| Current Path : /sys/amd64/compile/hs32/modules/usr/src/sys/modules/snp/@/boot/pc98/boot0.5/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
| Current File : //sys/amd64/compile/hs32/modules/usr/src/sys/modules/snp/@/boot/pc98/boot0.5/support.s |
# Copyright (c) KATO Takenori, 1999, 2000. # # All rights reserved. Unpublished rights reserved under the copyright # laws of Japan. # # Redistribution and use in source and binary forms, with or without # modification, are permitted provided that the following conditions # are met: # # 1. Redistributions of source code must retain the above copyright # notice, this list of conditions and the following disclaimer as # the first lines of this file unmodified. # 2. Redistributions in binary form must reproduce the above copyright # notice, this list of conditions and the following disclaimer in the # documentation and/or other materials provided with the distribution. # # THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES # OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. # IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT # NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. # # $FreeBSD: release/9.1.0/sys/boot/pc98/boot0.5/support.s 64123 2000-08-02 08:46:08Z kato $ # .code16 .text # # Wait 1ms # .global wait1ms wait1ms: push %cx movw $800, %cx wait_loop: outb %al, $0x5f loop wait_loop pop %cx ret # # Read one byte from BIOS parameter block # %bx offset # %dl value # .global read_biosparam read_biosparam: movb %es:(%bx), %dl ret # # Write one byte to BIOS paramter block # %bx offset # %dl value # .global write_biosparam write_biosparam: movb %dl, %es:(%bx) ret # # beep # .global beep_on, beep_off, beep beep_on: movb $0x17, %ah int $0x18 ret beep_off: movb $0x18, %ah int $0x18 ret beep: push %cx call beep_on movw $100, %cx beep_loop1: call wait1ms loop beep_loop1 call beep_off movw $50, %cx beep_loop2: call wait1ms loop beep_loop2 pop %cx ret