQualityOfService = NULL;
 333         RtlInitUnicodeString( &nameW, portsW );
 334
 335         /* @@ Wine registry key: HKCU\Software\Wine\VDM\Ports */
 336         if (!NtOpenKey( &hkey, KEY_ALL_ACCESS, &attr ))
 337         {
 338             RtlInitUnicodeString( &nameW, readW );
 339             if (!NtQueryValueKey( hkey, &nameW, KeyValuePartialInformation, tmp, sizeof(tmp), &dummy ))
 340             {
 341                 WCHAR *str = (WCHAR *)((KEY_VALUE_PARTIAL_INFORMATION *)tmp)->Data;
 342                 do_IO_port_init_read_or_write(str, IO_READ);
 343             }
 344             RtlInitUnicodeString( &nameW, writeW );
 345             if (!NtQueryValueKey( hkey, &nameW, KeyValuePartialInformation, tmp, sizeof(tmp), &dummy ))
 346             {
 347                 WCHAR *str = (WCHAR *)((KEY_VALUE_PARTIAL_INFORMATION *)tmp)->Data;
 348                 do_IO_port_init_read_or_write(str, IO_WRITE);
 349             }
 350             NtClose( hkey );
 351         }
 352         NtClose( root );
 353     }
 354 }
 355
 356 #endif  /* DIRECT_IO_ACCESS */
 357
 358
 359 /**********************************************************************
 360  *          inport   (WINEDOS.@)
 361  *
 362  * Note: The size argument has to be handled correctly _externally_
 363  * (as we always return a DWORD)
 364  */
 365 DWORD WINAPI DOSVM_inport( int port, int size )
 366 {
 367     DWORD res = ~0U;
 368
 369     TRACE("%d-byte value from port 0x%04x\n", size, port );
 370
 371 #ifdef HAVE_PPDEV
 372     if (do_pp_port_access == -1) do_pp_port_access =IO_pp_init();
 373     if ((do_pp_port_access == 0 ) && (size == 1))
 374     {
 375         if (!IO_pp_inp(port,&res)) return res;
 376     }
 377 #endif
 378
 379 #ifdef DIRECT_IO_ACCESS
 380     if (do_direct_port_access == -1) IO_port_init();
 381     if ((do_direct_port_access)
 382         /* Make sure we have access to the port */
 383         && (port_permissions[port] & IO_READ))
 384     {
 385         iopl(3);
 386         switch(size)
 387         {
 388         case 1: res = inb( port ); break;
 389         case 2: res = inw( port ); break;
 390         case 4: res = inl( port ); break;
 391         }
 392         iopl(0);
 393         return res;
 394     }
 395 #endif
 396
 397     switch (port)
 398     {
 399     case 0x40:
 400     case 0x41:
 401     case 0x42:
 402         {
 403             BYTE chan = port & 3;
 404             WORD tempval = 0;
 405             if (tmr_8253[chan].latched)
 406                 tempval = tmr_8253[chan].latch;
 407             else
 408             {
 409                 dummy_ctr -= 1 + (int)(10.0 * rand() / (RAND_MAX + 1.0));
 410                 if (chan == 0) /* System timer counter divisor */
 411                 {
 412                     /* FIXME: DOSVM_GetTimer() returns quite rigid values */
 413                     tempval = dummy_ctr + (WORD)DOSVM_GetTimer();
 414                 }
 415                 else
 416                 {
 417                     /* FIXME: intelligent hardware timer emulation needed */
 418                     tempval = dummy_ctr;
 419                 }
 420             }
 421
 422             switch ((tmr_8253[chan].ctrlbyte_ch & 0x30) >> 4)
 423             {
 424             case 0:
 425                 res = 0; /* shouldn't happen? */
 426                 break;
 427             case 1: /* read lo byte */
 428                 res = (BYTE)tempval;
 429                 tmr_8253[chan].latched = FALSE;
 430                 break;
 431             case 3: /* read lo byte, then hi byte */
 432                 tmr_8253[chan].byte_toggle ^= 1; /* toggle */
 433                 if (tmr_8253[chan].byte_toggle)
 434                 {
 435                     res = (BYTE)tempval;
 436                     break;
 437                 }
 438                 /* else [fall through if read hi byte !] */
 439             case 2: /* read hi byte */
 440                 res = (BYTE)(tempval >> 8);
 441                 tmr_8253[chan].latched = FALSE;
 442                 break;
 443             }
 444         }
 445         break;
 446     case 0x60:
 447         res = DOSVM_Int09ReadScan(NULL);
 448         break;
 449     case 0x61:
 450         res = (DWORD)parport_8255[1];
 451         break;
 452     case 0x62:
 453         res = (DWORD)parport_8255[2];
 454         break;
 455     case 0x70:
 456         res = (DWORD)cmosaddress;
 457         break;
 458     case 0x71:
 459         if (!cmos_image_initialized)
 460         {
 461             IO_FixCMOSCheckSum();
 462             cmos_image_initialized = 1;
 463         }
 464         res = (DWORD)cmosimage[cmosaddress & 0x3f];
 465         break;
 466     case 0x200:
 467     case 0x201:
 468         res = ~0U; /* no joystick */
 469         break;
 470     case 0x22a:
 471     case 0x22c:
 472     case 0x22e:
 473         res = (DWORD)SB_ioport_in( port );
 474         break;
 475     /* VGA read registers */
 476     case 0x3b4:  /* CRT Controller Register - Index (MDA) */
 477     case 0x3b5:  /* CRT Controller Register - Other (MDA) */
 478     case 0x3ba:  /* General Register - Input status 1 (MDA) */
 479     case 0x3c0:  /* Attribute Controller - Address */
 480     case 0x3c1:  /* Attribute Controller - Other */
 481     case 0x3c2:  /* General Register - Input status 0 */
 482     case 0x3c3:  /* General Register - Video subsystem enable */
 483     case 0x3c4:  /* Sequencer Register - Address */
 484     case 0x3c5:  /* Sequencer Register - Other */
 485     case 0x3c6:
 486     case 0x3c7:  /* General Register -  DAC State */
 487     case 0x3c8:
 488     case 0x3c9:
 489     case 0x3ca:  /* General Register - Feature control */
 490     case 0x3cb:
 491     case 0x3cc:  /* General Register - Misc output */
 492     case 0x3cd:
 493     case 0x3ce:  /* Graphics Controller Register - Address */
 494     case 0x3cf:  /* Graphics Controller Register - Other */
 495     case 0x3d0:
 496     case 0x3d1:
 497     case 0x3d2:
 498     case 0x3d3:
 499     case 0x3d4:  /* CRT Controller Register - Index (CGA) */
 500     case 0x3d5:  /* CRT Controller Register - Other (CGA) */
 501     case 0x3d6:
 502     case 0x3d7:
 503     case 0x3d8:
 504     case 0x3d9:
 505     case 0x3da:
 506     case 0x3db:
 507     case 0x3dc:
 508     case 0x3dd:
 509     case 0x3de:
 510     case 0x3df:
 511         if (size > 1)
 512             FIXME("Trying to read more than one byte from VGA!\n");
 513         res = (DWORD)VGA_ioport_in( port );
 514         break;
 515     case 0x00:
 516     case 0x01:
 517     case 0x02:
 518     case 0x03:
 519     case 0x04:
 520     case 0x05:
 521     case 0x06:
 522     case 0x07:
 523     case 0xC0:
 524     case 0xC2:
 525     case 0xC4:
 526     case 0xC6:
 527     case 0xC8:
 528     case 0xCA:
 529     case 0xCC:
 530     case 0xCE:
 531     case 0x87:
 532     case 0x83:
 533     case 0x81:
 534     case 0x82:
 535     case 0x8B:
 536     case 0x89:
 537     case 0x8A:
 538     case 0x487:
 539     case 0x483:
 540     case 0x481:
 541     case 0x482:
 542     case 0x48B:
 543     case 0x489:
 544     case 0x48A:
 545     case 0x08:
 546     case 0xD0:
 547     case 0x0D:
 548     case 0xDA:
 549         res = (DWORD)DMA_ioport_in( port );
 550         break;
 551     default:
 552         WARN("Direct I/O read attempted from port %x\n", port);
 553         break;
 554     }
 555     return res;
 556 }
 557
 558
 559 /**********************************************************************
 560  *          outport  (WINEDOS.@)
 561  */
 562 void WINAPI DOSVM_outport( int port, int size, DWORD value )
 563 {
 564     TRACE("IO: 0x%x (%d-byte value) to port 0x%04x\n", value, size, port );
 565
 566 #ifdef HAVE_PPDEV
 567     if (do_pp_port_access == -1) do_pp_port_access = IO_pp_init();
 568     if ((do_pp_port_access == 0) && (size == 1))
 569     {
 570         if (!IO_pp_outp(port,&value)) return;
 571     }
 572 #endif
 573
 574 #ifdef DIRECT_IO_ACCESS
 575
 576     if (do_direct_port_access == -1) IO_port_init();
 577     if ((do_direct_port_access)
 578         /* Make sure we have access to the port */
 579         && (port_permissions[port] & IO_WRITE))
 580     {
 581         iopl(3);
 582         switch(size)
 583         {
 584         case 1: outb( LOBYTE(value), port ); break;
 585         case 2: outw( LOWORD(value), port ); break;
 586         case 4: outl( value, port ); break;
 587         }
 588         iopl(0);
 589         return;
 590     }
 591 #endif
 592
 593     switch (port)
 594     {
 595     case 0x20:
 596         DOSVM_PIC_ioport_out( port, (BYTE)value );
 597         break;
 598     case 0x40:
 599     case 0x41:
 600     case 0x42:
 601         {
 602             BYTE chan = port & 3;
 603
 604             /* we need to get the oldval before any lo/hi byte change has been made */
 605             if (((tmr_8253[chan].ctrlbyte_ch & 0x30) != 0x30) ||
 606                 !tmr_8253[chan].byte_toggle)
 607                 tmr_8253[chan].oldval = tmr_8253[chan].countmax;
 608             switch ((tmr_8253[chan].ctrlbyte_ch & 0x30) >> 4)
 609             {
 610             case 0:
 611                 break; /* shouldn't happen? */
 612             case 1: /* write lo byte */
 613                 tmr_8253[chan].countmax =
 614                     (tmr_8253[chan].countmax & 0xff00) | (BYTE)value;
 615                 break;
 616             case 3: /* write lo byte, then hi byte */
 617                 tmr_8253[chan].byte_toggle ^= TRUE; /* toggle */
 618                 if (tmr_8253[chan].byte_toggle)
 619                 {
 620                     tmr_8253[chan].countmax =
 621                         (tmr_8253[chan].countmax & 0xff00) | (BYTE)value;
 622                     break;
 623                 }
 624                 /* else [fall through if write hi byte !] */
 625             case 2: /* write hi byte */
 626                 tmr_8253[chan].countmax =
 627                     (tmr_8253[chan].countmax & 0x00ff) | ((BYTE)value << 8);
 628                 break;
 629             }
 630             /* if programming is finished and value has changed
 631                then update to new value */
 632             if ((((tmr_8253[chan].ctrlbyte_ch & 0x30) != 0x30) ||
 633                  !tmr_8253[chan].byte_toggle) &&
 634                 (tmr_8253[chan].countmax != tmr_8253[chan].oldval))
 635                 set_timer_maxval(chan, tmr_8253[chan].countmax);
 636         }
 637         break;
 638     case 0x43:
 639        {
 640            BYTE chan = ((BYTE)value & 0xc0) >> 6;
 641            /* ctrl byte for specific timer channel */
 642            if (chan == 3)
 643            {
 644                FIXME("8254 timer readback not implemented yet\n");
 645                break;
 646            }
 647            switch (((BYTE)value & 0x30) >> 4)
 648            {
 649            case 0:      /* latch timer */
 650                tmr_8253[chan].latched = TRUE;
 651                dummy_ctr -= 1 + (int)(10.0 * rand() / (RAND_MAX + 1.0));
 652                if (chan == 0) /* System timer divisor */
 653                    tmr_8253[chan].latch = dummy_ctr + (WORD)DOSVM_GetTimer();
 654                else
 655                {
 656                    /* FIXME: intelligent hardware timer emulation needed */
 657                    tmr_8253[chan].latch = dummy_ctr;
 658                }
 659                break;
 660            case 3:      /* write lo byte, then hi byte */
 661                tmr_8253[chan].byte_toggle = FALSE; /* init */
 662                /* fall through */
 663            case 1:      /* write lo byte only */
 664            case 2:      /* write hi byte only */
 665                tmr_8253[chan].ctrlbyte_ch = (BYTE)value;
 666                break;
 667            }
 668        }
 669        break;
 670     case 0x61:
 671         parport_8255[1] = (BYTE)value;
 672         if (((parport_8255[1] & 3) == 3) && (tmr_8253[2].countmax != 1))
 673         {
 674             TRACE("Beep (freq: %d) !\n", 1193180 / tmr_8253[2].countmax);
 675             Beep(1193180 / tmr_8253[2].countmax, 20);
 676         }
 677         break;
 678     case 0x70:
 679         cmosaddress = (BYTE)value & 0x7f;
 680         break;
 681     case 0x71:
 682         if (!cmos_image_initialized)
 683         {
 684             IO_FixCMOSCheckSum();
 685             cmos_image_initialized = 1;
 686         }
 687         cmosimage[cmosaddress & 0x3f] = (BYTE)value;
 688         break;
 689     case 0x226:
 690     case 0x22c:
 691         SB_ioport_out( port, (BYTE)value );
 692         break;
 693     /* VGA Write registers */
 694     case 0x3b4:  /* CRT Controller Register - Index (MDA) */
 695     case 0x3b5:  /* CRT Controller Register - Other (MDA) */
 696     case 0x3ba:  /* General Register - Feature Control */
 697     case 0x3c0:  /* Attribute Controller - Address/Other */
 698     case 0x3c1:
 699     case 0x3c2:  /* General Register - Misc output */
 700     case 0x3c3:  /* General Register - Video subsystem enable */
 701     case 0x3c4:  /* Sequencer Register - Address */
 702     case 0x3c5:  /* Sequencer Register - Other */
 703     case 0x3c6:
 704     case 0x3c7:
 705     case 0x3c8:
 706     case 0x3c9:
 707     case 0x3ca:
 708     case 0x3cb:
 709     case 0x3cc:
 710     case 0x3cd:
 711     case 0x3ce:  /* Graphics Controller Register - Address */
 712     case 0x3cf:  /* Graphics Controller Register - Other */
 713     case 0x3d0:
 714     case 0x3d1:
 715     case 0x3d2:
 716     case 0x3d3:
 717     case 0x3d4:  /* CRT Controller Register - Index (CGA) */
 718     case 0x3d5:  /* CRT Controller Register - Other (CGA) */
 719     case 0x3d6:
 720     case 0x3d7:
 721     case 0x3d8:
 722     case 0x3d9:
 723     case 0x3da:
 724     case 0x3db:
 725     case 0x3dc:
 726     case 0x3dd:
 727     case 0x3de:
 728     case 0x3df:
 729         VGA_ioport_out( port, LOBYTE(value) );
 730         if(size > 1) {
 731             VGA_ioport_out( port+1, HIBYTE(value) );
 732             if(size > 2) {
 733                 VGA_ioport_out( port+2, LOBYTE(HIWORD(value)) );
 734                 VGA_ioport_out( port+3, HIBYTE(HIWORD(value)) );
 735             }
 736         }
 737         break;
 738     case 0x00:
 739     case 0x01:
 740     case 0x02:
 741     case 0x03:
 742     case 0x04:
 743     case 0x05:
 744     case 0x06:
 745     case 0x07:
 746     case 0xC0:
 747     case 0xC2:
 748     case 0xC4:
 749     case 0xC6:
 750     case 0xC8:
 751     case 0xCA:
 752     case 0xCC:
 753     case 0xCE:
 754     case 0x87:
 755     case 0x83:
 756     case 0x81:
 757     case 0x82:
 758     case 0x8B:
 759     case 0x89:
 760     case 0x8A:
 761     case 0x487:
 762     case 0x483:
 763     case 0x481:
 764     case 0x482:
 765     case 0x48B:
 766     case 0x489:
 767     case 0x48A:
 768     case 0x08:
 769     case 0xD0:
 770     case 0x0B:
 771     case 0xD6:
 772     case 0x0A:
 773     case 0xD4:
 774     case 0x0F:
 775     case 0xDE:
 776     case 0x09:
 777     case 0xD2:
 778     case 0x0C:
 779     case 0xD8:
 780     case 0x0D:
 781     case 0xDA:
 782     case 0x0E:
 783     case 0xDC:
 784         DMA_ioport_out( port, (BYTE)value );
 785         break;
 786     default:
 787         WARN("Direct I/O write attempted to port %x\n", port );
 788         break;
 789     }
 790 }