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535b692091
doscmd heavily depends on struct sigcontext which luckily is mostly passed
between functions as usion regcontext_t. By redefining union regcontext_t in
terms of mcontext_t almost all bases are covered.
It also seems to me that doscmd was in a transitional state. The redundant
definitions made it difficult to get a clear overview and could easily cause
oversight. To make sure my changes were ok, I went as far as to complete the
transition. It was not exactly necessary, but I expect to have to come back
here some more ("whistle" if I'm wrong :-).
332 lines
9.1 KiB
C
332 lines
9.1 KiB
C
/*
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* Copyright (c) 1992, 1993, 1996
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* Berkeley Software Design, Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Berkeley Software
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* Design, Inc.
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*
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* THIS SOFTWARE IS PROVIDED BY Berkeley Software Design, Inc. ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL Berkeley Software Design, Inc. BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* BSDI bios.c,v 2.3 1996/04/08 19:32:19 bostic Exp
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*
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* $FreeBSD$
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*/
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#include "doscmd.h"
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#include "mouse.h"
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#include "com.h"
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#define BIOS_copyright 0xfe000
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#define BIOS_reset 0xfe05b
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#define BIOS_nmi 0xfe2c3
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#define BIOS_hdisk_table 0xfe401
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#define BIOS_boot 0xfe6f2
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#define BIOS_comm_table 0xfe729
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#define BIOS_comm_io 0xfe739
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#define BIOS_keyboard_io 0xfe82e
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#define BIOS_keyboard_isr 0xfe987
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#define BIOS_fdisk_io 0xfec59
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#define BIOS_fdisk_isr 0xfef57
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#define BIOS_disk_parms 0xfefc7
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#define BIOS_printer_io 0xfefd2
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#define BIOS_video_io 0xff065
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#define BIOS_video_parms 0xff0a4
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#define BIOS_mem_size 0xff841
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#define BIOS_equipment 0xff84d
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#define BIOS_cassette_io 0xff859
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#define BIOS_video_font 0xffa6e
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#define BIOS_time_of_day 0xffe6e
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#define BIOS_timer_int 0xffea5
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#define BIOS_vector 0xffef3
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#define BIOS_dummy_iret 0xfff53
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#define BIOS_print_screen 0xfff54
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#define BIOS_hard_reset 0xffff0
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#define BIOS_date_stamp 0xffff5
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#define BIOS_hardware_id 0xffffe
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static u_char video_parms[] = {
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0x38, 40, 0x2d, 10, 0x1f, 6, 0x19, 0x1c, 2, 7, 6, 7, 0, 0, 0, 0,
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0x71, 80, 0x5a, 10, 0x1f, 6, 0x19, 0x1c, 2, 7, 6, 7, 0, 0, 0, 0,
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0x38, 40, 0x2d, 10, 0x7f, 6, 0x64, 0x70, 2, 1, 6, 7, 0, 0, 0, 0,
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0x61, 80, 0x52, 15, 0x19, 6, 0x19, 0x19, 2, 13, 11, 12, 0, 0, 0, 0,
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};
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static u_char disk_params[] = {
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0xdf, 2, 0x25, 2, 0x0f, 0x1b, 0xff, 0x54, 0xf6, 0x0f, 8,
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};
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static u_short comm_table[] = {
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1047, 768, 384, 192, 96, 48, 24, 12,
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};
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/* exports */
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int nfloppies = 0;
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int ndisks = 0;
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int nserial = 0;
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int nparallel = 0;
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unsigned long rom_config;
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/*
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** BIOS equipment list
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*/
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static void
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int11(regcontext_t *REGS)
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{
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R_AX =
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(nfloppies ? 1:0) | /* do we have any floppydisks? */
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(0x2 << 4) | /* 80x25 colour */
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((nfloppies-1) << 6) | /* how many floppies? */
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(nserial << 9) | /* serial ports? */
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(nparallel << 14); /* parallel ports? */
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}
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/*
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** get installed memory
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*/
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static void
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int12(regcontext_t *REGS)
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{
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R_AX = 640;
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}
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/*
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** assorted oddments
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*/
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static void
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int15(regcontext_t *REGS)
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{
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int cond;
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int count;
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R_FLAGS &= ~PSL_C;
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switch (R_AH) {
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case 0x00: /* Get Cassette Status */
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R_AH = 0x86;
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R_FLAGS |= PSL_C; /* We don't support a cassette */
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break;
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case 0x04: /* Set ABIOS table */
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R_FLAGS |= PSL_C; /* We don't support it */
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break;
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case 0x4f:
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/*
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* XXX - Check scan code in GET8L(sc->sc_eax).
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*/
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break;
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case 0x88:
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get_raw_extmemory_info(REGS);
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break;
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case 0xc0: /* get configuration */
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debug (D_TRAPS|0x15, "Get configuration\n", R_DX);
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PUTVEC(R_ES, R_BX, rom_config);
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R_AH = 0;
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break;
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case 0xc1: /* get extended BIOS data area */
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R_FLAGS |= PSL_C;
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break;
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case 0xc2: /* Pointing device */
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R_FLAGS |= PSL_C;
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R_AH = 5; /* No pointer */
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break;
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default:
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unknown_int2(0x15, R_AX, REGS);
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break;
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}
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}
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extern void int16(regcontext_t *REGS);
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extern void int17(regcontext_t *REGS);
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extern void int1a(regcontext_t *REGS);
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void
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bios_init(void)
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{
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int i, j, k;
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u_char *jtab;
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struct timeval tv;
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time_t tv_sec;
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struct timezone tz;
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struct tm tm;
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u_long vec;
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if (1 || !raw_kbd) {
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strcpy((char *)BIOS_copyright,
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"Copyright (C) 1993 Krystal Technologies/BSDI");
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*(u_short *)BIOS_reset = 0xffcd;
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*(u_short *)BIOS_nmi = 0xffcd;
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*(u_short *)BIOS_boot = 0xffcd;
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*(u_short *)BIOS_comm_io = 0xffcd;
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*(u_short *)BIOS_keyboard_io = 0xffcd;
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*(u_short *)BIOS_keyboard_isr = 0xffcd;
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*(u_short *)BIOS_fdisk_io = 0xffcd;
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*(u_short *)BIOS_fdisk_isr = 0xffcd;
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*(u_short *)BIOS_printer_io = 0xffcd;
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*(u_short *)BIOS_video_io = 0xffcd;
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*(u_short *)BIOS_cassette_io = 0xffcd;
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*(u_short *)BIOS_time_of_day = 0xffcd;
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*(u_short *)BIOS_timer_int = 0xffcd;
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*(u_short *)BIOS_dummy_iret = 0xffcd;
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*(u_short *)BIOS_print_screen = 0xffcd;
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*(u_short *)BIOS_hard_reset = 0xffcd;
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*(u_short *)BIOS_mem_size = 0xffcd;
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*(u_short *)BIOS_equipment = 0xffcd;
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*(u_short *)BIOS_vector = 0xffcd;
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*(u_char *)0xffff2 = 0xcf; /* IRET */
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/*
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*memcpy((u_char *)BIOS_video_parms, video_parms, sizeof(video_parms));
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*/
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memcpy((u_char *)BIOS_disk_parms, disk_params, sizeof(disk_params));
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memcpy((u_char *)BIOS_comm_table, comm_table, sizeof(comm_table));
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*(u_short *)BIOS_video_font = 0xffcd;
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jtab = (u_char *)BIOS_date_stamp;
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*jtab++ = '1';
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*jtab++ = '0';
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*jtab++ = '/';
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*jtab++ = '3';
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*jtab++ = '1';
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*jtab++ = '/';
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*jtab++ = '9';
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*jtab++ = '3';
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#if 0
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*(u_char *)BIOS_hardware_id = 0xfe; /* Identify as a PC/XT */
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*(u_char *)BIOS_hardware_id = 0xff; /* Identify as a PC */
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#endif
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*(u_char *)BIOS_hardware_id = 0xfc; /* Identify as a PC/AT */
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}
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/*
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* Interrupt revectors F000:0000 - F000:03ff
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*/
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for (i = 0, j = 0, k = 0; i < 0x100; ++i) {
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if ((i >= 0x60 && i < 0x68) ||
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(i >= 0x78 && i < 0xe2))
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continue;
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if ((i >= 0x00 && i < 0x2f) ||
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(i >= 0x30 && i < 0xfe)) {
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ivec[i] = 0xF0300000L | (k * 1);
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jtab = (u_char *)VECPTR(ivec[i]);
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*jtab++ = 0xf4; /* HLT */
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++k;
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} else {
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ivec[i] = 0xF0000000L | (j * 6);
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jtab = (u_char *)VECPTR(ivec[i]);
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*jtab++ = 0xcd; /* INT i */
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*jtab++ = i;
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*jtab++ = 0xca; /* RETF 2 */
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*jtab++ = 2;
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*jtab++ = 0;
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++j;
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}
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}
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/*
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* Misc variables from F000:0400 - F000:0fff
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*/
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rom_config = 0xF0000400;
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jtab = (u_char *)VECPTR(rom_config);
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*jtab++ = 20; /* length of entry */
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*jtab++ = 0;
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*jtab++ = *(u_char *)BIOS_hardware_id;
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*jtab++ = 0x00; /* Sub model */
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*jtab++ = 0x01; /* Bios Rev Enhanced kbd w/3.5" floppy */
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*jtab++ = 0x20; /* real time clock present */
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*jtab++ = 0; /* Reserved */
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*jtab++ = 0;
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*jtab++ = 0;
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*jtab++ = 0;
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strcpy((char *)jtab, "BSDI BIOS");
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*jtab += 10;
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InDOS = jtab++;
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*InDOS = 0;
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mouse_area = jtab;
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jtab += 0x10;
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*(u_short *)&BIOSDATA[0x10] =
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(1 << 0) | /* Diskette avail for boot */
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(1 << 1) | /* Math co-processor */
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(nmice << 2) | /* No pointing device */
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(2 << 4) | /* Initial video (80 x 25 C) */
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(nfloppies - 1 << 6) | /* Number of floppies - 1 */
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(nserial << 9) | /* Number of serial devices */
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(nparallel << 14); /* Number of parallel devices */
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*(u_short *)&BIOSDATA[0x13] = 640; /* Amount of memory */
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BIOSDATA[0x75] = ndisks; /* number of fixed disks */
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BIOSDATA[0x8F] = 0;
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if (nfloppies >= 1) {
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BIOSDATA[0x8F] |= 0x04;
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BIOSDATA[0x90] = 0x40;
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}
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if (nfloppies >= 2) {
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BIOSDATA[0x8F] |= 0x40;
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BIOSDATA[0x91] = 0x40;
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}
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gettimeofday(&tv, &tz);
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tv_sec = tv.tv_sec;
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tm = *localtime(&tv_sec);
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*(u_long *)&BIOSDATA[0x6c] =
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(((tm.tm_hour * 60 + tm.tm_min) * 60) + tm.tm_sec) * 182 / 10;
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vec = insert_softint_trampoline();
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ivec[0x11] = vec;
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register_callback(vec, int11, "int 11");
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vec = insert_softint_trampoline();
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ivec[0x12] = vec;
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register_callback(vec, int12, "int 12");
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vec = insert_softint_trampoline();
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ivec[0x14] = vec;
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register_callback(vec, int14, "int 14");
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vec = insert_softint_trampoline();
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ivec[0x15] = vec;
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register_callback(vec, int15, "int 15");
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vec = insert_softint_trampoline();
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ivec[0x16] = vec;
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register_callback(vec, int16, "int 16");
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vec = insert_softint_trampoline();
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ivec[0x17] = vec;
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register_callback(vec, int17, "int 17");
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vec = insert_softint_trampoline();
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ivec[0x1a] = vec;
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register_callback(vec, int1a, "int 1a");
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}
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