message.S revision 1.1
1 1.1 dsl /* $NetBSD: message.S,v 1.1 2003/04/16 13:24:09 dsl Exp $ */ 2 1.1 dsl 3 1.1 dsl /*- 4 1.1 dsl * Copyright (c) 2003 The NetBSD Foundation, Inc. 5 1.1 dsl * All rights reserved. 6 1.1 dsl * 7 1.1 dsl * This code is derived from software contributed to The NetBSD Foundation 8 1.1 dsl * by David Laight. 9 1.1 dsl * 10 1.1 dsl * Redistribution and use in source and binary forms, with or without 11 1.1 dsl * modification, are permitted provided that the following conditions 12 1.1 dsl * are met: 13 1.1 dsl * 1. Redistributions of source code must retain the above copyright 14 1.1 dsl * notice, this list of conditions and the following disclaimer. 15 1.1 dsl * 2. Redistributions in binary form must reproduce the above copyright 16 1.1 dsl * notice, this list of conditions and the following disclaimer in the 17 1.1 dsl * documentation and/or other materials provided with the distribution. 18 1.1 dsl * 3. All advertising materials mentioning features or use of this software 19 1.1 dsl * must display the following acknowledgement: 20 1.1 dsl * This product includes software developed by the NetBSD 21 1.1 dsl * Foundation, Inc. and its contributors. 22 1.1 dsl * 4. Neither the name of The NetBSD Foundation nor the names of its 23 1.1 dsl * contributors may be used to endorse or promote products derived 24 1.1 dsl * from this software without specific prior written permission. 25 1.1 dsl * 26 1.1 dsl * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 1.1 dsl * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 1.1 dsl * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 1.1 dsl * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 1.1 dsl * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 1.1 dsl * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 1.1 dsl * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 1.1 dsl * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 1.1 dsl * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 1.1 dsl * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 1.1 dsl * POSSIBILITY OF SUCH DAMAGE. 37 1.1 dsl */ 38 1.1 dsl 39 1.1 dsl #include <machine/asm.h> 40 1.1 dsl 41 1.1 dsl /* 42 1.1 dsl * message: write the error message in %ds:%esi to the console 43 1.1 dsl */ 44 1.1 dsl ENTRY(message) 45 1.1 dsl /* 46 1.1 dsl * BIOS call "INT 10H Function 0Eh" to write character to console 47 1.1 dsl * Call with %ah = 0x0e 48 1.1 dsl * %al = character 49 1.1 dsl * %bh = page 50 1.1 dsl * %bl = foreground color 51 1.1 dsl */ 52 1.1 dsl .code16 53 1.1 dsl pusha 54 1.1 dsl ENTRY(message_1) /* for dump_eax */ 55 1.1 dsl 1: 56 1.1 dsl cld 57 1.1 dsl lodsb 58 1.1 dsl testb %al, %al 59 1.1 dsl jz 2f 60 1.1 dsl 61 1.1 dsl movb $0x0e, %ah 62 1.1 dsl movw $0x0001, %bx 63 1.1 dsl int $0x10 64 1.1 dsl 65 1.1 dsl jmp 1b 66 1.1 dsl 67 1.1 dsl 2: 68 1.1 dsl #ifdef MESSAGE_PAUSE 69 1.1 dsl /* Delay for about 1 second to allow message to be read */ 70 1.1 dsl movb $0x86, %ah 71 1.1 dsl mov $16, %cx /* about a second */ 72 1.1 dsl int $0x15 /* delay cx:dx usecs */ 73 1.1 dsl #endif 74 1.1 dsl popa 75 1.1 dsl ret 76
Indexes created Fri Sep 26 20:09:58 GMT 2025