src/dosfns.c

   1 /* MS-DOS specific Lisp utilities.  Coded by Manabu Higashida, 1991.
   2    Major changes May-July 1993 Morten Welinder (only 10% original code left)
   3    Copyright (C) 1991, 1993, 1996, 1997, 1998, 2001
   4    Free Software Foundation, Inc.
   5
   6 This file is part of GNU Emacs.
   7
   8 GNU Emacs is free software; you can redistribute it and/or modify
   9 it under the terms of the GNU General Public License as published by
  10 the Free Software Foundation; either version 2, or (at your option)
  11 any later version.
  12
  13 GNU Emacs is distributed in the hope that it will be useful,
  14 but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 GNU General Public License for more details.
  17
  18 You should have received a copy of the GNU General Public License
  19 along with GNU Emacs; see the file COPYING.  If not, write to
  20 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  21 Boston, MA 02111-1307, USA.  */
  22
  23
  24 #include <config.h>
  25
  26 #ifdef MSDOS
  27 /* The entire file is within this conditional */
  28
  29 #include <stdio.h>
  30 #include <string.h>
  31 #include <dos.h>
  32 #include "lisp.h"
  33 #include "buffer.h"
  34 #include "termchar.h"
  35 #include "termhooks.h"
  36 #include "frame.h"
  37 #include "blockinput.h"
  38 #include "window.h"
  39 #include "dosfns.h"
  40 #include "msdos.h"
  41 #include "dispextern.h"
  42 #include "charset.h"
  43 #include "coding.h"
  44 #include <dpmi.h>
  45 #include <go32.h>
  46 #include <dirent.h>
  47 #include <sys/vfs.h>
  48
  49 #ifndef __DJGPP_MINOR__
  50 # define __tb _go32_info_block.linear_address_of_transfer_buffer;
  51 #endif
  52
  53 DEFUN ("int86", Fint86, Sint86, 2, 2, 0,
  54        doc: /* Call specific MSDOS interrupt number INTERRUPT with REGISTERS.
  55 Return the updated REGISTER vector.
  56
  57 INTERRUPT should be an integer in the range 0 to 255.
  58 REGISTERS should be a vector produced by `make-register' and
  59 `set-register-value'.  */)
  60      (interrupt, registers)
  61      Lisp_Object interrupt, registers;
  62 {
  63   register int i;
  64   int no;
  65   union REGS inregs, outregs;
  66   Lisp_Object val;
  67
  68   CHECK_NUMBER (interrupt);
  69   no = (unsigned long) XINT (interrupt);
  70   CHECK_VECTOR (registers);
  71   if (no < 0 || no > 0xff || XVECTOR (registers)-> size != 8)
  72     return Qnil;
  73   for (i = 0; i < 8; i++)
  74     CHECK_NUMBER (XVECTOR (registers)->contents[i]);
  75
  76   inregs.x.ax    = (unsigned long) XFASTINT (XVECTOR (registers)->contents[0]);
  77   inregs.x.bx    = (unsigned long) XFASTINT (XVECTOR (registers)->contents[1]);
  78   inregs.x.cx    = (unsigned long) XFASTINT (XVECTOR (registers)->contents[2]);
  79   inregs.x.dx    = (unsigned long) XFASTINT (XVECTOR (registers)->contents[3]);
  80   inregs.x.si    = (unsigned long) XFASTINT (XVECTOR (registers)->contents[4]);
  81   inregs.x.di    = (unsigned long) XFASTINT (XVECTOR (registers)->contents[5]);
  82   inregs.x.cflag = (unsigned long) XFASTINT (XVECTOR (registers)->contents[6]);
  83   inregs.x.flags = (unsigned long) XFASTINT (XVECTOR (registers)->contents[7]);
  84
  85   int86 (no, &inregs, &outregs);
  86
  87   XVECTOR (registers)->contents[0] = make_number (outregs.x.ax);
  88   XVECTOR (registers)->contents[1] = make_number (outregs.x.bx);
  89   XVECTOR (registers)->contents[2] = make_number (outregs.x.cx);
  90   XVECTOR (registers)->contents[3] = make_number (outregs.x.dx);
  91   XVECTOR (registers)->contents[4] = make_number (outregs.x.si);
  92   XVECTOR (registers)->contents[5] = make_number (outregs.x.di);
  93   XVECTOR (registers)->contents[6] = make_number (outregs.x.cflag);
  94   XVECTOR (registers)->contents[7] = make_number (outregs.x.flags);
  95
  96   return registers;
  97 }
  98
  99 DEFUN ("msdos-memget", Fdos_memget, Sdos_memget, 2, 2, 0,
 100        doc: /* Read DOS memory at offset ADDRESS into VECTOR.
 101 Return the updated VECTOR.  */)
 102      (address, vector)
 103      Lisp_Object address, vector;
 104 {
 105   register int i;
 106   int offs, len;
 107   char *buf;
 108   Lisp_Object val;
 109
 110   CHECK_NUMBER (address);
 111   offs = (unsigned long) XINT (address);
 112   CHECK_VECTOR (vector);
 113   len = XVECTOR (vector)-> size;
 114   if (len < 1 || len > 2048 || address < 0 || address > 0xfffff - len)
 115     return Qnil;
 116   buf = alloca (len);
 117   dosmemget (offs, len, buf);
 118
 119   for (i = 0; i < len; i++)
 120     XVECTOR (vector)->contents[i] = make_number (buf[i]);
 121
 122   return vector;
 123 }
 124
 125 DEFUN ("msdos-memput", Fdos_memput, Sdos_memput, 2, 2, 0,
 126        doc: /* Write DOS memory at offset ADDRESS from VECTOR.  */)
 127      (address, vector)
 128      Lisp_Object address, vector;
 129 {
 130   register int i;
 131   int offs, len;
 132   char *buf;
 133   Lisp_Object val;
 134
 135   CHECK_NUMBER (address);
 136   offs = (unsigned long) XINT (address);
 137   CHECK_VECTOR (vector);
 138   len = XVECTOR (vector)-> size;
 139   if (len < 1 || len > 2048 || address < 0 || address > 0xfffff - len)
 140     return Qnil;
 141   buf = alloca (len);
 142
 143   for (i = 0; i < len; i++)
 144     {
 145       CHECK_NUMBER (XVECTOR (vector)->contents[i]);
 146       buf[i] = (unsigned char) XFASTINT (XVECTOR (vector)->contents[i]) & 0xFF;
 147     }
 148
 149   dosmemput (buf, len, offs);
 150   return Qt;
 151 }
 152
 153 DEFUN ("msdos-set-keyboard", Fmsdos_set_keyboard, Smsdos_set_keyboard, 1, 2, 0,
 154        doc: /* Set keyboard layout according to COUNTRY-CODE.
 155 If the optional argument ALLKEYS is non-nil, the keyboard is mapped for
 156 all keys; otherwise it is only used when the ALT key is pressed.
 157 The current keyboard layout is available in dos-keyboard-code.  */)
 158      (country_code, allkeys)
 159      Lisp_Object country_code;
 160 {
 161   CHECK_NUMBER (country_code);
 162   if (!dos_set_keyboard (XINT (country_code), !NILP (allkeys)))
 163     return Qnil;
 164   return Qt;
 165 }
 166
 167 #ifndef HAVE_X_WINDOWS
 168 /* Later we might want to control the mouse interface with this function,
 169    e.g., with respect to non-80 column screen modes.  */
 170
 171 DEFUN ("msdos-mouse-p", Fmsdos_mouse_p, Smsdos_mouse_p, 0, 0, 0,
 172        doc: /* Report whether a mouse is present.  */)
 173      ()
 174 {
 175   if (have_mouse)
 176     return Qt;
 177   else
 178     return Qnil;
 179 }
 180 #endif
 181
 182
 183 DEFUN ("msdos-mouse-init", Fmsdos_mouse_init, Smsdos_mouse_init, 0, 0, "",
 184        doc: /* Initialize and enable mouse if available.  */)
 185      ()
 186 {
 187   if (have_mouse)
 188     {
 189       have_mouse = 1;
 190       mouse_init ();
 191       return Qt;
 192     }
 193   return Qnil;
 194 }
 195
 196 DEFUN ("msdos-mouse-enable", Fmsdos_mouse_enable, Smsdos_mouse_enable, 0, 0, "",
 197        doc: /* Enable mouse if available.  */)
 198      ()
 199 {
 200   if (have_mouse)
 201     {
 202       have_mouse = 1;
 203       mouse_on ();
 204     }
 205   return have_mouse ? Qt : Qnil;
 206 }
 207
 208 DEFUN ("msdos-mouse-disable", Fmsdos_mouse_disable, Smsdos_mouse_disable, 0, 0, "",
 209        doc: /* Disable mouse if available.  */)
 210      ()
 211 {
 212   mouse_off ();
 213   if (have_mouse) have_mouse = -1;
 214   return Qnil;
 215 }
 216
 217 DEFUN ("insert-startup-screen", Finsert_startup_screen, Sinsert_startup_screen, 0, 0, "",
 218        doc: /* Insert copy of screen contents prior to starting emacs.
 219 Return nil if startup screen is not available.  */)
 220      ()
 221 {
 222   char *s;
 223   int rows, cols;
 224   int i, j;
 225
 226   if (!dos_get_saved_screen (&s, &rows, &cols))
 227     return Qnil;
 228
 229   for (i = 0; i < rows; i++)
 230     {
 231       for (j = 0; j < cols; j++)
 232         {
 233           insert_char (*s);
 234           s += 2;
 235         }
 236       insert_char ('\n');
 237     }
 238
 239   return Qt;
 240 }
 241 \f
 242 /* country info */
 243 EMACS_INT dos_country_code;
 244 EMACS_INT dos_codepage;
 245 EMACS_INT dos_timezone_offset;
 246 EMACS_INT dos_decimal_point;
 247 EMACS_INT dos_keyboard_layout;
 248 unsigned char dos_country_info[DOS_COUNTRY_INFO];
 249 static unsigned char usa_country_info[DOS_COUNTRY_INFO] = {
 250   0, 0,                         /* date format */
 251   '$', 0, 0, 0, 0,              /* currency string */
 252   ',', 0,                       /* thousands separator */
 253   '.', 0,                       /* decimal separator */
 254   '/', 0,                       /* date separator */
 255   ':', 0,                       /* time separator */
 256   0,                            /* currency format */
 257   2,                            /* digits after decimal in currency */
 258   0,                            /* time format */
 259   0, 0, 0, 0,                   /* address of case map routine, GPF if used */
 260   ' ', 0,                       /* data-list separator (?) */
 261   0, 0, 0, 0, 0, 0, 0, 0, 0, 0  /* reserved */
 262 };
 263
 264 EMACS_INT dos_hyper_key;
 265 EMACS_INT dos_super_key;
 266 EMACS_INT dos_keypad_mode;
 267
 268 Lisp_Object Vdos_version;
 269 Lisp_Object Vdos_display_scancodes;
 270
 271 #ifndef HAVE_X_WINDOWS
 272 static unsigned dos_windows_version;
 273 Lisp_Object Vdos_windows_version;
 274
 275 char parent_vm_title[50];       /* Ralf Brown says 30 is enough */
 276 int w95_set_virtual_machine_title (const char *);
 277
 278 void
 279 restore_parent_vm_title (void)
 280 {
 281   if (NILP (Vdos_windows_version))
 282     return;
 283   if ((dos_windows_version & 0xff) >= 4 && parent_vm_title[0])
 284     w95_set_virtual_machine_title (parent_vm_title);
 285   delay (50);
 286 }
 287 #endif /* !HAVE_X_WINDOWS */
 288
 289 void
 290 init_dosfns ()
 291 {
 292   union REGS regs;
 293   _go32_dpmi_registers dpmiregs;
 294   unsigned long xbuf = _go32_info_block.linear_address_of_transfer_buffer;
 295
 296 #ifndef SYSTEM_MALLOC
 297   get_lim_data (); /* why the hell isn't this called elsewhere? */
 298 #endif
 299
 300   regs.x.ax = 0x3000;
 301   intdos (&regs, &regs);
 302   Vdos_version = Fcons (make_number (regs.h.al), make_number (regs.h.ah));
 303
 304   /* Obtain the country code via DPMI, use DJGPP transfer buffer.  */
 305   dpmiregs.x.ax = 0x3800;
 306   dpmiregs.x.ds = xbuf >> 4;
 307   dpmiregs.x.dx = 0;
 308   dpmiregs.x.ss = dpmiregs.x.sp = dpmiregs.x.flags = 0;
 309   _go32_dpmi_simulate_int (0x21, &dpmiregs);
 310   if (dpmiregs.x.flags & 1)
 311     {
 312       dos_country_code = 1;     /* assume USA if 213800 failed */
 313       memcpy (dos_country_info, usa_country_info, DOS_COUNTRY_INFO);
 314     }
 315   else
 316     {
 317       dos_country_code = dpmiregs.x.bx;
 318       dosmemget (xbuf, DOS_COUNTRY_INFO, dos_country_info);
 319     }
 320
 321   dos_set_keyboard (dos_country_code, 0);
 322
 323   regs.x.ax = 0x6601;
 324   intdos (&regs, &regs);
 325   if (regs.x.cflag)
 326     /* Estimate code page from country code */
 327     switch (dos_country_code)
 328       {
 329       case 45: /* Denmark */
 330       case 47: /* Norway */
 331         dos_codepage = 865;
 332         break;
 333       default:
 334         /* US */
 335         dos_codepage = 437;
 336       }
 337   else
 338     dos_codepage = regs.x.bx & 0xffff;
 339
 340 #ifndef HAVE_X_WINDOWS
 341   parent_vm_title[0] = '\0';
 342
 343   /* If we are running from DOS box on MS-Windows, get Windows version.  */
 344   dpmiregs.x.ax = 0x1600;       /* enhanced mode installation check */
 345   dpmiregs.x.ss = dpmiregs.x.sp = dpmiregs.x.flags = 0;
 346   _go32_dpmi_simulate_int (0x2f, &dpmiregs);
 347   /* We only support Windows-specific features when we run on Windows 9X
 348      or on Windows 3.X/enhanced mode.
 349
 350      Int 2Fh/AX=1600h returns:
 351
 352      AL = 00:  no Windows at all;
 353      AL = 01:  Windows/386 2.x;
 354      AL = 80h: Windows 3.x in mode other than enhanced;
 355      AL = FFh: Windows/386 2.x
 356
 357      We also check AH > 0 (Windows 3.1 or later), in case AL tricks us.  */
 358   if (dpmiregs.h.al > 2 && dpmiregs.h.al != 0x80 && dpmiregs.h.al != 0xff
 359       && (dpmiregs.h.al > 3 || dpmiregs.h.ah > 0))
 360     {
 361       dos_windows_version = dpmiregs.x.ax;
 362       Vdos_windows_version =
 363         Fcons (make_number (dpmiregs.h.al), make_number (dpmiregs.h.ah));
 364
 365       /* Save the current title of this virtual machine, so we can restore
 366          it before exiting.  Otherwise, Windows 95 will continue to use
 367          the title we set even after we are history, stupido...  */
 368       if (dpmiregs.h.al >= 4)
 369         {
 370           dpmiregs.x.ax = 0x168e;
 371           dpmiregs.x.dx = 3;    /* get VM title */
 372           dpmiregs.x.cx = sizeof(parent_vm_title) - 1;
 373           dpmiregs.x.es = __tb >> 4;
 374           dpmiregs.x.di = __tb & 15;
 375           dpmiregs.x.sp = dpmiregs.x.ss = dpmiregs.x.flags = 0;
 376           _go32_dpmi_simulate_int (0x2f, &dpmiregs);
 377           if (dpmiregs.x.ax == 1)
 378             dosmemget (__tb, sizeof(parent_vm_title), parent_vm_title);
 379         }
 380     }
 381   else
 382     {
 383       dos_windows_version = 0;
 384       Vdos_windows_version = Qnil;
 385     }
 386 #endif /* !HAVE_X_WINDOWS */
 387
 388 #if __DJGPP__ >= 2
 389
 390   /* Without this, we never see hidden files.
 391      Don't OR it with the previous value, so the value recorded at dump
 392      time, possibly with `preserve-case' flags set, won't get through.  */
 393   __opendir_flags = __OPENDIR_FIND_HIDDEN;
 394
 395 #if __DJGPP_MINOR__ == 0
 396   /* Under LFN, preserve the case of files as recorded in the directory
 397      (in DJGPP 2.01 and later this is automagically done by the library).  */
 398   if (!NILP (Fmsdos_long_file_names ()))
 399     __opendir_flags |= __OPENDIR_PRESERVE_CASE;
 400 #endif /* __DJGPP_MINOR__ == 0 */
 401 #endif /* __DJGPP__ >= 2 */
 402 }
 403 \f
 404 #ifndef HAVE_X_WINDOWS
 405
 406 /* Emulation of some X window features from xfns.c and xfaces.c.  */
 407
 408 /* Standard VGA colors, in the order of their standard numbering
 409    in the default VGA palette.  */
 410 static char *vga_colors[16] = {
 411   "black", "blue", "green", "cyan", "red", "magenta", "brown",
 412   "lightgray", "darkgray", "lightblue", "lightgreen", "lightcyan",
 413   "lightred", "lightmagenta", "yellow", "white"
 414 };
 415
 416 /* Given a color name, return its index, or -1 if not found.  Note
 417    that this only performs case-insensitive comparison against the
 418    standard names.  For anything more sophisticated, like matching
 419    "gray" with "grey" or translating X color names into their MSDOS
 420    equivalents, call the Lisp function Qtty_color_desc (defined
 421    on lisp/term/tty-colors.el).  */
 422 int
 423 msdos_stdcolor_idx (const char *name)
 424 {
 425   int i;
 426
 427   for (i = 0; i < sizeof (vga_colors) / sizeof (vga_colors[0]); i++)
 428     if (strcasecmp (name, vga_colors[i]) == 0)
 429       return i;
 430
 431   return
 432     strcmp (name, unspecified_fg) == 0 ? FACE_TTY_DEFAULT_FG_COLOR
 433     : strcmp (name, unspecified_bg) == 0 ? FACE_TTY_DEFAULT_BG_COLOR
 434     : FACE_TTY_DEFAULT_COLOR;
 435 }
 436
 437 /* Given a color index, return its standard name.  */
 438 Lisp_Object
 439 msdos_stdcolor_name (int idx)
 440 {
 441   extern Lisp_Object Qunspecified;
 442
 443   if (idx == FACE_TTY_DEFAULT_FG_COLOR)
 444     return build_string (unspecified_fg);
 445   else if (idx == FACE_TTY_DEFAULT_BG_COLOR)
 446     return build_string (unspecified_bg);
 447   else if (idx >= 0 && idx < sizeof (vga_colors) / sizeof (vga_colors[0]))
 448     return build_string (vga_colors[idx]);
 449   else
 450     return Qunspecified;        /* meaning the default */
 451 }
 452
 453 /* Support for features that are available when we run in a DOS box
 454    on MS-Windows.  */
 455 int
 456 ms_windows_version (void)
 457 {
 458   return dos_windows_version;
 459 }
 460
 461 /* Set the title of the current virtual machine, to appear on
 462    the caption bar of that machine's window.  */
 463
 464 int
 465 w95_set_virtual_machine_title (const char *title_string)
 466 {
 467   /* Only Windows 9X (version 4 and higher) support this function.  */
 468   if (!NILP (Vdos_windows_version)
 469       && (dos_windows_version & 0xff) >= 4)
 470     {
 471       _go32_dpmi_registers regs;
 472       dosmemput (title_string, strlen (title_string) + 1, __tb);
 473       regs.x.ax = 0x168e;
 474       regs.x.dx = 1;
 475       regs.x.es = __tb >> 4;
 476       regs.x.di = __tb & 15;
 477       regs.x.sp = regs.x.ss = regs.x.flags = 0;
 478       _go32_dpmi_simulate_int (0x2f, &regs);
 479       return regs.x.ax == 1;
 480     }
 481   return 0;
 482 }
 483
 484 /* Change the title of frame F to NAME.
 485    If NAME is nil, use the frame name as the title.
 486
 487    If Emacs is not run from a DOS box on Windows 9X, this only
 488    sets the name in the frame struct, but has no other effects.  */
 489
 490 void
 491 x_set_title (f, name)
 492      struct frame *f;
 493      Lisp_Object name;
 494 {
 495   /* Don't change the title if it's already NAME.  */
 496   if (EQ (name, f->title))
 497     return;
 498
 499   update_mode_lines = 1;
 500
 501   f->title = name;
 502
 503   if (NILP (name))
 504     name = f->name;
 505
 506   if (FRAME_MSDOS_P (f))
 507     {
 508       BLOCK_INPUT;
 509       w95_set_virtual_machine_title (XSTRING (name)->data);
 510       UNBLOCK_INPUT;
 511     }
 512 }
 513 #endif /* !HAVE_X_WINDOWS */
 514 \f
 515 DEFUN ("file-system-info", Ffile_system_info, Sfile_system_info, 1, 1, 0,
 516        doc: /* Return storage information about the file system FILENAME is on.
 517 Value is a list of floats (TOTAL FREE AVAIL), where TOTAL is the total
 518 storage of the file system, FREE is the free storage, and AVAIL is the
 519 storage available to a non-superuser.  All 3 numbers are in bytes.
 520 If the underlying system call fails, value is nil.  */)
 521      (filename)
 522      Lisp_Object filename;
 523 {
 524   struct statfs stfs;
 525   Lisp_Object encoded, value;
 526
 527   CHECK_STRING (filename);
 528   filename = Fexpand_file_name (filename, Qnil);
 529   encoded = ENCODE_FILE (filename);
 530
 531   if (statfs (XSTRING (encoded)->data, &stfs))
 532     value = Qnil;
 533   else
 534     value = list3 (make_float ((double) stfs.f_bsize * stfs.f_blocks),
 535                    make_float ((double) stfs.f_bsize * stfs.f_bfree),
 536                    make_float ((double) stfs.f_bsize * stfs.f_bavail));
 537
 538   return value;
 539 }
 540 \f
 541 void
 542 dos_cleanup (void)
 543 {
 544 #ifndef HAVE_X_WINDOWS
 545   restore_parent_vm_title ();
 546 #endif
 547   /* Make sure the termscript file is committed, in case we are
 548      crashing and some vital info was written there.  */
 549   if (termscript)
 550     {
 551       fflush (termscript);
 552       fsync (fileno (termscript));
 553     }
 554 }
 555
 556 /*
 557  *      Define everything
 558  */
 559 syms_of_dosfns ()
 560 {
 561   defsubr (&Sint86);
 562   defsubr (&Sdos_memget);
 563   defsubr (&Sdos_memput);
 564   defsubr (&Smsdos_mouse_init);
 565   defsubr (&Smsdos_mouse_enable);
 566   defsubr (&Smsdos_set_keyboard);
 567   defsubr (&Sinsert_startup_screen);
 568   defsubr (&Smsdos_mouse_disable);
 569   defsubr (&Sfile_system_info);
 570 #ifndef HAVE_X_WINDOWS
 571   defsubr (&Smsdos_mouse_p);
 572 #endif
 573
 574   DEFVAR_INT ("dos-country-code", &dos_country_code,
 575               doc: /* The country code returned by Dos when Emacs was started.
 576 Usually this is the international telephone prefix.  */);
 577
 578   DEFVAR_INT ("dos-codepage", &dos_codepage,
 579               doc: /* The codepage active when Emacs was started.
 580 The following are known:
 581         437     United States
 582         850     Multilingual (Latin I)
 583         852     Slavic (Latin II)
 584         857     Turkish
 585         860     Portugal
 586         861     Iceland
 587         863     Canada (French)
 588         865     Norway/Denmark  */);
 589
 590   DEFVAR_INT ("dos-timezone-offset", &dos_timezone_offset,
 591               doc: /* The current timezone offset to UTC in minutes.
 592 Implicitly modified when the TZ variable is changed.  */);
 593
 594   DEFVAR_LISP ("dos-version", &Vdos_version,
 595                doc: /* The (MAJOR . MINOR) Dos version (subject to modification with setver).  */);
 596
 597 #ifndef HAVE_X_WINDOWS
 598   DEFVAR_LISP ("dos-windows-version", &Vdos_windows_version,
 599                doc: /* The (MAJOR . MINOR) Windows version for DOS session on MS-Windows.  */);
 600 #endif
 601
 602   DEFVAR_LISP ("dos-display-scancodes", &Vdos_display_scancodes,
 603                doc: /* *Controls whether DOS raw keyboard events are displayed as you type.
 604 When non-nil, the keyboard scan-codes are displayed at the bottom right
 605 corner of the display (typically at the end of the mode line).
 606 The output format is: scan code:char code*modifiers.  */);
 607
 608   Vdos_display_scancodes = Qnil;
 609
 610   DEFVAR_INT ("dos-hyper-key", &dos_hyper_key,
 611               doc: /* *If set to 1, use right ALT key as hyper key.
 612 If set to 2, use right CTRL key as hyper key.  */);
 613   dos_hyper_key = 0;
 614
 615   DEFVAR_INT ("dos-super-key", &dos_super_key,
 616               doc: /* *If set to 1, use right ALT key as super key.
 617 If set to 2, use right CTRL key as super key.  */);
 618   dos_super_key = 0;
 619
 620   DEFVAR_INT ("dos-keypad-mode", &dos_keypad_mode,
 621               doc: /* *Controls what key code is returned by a key in the numeric keypad.
 622 The `numlock ON' action is only taken if no modifier keys are pressed.
 623 The value is an integer constructed by adding the following bits together:
 624
 625   0x00  Digit key returns digit    (if numlock ON)
 626   0x01  Digit key returns kp-digit (if numlock ON)
 627   0x02  Digit key returns M-digit  (if numlock ON)
 628   0x03  Digit key returns edit key (if numlock ON)
 629
 630   0x00  Grey key returns char      (if numlock ON)
 631   0x04  Grey key returns kp-key    (if numlock ON)
 632
 633   0x00  Digit key returns digit    (if numlock OFF)
 634   0x10  Digit key returns kp-digit (if numlock OFF)
 635   0x20  Digit key returns M-digit  (if numlock OFF)
 636   0x30  Digit key returns edit key (if numlock OFF)
 637
 638   0x00  Grey key returns char      (if numlock OFF)
 639   0x40  Grey key returns kp-key    (if numlock OFF)
 640
 641   0x200 ALT-0..ALT-9 in top-row produces shifted codes.  */);
 642   dos_keypad_mode = 0x75;
 643
 644   DEFVAR_INT ("dos-keyboard-layout", &dos_keyboard_layout,
 645               doc: /* Contains the country code for the current keyboard layout.
 646 Use msdos-set-keyboard to select another keyboard layout.  */);
 647   dos_keyboard_layout = 1;      /* US */
 648
 649   DEFVAR_INT ("dos-decimal-point", &dos_decimal_point,
 650               doc: /* The character to produce when kp-decimal key is pressed.
 651 If non-zero, this variable contains the character to be returned when the
 652 decimal point key in the numeric keypad is pressed when Num Lock is on.
 653 If zero, the decimal point key returns the country code specific value.  */);
 654   dos_decimal_point = 0;
 655 }
 656 #endif /* MSDOS */