1/* $NetBSD: message.S,v 1.3 2008/04/28 20:23:25 martin Exp $ */ 2 3/*- 4 * Copyright (c) 2003 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by David Laight. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32#include <machine/asm.h> 33 34 .global message, message_1 35 36/* 37 * message: write the error message in %ds:%esi to the console 38 */ 39message: 40/* 41 * BIOS call "INT 10H Function 0Eh" to write character to console 42 * Call with %ah = 0x0e 43 * %al = character 44 * %bh = page 45 * %bl = foreground color 46 */ 47 .code16 48 pusha 49message_1: /* for dump_eax */ 50 lodsb 511: 52 movb $0x0e, %ah 53 movw $0x0001, %bx 54 int $0x10 55 lodsb 56 testb %al, %al 57 jnz 1b 58 59#ifdef MESSAGE_PAUSE 60 /* Delay for about 1 second to allow message to be read */ 61 movb $0x86, %ah 62 mov $16, %cx /* about a second */ 63 int $0x15 /* delay cx:dx usecs */ 64#endif 65 popa 66 ret 67