usr.bin/doscmd/bios.c

   1 /*
   2  * Copyright (c) 1992, 1993, 1996
   3  *      Berkeley Software Design, Inc.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by Berkeley Software
  16  *      Design, Inc.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY Berkeley Software Design, Inc. ``AS IS'' AND
  19  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  21  * ARE DISCLAIMED.  IN NO EVENT SHALL Berkeley Software Design, Inc. BE LIABLE
  22  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  23  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  24  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  26  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  27  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  28  * SUCH DAMAGE.
  29  *
  30  *      BSDI bios.c,v 2.3 1996/04/08 19:32:19 bostic Exp
  31  *
  32  * $FreeBSD: src/usr.bin/doscmd/bios.c,v 1.5.2.1 2002/04/25 11:04:50 tg Exp $
  33  * $DragonFly: src/usr.bin/doscmd/bios.c,v 1.2 2003/06/17 04:29:25 dillon Exp $
  34  */
  35
  36 #include "doscmd.h"
  37 #include "mouse.h"
  38 #include "com.h"
  39
  40 #define BIOS_copyright         0xfe000
  41 #define BIOS_reset             0xfe05b
  42 #define BIOS_nmi               0xfe2c3
  43 #define BIOS_hdisk_table       0xfe401
  44 #define BIOS_boot              0xfe6f2
  45 #define BIOS_comm_table        0xfe729
  46 #define BIOS_comm_io           0xfe739
  47 #define BIOS_keyboard_io       0xfe82e
  48 #define BIOS_keyboard_isr      0xfe987
  49 #define BIOS_fdisk_io          0xfec59
  50 #define BIOS_fdisk_isr         0xfef57
  51 #define BIOS_disk_parms        0xfefc7
  52 #define BIOS_printer_io        0xfefd2
  53 #define BIOS_video_io          0xff065
  54 #define BIOS_video_parms       0xff0a4
  55 #define BIOS_mem_size          0xff841
  56 #define BIOS_equipment         0xff84d
  57 #define BIOS_cassette_io       0xff859
  58 #define BIOS_video_font        0xffa6e
  59 #define BIOS_time_of_day       0xffe6e
  60 #define BIOS_timer_int         0xffea5
  61 #define BIOS_vector            0xffef3
  62 #define BIOS_dummy_iret        0xfff53
  63 #define BIOS_print_screen      0xfff54
  64 #define BIOS_hard_reset        0xffff0
  65 #define BIOS_date_stamp        0xffff5
  66 #define BIOS_hardware_id       0xffffe
  67
  68 static u_char disk_params[] = {
  69     0xdf, 2, 0x25, 2, 0x0f, 0x1b, 0xff, 0x54, 0xf6, 0x0f, 8,
  70 };
  71
  72 static u_short comm_table[] = {
  73     1047, 768, 384, 192, 96, 48, 24, 12,
  74 };
  75
  76 /* exports */
  77
  78 int              nfloppies = 0;
  79 int              ndisks = 0;
  80 int              nserial = 0;
  81 int              nparallel = 0;
  82 unsigned long   rom_config;
  83
  84 /*
  85 ** BIOS equipment list
  86 */
  87 static void
  88 int11(regcontext_t *REGS)
  89 {
  90     R_AX =
  91         (nfloppies ? 1:0) |     /* do we have any floppydisks? */
  92         (0x2 << 4) |            /* 80x25 colour */
  93         ((nfloppies-1) << 6) |  /* how many floppies? */
  94         (nserial << 9) |        /* serial ports? */
  95         (nparallel << 14);      /* parallel ports? */
  96 }
  97
  98 /*
  99 ** get installed memory
 100 */
 101 static void
 102 int12(regcontext_t *REGS)
 103 {
 104     R_AX = 640;
 105 }
 106
 107 /*
 108 ** assorted oddments
 109 */
 110 static void
 111 int15(regcontext_t *REGS)
 112 {
 113     R_FLAGS &= ~PSL_C;
 114
 115     switch (R_AH) {
 116     case 0x00:                  /* Get Cassette Status */
 117         R_AH = 0x86;
 118         R_FLAGS |= PSL_C;       /* We don't support a cassette */
 119         break;
 120     case 0x04:                  /* Set ABIOS table */
 121         R_FLAGS |= PSL_C;       /* We don't support it */
 122         break;
 123     case 0x4f:                  /* Keyboard intercept */
 124         debug(D_TRAPS | 0x15, "BIOS: Keyboard intercept\n");
 125         /* Don't translate scan code. */
 126         break;
 127     case 0x88:
 128         get_raw_extmemory_info(REGS);
 129         break;
 130     case 0xc0:                  /* Get configuration */
 131         debug(D_TRAPS | 0x15, "BIOS: Get configuration\n");
 132         PUTVEC(R_ES, R_BX, rom_config);
 133         R_AH = 0;
 134         break;
 135     case 0xc1:                  /* Get extended BIOS data area */
 136         R_FLAGS |= PSL_C;
 137         break;
 138     case 0xc2:                  /* Pointing device */
 139         debug(D_TRAPS | 0x15, "BIOS: Pointing device?\n");
 140         R_FLAGS |= PSL_C;
 141         R_AH = 5;       /* No pointer */
 142         break;
 143     default:
 144         unknown_int2(0x15, R_AX, REGS);
 145         break;
 146     }
 147 }
 148
 149 void
 150 bios_init(void)
 151 {
 152     int i, j, k;
 153     u_char *jtab;
 154     struct timeval tv;
 155     time_t tv_sec;
 156     struct timezone tz;
 157     struct tm tm;
 158     u_long vec;
 159
 160     strcpy((char *)BIOS_copyright,
 161            "Copyright (C) 1993 Krystal Technologies/BSDI");
 162
 163     *(u_short *)BIOS_reset = 0xffcd;
 164     *(u_short *)BIOS_nmi = 0xffcd;
 165     *(u_short *)BIOS_boot = 0xffcd;
 166     *(u_short *)BIOS_comm_io = 0xffcd;
 167     *(u_short *)BIOS_keyboard_io = 0xffcd;
 168     *(u_short *)BIOS_keyboard_isr = 0xffcd;
 169     *(u_short *)BIOS_fdisk_io = 0xffcd;
 170     *(u_short *)BIOS_fdisk_isr = 0xffcd;
 171     *(u_short *)BIOS_printer_io = 0xffcd;
 172     *(u_short *)BIOS_video_io = 0xffcd;
 173     *(u_short *)BIOS_cassette_io = 0xffcd;
 174     *(u_short *)BIOS_time_of_day = 0xffcd;
 175     *(u_short *)BIOS_timer_int = 0xffcd;
 176     *(u_short *)BIOS_dummy_iret = 0xffcd;
 177     *(u_short *)BIOS_print_screen = 0xffcd;
 178     *(u_short *)BIOS_hard_reset = 0xffcd;
 179     *(u_short *)BIOS_mem_size = 0xffcd;
 180     *(u_short *)BIOS_equipment = 0xffcd;
 181     *(u_short *)BIOS_vector = 0xffcd;
 182     *(u_char *)0xffff2 = 0xcf;                  /* IRET */
 183
 184     memcpy((u_char *)BIOS_disk_parms, disk_params, sizeof(disk_params));
 185     memcpy((u_char *)BIOS_comm_table, comm_table, sizeof(comm_table));
 186
 187     *(u_short *)BIOS_video_font = 0xffcd;
 188
 189     jtab = (u_char *)BIOS_date_stamp;
 190     *jtab++ = '1';
 191     *jtab++ = '0';
 192     *jtab++ = '/';
 193     *jtab++ = '3';
 194     *jtab++ = '1';
 195     *jtab++ = '/';
 196     *jtab++ = '9';
 197     *jtab++ = '3';
 198
 199     *(u_char *)BIOS_hardware_id = 0xfc;           /* Identify as a PC/AT */
 200
 201     /*
 202      * Interrupt revectors F000:0000 - F000:03ff
 203      */
 204     for (i = 0, j = 0, k = 0; i < 0x100; ++i) {
 205         if ((i >= 0x60 && i < 0x68) ||
 206             (i >= 0x78 && i < 0xe2))
 207             continue;
 208         if ((i >= 0x00 && i < 0x2f) ||
 209             (i >= 0x30 && i < 0xfe)) {
 210             ivec[i] = 0xF0300000L | (k * 1);
 211             jtab = (u_char *)VECPTR(ivec[i]);
 212             *jtab++ = 0xf4;     /* HLT */
 213             ++k;
 214         } else {
 215             ivec[i] = 0xF0000000L | (j * 6);
 216             jtab = (u_char *)VECPTR(ivec[i]);
 217             *jtab++ = 0xcd;     /* INT i */
 218             *jtab++ = i;
 219             *jtab++ = 0xca;     /* RETF 2 */
 220             *jtab++ = 2;
 221             *jtab++ = 0;
 222             ++j;
 223         }
 224     }
 225
 226     /*
 227      * Misc variables from F000:0400 - F000:0fff
 228      */
 229     rom_config = 0xF0000400;
 230     jtab = (u_char *)VECPTR(rom_config);
 231     *jtab++ = 20;           /* length of entry */
 232     *jtab++ = 0;
 233     *jtab++ = *(u_char *)BIOS_hardware_id;
 234     *jtab++ = 0x00;         /* Sub model */
 235     *jtab++ = 0x01;         /* Bios Rev Enhanced kbd w/3.5" floppy */
 236     *jtab++ = 0x20;         /* real time clock present */
 237     *jtab++ = 0;            /* Reserved */
 238     *jtab++ = 0;
 239     *jtab++ = 0;
 240     *jtab++ = 0;
 241     strcpy((char *)jtab, "BSDI BIOS");
 242     *jtab += 10;
 243
 244     InDOS = jtab++;
 245     *InDOS = 0;
 246
 247     mouse_area = jtab;
 248     jtab += 0x10;
 249
 250     *(u_short *)&BIOSDATA[0x10] =
 251         (1 << 0) |              /* Diskette avail for boot */
 252         (1 << 1) |              /* Math co-processor */
 253         (nmice << 2) |          /* No pointing device */
 254         (2 << 4) |              /* Initial video (80 x 25 C) */
 255         ((nfloppies - 1) << 6) |        /* Number of floppies - 1 */
 256         (nserial << 9) |        /* Number of serial devices */
 257         (nparallel << 14);      /* Number of parallel devices */
 258
 259
 260     *(u_short *)&BIOSDATA[0x13] = 640;  /* Amount of memory */
 261     BIOSDATA[0x75] = ndisks;            /* number of fixed disks */
 262
 263     BIOSDATA[0x8F] = 0;
 264     if (nfloppies >= 1) {
 265         BIOSDATA[0x8F] |= 0x04;
 266         BIOSDATA[0x90] = 0x40;
 267     }
 268     if (nfloppies >= 2) {
 269         BIOSDATA[0x8F] |= 0x40;
 270         BIOSDATA[0x91] = 0x40;
 271     }
 272
 273     gettimeofday(&tv, &tz);
 274     tv_sec = tv.tv_sec;
 275     tm = *localtime(&tv_sec);
 276     *(u_long *)&BIOSDATA[0x6c] =
 277         (((tm.tm_hour * 60 + tm.tm_min) * 60) + tm.tm_sec) * 182 / 10;
 278
 279     vec = insert_softint_trampoline();
 280     ivec[0x11] = vec;
 281     register_callback(vec, int11, "int 11");
 282
 283     vec = insert_softint_trampoline();
 284     ivec[0x12] = vec;
 285     register_callback(vec, int12, "int 12");
 286
 287     vec = insert_softint_trampoline();
 288     ivec[0x14] = vec;
 289     register_callback(vec, int14, "int 14");
 290
 291     vec = insert_softint_trampoline();
 292     ivec[0x15] = vec;
 293     register_callback(vec, int15, "int 15");
 294
 295     vec = insert_softint_trampoline();
 296     ivec[0x16] = vec;
 297     register_callback(vec, int16, "int 16");
 298
 299     vec = insert_softint_trampoline();
 300     ivec[0x17] = vec;
 301     register_callback(vec, int17, "int 17");
 302
 303     vec = insert_softint_trampoline();
 304     ivec[0x1a] = vec;
 305     register_callback(vec, int1a, "int 1a");
 306 }