| 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 Free Software Foundation, Inc. |
| 4 | |
| 5 | This file is part of GNU Emacs. |
| 6 | |
| 7 | GNU Emacs is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 1, or (at your option) |
| 10 | any later version. |
| 11 | |
| 12 | GNU Emacs 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 |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with GNU Emacs; see the file COPYING. If not, write to |
| 19 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ |
| 20 | |
| 21 | |
| 22 | #include <config.h> |
| 23 | |
| 24 | #ifdef MSDOS |
| 25 | /* The entire file is within this conditional */ |
| 26 | |
| 27 | #include <stdio.h> |
| 28 | #include <dos.h> |
| 29 | #include "lisp.h" |
| 30 | #include "buffer.h" |
| 31 | #include "termchar.h" |
| 32 | #include "termhooks.h" |
| 33 | #include "frame.h" |
| 34 | #include "dosfns.h" |
| 35 | #include "msdos.h" |
| 36 | |
| 37 | DEFUN ("mode25", Fmode25, Smode25, 0, 0, "", "\ |
| 38 | Changes the number of rows to 25.") |
| 39 | () |
| 40 | { |
| 41 | union REGS regs; |
| 42 | |
| 43 | #ifdef HAVE_X_WINDOWS |
| 44 | if (!inhibit_window_system) |
| 45 | return Qnil; |
| 46 | #endif |
| 47 | if (have_mouse) mouse_off (); |
| 48 | regs.x.ax = 3; |
| 49 | int86 (0x10, ®s, ®s); |
| 50 | regs.x.ax = 0x1101; |
| 51 | regs.h.bl = 0; |
| 52 | int86 (0x10, ®s, ®s); |
| 53 | regs.x.ax = 0x1200; |
| 54 | regs.h.bl = 32; |
| 55 | int86 (0x10, ®s, ®s); |
| 56 | regs.x.ax = 3; |
| 57 | int86 (0x10, ®s, ®s); |
| 58 | Fset_frame_size (Fselected_frame (), ScreenCols (), ScreenRows ()); |
| 59 | Frecenter (Qnil); |
| 60 | Fredraw_display (); |
| 61 | if (have_mouse) mouse_init (); |
| 62 | return Qnil; |
| 63 | } |
| 64 | |
| 65 | DEFUN ("mode4350", Fmode4350, Smode4350, 0, 0, "", "\ |
| 66 | Changes the number of rows to 43 (EGA) or 50 (VGA).") |
| 67 | () |
| 68 | { |
| 69 | union REGS regs; |
| 70 | |
| 71 | #ifdef HAVE_X_WINDOWS |
| 72 | if (!inhibit_window_system) |
| 73 | return Qnil; |
| 74 | #endif |
| 75 | if (have_mouse) mouse_off (); |
| 76 | regs.x.ax = 3; |
| 77 | int86 (0x10, ®s, ®s); |
| 78 | regs.x.ax = 0x1112; |
| 79 | regs.h.bl = 0; |
| 80 | int86 (0x10, ®s, ®s); |
| 81 | regs.x.ax = 0x1200; |
| 82 | regs.h.bl = 32; |
| 83 | int86 (0x10, ®s, ®s); |
| 84 | regs.x.ax = 0x0100; |
| 85 | regs.x.cx = 7; |
| 86 | int86 (0x10, ®s, ®s); |
| 87 | Fset_frame_size (Fselected_frame (), ScreenCols (), ScreenRows ()); |
| 88 | Frecenter (Qnil); |
| 89 | Fredraw_display (); |
| 90 | if (have_mouse) mouse_init (); |
| 91 | return Qnil; |
| 92 | } |
| 93 | |
| 94 | DEFUN ("int86", Fint86, Sint86, 2, 2, 0, |
| 95 | "Call specific MSDOS interrupt number INTERRUPT with REGISTERS.\n\ |
| 96 | Return the updated REGISTER vector.\n\ |
| 97 | \n\ |
| 98 | INTERRUPT should be an integer in the range 0 to 255.\n\ |
| 99 | REGISTERS should be a vector produced by `make-register' and\n\ |
| 100 | `set-register-value'.") |
| 101 | (intno, regs) |
| 102 | Lisp_Object intno, regs; |
| 103 | { |
| 104 | register int i; |
| 105 | int no; |
| 106 | union REGS inregs, outregs; |
| 107 | Lisp_Object val; |
| 108 | |
| 109 | CHECK_NUMBER (intno, 0); |
| 110 | no = (unsigned long) XINT (intno); |
| 111 | CHECK_VECTOR (regs, 1); |
| 112 | if (no < 0 || no > 0xff || XVECTOR (regs)-> size != 8) |
| 113 | return Qnil; |
| 114 | for (i = 0; i < 8; i++) |
| 115 | CHECK_NUMBER (XVECTOR (regs)->contents[i], 1); |
| 116 | |
| 117 | inregs.x.ax = (unsigned long) XFASTINT (XVECTOR (regs)->contents[0]); |
| 118 | inregs.x.bx = (unsigned long) XFASTINT (XVECTOR (regs)->contents[1]); |
| 119 | inregs.x.cx = (unsigned long) XFASTINT (XVECTOR (regs)->contents[2]); |
| 120 | inregs.x.dx = (unsigned long) XFASTINT (XVECTOR (regs)->contents[3]); |
| 121 | inregs.x.si = (unsigned long) XFASTINT (XVECTOR (regs)->contents[4]); |
| 122 | inregs.x.di = (unsigned long) XFASTINT (XVECTOR (regs)->contents[5]); |
| 123 | inregs.x.cflag = (unsigned long) XFASTINT (XVECTOR (regs)->contents[6]); |
| 124 | inregs.x.flags = (unsigned long) XFASTINT (XVECTOR (regs)->contents[7]); |
| 125 | |
| 126 | int86 (no, &inregs, &outregs); |
| 127 | |
| 128 | XVECTOR (regs)->contents[0] = make_number (outregs.x.ax); |
| 129 | XVECTOR (regs)->contents[1] = make_number (outregs.x.bx); |
| 130 | XVECTOR (regs)->contents[2] = make_number (outregs.x.cx); |
| 131 | XVECTOR (regs)->contents[3] = make_number (outregs.x.dx); |
| 132 | XVECTOR (regs)->contents[4] = make_number (outregs.x.si); |
| 133 | XVECTOR (regs)->contents[5] = make_number (outregs.x.di); |
| 134 | XVECTOR (regs)->contents[6] = make_number (outregs.x.cflag); |
| 135 | XVECTOR (regs)->contents[7] = make_number (outregs.x.flags); |
| 136 | |
| 137 | return regs; |
| 138 | } |
| 139 | |
| 140 | int dos_country_code; |
| 141 | int dos_codepage; |
| 142 | Lisp_Object Vdos_version; |
| 143 | |
| 144 | void |
| 145 | init_dosfns () |
| 146 | { |
| 147 | union REGS regs; |
| 148 | _go32_dpmi_seginfo info; |
| 149 | _go32_dpmi_registers dpmiregs; |
| 150 | |
| 151 | get_lim_data (); /* why the hell isn't this called elsewhere? */ |
| 152 | |
| 153 | regs.x.ax = 0x3000; |
| 154 | intdos (®s, ®s); |
| 155 | Vdos_version = Fcons (make_number (regs.h.al), make_number (regs.h.ah)); |
| 156 | |
| 157 | /* Obtain the country code by calling Dos via Dpmi. Don't rely on GO32. */ |
| 158 | info.size = (34 + 15) / 16; |
| 159 | if (_go32_dpmi_allocate_dos_memory (&info)) |
| 160 | dos_country_code = 1; |
| 161 | else |
| 162 | { |
| 163 | dpmiregs.x.ax = 0x3800; |
| 164 | dpmiregs.x.ds = info.rm_segment; |
| 165 | dpmiregs.x.dx = 0; |
| 166 | dpmiregs.x.ss = dpmiregs.x.sp = 0; |
| 167 | _go32_dpmi_simulate_int (0x21, &dpmiregs); |
| 168 | dos_country_code = dpmiregs.x.bx; |
| 169 | _go32_dpmi_free_dos_memory (&info); |
| 170 | } |
| 171 | |
| 172 | regs.x.ax = 0x6601; |
| 173 | intdos (®s, ®s); |
| 174 | if (regs.x.cflag) |
| 175 | /* Estimate code page from country code */ |
| 176 | switch (dos_country_code) |
| 177 | { |
| 178 | case 45: /* Denmark */ |
| 179 | case 47: /* Norway */ |
| 180 | dos_codepage = 865; |
| 181 | break; |
| 182 | default: |
| 183 | /* US */ |
| 184 | dos_codepage = 437; |
| 185 | } |
| 186 | else |
| 187 | dos_codepage = regs.x.bx & 0xffff; |
| 188 | } |
| 189 | \f |
| 190 | /* |
| 191 | * Define everything |
| 192 | */ |
| 193 | syms_of_dosfns () |
| 194 | { |
| 195 | defsubr (&Smode25); |
| 196 | defsubr (&Smode4350); |
| 197 | defsubr (&Sint86); |
| 198 | |
| 199 | DEFVAR_INT ("dos-country-code", &dos_country_code, |
| 200 | "The country code returned by Dos when Emacs was started.\n\ |
| 201 | Usually this is the international telephone prefix."); |
| 202 | |
| 203 | DEFVAR_INT ("dos-codepage", &dos_codepage, |
| 204 | "The codepage active when Emacs was started.\n\ |
| 205 | The following are known:\n\ |
| 206 | 437 United States\n\ |
| 207 | 850 Multilingual (Latin I)\n\ |
| 208 | 852 Slavic (Latin II)\n\ |
| 209 | 857 Turkish\n\ |
| 210 | 860 Portugal\n\ |
| 211 | 861 Iceland\n\ |
| 212 | 863 Canada (French)\n\ |
| 213 | 865 Norway/Denmark"); |
| 214 | |
| 215 | DEFVAR_LISP ("dos-version", &Vdos_version, |
| 216 | "The (MAJOR . MINOR) Dos version (subject to modification with setver)."); |
| 217 | } |
| 218 | #endif /* MSDOS */ |