| 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/syscons.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 Unpublished rights reserved under the copyright # laws of Japan.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/syscons.s 64123 2000-08-02 08:46:08Z kato $ # .code16 .text # # %al character code # destroyed: %al, %bx # put_character: movw $0xe000, %bx movb ishireso, %ah orb %ah, %ah jne hireso_ch movw $0xa000, %bx hireso_ch: movw %bx, %es xorb %ah, %ah movw curpos, %bx movw %ax, %es:(%bx) xorw %ax, %ax movw %ax, %es ret # # %al attribute # destroyed: %ah, %cx # set_attribute: movw $0xe200, %bx movb ishireso, %ah orb %ah, %ah jne hireso_ch movw $0xa200, %bx hireso_attr: movw %bx, %es xorb %ah, %ah movw curpos, %bx movw %ax, %es:(%bx) xorw %bx, %bx movw %bx, %es ret # # Put a character # %al: character code # destroyed: %ah, %bx, %cx # .global sc_putc sc_putc: call put_character incw curpos incw curpos cmpw $4000, curpos jng putc_end movw $0, curpos putc_end: ret # # Put a null terminated string # %di: pointer to string # destroyed: %ah, %cx, %di # .global sc_puts sc_puts: movb (%di), %al orb %al, %al jz puts_end call sc_putc incw %di jmp sc_puts puts_end: ret # # Change the current cursor position # %cx: X # %dx: Y # destroyed: %ax, %bx # .global sc_goto sc_goto: movw %dx, %ax # AX=Y shlw %ax # AX=Y*64 shlw %ax shlw %ax shlw %ax shlw %ax shlw %ax movw %dx, %bx # BX=Y shlw %bx # BX=Y*16 shlw %bx shlw %bx shlw %bx addw %bx, %ax # AX=Y*64+Y*16=Y*80 addw %cx, %ax shlw %ax movw %ax, curpos ret # # Clear screen # destroyed: %ax, %bx # .global sc_clean sc_clean: movb $0x16, %ah movw $0xe120, %dx int $0x18 # KBD/CRT BIOS movw $0, curpos ret # # Set sttribute code # %al: attribute # %cx: count # destroyed: %ax, %bx, %cx # .global sc_setattr sc_setattr: call set_attribute incw curpos incw curpos loop sc_setattr # # Sense the state of shift key # destroyed: %ax # .global sc_getshiftkey sc_getshiftkey: movb $2, %ah # Sense KB_SHIFT_COD int $0x18 # KBD/CRT BIOS xorb %ah, %ah ret # # Check KBD buffer # .global sc_iskeypress sc_iskeypress: mov $1, %ah int $0x18 # KBD/CRT BIOS testb $1, %bh jz no_key movw $1, %ax ret no_key: xorw %ax, %ax ret # # Read from KBD # .global sc_getc sc_getc: xorb %ah, %ah int $0x18 ret # # Initialize CRT (normal mode) # init_screen_normal: # Disable graphic screen movb $0x41, %ah int $0x18 # Init graphic screen movb $0x42, %al movb $0xc0, %ch int $0x18 # 80x25 mode movw $0x0a00, %ax int $0x18 ret # # Initialize CRT (hireso mode) # init_screen_hireso: # Init RAM window movb $8, %al outb %al, $0x91 movb $0x0a, %al outb %al, $0x93 # 80x31 mode movw $0x0a00, %ax int $0x18 ret # # Initialize screen (internal) # init_screen: movb ishireso, %ah orb %ah, %ah jne hireso_ini call init_screen_normal jmp init_next hireso_ini: call init_screen_hireso init_next: movb $0x0c, %ah int $0x18 # cursor home and off xorw %dx, %dx movb $0x13, %ah int $0x18 movb $0x12, %ah int $0x18 ret # # Initialize screeen # .global sc_init sc_init: call init_screen call sc_clean movw $0, curpos ret .data curpos: .word 0 # Current cursor position