[PATCH] x86-64: Share identical video.S between i386 and x86-64

Signed-off-by: Andi Kleen <ak@suse.de>

2 files changed, 1 insertions, 2044 deletions

diff --git a/arch/x86_64/boot/setup.S b/arch/x86_64/boot/setup.S
index 4f8851000d7e..e9e33f949697 100644
--- a/arch/x86_64/boot/setup.S
+++ b/arch/x86_64/boot/setup.S
@@ -807,7 +807,7 @@ gdt_48:
 
 # Include video setup & detection code
 
-#include "video.S"
+#include "../../i386/boot/video.S"
 
 # Setup signature -- must be last
 setup_sig1:	.word	SIG1
diff --git a/arch/x86_64/boot/video.S b/arch/x86_64/boot/video.S
deleted file mode 100644
index 8143c9516cb4..000000000000
--- a/arch/x86_64/boot/video.S
+++ /dev/null
@@ -1,2043 +0,0 @@
-/*	video.S
- *
- *	Display adapter & video mode setup, version 2.13 (14-May-99)
- *
- *	Copyright (C) 1995 -- 1998 Martin Mares <mj@ucw.cz>
- *	Based on the original setup.S code (C) Linus Torvalds and Mats Anderson
- *
- *	Rewritten to use GNU 'as' by Chris Noe <stiker@northlink.com> May 1999
- *
- *	For further information, look at Documentation/svga.txt.
- *
- */
-
-/* Enable autodetection of SVGA adapters and modes. */
-#undef CONFIG_VIDEO_SVGA
-
-/* Enable autodetection of VESA modes */
-#define CONFIG_VIDEO_VESA
-
-/* Enable compacting of mode table */
-#define CONFIG_VIDEO_COMPACT
-
-/* Retain screen contents when switching modes */
-#define CONFIG_VIDEO_RETAIN
-
-/* Enable local mode list */
-#undef CONFIG_VIDEO_LOCAL
-
-/* Force 400 scan lines for standard modes (hack to fix bad BIOS behaviour */
-#undef CONFIG_VIDEO_400_HACK
-
-/* Hack that lets you force specific BIOS mode ID and specific dimensions */
-#undef CONFIG_VIDEO_GFX_HACK
-#define VIDEO_GFX_BIOS_AX 0x4f02	/* 800x600 on ThinkPad */
-#define VIDEO_GFX_BIOS_BX 0x0102
-#define VIDEO_GFX_DUMMY_RESOLUTION 0x6425	/* 100x37 */
-
-/* This code uses an extended set of video mode numbers. These include:
- * Aliases for standard modes
- *	NORMAL_VGA (-1)
- *	EXTENDED_VGA (-2)
- *	ASK_VGA (-3)
- * Video modes numbered by menu position -- NOT RECOMMENDED because of lack
- * of compatibility when extending the table. These are between 0x00 and 0xff.
- */
-#define VIDEO_FIRST_MENU 0x0000
-
-/* Standard BIOS video modes (BIOS number + 0x0100) */
-#define VIDEO_FIRST_BIOS 0x0100
-
-/* VESA BIOS video modes (VESA number + 0x0200) */
-#define VIDEO_FIRST_VESA 0x0200
-
-/* Video7 special modes (BIOS number + 0x0900) */
-#define VIDEO_FIRST_V7 0x0900
-
-/* Special video modes */
-#define VIDEO_FIRST_SPECIAL 0x0f00
-#define VIDEO_80x25 0x0f00
-#define VIDEO_8POINT 0x0f01
-#define VIDEO_80x43 0x0f02
-#define VIDEO_80x28 0x0f03
-#define VIDEO_CURRENT_MODE 0x0f04
-#define VIDEO_80x30 0x0f05
-#define VIDEO_80x34 0x0f06
-#define VIDEO_80x60 0x0f07
-#define VIDEO_GFX_HACK 0x0f08
-#define VIDEO_LAST_SPECIAL 0x0f09
-
-/* Video modes given by resolution */
-#define VIDEO_FIRST_RESOLUTION 0x1000
-
-/* The "recalculate timings" flag */
-#define VIDEO_RECALC 0x8000
-
-/* Positions of various video parameters passed to the kernel */
-/* (see also include/linux/tty.h) */
-#define PARAM_CURSOR_POS	0x00
-#define PARAM_VIDEO_PAGE	0x04
-#define PARAM_VIDEO_MODE	0x06
-#define PARAM_VIDEO_COLS	0x07
-#define PARAM_VIDEO_EGA_BX	0x0a
-#define PARAM_VIDEO_LINES	0x0e
-#define PARAM_HAVE_VGA		0x0f
-#define PARAM_FONT_POINTS	0x10
-
-#define PARAM_LFB_WIDTH		0x12
-#define PARAM_LFB_HEIGHT	0x14
-#define PARAM_LFB_DEPTH		0x16
-#define PARAM_LFB_BASE		0x18
-#define PARAM_LFB_SIZE		0x1c
-#define PARAM_LFB_LINELENGTH	0x24
-#define PARAM_LFB_COLORS	0x26
-#define PARAM_VESAPM_SEG	0x2e
-#define PARAM_VESAPM_OFF	0x30
-#define PARAM_LFB_PAGES		0x32
-#define PARAM_VESA_ATTRIB	0x34
-#define PARAM_CAPABILITIES	0x36
-
-/* Define DO_STORE according to CONFIG_VIDEO_RETAIN */
-#ifdef CONFIG_VIDEO_RETAIN
-#define DO_STORE call store_screen
-#else
-#define DO_STORE
-#endif /* CONFIG_VIDEO_RETAIN */
-
-# This is the main entry point called by setup.S
-# %ds *must* be pointing to the bootsector
-video:	pushw	%ds		# We use different segments
-	pushw	%ds		# FS contains original DS
-	popw	%fs
-	pushw	%cs		# DS is equal to CS
-	popw	%ds
-	pushw	%cs		# ES is equal to CS
-	popw	%es
-	xorw	%ax, %ax
-	movw	%ax, %gs	# GS is zero
-	cld
-	call	basic_detect	# Basic adapter type testing (EGA/VGA/MDA/CGA)
-#ifdef CONFIG_VIDEO_SELECT
-	movw	%fs:(0x01fa), %ax		# User selected video mode
-	cmpw	$ASK_VGA, %ax			# Bring up the menu
-	jz	vid2
-
-	call	mode_set			# Set the mode
-	jc	vid1
-
-	leaw	badmdt, %si			# Invalid mode ID
-	call	prtstr
-vid2:	call	mode_menu
-vid1:
-#ifdef CONFIG_VIDEO_RETAIN
-	call	restore_screen			# Restore screen contents
-#endif /* CONFIG_VIDEO_RETAIN */
-	call	store_edid
-#endif /* CONFIG_VIDEO_SELECT */
-	call	mode_params			# Store mode parameters
-	popw	%ds				# Restore original DS
-	ret
-
-# Detect if we have CGA, MDA, EGA or VGA and pass it to the kernel.
-basic_detect:
-	movb	$0, %fs:(PARAM_HAVE_VGA)
-	movb	$0x12, %ah	# Check EGA/VGA
-	movb	$0x10, %bl
-	int	$0x10
-	movw	%bx, %fs:(PARAM_VIDEO_EGA_BX)	# Identifies EGA to the kernel
-	cmpb	$0x10, %bl			# No, it's a CGA/MDA/HGA card.
-	je	basret
-
-	incb	adapter
-	movw	$0x1a00, %ax			# Check EGA or VGA?
-	int	$0x10
-	cmpb	$0x1a, %al			# 1a means VGA...
-	jne	basret				# anything else is EGA.
-	
-	incb	%fs:(PARAM_HAVE_VGA)		# We've detected a VGA
-	incb	adapter
-basret:	ret
-
-# Store the video mode parameters for later usage by the kernel.
-# This is done by asking the BIOS except for the rows/columns
-# parameters in the default 80x25 mode -- these are set directly,
-# because some very obscure BIOSes supply insane values.
-mode_params:
-#ifdef CONFIG_VIDEO_SELECT
-	cmpb	$0, graphic_mode
-	jnz	mopar_gr
-#endif
-	movb	$0x03, %ah			# Read cursor position
-	xorb	%bh, %bh
-	int	$0x10
-	movw	%dx, %fs:(PARAM_CURSOR_POS)
-	movb	$0x0f, %ah			# Read page/mode/width
-	int	$0x10
-	movw	%bx, %fs:(PARAM_VIDEO_PAGE)
-	movw	%ax, %fs:(PARAM_VIDEO_MODE)	# Video mode and screen width
-	cmpb	$0x7, %al			# MDA/HGA => segment differs
-	jnz	mopar0
-
-	movw	$0xb000, video_segment
-mopar0: movw	%gs:(0x485), %ax		# Font size
-	movw	%ax, %fs:(PARAM_FONT_POINTS)	# (valid only on EGA/VGA)
-	movw	force_size, %ax			# Forced size?
-	orw	%ax, %ax
-	jz	mopar1
-
-	movb	%ah, %fs:(PARAM_VIDEO_COLS)
-	movb	%al, %fs:(PARAM_VIDEO_LINES)
-	ret
-
-mopar1:	movb	$25, %al
-	cmpb	$0, adapter			# If we are on CGA/MDA/HGA, the
-	jz	mopar2				# screen must have 25 lines.
-
-	movb	%gs:(0x484), %al		# On EGA/VGA, use the EGA+ BIOS
-	incb	%al				# location of max lines.
-mopar2: movb	%al, %fs:(PARAM_VIDEO_LINES)
-	ret
-
-#ifdef CONFIG_VIDEO_SELECT
-# Fetching of VESA frame buffer parameters
-mopar_gr:
-	leaw	modelist+1024, %di
-	movb	$0x23, %fs:(PARAM_HAVE_VGA)
-	movw	16(%di), %ax
-	movw	%ax, %fs:(PARAM_LFB_LINELENGTH)
-	movw	18(%di), %ax
-	movw	%ax, %fs:(PARAM_LFB_WIDTH)
-	movw	20(%di), %ax
-	movw	%ax, %fs:(PARAM_LFB_HEIGHT)
-	movb	25(%di), %al
-	movb	$0, %ah
-	movw	%ax, %fs:(PARAM_LFB_DEPTH)
-	movb	29(%di), %al	
-	movb	$0, %ah
-	movw	%ax, %fs:(PARAM_LFB_PAGES)
-	movl	40(%di), %eax
-	movl	%eax, %fs:(PARAM_LFB_BASE)
-	movl	31(%di), %eax
-	movl	%eax, %fs:(PARAM_LFB_COLORS)
-	movl	35(%di), %eax
-	movl	%eax, %fs:(PARAM_LFB_COLORS+4)
-	movw	0(%di), %ax
-	movw	%ax, %fs:(PARAM_VESA_ATTRIB)
-
-# get video mem size
-	leaw	modelist+1024, %di
-	movw	$0x4f00, %ax
-	int	$0x10
-	xorl	%eax, %eax
-	movw	18(%di), %ax
-	movl	%eax, %fs:(PARAM_LFB_SIZE)
-
-# store mode capabilities
-	movl 10(%di), %eax
-	movl %eax, %fs:(PARAM_CAPABILITIES)
-
-# switching the DAC to 8-bit is for <= 8 bpp only
-	movw	%fs:(PARAM_LFB_DEPTH), %ax
-	cmpw	$8, %ax
-	jg	dac_done
-
-# get DAC switching capability
-	xorl	%eax, %eax
-	movb	10(%di), %al
-	testb	$1, %al
-	jz	dac_set
-
-# attempt to switch DAC to 8-bit
-	movw	$0x4f08, %ax
-	movw	$0x0800, %bx
-	int	$0x10
-	cmpw	$0x004f, %ax
-	jne     dac_set
-	movb    %bh, dac_size		# store actual DAC size
-
-dac_set:
-# set color size to DAC size
-	movb	dac_size, %al
-	movb	%al, %fs:(PARAM_LFB_COLORS+0)
-	movb	%al, %fs:(PARAM_LFB_COLORS+2)
-	movb	%al, %fs:(PARAM_LFB_COLORS+4)
-	movb	%al, %fs:(PARAM_LFB_COLORS+6)
-
-# set color offsets to 0
-	movb	$0, %fs:(PARAM_LFB_COLORS+1)
-	movb	$0, %fs:(PARAM_LFB_COLORS+3)
-	movb	$0, %fs:(PARAM_LFB_COLORS+5)
-	movb	$0, %fs:(PARAM_LFB_COLORS+7)
-
-dac_done:
-# get protected mode interface informations
-	movw	$0x4f0a, %ax
-	xorw	%bx, %bx
-	xorw	%di, %di
-	int	$0x10
-	cmp	$0x004f, %ax
-	jnz	no_pm
-
-	movw	%es, %fs:(PARAM_VESAPM_SEG)
-	movw	%di, %fs:(PARAM_VESAPM_OFF)
-no_pm:	ret
-
-# The video mode menu
-mode_menu:
-	leaw	keymsg, %si			# "Return/Space/Timeout" message
-	call	prtstr
-	call	flush
-nokey:	call	getkt
-
-	cmpb	$0x0d, %al			# ENTER ?
-	je	listm				# yes - manual mode selection
-
-	cmpb	$0x20, %al			# SPACE ?
-	je	defmd1				# no - repeat
-
-	call 	beep
-	jmp	nokey
-
-defmd1:	ret					# No mode chosen? Default 80x25
-
-listm:	call	mode_table			# List mode table
-listm0:	leaw	name_bann, %si			# Print adapter name
-	call	prtstr
-	movw	card_name, %si
-	orw	%si, %si
-	jnz	an2
-
-	movb	adapter, %al
-	leaw	old_name, %si
-	orb	%al, %al
-	jz	an1
-
-	leaw	ega_name, %si
-	decb	%al
-	jz	an1
-
-	leaw	vga_name, %si
-	jmp	an1
-
-an2:	call	prtstr
-	leaw	svga_name, %si
-an1:	call	prtstr
-	leaw	listhdr, %si			# Table header
-	call	prtstr
-	movb	$0x30, %dl			# DL holds mode number
-	leaw	modelist, %si
-lm1:	cmpw	$ASK_VGA, (%si)			# End?
-	jz	lm2
-
-	movb	%dl, %al			# Menu selection number
-	call	prtchr
-	call	prtsp2
-	lodsw
-	call	prthw				# Mode ID
-	call	prtsp2
-	movb	0x1(%si), %al
-	call	prtdec				# Rows
-	movb	$0x78, %al			# the letter 'x'
-	call	prtchr
-	lodsw
-	call	prtdec				# Columns
-	movb	$0x0d, %al			# New line
-	call	prtchr
-	movb	$0x0a, %al
-	call	prtchr
-	incb	%dl				# Next character
-	cmpb	$0x3a, %dl
-	jnz	lm1
-
-	movb	$0x61, %dl
-	jmp	lm1
-
-lm2:	leaw	prompt, %si			# Mode prompt
-	call	prtstr
-	leaw	edit_buf, %di			# Editor buffer
-lm3:	call	getkey
-	cmpb	$0x0d, %al			# Enter?
-	jz	lment
-
-	cmpb	$0x08, %al			# Backspace?
-	jz	lmbs
-
-	cmpb	$0x20, %al			# Printable?
-	jc	lm3
-
-	cmpw	$edit_buf+4, %di		# Enough space?
-	jz	lm3
-
-	stosb
-	call	prtchr
-	jmp	lm3
-
-lmbs:	cmpw	$edit_buf, %di			# Backspace
-	jz	lm3
-
-	decw	%di
-	movb	$0x08, %al
-	call	prtchr
-	call	prtspc
-	movb	$0x08, %al
-	call	prtchr
-	jmp	lm3
-	
-lment:	movb	$0, (%di)
-	leaw	crlft, %si
-	call	prtstr
-	leaw	edit_buf, %si
-	cmpb	$0, (%si)			# Empty string = default mode
-	jz	lmdef
-
-	cmpb	$0, 1(%si)			# One character = menu selection
-	jz	mnusel
-
-	cmpw	$0x6373, (%si)			# "scan" => mode scanning
-	jnz	lmhx
-
-	cmpw	$0x6e61, 2(%si)
-	jz	lmscan
-
-lmhx:	xorw	%bx, %bx			# Else => mode ID in hex
-lmhex:	lodsb
-	orb	%al, %al
-	jz	lmuse1
-
-	subb	$0x30, %al
-	jc	lmbad
-
-	cmpb	$10, %al
-	jc	lmhx1
-
-	subb	$7, %al
-	andb	$0xdf, %al
-	cmpb	$10, %al
-	jc	lmbad
-
-	cmpb	$16, %al
-	jnc	lmbad
-
-lmhx1:	shlw	$4, %bx
-	orb	%al, %bl
-	jmp	lmhex
-
-lmuse1:	movw	%bx, %ax
-	jmp	lmuse
-
-mnusel:	lodsb					# Menu selection
-	xorb	%ah, %ah
-	subb	$0x30, %al
-	jc	lmbad
-
-	cmpb	$10, %al
-	jc	lmuse
-	
-	cmpb	$0x61-0x30, %al
-	jc	lmbad
-	
-	subb	$0x61-0x30-10, %al
-	cmpb	$36, %al
-	jnc	lmbad
-
-lmuse:	call	mode_set
-	jc	lmdef
-
-lmbad:	leaw	unknt, %si
-	call	prtstr
-	jmp	lm2
-lmscan:	cmpb	$0, adapter			# Scanning only on EGA/VGA
-	jz	lmbad
-
-	movw	$0, mt_end			# Scanning of modes is
-	movb	$1, scanning			# done as new autodetection.
-	call	mode_table
-	jmp	listm0
-lmdef:	ret
-
-# Additional parts of mode_set... (relative jumps, you know)
-setv7:						# Video7 extended modes
-	DO_STORE
-	subb	$VIDEO_FIRST_V7>>8, %bh
-	movw	$0x6f05, %ax
-	int	$0x10
-	stc
-	ret
-
-_setrec:	jmp	setrec			# Ugly...
-_set_80x25:	jmp	set_80x25
-
-# Aliases for backward compatibility.
-setalias:
-	movw	$VIDEO_80x25, %ax
-	incw	%bx
-	jz	mode_set
-
-	movb	$VIDEO_8POINT-VIDEO_FIRST_SPECIAL, %al
-	incw	%bx
-	jnz	setbad				# Fall-through!
-
-# Setting of user mode (AX=mode ID) => CF=success
-mode_set:
-	movw	%ax, %fs:(0x01fa)		# Store mode for use in acpi_wakeup.S
-	movw	%ax, %bx
-	cmpb	$0xff, %ah
-	jz	setalias
-
-	testb	$VIDEO_RECALC>>8, %ah
-	jnz	_setrec
-
-	cmpb	$VIDEO_FIRST_RESOLUTION>>8, %ah
-	jnc	setres
-	
-	cmpb	$VIDEO_FIRST_SPECIAL>>8, %ah
-	jz	setspc
-	
-	cmpb	$VIDEO_FIRST_V7>>8, %ah
-	jz	setv7
-	
-	cmpb	$VIDEO_FIRST_VESA>>8, %ah
-	jnc	check_vesa
-	
-	orb	%ah, %ah
-	jz	setmenu
-	
-	decb	%ah
-	jz	setbios
-
-setbad:	clc
-	movb	$0, do_restore			# The screen needn't be restored
-	ret
-
-setvesa:
-	DO_STORE
-	subb	$VIDEO_FIRST_VESA>>8, %bh
-	movw	$0x4f02, %ax			# VESA BIOS mode set call
-	int	$0x10
-	cmpw	$0x004f, %ax			# AL=4f if implemented
-	jnz	setbad				# AH=0 if OK
-
-	stc
-	ret
-
-setbios:
-	DO_STORE
-	int	$0x10				# Standard BIOS mode set call
-	pushw	%bx
-	movb	$0x0f, %ah			# Check if really set
-	int	$0x10
-	popw	%bx
-	cmpb	%bl, %al
-	jnz	setbad
-	
-	stc
-	ret
-
-setspc:	xorb	%bh, %bh			# Set special mode
-	cmpb	$VIDEO_LAST_SPECIAL-VIDEO_FIRST_SPECIAL, %bl
-	jnc	setbad
-	
-	addw	%bx, %bx
-	jmp	*spec_inits(%bx)
-
-setmenu:
-	orb	%al, %al			# 80x25 is an exception
-	jz	_set_80x25
-	
-	pushw	%bx				# Set mode chosen from menu
-	call	mode_table			# Build the mode table
-	popw	%ax
-	shlw	$2, %ax
-	addw	%ax, %si
-	cmpw	%di, %si
-	jnc	setbad
-	
-	movw	(%si), %ax			# Fetch mode ID
-_m_s:	jmp	mode_set
-
-setres:	pushw	%bx				# Set mode chosen by resolution
-	call	mode_table
-	popw	%bx
-	xchgb	%bl, %bh
-setr1:	lodsw
-	cmpw	$ASK_VGA, %ax			# End of the list?
-	jz	setbad
-	
-	lodsw
-	cmpw	%bx, %ax
-	jnz	setr1
-	
-	movw	-4(%si), %ax			# Fetch mode ID
-	jmp	_m_s
-
-check_vesa:
-#ifdef CONFIG_FIRMWARE_EDID
-	leaw	modelist+1024, %di
-	movw	$0x4f00, %ax
-	int	$0x10
-	cmpw	$0x004f, %ax
-	jnz	setbad
-
-	movw	4(%di), %ax
-	movw	%ax, vbe_version
-#endif
-	leaw	modelist+1024, %di
-	subb	$VIDEO_FIRST_VESA>>8, %bh
-	movw	%bx, %cx			# Get mode information structure
-	movw	$0x4f01, %ax
-	int	$0x10
-	addb	$VIDEO_FIRST_VESA>>8, %bh
-	cmpw	$0x004f, %ax
-	jnz	setbad
-
-	movb	(%di), %al			# Check capabilities.
-	andb	$0x19, %al
-	cmpb	$0x09, %al
-	jz	setvesa				# This is a text mode
-
-	movb	(%di), %al			# Check capabilities.
-	andb	$0x99, %al
-	cmpb	$0x99, %al
-	jnz	_setbad				# Doh! No linear frame buffer.
-
-	subb	$VIDEO_FIRST_VESA>>8, %bh
-	orw	$0x4000, %bx			# Use linear frame buffer
-	movw	$0x4f02, %ax			# VESA BIOS mode set call
-	int	$0x10
-	cmpw	$0x004f, %ax			# AL=4f if implemented
-	jnz	_setbad				# AH=0 if OK
-
-	movb	$1, graphic_mode		# flag graphic mode
-	movb	$0, do_restore			# no screen restore
-	stc
-	ret
-
-_setbad:	jmp	setbad          	# Ugly...
-
-# Recalculate vertical display end registers -- this fixes various
-# inconsistencies of extended modes on many adapters. Called when
-# the VIDEO_RECALC flag is set in the mode ID.
-
-setrec:	subb	$VIDEO_RECALC>>8, %ah		# Set the base mode
-	call	mode_set
-	jnc	rct3
-
-	movw	%gs:(0x485), %ax		# Font size in pixels
-	movb	%gs:(0x484), %bl		# Number of rows
-	incb	%bl
-	mulb	%bl				# Number of visible
-	decw	%ax				# scan lines - 1
-	movw	$0x3d4, %dx
-	movw	%ax, %bx
-	movb	$0x12, %al			# Lower 8 bits
-	movb	%bl, %ah
-	outw	%ax, %dx
-	movb	$0x07, %al		# Bits 8 and 9 in the overflow register
-	call	inidx
-	xchgb	%al, %ah
-	andb	$0xbd, %ah
-	shrb	%bh
-	jnc	rct1
-	orb	$0x02, %ah
-rct1:	shrb	%bh
-	jnc	rct2
-	orb	$0x40, %ah
-rct2:	movb	$0x07, %al
-	outw	%ax, %dx
-	stc
-rct3:	ret
-
-# Table of routines for setting of the special modes.
-spec_inits:
-	.word	set_80x25
-	.word	set_8pixel
-	.word	set_80x43
-	.word	set_80x28
-	.word	set_current
-	.word	set_80x30
-	.word	set_80x34
-	.word	set_80x60
-	.word	set_gfx
-
-# Set the 80x25 mode. If already set, do nothing.
-set_80x25:
-	movw	$0x5019, force_size		# Override possibly broken BIOS
-use_80x25:
-#ifdef CONFIG_VIDEO_400_HACK
-	movw	$0x1202, %ax			# Force 400 scan lines
-	movb	$0x30, %bl
-	int	$0x10
-#else
-	movb	$0x0f, %ah			# Get current mode ID
-	int	$0x10
-	cmpw	$0x5007, %ax	# Mode 7 (80x25 mono) is the only one available
-	jz	st80		# on CGA/MDA/HGA and is also available on EGAM
-
-	cmpw	$0x5003, %ax	# Unknown mode, force 80x25 color
-	jnz	force3
-
-st80:	cmpb	$0, adapter	# CGA/MDA/HGA => mode 3/7 is always 80x25
-	jz	set80
-
-	movb	%gs:(0x0484), %al	# This is EGA+ -- beware of 80x50 etc.
-	orb	%al, %al		# Some buggy BIOS'es set 0 rows
-	jz	set80
-	
-	cmpb	$24, %al		# It's hopefully correct
-	jz	set80
-#endif /* CONFIG_VIDEO_400_HACK */
-force3:	DO_STORE
-	movw	$0x0003, %ax			# Forced set
-	int	$0x10
-set80:	stc
-	ret
-
-# Set the 80x50/80x43 8-pixel mode. Simple BIOS calls.
-set_8pixel:
-	DO_STORE
-	call	use_80x25			# The base is 80x25
-set_8pt:
-	movw	$0x1112, %ax			# Use 8x8 font
-	xorb	%bl, %bl
-	int	$0x10
-	movw	$0x1200, %ax			# Use alternate print screen
-	movb	$0x20, %bl
-	int	$0x10
-	movw	$0x1201, %ax			# Turn off cursor emulation
-	movb	$0x34, %bl
-	int	$0x10
-	movb	$0x01, %ah			# Define cursor scan lines 6-7
-	movw	$0x0607, %cx
-	int	$0x10
-set_current:
-	stc
-	ret
-
-# Set the 80x28 mode. This mode works on all VGA's, because it's a standard
-# 80x25 mode with 14-point fonts instead of 16-point.
-set_80x28:
-	DO_STORE
-	call	use_80x25			# The base is 80x25
-set14:	movw	$0x1111, %ax			# Use 9x14 font
-	xorb	%bl, %bl
-	int	$0x10
-	movb	$0x01, %ah			# Define cursor scan lines 11-12
-	movw	$0x0b0c, %cx
-	int	$0x10
-	stc
-	ret
-
-# Set the 80x43 mode. This mode is works on all VGA's.
-# It's a 350-scanline mode with 8-pixel font.
-set_80x43:
-	DO_STORE
-	movw	$0x1201, %ax			# Set 350 scans
-	movb	$0x30, %bl
-	int	$0x10
-	movw	$0x0003, %ax			# Reset video mode
-	int	$0x10
-	jmp	set_8pt				# Use 8-pixel font
-
-# Set the 80x30 mode (all VGA's). 480 scanlines, 16-pixel font.
-set_80x30:
-	call	use_80x25			# Start with real 80x25
-	DO_STORE
-	movw	$0x3cc, %dx			# Get CRTC port
-	inb	%dx, %al
-	movb	$0xd4, %dl
-	rorb	%al				# Mono or color?
-	jc	set48a
-
-	movb	$0xb4, %dl
-set48a:	movw	$0x0c11, %ax		# Vertical sync end (also unlocks CR0-7)
- 	call	outidx
-	movw	$0x0b06, %ax			# Vertical total
- 	call	outidx
-	movw	$0x3e07, %ax			# (Vertical) overflow
- 	call	outidx
-	movw	$0xea10, %ax			# Vertical sync start
- 	call	outidx
-	movw	$0xdf12, %ax			# Vertical display end
-	call	outidx
-	movw	$0xe715, %ax			# Vertical blank start
- 	call	outidx
-	movw	$0x0416, %ax			# Vertical blank end
- 	call	outidx
-	pushw	%dx
-	movb	$0xcc, %dl			# Misc output register (read)
- 	inb	%dx, %al
- 	movb	$0xc2, %dl			# (write)
- 	andb	$0x0d, %al	# Preserve clock select bits and color bit
- 	orb	$0xe2, %al			# Set correct sync polarity
- 	outb	%al, %dx
-	popw	%dx
-	movw	$0x501e, force_size
-	stc					# That's all.
-	ret
-
-# Set the 80x34 mode (all VGA's). 480 scans, 14-pixel font.
-set_80x34:
-	call	set_80x30			# Set 480 scans
-	call	set14				# And 14-pt font
-	movw	$0xdb12, %ax			# VGA vertical display end
-	movw	$0x5022, force_size
-setvde:	call	outidx
-	stc
-	ret
-
-# Set the 80x60 mode (all VGA's). 480 scans, 8-pixel font.
-set_80x60:
-	call	set_80x30			# Set 480 scans
-	call	set_8pt				# And 8-pt font
-	movw	$0xdf12, %ax			# VGA vertical display end
-	movw	$0x503c, force_size
-	jmp	setvde
-
-# Special hack for ThinkPad graphics
-set_gfx:
-#ifdef CONFIG_VIDEO_GFX_HACK
-	movw	$VIDEO_GFX_BIOS_AX, %ax
-	movw	$VIDEO_GFX_BIOS_BX, %bx
-	int	$0x10
-	movw	$VIDEO_GFX_DUMMY_RESOLUTION, force_size
-	stc
-#endif
-	ret
-
-#ifdef CONFIG_VIDEO_RETAIN
-
-# Store screen contents to temporary buffer.
-store_screen:
-	cmpb	$0, do_restore			# Already stored?
-	jnz	stsr
-
-	testb	$CAN_USE_HEAP, loadflags	# Have we space for storing?
-	jz	stsr
-	
-	pushw	%ax
-	pushw	%bx
-	pushw	force_size			# Don't force specific size
-	movw	$0, force_size
-	call	mode_params			# Obtain params of current mode
-	popw	force_size
-	movb	%fs:(PARAM_VIDEO_LINES), %ah
-	movb	%fs:(PARAM_VIDEO_COLS), %al
-	movw	%ax, %bx			# BX=dimensions
-	mulb	%ah
-	movw	%ax, %cx			# CX=number of characters
-	addw	%ax, %ax			# Calculate image size
-	addw	$modelist+1024+4, %ax
-	cmpw	heap_end_ptr, %ax
-	jnc	sts1				# Unfortunately, out of memory
-
-	movw	%fs:(PARAM_CURSOR_POS), %ax	# Store mode params
-	leaw	modelist+1024, %di
-	stosw
-	movw	%bx, %ax
-	stosw
-	pushw	%ds				# Store the screen
-	movw	video_segment, %ds
-	xorw	%si, %si
-	rep
-	movsw
-	popw	%ds
-	incb	do_restore			# Screen will be restored later
-sts1:	popw	%bx
-	popw	%ax
-stsr:	ret
-
-# Restore screen contents from temporary buffer.
-restore_screen:
-	cmpb	$0, do_restore			# Has the screen been stored?
-	jz	res1
-
-	call	mode_params			# Get parameters of current mode
-	movb	%fs:(PARAM_VIDEO_LINES), %cl
-	movb	%fs:(PARAM_VIDEO_COLS), %ch
-	leaw	modelist+1024, %si		# Screen buffer
-	lodsw					# Set cursor position
-	movw	%ax, %dx
-	cmpb	%cl, %dh
-	jc	res2
-	
-	movb	%cl, %dh
-	decb	%dh
-res2:	cmpb	%ch, %dl
-	jc	res3
-	
-	movb	%ch, %dl
-	decb	%dl
-res3:	movb	$0x02, %ah
-	movb	$0x00, %bh
-	int	$0x10
-	lodsw					# Display size
-	movb	%ah, %dl			# DL=number of lines
-	movb	$0, %ah				# BX=phys. length of orig. line
-	movw	%ax, %bx
-	cmpb	%cl, %dl			# Too many?
-	jc	res4
-
-	pushw	%ax
-	movb	%dl, %al
-	subb	%cl, %al
-	mulb	%bl
-	addw	%ax, %si
-	addw	%ax, %si
-	popw	%ax
-	movb	%cl, %dl
-res4:	cmpb	%ch, %al			# Too wide?
-	jc	res5
-	
-	movb	%ch, %al			# AX=width of src. line
-res5:	movb	$0, %cl
-	xchgb	%ch, %cl
-	movw	%cx, %bp			# BP=width of dest. line
-	pushw	%es
-	movw	video_segment, %es
-	xorw	%di, %di			# Move the data
-	addw	%bx, %bx			# Convert BX and BP to _bytes_
-	addw	%bp, %bp
-res6:	pushw	%si
-	pushw	%di
-	movw	%ax, %cx
-	rep
-	movsw
-	popw	%di
-	popw	%si
-	addw	%bp, %di
-	addw	%bx, %si
-	decb	%dl
-	jnz	res6
-	
-	popw	%es				# Done
-res1:	ret
-#endif /* CONFIG_VIDEO_RETAIN */
-
-# Write to indexed VGA register (AL=index, AH=data, DX=index reg. port)
-outidx:	outb	%al, %dx
-	pushw	%ax
-	movb	%ah, %al
-	incw	%dx
-	outb	%al, %dx
-	decw	%dx
-	popw	%ax
-	ret
-
-# Build the table of video modes (stored after the setup.S code at the
-# `modelist' label. Each video mode record looks like:
-#	.word	MODE-ID		(our special mode ID (see above))
-#	.byte	rows		(number of rows)
-#	.byte	columns		(number of columns)
-# Returns address of the end of the table in DI, the end is marked
-# with a ASK_VGA ID.
-mode_table:
-	movw	mt_end, %di			# Already filled?
-	orw	%di, %di
-	jnz	mtab1x
-	
-	leaw	modelist, %di			# Store standard modes:
-	movl	$VIDEO_80x25 + 0x50190000, %eax	# The 80x25 mode (ALL)
-	stosl
-	movb	adapter, %al			# CGA/MDA/HGA -- no more modes
-	orb	%al, %al
-	jz	mtabe
-	
-	decb	%al
-	jnz	mtabv
-	
-	movl	$VIDEO_8POINT + 0x502b0000, %eax	# The 80x43 EGA mode
-	stosl
-	jmp	mtabe
-
-mtab1x:	jmp	mtab1
-
-mtabv:	leaw	vga_modes, %si			# All modes for std VGA
-	movw	$vga_modes_end-vga_modes, %cx
-	rep	# I'm unable to use movsw as I don't know how to store a half
-	movsb	# of the expression above to cx without using explicit shr.
-
-	cmpb	$0, scanning			# Mode scan requested?
-	jz	mscan1
-	
-	call	mode_scan
-mscan1:
-
-#ifdef CONFIG_VIDEO_LOCAL
-	call	local_modes
-#endif /* CONFIG_VIDEO_LOCAL */
-
-#ifdef CONFIG_VIDEO_VESA
-	call	vesa_modes			# Detect VESA VGA modes
-#endif /* CONFIG_VIDEO_VESA */
-
-#ifdef CONFIG_VIDEO_SVGA
-	cmpb	$0, scanning			# Bypass when scanning
-	jnz	mscan2
-	
-	call	svga_modes			# Detect SVGA cards & modes
-mscan2:
-#endif /* CONFIG_VIDEO_SVGA */
-
-mtabe:
-
-#ifdef CONFIG_VIDEO_COMPACT
-	leaw	modelist, %si
-	movw	%di, %dx
-	movw	%si, %di
-cmt1:	cmpw	%dx, %si			# Scan all modes
-	jz	cmt2
-
-	leaw	modelist, %bx			# Find in previous entries
-	movw	2(%si), %cx
-cmt3:	cmpw	%bx, %si
-	jz	cmt4
-
-	cmpw	2(%bx), %cx			# Found => don't copy this entry
-	jz	cmt5
-
-	addw	$4, %bx
-	jmp	cmt3
-
-cmt4:	movsl					# Copy entry
-	jmp	cmt1
-
-cmt5:	addw	$4, %si				# Skip entry
-	jmp	cmt1
-
-cmt2:
-#endif	/* CONFIG_VIDEO_COMPACT */
-
-	movw	$ASK_VGA, (%di)			# End marker
-	movw	%di, mt_end
-mtab1:	leaw	modelist, %si			# SI=mode list, DI=list end
-ret0:	ret
-
-# Modes usable on all standard VGAs
-vga_modes:
-	.word	VIDEO_8POINT
-	.word	0x5032				# 80x50
-	.word	VIDEO_80x43
-	.word	0x502b				# 80x43
-	.word	VIDEO_80x28
-	.word	0x501c				# 80x28
-	.word	VIDEO_80x30
-	.word	0x501e				# 80x30
-	.word	VIDEO_80x34
-	.word	0x5022				# 80x34
-	.word	VIDEO_80x60
-	.word	0x503c				# 80x60
-#ifdef CONFIG_VIDEO_GFX_HACK
-	.word	VIDEO_GFX_HACK
-	.word	VIDEO_GFX_DUMMY_RESOLUTION
-#endif
-
-vga_modes_end:
-# Detect VESA modes.
-
-#ifdef CONFIG_VIDEO_VESA
-vesa_modes:
-	cmpb	$2, adapter			# VGA only
-	jnz	ret0
-
-	movw	%di, %bp			# BP=original mode table end
-	addw	$0x200, %di			# Buffer space
-	movw	$0x4f00, %ax			# VESA Get card info call
-	int	$0x10
-	movw	%bp, %di
-	cmpw	$0x004f, %ax			# Successful?
-	jnz	ret0
-	
-	cmpw	$0x4556, 0x200(%di)
-	jnz	ret0
-	
-	cmpw	$0x4153, 0x202(%di)
-	jnz	ret0
-	
-	movw	$vesa_name, card_name		# Set name to "VESA VGA"
-	pushw	%gs
-	lgsw	0x20e(%di), %si			# GS:SI=mode list
-	movw	$128, %cx			# Iteration limit
-vesa1:
-# gas version 2.9.1, using BFD version 2.9.1.0.23 buggers the next inst.
-# XXX:	lodsw	%gs:(%si), %ax			# Get next mode in the list
-	gs; lodsw
-	cmpw	$0xffff, %ax			# End of the table?
-	jz	vesar
-	
-	cmpw	$0x0080, %ax			# Check validity of mode ID
-	jc	vesa2
-	
-	orb	%ah, %ah		# Valid IDs: 0x0000-0x007f/0x0100-0x07ff
-	jz	vesan			# Certain BIOSes report 0x80-0xff!
-
-	cmpw	$0x0800, %ax
-	jnc	vesae
-
-vesa2:	pushw	%cx
-	movw	%ax, %cx			# Get mode information structure
-	movw	$0x4f01, %ax
-	int	$0x10
-	movw	%cx, %bx			# BX=mode number
-	addb	$VIDEO_FIRST_VESA>>8, %bh
-	popw	%cx
-	cmpw	$0x004f, %ax
-	jnz	vesan			# Don't report errors (buggy BIOSES)
-
-	movb	(%di), %al			# Check capabilities. We require
-	andb	$0x19, %al			# a color text mode.
-	cmpb	$0x09, %al
-	jnz	vesan
-	
-	cmpw	$0xb800, 8(%di)		# Standard video memory address required
-	jnz	vesan
-
-	testb	$2, (%di)			# Mode characteristics supplied?
-	movw	%bx, (%di)			# Store mode number
-	jz	vesa3
-	
-	xorw	%dx, %dx
-	movw	0x12(%di), %bx			# Width
-	orb	%bh, %bh
-	jnz	vesan
-	
-	movb	%bl, 0x3(%di)
-	movw	0x14(%di), %ax			# Height
-	orb	%ah, %ah
-	jnz	vesan
-	
-	movb	%al, 2(%di)
-	mulb	%bl
-	cmpw	$8193, %ax		# Small enough for Linux console driver?
-	jnc	vesan
-
-	jmp	vesaok
-
-vesa3:	subw	$0x8108, %bx	# This mode has no detailed info specified,
-	jc	vesan		# so it must be a standard VESA mode.
-
-	cmpw	$5, %bx
-	jnc	vesan
-
-	movw	vesa_text_mode_table(%bx), %ax
-	movw	%ax, 2(%di)
-vesaok:	addw	$4, %di				# The mode is valid. Store it.
-vesan:	loop	vesa1			# Next mode. Limit exceeded => error
-vesae:	leaw	vesaer, %si
-	call	prtstr
-	movw	%bp, %di			# Discard already found modes.
-vesar:	popw	%gs
-	ret
-
-# Dimensions of standard VESA text modes
-vesa_text_mode_table:
-	.byte	60, 80				# 0108
-	.byte	25, 132				# 0109
-	.byte	43, 132				# 010A
-	.byte	50, 132				# 010B
-	.byte	60, 132				# 010C
-#endif	/* CONFIG_VIDEO_VESA */
-
-# Scan for video modes. A bit dirty, but should work.
-mode_scan:
-	movw	$0x0100, %cx			# Start with mode 0
-scm1:	movb	$0, %ah				# Test the mode
-	movb	%cl, %al
-	int	$0x10
-	movb	$0x0f, %ah
-	int	$0x10
-	cmpb	%cl, %al
-	jnz	scm2				# Mode not set
-
-	movw	$0x3c0, %dx			# Test if it's a text mode
-	movb	$0x10, %al			# Mode bits
-	call	inidx
-	andb	$0x03, %al
-	jnz	scm2
-	
-	movb	$0xce, %dl			# Another set of mode bits
-	movb	$0x06, %al
-	call	inidx
-	shrb	%al
-	jc	scm2
-	
-	movb	$0xd4, %dl			# Cursor location
-	movb	$0x0f, %al
-	call	inidx
-	orb	%al, %al
-	jnz	scm2
-	
-	movw	%cx, %ax			# Ok, store the mode
-	stosw
-	movb	%gs:(0x484), %al		# Number of rows
-	incb	%al
-	stosb
-	movw	%gs:(0x44a), %ax		# Number of columns
-	stosb
-scm2:	incb	%cl
-	jns	scm1
-	
-	movw	$0x0003, %ax			# Return back to mode 3
-	int	$0x10
-	ret
-
-tstidx:	outw	%ax, %dx			# OUT DX,AX and inidx
-inidx:	outb	%al, %dx			# Read from indexed VGA register
-	incw	%dx			# AL=index, DX=index reg port -> AL=data
-	inb	%dx, %al
-	decw	%dx
-	ret
-
-# Try to detect type of SVGA card and supply (usually approximate) video
-# mode table for it.
-
-#ifdef CONFIG_VIDEO_SVGA
-svga_modes:
-	leaw	svga_table, %si			# Test all known SVGA adapters
-dosvga:	lodsw
-	movw	%ax, %bp			# Default mode table
-	orw	%ax, %ax
-	jz	didsv1
-
-	lodsw					# Pointer to test routine
-	pushw	%si
-	pushw	%di
-	pushw	%es
-	movw	$0xc000, %bx
-	movw	%bx, %es
-	call	*%ax				# Call test routine
-	popw	%es
-	popw	%di
-	popw	%si
-	orw	%bp, %bp
-	jz	dosvga
-	
-	movw	%bp, %si			# Found, copy the modes
-	movb	svga_prefix, %ah
-cpsvga:	lodsb
-	orb	%al, %al
-	jz	didsv
-	
-	stosw
-	movsw
-	jmp	cpsvga
-
-didsv:	movw	%si, card_name			# Store pointer to card name
-didsv1:	ret
-
-# Table of all known SVGA cards. For each card, we store a pointer to
-# a table of video modes supported by the card and a pointer to a routine
-# used for testing of presence of the card. The video mode table is always
-# followed by the name of the card or the chipset.
-svga_table:
-	.word	ati_md, ati_test
-	.word	oak_md, oak_test
-	.word	paradise_md, paradise_test
-	.word	realtek_md, realtek_test
-	.word	s3_md, s3_test
-	.word	chips_md, chips_test
-	.word	video7_md, video7_test
-	.word	cirrus5_md, cirrus5_test
-	.word	cirrus6_md, cirrus6_test
-	.word	cirrus1_md, cirrus1_test
-	.word	ahead_md, ahead_test
-	.word	everex_md, everex_test
-	.word	genoa_md, genoa_test
-	.word	trident_md, trident_test
-	.word	tseng_md, tseng_test
-	.word	0
-
-# Test routines and mode tables:
-
-# S3 - The test algorithm was taken from the SuperProbe package
-# for XFree86 1.2.1. Report bugs to Christoph.Niemann@linux.org
-s3_test:
-	movw	$0x0f35, %cx	# we store some constants in cl/ch
-	movw	$0x03d4, %dx
-	movb	$0x38, %al
-	call	inidx
-	movb	%al, %bh	# store current CRT-register 0x38
-	movw	$0x0038, %ax
-	call	outidx		# disable writing to special regs
-	movb	%cl, %al	# check whether we can write special reg 0x35
-	call	inidx
-	movb	%al, %bl	# save the current value of CRT reg 0x35
-	andb	$0xf0, %al	# clear bits 0-3
-	movb	%al, %ah
-	movb	%cl, %al	# and write it to CRT reg 0x35
-	call	outidx
-	call	inidx		# now read it back
-	andb	%ch, %al	# clear the upper 4 bits
-	jz	s3_2		# the first test failed. But we have a
-
-	movb	%bl, %ah	# second chance
-	movb	%cl, %al
-	call	outidx
-	jmp	s3_1		# do the other tests
-
-s3_2:	movw	%cx, %ax	# load ah with 0xf and al with 0x35
-	orb	%bl, %ah	# set the upper 4 bits of ah with the orig value
-	call	outidx		# write ...
-	call	inidx		# ... and reread 
-	andb	%cl, %al	# turn off the upper 4 bits
-	pushw	%ax
-	movb	%bl, %ah	# restore old value in register 0x35
-	movb	%cl, %al
-	call	outidx
-	popw	%ax
-	cmpb	%ch, %al	# setting lower 4 bits was successful => bad
-	je	no_s3		# writing is allowed => this is not an S3
-
-s3_1:	movw	$0x4838, %ax	# allow writing to special regs by putting
-	call	outidx		# magic number into CRT-register 0x38
-	movb	%cl, %al	# check whether we can write special reg 0x35
-	call	inidx
-	movb	%al, %bl
-	andb	$0xf0, %al
-	movb	%al, %ah
-	movb	%cl, %al
-	call	outidx
-	call	inidx
-	andb	%ch, %al
-	jnz	no_s3		# no, we can't write => no S3
-
-	movw	%cx, %ax
-	orb	%bl, %ah
-	call	outidx
-	call	inidx
-	andb	%ch, %al
-	pushw	%ax
-	movb	%bl, %ah	# restore old value in register 0x35
-	movb	%cl, %al
-	call	outidx
-	popw	%ax
-	cmpb	%ch, %al
-	jne	no_s31		# writing not possible => no S3
-	movb	$0x30, %al
-	call	inidx		# now get the S3 id ...
-	leaw	idS3, %di
-	movw	$0x10, %cx
-	repne
-	scasb
-	je	no_s31
-
-	movb	%bh, %ah
-	movb	$0x38, %al
-	jmp	s3rest
-
-no_s3:	movb	$0x35, %al	# restore CRT register 0x35
-	movb	%bl, %ah
-	call	outidx
-no_s31:	xorw	%bp, %bp	# Detection failed
-s3rest:	movb	%bh, %ah
-	movb	$0x38, %al	# restore old value of CRT register 0x38
-	jmp	outidx
-
-idS3:	.byte	0x81, 0x82, 0x90, 0x91, 0x92, 0x93, 0x94, 0x95
-	.byte	0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa8, 0xb0
-
-s3_md:	.byte	0x54, 0x2b, 0x84
-	.byte	0x55, 0x19, 0x84
-	.byte	0
-	.ascii	"S3"
-	.byte	0
-
-# ATI cards.
-ati_test:
-	leaw 	idati, %si
-	movw	$0x31, %di
-	movw	$0x09, %cx
-	repe
-	cmpsb
-	je	atiok
-
-	xorw	%bp, %bp
-atiok:	ret
-
-idati:	.ascii	"761295520"
-
-ati_md:	.byte	0x23, 0x19, 0x84
-	.byte	0x33, 0x2c, 0x84
-	.byte	0x22, 0x1e, 0x64
-	.byte	0x21, 0x19, 0x64
-	.byte	0x58, 0x21, 0x50
-	.byte	0x5b, 0x1e, 0x50
-	.byte	0
-	.ascii	"ATI"
-	.byte	0
-
-# AHEAD
-ahead_test:
-	movw	$0x200f, %ax
-	movw	$0x3ce, %dx
-	outw	%ax, %dx
-	incw	%dx
-	inb	%dx, %al
-	cmpb	$0x20, %al
-	je	isahed
-
-	cmpb	$0x21, %al
-	je	isahed
-	
-	xorw	%bp, %bp
-isahed:	ret
-
-ahead_md:
-	.byte	0x22, 0x2c, 0x84
-	.byte	0x23, 0x19, 0x84
-	.byte	0x24, 0x1c, 0x84
-	.byte	0x2f, 0x32, 0xa0
-	.byte	0x32, 0x22, 0x50
-	.byte	0x34, 0x42, 0x50
-	.byte	0
-	.ascii	"Ahead"
-	.byte	0
-
-# Chips & Tech.
-chips_test:
-	movw	$0x3c3, %dx
-	inb	%dx, %al
-	orb	$0x10, %al
-	outb	%al, %dx
-	movw	$0x104, %dx
-	inb	%dx, %al
-	movb	%al, %bl
-	movw	$0x3c3, %dx
-	inb	%dx, %al
-	andb	$0xef, %al
-	outb	%al, %dx
-	cmpb	$0xa5, %bl
-	je	cantok
-	
-	xorw	%bp, %bp
-cantok:	ret
-
-chips_md:
-	.byte	0x60, 0x19, 0x84
-	.byte	0x61, 0x32, 0x84
-	.byte	0
-	.ascii	"Chips & Technologies"
-	.byte	0
-
-# Cirrus Logic 5X0
-cirrus1_test:
-	movw	$0x3d4, %dx
-	movb	$0x0c, %al
-	outb	%al, %dx
-	incw	%dx
-	inb	%dx, %al
-	movb	%al, %bl
-	xorb	%al, %al
-	outb	%al, %dx
-	decw	%dx
-	movb	$0x1f, %al
-	outb	%al, %dx
-	incw	%dx
-	inb	%dx, %al
-	movb	%al, %bh
-	xorb	%ah, %ah
-	shlb	$4, %al
-	movw	%ax, %cx
-	movb	%bh, %al
-	shrb	$4, %al
-	addw	%ax, %cx
-	shlw	$8, %cx
-	addw	$6, %cx
-	movw	%cx, %ax
-	movw	$0x3c4, %dx
-	outw	%ax, %dx
-	incw	%dx
-	inb	%dx, %al
-	andb	%al, %al
-	jnz	nocirr
-	
-	movb	%bh, %al
-	outb	%al, %dx
-	inb	%dx, %al
-	cmpb	$0x01, %al
-	je	iscirr
-
-nocirr:	xorw	%bp, %bp
-iscirr: movw	$0x3d4, %dx
-	movb	%bl, %al
-	xorb	%ah, %ah
-	shlw	$8, %ax
-	addw	$0x0c, %ax
-	outw	%ax, %dx
-	ret
-
-cirrus1_md:
-	.byte	0x1f, 0x19, 0x84
-	.byte	0x20, 0x2c, 0x84
-	.byte	0x22, 0x1e, 0x84
-	.byte	0x31, 0x25, 0x64
-	.byte	0
-	.ascii	"Cirrus Logic 5X0"
-	.byte	0
-
-# Cirrus Logic 54XX
-cirrus5_test:
-	movw	$0x3c4, %dx
-	movb	$6, %al
-	call	inidx
-	movb	%al, %bl			# BL=backup
-	movw	$6, %ax
-	call	tstidx
-	cmpb	$0x0f, %al
-	jne	c5fail
-	
-	movw	$0x1206, %ax
-	call	tstidx
-	cmpb	$0x12, %al
-	jne	c5fail
-	
-	movb	$0x1e, %al
-	call	inidx
-	movb	%al, %bh
-	movb	%bh, %ah
-	andb	$0xc0, %ah
-	movb	$0x1e, %al
-	call	tstidx
-	andb	$0x3f, %al
-	jne	c5xx
-	
-	movb	$0x1e, %al
-	movb	%bh, %ah
-	orb	$0x3f, %ah
-	call	tstidx
-	xorb	$0x3f, %al
-	andb	$0x3f, %al
-c5xx:	pushf
-	movb	$0x1e, %al
-	movb	%bh, %ah
-	outw	%ax, %dx
-	popf
-	je	c5done
-
-c5fail:	xorw	%bp, %bp
-c5done:	movb	$6, %al
-	movb	%bl, %ah
-	outw	%ax, %dx
-	ret
-
-cirrus5_md:
-	.byte	0x14, 0x19, 0x84
-	.byte	0x54, 0x2b, 0x84
-	.byte	0
-	.ascii	"Cirrus Logic 54XX"
-	.byte	0
-
-# Cirrus Logic 64XX -- no known extra modes, but must be identified, because
-# it's misidentified by the Ahead test.
-cirrus6_test:
-	movw	$0x3ce, %dx
-	movb	$0x0a, %al
-	call	inidx
-	movb	%al, %bl	# BL=backup
-	movw	$0xce0a, %ax
-	call	tstidx
-	orb	%al, %al
-	jne	c2fail
-	
-	movw	$0xec0a, %ax
-	call	tstidx
-	cmpb	$0x01, %al
-	jne	c2fail
-	
-	movb	$0xaa, %al
-	call	inidx		# 4X, 5X, 7X and 8X are valid 64XX chip ID's. 
-	shrb	$4, %al
-	subb	$4, %al
-	jz	c6done
-	
-	decb	%al
-	jz	c6done
-	
-	subb	$2, %al
-	jz	c6done
-	
-	decb	%al
-	jz	c6done
-	
-c2fail:	xorw	%bp, %bp
-c6done:	movb	$0x0a, %al
-	movb	%bl, %ah
-	outw	%ax, %dx
-	ret
-
-cirrus6_md:
-	.byte	0
-	.ascii	"Cirrus Logic 64XX"
-	.byte	0
-
-# Everex / Trident
-everex_test:
-	movw	$0x7000, %ax
-	xorw	%bx, %bx
-	int	$0x10
-	cmpb	$0x70, %al
-	jne	noevrx
-	
-	shrw	$4, %dx
-	cmpw	$0x678, %dx
-	je	evtrid
-	
-	cmpw	$0x236, %dx
-	jne	evrxok
-
-evtrid:	leaw	trident_md, %bp
-evrxok:	ret
-
-noevrx:	xorw	%bp, %bp
-	ret
-
-everex_md:
-	.byte	0x03, 0x22, 0x50
-	.byte	0x04, 0x3c, 0x50
-	.byte	0x07, 0x2b, 0x64
-	.byte	0x08, 0x4b, 0x64
-	.byte	0x0a, 0x19, 0x84
-	.byte	0x0b, 0x2c, 0x84
-	.byte	0x16, 0x1e, 0x50
-	.byte	0x18, 0x1b, 0x64
-	.byte	0x21, 0x40, 0xa0
-	.byte	0x40, 0x1e, 0x84
-	.byte	0
-	.ascii	"Everex/Trident"
-	.byte	0
-
-# Genoa.
-genoa_test:
-	leaw	idgenoa, %si			# Check Genoa 'clues'
-	xorw	%ax, %ax
-	movb	%es:(0x37), %al
-	movw	%ax, %di
-	movw	$0x04, %cx
-	decw	%si
-	decw	%di
-l1:	incw	%si
-	incw	%di
-	movb	(%si), %al
-	testb	%al, %al
-	jz	l2
-
-	cmpb	%es:(%di), %al
-l2:	loope 	l1
-	orw	%cx, %cx
-	je	isgen
-	
-	xorw	%bp, %bp
-isgen:	ret
-
-idgenoa: .byte	0x77, 0x00, 0x99, 0x66
-
-genoa_md:
-	.byte	0x58, 0x20, 0x50
-	.byte	0x5a, 0x2a, 0x64
-	.byte	0x60, 0x19, 0x84
-	.byte	0x61, 0x1d, 0x84
-	.byte	0x62, 0x20, 0x84
-	.byte	0x63, 0x2c, 0x84
-	.byte	0x64, 0x3c, 0x84
-	.byte	0x6b, 0x4f, 0x64
-	.byte	0x72, 0x3c, 0x50
-	.byte	0x74, 0x42, 0x50
-	.byte	0x78, 0x4b, 0x64
-	.byte	0
-	.ascii	"Genoa"
-	.byte	0
-
-# OAK
-oak_test:
-	leaw	idoakvga, %si
-	movw	$0x08, %di
-	movw	$0x08, %cx
-	repe
-	cmpsb
-	je	isoak
-	
-	xorw	%bp, %bp
-isoak:	ret
-
-idoakvga: .ascii  "OAK VGA "
-
-oak_md: .byte	0x4e, 0x3c, 0x50
-	.byte	0x4f, 0x3c, 0x84
-	.byte	0x50, 0x19, 0x84
-	.byte	0x51, 0x2b, 0x84
-	.byte	0
-	.ascii	"OAK"
-	.byte	0
-
-# WD Paradise.
-paradise_test:
-	leaw	idparadise, %si
-	movw	$0x7d, %di
-	movw	$0x04, %cx
-	repe
-	cmpsb
-	je	ispara
-	
-	xorw	%bp, %bp
-ispara:	ret
-
-idparadise:	.ascii	"VGA="
-
-paradise_md:
-	.byte	0x41, 0x22, 0x50
-	.byte	0x47, 0x1c, 0x84
-	.byte	0x55, 0x19, 0x84
-	.byte	0x54, 0x2c, 0x84
-	.byte	0
-	.ascii	"Paradise"
-	.byte	0
-
-# Trident.
-trident_test:
-	movw	$0x3c4, %dx
-	movb	$0x0e, %al
-	outb	%al, %dx
-	incw	%dx
-	inb	%dx, %al
-	xchgb	%al, %ah
-	xorb	%al, %al
-	outb	%al, %dx
-	inb	%dx, %al
-	xchgb	%ah, %al
-	movb	%al, %bl	# Strange thing ... in the book this wasn't
-	andb	$0x02, %bl	# necessary but it worked on my card which
-	jz	setb2		# is a trident. Without it the screen goes
-				# blurred ...
-	andb	$0xfd, %al
-	jmp	clrb2		
-
-setb2:	orb	$0x02, %al	
-clrb2:	outb	%al, %dx
-	andb	$0x0f, %ah
-	cmpb	$0x02, %ah
-	je	istrid
-
-	xorw	%bp, %bp
-istrid:	ret
-
-trident_md:
-	.byte	0x50, 0x1e, 0x50
-	.byte	0x51, 0x2b, 0x50
-	.byte	0x52, 0x3c, 0x50
-	.byte	0x57, 0x19, 0x84
-	.byte	0x58, 0x1e, 0x84
-	.byte	0x59, 0x2b, 0x84
-	.byte	0x5a, 0x3c, 0x84
-	.byte	0
-	.ascii	"Trident"
-	.byte	0
-
-# Tseng.
-tseng_test:
-	movw	$0x3cd, %dx
-	inb	%dx, %al	# Could things be this simple ! :-)
-	movb	%al, %bl
-	movb	$0x55, %al
-	outb	%al, %dx
-	inb	%dx, %al
-	movb	%al, %ah
-	movb	%bl, %al
-	outb	%al, %dx
-	cmpb	$0x55, %ah
- 	je	istsen
-
-isnot:	xorw	%bp, %bp
-istsen:	ret
-
-tseng_md:
-	.byte	0x26, 0x3c, 0x50
-	.byte	0x2a, 0x28, 0x64
-	.byte	0x23, 0x19, 0x84
-	.byte	0x24, 0x1c, 0x84
-	.byte	0x22, 0x2c, 0x84
-	.byte	0x21, 0x3c, 0x84
-	.byte	0
-	.ascii	"Tseng"
-	.byte	0
-
-# Video7.
-video7_test:
-	movw	$0x3cc, %dx
-	inb	%dx, %al
-	movw	$0x3b4, %dx
-	andb	$0x01, %al
-	jz	even7
-
-	movw	$0x3d4, %dx
-even7:	movb	$0x0c, %al
-	outb	%al, %dx
-	incw	%dx
-	inb	%dx, %al
-	movb	%al, %bl
-	movb	$0x55, %al
-	outb	%al, %dx
-	inb	%dx, %al
-	decw	%dx
-	movb	$0x1f, %al
-	outb	%al, %dx
-	incw	%dx
-	inb	%dx, %al
-	movb	%al, %bh
-	decw	%dx
-	movb	$0x0c, %al
-	outb	%al, %dx
-	incw	%dx
-	movb	%bl, %al
-	outb	%al, %dx
-	movb	$0x55, %al
-	xorb	$0xea, %al
-	cmpb	%bh, %al
-	jne	isnot
-	
-	movb	$VIDEO_FIRST_V7>>8, svga_prefix # Use special mode switching
-	ret
-
-video7_md:
-	.byte	0x40, 0x2b, 0x50
-	.byte	0x43, 0x3c, 0x50
-	.byte	0x44, 0x3c, 0x64
-	.byte	0x41, 0x19, 0x84
-	.byte	0x42, 0x2c, 0x84
-	.byte	0x45, 0x1c, 0x84
-	.byte	0
-	.ascii	"Video 7"
-	.byte	0
-
-# Realtek VGA
-realtek_test:
-	leaw	idrtvga, %si
-	movw	$0x45, %di
-	movw	$0x0b, %cx
-	repe
-	cmpsb
-	je	isrt
-	
-	xorw	%bp, %bp
-isrt:	ret
-
-idrtvga:	.ascii	"REALTEK VGA"
-
-realtek_md:
-	.byte	0x1a, 0x3c, 0x50
-	.byte	0x1b, 0x19, 0x84
-	.byte	0x1c, 0x1e, 0x84
-	.byte	0x1d, 0x2b, 0x84
-	.byte	0x1e, 0x3c, 0x84
-	.byte	0
-	.ascii	"REALTEK"
-	.byte	0
-
-#endif	/* CONFIG_VIDEO_SVGA */
-
-# User-defined local mode table (VGA only)
-#ifdef CONFIG_VIDEO_LOCAL
-local_modes:
-	leaw	local_mode_table, %si
-locm1:	lodsw
-	orw	%ax, %ax
-	jz	locm2
-	
-	stosw
-	movsw
-	jmp	locm1
-
-locm2:	ret
-
-# This is the table of local video modes which can be supplied manually
-# by the user. Each entry consists of mode ID (word) and dimensions
-# (byte for column count and another byte for row count). These modes
-# are placed before all SVGA and VESA modes and override them if table
-# compacting is enabled. The table must end with a zero word followed
-# by NUL-terminated video adapter name.
-local_mode_table:
-	.word	0x0100				# Example: 40x25
-	.byte	25,40
-	.word	0
-	.ascii	"Local"
-	.byte	0
-#endif	/* CONFIG_VIDEO_LOCAL */
-
-# Read a key and return the ASCII code in al, scan code in ah
-getkey:	xorb	%ah, %ah
-	int	$0x16
-	ret
-
-# Read a key with a timeout of 30 seconds.
-# The hardware clock is used to get the time.
-getkt:	call	gettime
-	addb	$30, %al			# Wait 30 seconds
-	cmpb	$60, %al
-	jl	lminute
-
-	subb	$60, %al
-lminute:
-	movb	%al, %cl
-again:	movb	$0x01, %ah
-	int	$0x16
-	jnz	getkey				# key pressed, so get it
-
-	call	gettime
-	cmpb	%cl, %al
-	jne	again
-
-	movb	$0x20, %al			# timeout, return `space'
-	ret
-
-# Flush the keyboard buffer
-flush:	movb	$0x01, %ah
-	int	$0x16
-	jz	empty
-	
-	xorb	%ah, %ah
-	int	$0x16
-	jmp	flush
-
-empty:	ret
-
-# Print hexadecimal number.
-prthw:	pushw	%ax
-	movb	%ah, %al
-	call	prthb
-	popw	%ax
-prthb:	pushw	%ax
-	shrb	$4, %al
-	call	prthn
-	popw	%ax
-	andb	$0x0f, %al
-prthn:	cmpb	$0x0a, %al
-	jc	prth1
-
-	addb	$0x07, %al
-prth1:	addb	$0x30, %al
-	jmp	prtchr
-
-# Print decimal number in al
-prtdec:	pushw	%ax
-	pushw	%cx
-	xorb	%ah, %ah
-	movb	$0x0a, %cl
-	idivb	%cl
-	cmpb	$0x09, %al
-	jbe	lt100
-
-	call	prtdec
-	jmp	skip10
-
-lt100:	addb	$0x30, %al
-	call	prtchr
-skip10:	movb	%ah, %al
-	addb	$0x30, %al
-	call	prtchr	
-	popw	%cx
-	popw	%ax
-	ret
-
-store_edid:
-#ifdef CONFIG_FIRMWARE_EDID
-	pushw	%es				# just save all registers
-	pushw	%ax
-	pushw	%bx
-	pushw   %cx
-	pushw	%dx
-	pushw   %di
-
-	pushw	%fs
-	popw    %es
-
-	movl	$0x13131313, %eax		# memset block with 0x13
-	movw    $32, %cx
-	movw	$0x140, %di
-	cld
-	rep
-	stosl
-
-	cmpw	$0x0200, vbe_version		# only do EDID on >= VBE2.0
-	jl	no_edid
-
-	pushw   %es				# save ES
-	xorw    %di, %di                        # Report Capability
-	pushw   %di
-	popw    %es                             # ES:DI must be 0:0
-	movw	$0x4f15, %ax
-	xorw	%bx, %bx
-	xorw	%cx, %cx
-	int	$0x10
-	popw    %es                             # restore ES
-
-	cmpb    $0x00, %ah                      # call successful
-	jne     no_edid
-
-	cmpb    $0x4f, %al                      # function supported
-	jne     no_edid
-
-	movw	$0x4f15, %ax                    # do VBE/DDC
-	movw	$0x01, %bx
-	movw	$0x00, %cx
-	movw    $0x00, %dx
-	movw	$0x140, %di
-	int	$0x10
-
-no_edid:
-	popw	%di				# restore all registers
-	popw	%dx
-	popw	%cx
-	popw	%bx
-	popw	%ax
-	popw	%es
-#endif
-	ret
-
-# VIDEO_SELECT-only variables
-mt_end:		.word	0	# End of video mode table if built
-edit_buf:	.space	6	# Line editor buffer
-card_name:	.word	0	# Pointer to adapter name
-scanning:	.byte	0	# Performing mode scan
-do_restore:	.byte	0	# Screen contents altered during mode change
-svga_prefix:	.byte	VIDEO_FIRST_BIOS>>8	# Default prefix for BIOS modes
-graphic_mode:	.byte	0	# Graphic mode with a linear frame buffer
-dac_size:	.byte	6	# DAC bit depth
-vbe_version:	.word	0	# VBE bios version
-
-# Status messages
-keymsg:		.ascii	"Press <RETURN> to see video modes available, "
-		.ascii	"<SPACE> to continue or wait 30 secs"
-		.byte	0x0d, 0x0a, 0
-
-listhdr:	.byte	0x0d, 0x0a
-		.ascii	"Mode:    COLSxROWS:"
-
-crlft:		.byte	0x0d, 0x0a, 0
-
-prompt:		.byte	0x0d, 0x0a
-		.asciz	"Enter mode number or `scan': "
-
-unknt:		.asciz	"Unknown mode ID. Try again."
-
-badmdt:		.ascii	"You passed an undefined mode number."
-		.byte	0x0d, 0x0a, 0
-
-vesaer:		.ascii	"Error: Scanning of VESA modes failed. Please "
-		.ascii	"report to <mj@ucw.cz>."
-		.byte	0x0d, 0x0a, 0
-
-old_name:	.asciz	"CGA/MDA/HGA"
-
-ega_name:	.asciz	"EGA"
-
-svga_name:	.ascii	" "
-
-vga_name:	.asciz	"VGA"
-
-vesa_name:	.asciz	"VESA"
-
-name_bann:	.asciz	"Video adapter: "
-#endif /* CONFIG_VIDEO_SELECT */
-
-# Other variables:
-adapter:	.byte	0	# Video adapter: 0=CGA/MDA/HGA,1=EGA,2=VGA
-video_segment:	.word	0xb800	# Video memory segment
-force_size:	.word	0	# Use this size instead of the one in BIOS vars