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- /* MS-DOS specific Lisp utilities. Coded by Manabu Higashida, 1991.
- Major changes May-July 1993 Morten Welinder (only 10% original code left)
- Copyright (C) 1991, 1993 Free Software Foundation, Inc.
-
- This file is part of GNU Emacs.
-
- GNU Emacs is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 1, or (at your option)
- any later version.
-
- GNU Emacs is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with GNU Emacs; see the file COPYING. If not, write to
- the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
-
-
- #include <config.h>
-
- #ifdef MSDOS
- /* The entire file is within this conditional */
-
- #include <stdio.h>
- #include <dos.h>
- #include "lisp.h"
- #include "buffer.h"
- #include "termchar.h"
- #include "termhooks.h"
- #include "frame.h"
- #include "dosfns.h"
- #include "msdos.h"
-
- DEFUN ("mode25", Fmode25, Smode25, 0, 0, "", "\
- Changes the number of rows to 25.")
- ()
- {
- union REGS regs;
-
- #ifdef HAVE_X_WINDOWS
- if (!inhibit_window_system)
- return Qnil;
- #endif
- if (have_mouse) mouse_off ();
- regs.x.ax = 3;
- int86 (0x10, ®s, ®s);
- regs.x.ax = 0x1101;
- regs.h.bl = 0;
- int86 (0x10, ®s, ®s);
- regs.x.ax = 0x1200;
- regs.h.bl = 32;
- int86 (0x10, ®s, ®s);
- regs.x.ax = 3;
- int86 (0x10, ®s, ®s);
- Fset_frame_size (Fselected_frame (), ScreenCols (), ScreenRows ());
- Frecenter (Qnil);
- Fredraw_display ();
- if (have_mouse) mouse_init ();
- return Qnil;
- }
-
- DEFUN ("mode4350", Fmode4350, Smode4350, 0, 0, "", "\
- Changes the number of rows to 43 (EGA) or 50 (VGA).")
- ()
- {
- union REGS regs;
-
- #ifdef HAVE_X_WINDOWS
- if (!inhibit_window_system)
- return Qnil;
- #endif
- if (have_mouse) mouse_off ();
- regs.x.ax = 3;
- int86 (0x10, ®s, ®s);
- regs.x.ax = 0x1112;
- regs.h.bl = 0;
- int86 (0x10, ®s, ®s);
- regs.x.ax = 0x1200;
- regs.h.bl = 32;
- int86 (0x10, ®s, ®s);
- regs.x.ax = 0x0100;
- regs.x.cx = 7;
- int86 (0x10, ®s, ®s);
- Fset_frame_size (Fselected_frame (), ScreenCols (), ScreenRows ());
- Frecenter (Qnil);
- Fredraw_display ();
- if (have_mouse) mouse_init ();
- return Qnil;
- }
-
- DEFUN ("int86", Fint86, Sint86, 2, 2, 0,
- "Call specific MSDOS interrupt number INTERRUPT with REGISTERS.\n\
- Return the updated REGISTER vector.\n\
- \n\
- INTERRUPT should be an integer in the range 0 to 255.\n\
- REGISTERS should be a vector produced by `make-register' and\n\
- `set-register-value'.")
- (intno, regs)
- Lisp_Object intno, regs;
- {
- register int i;
- int no;
- union REGS inregs, outregs;
- Lisp_Object val;
-
- CHECK_NUMBER (intno, 0);
- no = (unsigned long) XINT (intno);
- CHECK_VECTOR (regs, 1);
- if (no < 0 || no > 0xff || XVECTOR (regs)-> size != 8)
- return Qnil;
- for (i = 0; i < 8; i++)
- CHECK_NUMBER (XVECTOR (regs)->contents[i], 1);
-
- inregs.x.ax = (unsigned long) XFASTINT (XVECTOR (regs)->contents[0]);
- inregs.x.bx = (unsigned long) XFASTINT (XVECTOR (regs)->contents[1]);
- inregs.x.cx = (unsigned long) XFASTINT (XVECTOR (regs)->contents[2]);
- inregs.x.dx = (unsigned long) XFASTINT (XVECTOR (regs)->contents[3]);
- inregs.x.si = (unsigned long) XFASTINT (XVECTOR (regs)->contents[4]);
- inregs.x.di = (unsigned long) XFASTINT (XVECTOR (regs)->contents[5]);
- inregs.x.cflag = (unsigned long) XFASTINT (XVECTOR (regs)->contents[6]);
- inregs.x.flags = (unsigned long) XFASTINT (XVECTOR (regs)->contents[7]);
-
- int86 (no, &inregs, &outregs);
-
- XVECTOR (regs)->contents[0] = make_number (outregs.x.ax);
- XVECTOR (regs)->contents[1] = make_number (outregs.x.bx);
- XVECTOR (regs)->contents[2] = make_number (outregs.x.cx);
- XVECTOR (regs)->contents[3] = make_number (outregs.x.dx);
- XVECTOR (regs)->contents[4] = make_number (outregs.x.si);
- XVECTOR (regs)->contents[5] = make_number (outregs.x.di);
- XVECTOR (regs)->contents[6] = make_number (outregs.x.cflag);
- XVECTOR (regs)->contents[7] = make_number (outregs.x.flags);
-
- return regs;
- }
-
- int dos_country_code;
- int dos_codepage;
- Lisp_Object Vdos_version;
-
- void
- init_dosfns ()
- {
- union REGS regs;
- _go32_dpmi_seginfo info;
- _go32_dpmi_registers dpmiregs;
-
- get_lim_data (); /* why the hell isn't this called elsewhere? */
-
- regs.x.ax = 0x3000;
- intdos (®s, ®s);
- Vdos_version = Fcons (make_number (regs.h.al), make_number (regs.h.ah));
-
- /* Obtain the country code by calling Dos via Dpmi. Don't rely on GO32. */
- info.size = (34 + 15) / 16;
- if (_go32_dpmi_allocate_dos_memory (&info))
- dos_country_code = 1;
- else
- {
- dpmiregs.x.ax = 0x3800;
- dpmiregs.x.ds = info.rm_segment;
- dpmiregs.x.dx = 0;
- dpmiregs.x.ss = dpmiregs.x.sp = 0;
- _go32_dpmi_simulate_int (0x21, &dpmiregs);
- dos_country_code = dpmiregs.x.bx;
- _go32_dpmi_free_dos_memory (&info);
- }
-
- regs.x.ax = 0x6601;
- intdos (®s, ®s);
- if (regs.x.cflag)
- /* Estimate code page from country code */
- switch (dos_country_code)
- {
- case 45: /* Denmark */
- case 47: /* Norway */
- dos_codepage = 865;
- break;
- default:
- /* US */
- dos_codepage = 437;
- }
- else
- dos_codepage = regs.x.bx & 0xffff;
- }
-
- /*
- * Define everything
- */
- syms_of_dosfns ()
- {
- defsubr (&Smode25);
- defsubr (&Smode4350);
- defsubr (&Sint86);
-
- DEFVAR_INT ("dos-country-code", &dos_country_code,
- "The country code returned by Dos when Emacs was started.\n\
- Usually this is the international telephone prefix.");
-
- DEFVAR_INT ("dos-codepage", &dos_codepage,
- "The codepage active when Emacs was started.\n\
- The following are known:\n\
- 437 United States\n\
- 850 Multilingual (Latin I)\n\
- 852 Slavic (Latin II)\n\
- 857 Turkish\n\
- 860 Portugal\n\
- 861 Iceland\n\
- 863 Canada (French)\n\
- 865 Norway/Denmark");
-
- DEFVAR_LISP ("dos-version", &Vdos_version,
- "The (MAJOR . MINOR) Dos version (subject to modification with setver).");
- }
- #endif /* MSDOS */
-