!
! setup.S
Copyright (C) 1991, 1992 Linus Torvalds
!
! setup.s is responsible
for getting the system data from the BIOS,
! and putting them into the
appropriate places in system memory.
! both setup.s and system has been
loaded by the bootblock.
!
! This code asks the bios for memory/disk/other
parameters, and
! puts them in a "safe" place: 0x90000-0x901FF, ie where
the
! boot-block used to be. It is then up to the protected mode
! system
to read them from there before the area is overwritten
! for
buffer-blocks.
!
! Move PS/2 aux init code to psaux.c
!
(troyer@saifr00.cfsat.Honeywell.COM) 03Oct92
!
! some changes and
additional features by Christoph Niemann, March 1993
!
(niemann@rubdv15.ETDV.Ruhr-Uni-Bochum.De)
!
! NOTE! These had better
be the same as in bootsect.s!
#include <linux/config.h>
#include
<linux/segment.h>
#ifndef SVGA_MODE
#define SVGA_MODE
ASK_VGA
#endif
INITSEG = DEF_INITSEG ! we move
boot here - out of the way
SYSSEG = DEF_SYSSEG
! system loaded at 0x10000 (65536).
SETUPSEG = DEF_SETUPSEG
! this is the current segment
.globl begtext, begdata, begbss,
endtext, enddata,
endbss
.text
begtext:
.data
begdata:
.bss
begbss:
.text
!
程序入口
entry start
start:
! ok, the read went well so we get current
cursor position and save it for
! posterity.
!
ok，读取正常，现在我们获取当前光标位置然后保存
! 设定ds段位置
mov ax,#INITSEG ! this is done in
bootsect already, but...
mov
ds,ax
! Get memory size (extended mem, kB)
!
获取内存
mov ah,#0x88
int 0x15
mov
[2],ax
! set the keyboard repeat rate to the max
!
设置键盘最大重复速率
mov
ax,#0x0305
xor bx,bx
! clear bx
int
0x16
! check for EGA/VGA and some config parameters
!
检测EGA/VGA并配置参数
mov
ah,#0x12
mov
bl,#0x10
int 0x10
mov [8],ax
mov
[10],bx
mov
[12],cx
mov
ax,#0x5019
cmp
bl,#0x10
je novga
mov ax,#0x1a00 ! Added check for
EGA/VGA discrimination
int
0x10
mov bx,ax
mov ax,#0x5019
cmp
bl,#0x1a ! 1a means VGA, anything else EGA or
lower
jne novga
call chsvga !
子函数，过程比较简单，但是读取的可能配置比较多
novga: mov
[14],ax
mov ah,#0x03
! read cursor pos
xor
bh,bh ! clear bh
int 0x10 ! save it
in known place, con_init fetches
mov
[0],dx ! it from
0x90000.
! Get video-card data:
!
获取显卡数据
mov
ah,#0x0f
int 0x10
mov [4],bx ! bh =
display page
mov [6],ax
! al = video mode, ah = window width
! Get hd0
data
! 获取第一个硬盘数据
xor
ax,ax ! clear ax
mov ds,ax
lds
si,[4*0x41]
mov
ax,#INITSEG
mov
es,ax
mov
di,#0x0080
mov
cx,#0x10
cld
rep
movsb
! Get hd1 data
!
获取第二个硬盘数据
xor ax,ax
! clear ax
mov
ds,ax
lds
si,[4*0x46]
mov
ax,#INITSEG
mov
es,ax
mov
di,#0x0090
mov
cx,#0x10
cld
rep
movsb
! Check that there IS a hd1
:-)
! 检测硬盘数量
mov
ax,#0x01500
mov
dl,#0x81
int 0x13
jc no_disk1
cmp
ah,#3
je
is_disk1
no_disk1:
! 没有第二块硬盘的处理
mov
ax,#INITSEG
mov
es,ax
mov
di,#0x0090
mov
cx,#0x10
xor ax,ax
! clear ax
cld
rep
stosb
is_disk1:
! check for PS/2
pointing device
! 检测PS/2设备，应该是鼠标
mov
ax,#INITSEG
mov
ds,ax
mov [0x1ff],#0
! default is no pointing device
int
0x11 ! int 0x11: equipment
determination
test al,#0x04
! check if pointing device installed
jz
no_psmouse
mov
[0x1ff],#0xaa ! device present
no_psmouse:
! now
we want to move to protected mode ...
! 准备进入保护模式
cli ! no
interrupts allowed !
mov
al,#0x80 ! disable NMI for the bootup
sequence
out #0x70,al
! first we
move the system to its rightful place
! 首先我们移动system到正确的位置
mov ax,#0x100 ! start of destination
segment
mov bx,#0x1000
! start of source segment
cld
! ‘direction‘=0, movs moves
forward
do_move:
! 上面是初始化，下面开始移动
mov es,ax
! destination segment
add ax,#0x100
cmp
ax,#0x9000
jz
end_move
mov ds,bx
! source segment
add
bx,#0x100
sub
di,di
sub si,si
mov cx,#0x800
rep
movsw
jmp do_move
! then we
load the segment descriptors
! 移动完毕，我们加载段描述符
end_move:
mov ax,#SETUPSEG ! right, forgot this
at first. didn‘t work :-)
mov
ds,ax
! 加载idt
lidt
idt_48 ! load idt with 0,0
! 加载gdt
lgdt
gdt_48 ! load gdt with whatever
appropriate
! that was painless, now we enable A20
!
设置完毕，我们现在准备打开A20地址线
call
empty_8042
mov
al,#0xD1 ! command
write
out #0x64,al
call empty_8042
mov
al,#0xDF ! A20 on
out #0x60,al
call
empty_8042
! make sure any possible coprocessor is properly
reset..
! 确保处理器正确设置
xor
ax,ax
out #0xf0,al
call delay
out
#0xf1,al
call delay
! well,
that went ok, I hope. Now we have to reprogram the interrupts :-(
! we put
them right after the intel-reserved hardware interrupts, at
! int 0x20-0x2F.
There they won‘t mess up anything. Sadly IBM really
! messed this up with the
original PC, and they haven‘t been able to
! rectify it afterwards. Thus the
bios puts interrupts at 0x08-0x0f,
! which is used for the internal hardware
interrupts as well. We just
! have to reprogram the 8259‘s, and it isn‘t
fun.
! 重新设置中断
mov
al,#0x11 ! initialization
sequence
out #0x20,al
! send it to 8259A-1
call delay
out
#0xA0,al ! and to
8259A-2
call delay
mov al,#0x20 !
start of hardware int‘s (0x20)
out
#0x21,al
call
delay
mov al,#0x28
! start of hardware int‘s 2 (0x28)
out #0xA1,al
call
delay
mov al,#0x04
! 8259-1 is master
out #0x21,al
call
delay
mov al,#0x02
! 8259-2 is slave
out
#0xA1,al
call
delay
mov al,#0x01
! 8086 mode for both
out #0x21,al
call
delay
out #0xA1,al
call delay
mov
al,#0xFF ! mask off all interrupts
for now
out #0xA1,al
call delay
mov
al,#0xFB ! mask all irq‘s but irq2
which
out #0x21,al
! is cascaded
! well, that certainly wasn‘t fun
:-(. Hopefully it works, and we don‘t
! need no steenking BIOS anyway (except
for the initial loading :-).
! The BIOS-routine wants lots of unnecessary
data, and it‘s less
! "interesting" anyway. This is how REAL programmers do
it.
!
! Well, now‘s the time to actually move into protected mode. To
make
! things as simple as possible, we do no register set-up or
anything,
! we let the gnu-compiled 32-bit programs do that. We just jump
to
! absolute address 0x00000, in 32-bit protected mode.
!
! Note that
the short jump isn‘t strictly needed, althought there are
! reasons why it
might be a good idea. It won‘t hurt in any case.
!
!
打开地址线，进入保护模式
mov ax,#0x0001
! protected mode (PE) bit
lmsw
ax ! This is it!
jmp flush_instr
flush_instr:
jmpi 0x1000,KERNEL_CS ! jmp offset
1000 of segment 0x10 (cs)
!
跳转到cs段的偏移为0x1000处执行，即执行zBoot/head.s
! This routine checks that the
keyboard command queue is empty
! (after emptying the output
buffers)
!
! No timeout is used - if this hangs there is something wrong
with
! the machine, and we probably couldn‘t proceed
anyway.
empty_8042:
call
delay
in al,#0x64
! 8042 status port
test
al,#1 ! output
buffer?
jz no_output
call delay
in
al,#0x60 ! read it
jmp
empty_8042
no_output:
test
al,#2 ! is input buffer
full?
jnz empty_8042 !
yes - loop
ret
!
! Read a key and return the
(US-)ascii code in al, scan code in ah
!
getkey:
xor ah,ah
int
0x16
ret
!
! Read a key with a timeout of
30 seconds. The cmos clock is used to get
! the
time.
!
getkt:
call
gettime
add al,#30
! wait 30 seconds
cmp
al,#60
jl lminute
sub al,#60
lminute:
mov cl,al
again: mov
ah,#0x01
int 0x16
jnz getkey ! key
pressed, so get it
call
gettime
cmp al,cl
jne again
mov
al,#0x20 ! timeout, return default char
`space‘
ret
!
! Flush the keyboard
buffer
!
flush: mov
ah,#0x01
int 0x16
jz empty
xor
ah,ah
int 0x16
jmp flush
empty: ret
!
!
Read the cmos clock. Return the seconds in al
!
gettime:
push cx
mov
ah,#0x02
int 0x1a
mov al,dh
! dh contains the seconds
and al,#0x0f
mov
ah,dh
mov cl,#0x04
shr ah,cl
aad
pop cx
ret
!
! Delay is
needed after doing i/o
!
delay:
.word
0x00eb ! jmp
$+2
ret
! Routine trying to recognize type of
SVGA-board present (if any)
! and if it recognize one gives the choices of
resolution it offers.
! If one is found the resolution chosen is given by
al,ah (rows,cols).
chsvga: cld
push ds
push
cs
mov ax,[0x01fa]
pop ds
mov
modesave,ax
mov
ax,#0xc000
mov
es,ax
mov
ax,modesave
cmp
ax,#NORMAL_VGA
je
defvga
cmp
ax,#EXTENDED_VGA
je
vga50
cmp
ax,#ASK_VGA
jne
svga
lea si,msg1
call prtstr
call
flush
nokey: call
getkt
cmp al,#0x0d
! enter ?
je
svga ! yes - svga
selection
cmp al,#0x20
! space ?
je
defvga ! no -
repeat
call beep
jmp nokey
defvga: mov
ax,#0x5019
pop ds
ret
/* extended vga mode: 80x50 */
vga50:
mov ax,#0x1112
xor
bl,bl
int 0x10
! use 8x8 font set (50 lines on VGA)
mov ax,#0x1200
mov
bl,#0x20
int 0x10
! use alternate print screen
mov ax,#0x1201
mov
bl,#0x34
int 0x10
! turn off cursor emulation
mov ah,#0x01
mov
cx,#0x0607
int 0x10
! turn on cursor (scan lines 6 to 7)
pop ds
mov
ax,#0x5032 ! return 80x50
ret
/* extended vga mode: 80x28 */
vga28:
pop ax ! clean the
stack
mov ax,#0x1111
xor bl,bl
int
0x10 ! use 9x14 fontset (28 lines on
VGA)
mov ah, #0x01
mov cx,#0x0b0c
int
0x10 ! turn on cursor (scan lines 11
to 12)
pop ds
mov ax,#0x501c ! return
80x28
ret
/* svga modes */
svga:
cld
lea
si,id9GXE ! Check for the #9GXE
(jyanowit@orixa.mtholyoke.edu,thanks
dlm40629@uxa.cso.uiuc.edu)
mov di,#0x49 ! id string is at
c000:049
mov cx,#0x11 ! length of "Graphics
Power By"
repe
cmpsb
jne
of1280
is9GXE: lea
si,dsc9GXE ! table of descriptions of video modes for
BIOS
lea di,mo9GXE !
table of sizes of video modes for my BIOS
br
selmod ! go ask for video
mode
of1280: cld
lea si,idf1280 ! Check for Orchid
F1280 (dingbat@diku.dk)
mov
di,#0x10a ! id string is at c000:010a
mov cx,#0x21 ! length
repe
cmpsb
jne
nf1280
isVRAM: lea
si,dscf1280
lea
di,mof1280
br
selmod
nf1280: lea
si,idVRAM
mov
di,#0x10a
mov
cx,#0x0c
repe
cmpsb
je isVRAM
cld
lea si,idati
! Check ATI ‘clues‘
mov di,#0x31
mov
cx,#0x09
repe
cmpsb
jne noati
lea si,dscati
lea
di,moati
br
selmod
noati: mov
ax,#0x200f ! Check Ahead
‘clues‘
mov dx,#0x3ce
out dx,ax
inc
dx
in al,dx
cmp al,#0x20
je
isahed
cmp
al,#0x21
jne
noahed
isahed: lea
si,dscahead
lea
di,moahead
br
selmod
noahed: mov
dx,#0x3c3 ! Check Chips & Tech.
‘clues‘
in al,dx
or al,#0x10
out
dx,al
mov dx,#0x104
in
al,dx
mov bl,al
mov dx,#0x3c3
in
al,dx
and al,#0xef
out dx,al
cmp
bl,[idcandt]
jne
nocant
lea
si,dsccandt
lea
di,mocandt
br
selmod
nocant: mov
dx,#0x3d4 ! Check Cirrus
‘clues‘
mov al,#0x0c
out dx,al
inc
dx
in al,dx
mov bl,al
xor
al,al
out dx,al
dec dx
mov
al,#0x1f
out dx,al
inc dx
in
al,dx
mov bh,al
xor ah,ah
shl
al,#4
mov cx,ax
mov al,bh
shr
al,#4
add cx,ax
shl cx,#8
add
cx,#6
mov ax,cx
mov dx,#0x3c4
out
dx,ax
inc dx
in al,dx
and
al,al
jnz nocirr
mov al,bh
out
dx,al
in al,dx
cmp al,#0x01
jne
nocirr
call rst3d4
lea si,dsccirrus
lea di,mocirrus
br
selmod
rst3d4: mov
dx,#0x3d4
mov
al,bl
xor ah,ah
shl ax,#8
add
ax,#0x0c
out dx,ax
ret
nocirr: call
rst3d4 ! Check
Everex ‘clues‘
mov
ax,#0x7000
xor
bx,bx
int 0x10
cmp al,#0x70
jne
noevrx
shr dx,#4
cmp dx,#0x678
je
istrid
cmp
dx,#0x236
je
istrid
lea
si,dsceverex
lea
di,moeverex
br
selmod
istrid: lea
cx,ev2tri
jmp
cx
noevrx: lea
si,idgenoa ! Check Genoa
‘clues‘
xor ax,ax
seg es
mov
al,[0x37]
mov
di,ax
mov cx,#0x04
dec si
dec
di
l1: inc si
inc di
mov
al,(si)
test al,al
jz l2
seg es
cmp al,(di)
l2: loope
l1
cmp cx,#0x00
jne nogen
lea
si,dscgenoa
lea
di,mogenoa
br
selmod
nogen: cld
lea si,idoakvga
mov
di,#0x08
mov
cx,#0x08
repe
cmpsb
jne nooak
lea si,dscoakvga
lea
di,mooakvga
br
selmod
nooak: cld
lea si,idparadise !
Check Paradise ‘clues‘
mov
di,#0x7d
mov
cx,#0x04
repe
cmpsb
jne nopara
lea si,dscparadise
lea
di,moparadise
br
selmod
nopara: mov
dx,#0x3c4 ! Check Trident
‘clues‘
mov al,#0x0e
out dx,al
inc
dx
in al,dx
xchg ah,al
xor
al,al
out dx,al
in al,dx
xchg
al,ah
mov bl,al
! Strange thing ... in the book this
wasn‘t
and bl,#0x02 !
necessary but it worked on my card which
jz
setb2 ! is a trident. Without it the
screen goes
and al,#0xfd
! blurred ...
jmp
clrb2 !
setb2:
or al,#0x02 !
clrb2:
out dx,al
and
ah,#0x0f
cmp
ah,#0x02
jne
notrid
ev2tri: lea
si,dsctrident
lea
di,motrident
jmp
selmod
notrid: mov
dx,#0x3cd ! Check Tseng
‘clues‘
in al,dx
! Could things be this simple !
:-)
mov bl,al
mov al,#0x55
out
dx,al
in al,dx
mov ah,al
mov
al,bl
out dx,al
cmp ah,#0x55
jne
notsen
lea
si,dsctseng
lea
di,motseng
jmp
selmod
notsen: mov
dx,#0x3cc ! Check Video7
‘clues‘
in al,dx
mov dx,#0x3b4
and
al,#0x01
jz even7
mov dx,#0x3d4
even7:
mov al,#0x0c
out
dx,al
inc dx
in al,dx
mov
bl,al
mov al,#0x55
out dx,al
in
al,dx
dec dx
mov al,#0x1f
out
dx,al
inc dx
in al,dx
mov
bh,al
dec dx
mov al,#0x0c
out
dx,al
inc dx
mov al,bl
out
dx,al
mov al,#0x55
xor al,#0xea
cmp
al,bh
jne novid7
lea si,dscvideo7
lea
di,movideo7
jmp
selmod
novid7: lea
si,dsunknown
lea
di,mounknown
selmod: xor
cx,cx
mov cl,(di)
mov ax,modesave
cmp
ax,#ASK_VGA
je
askmod
cmp
ax,#NORMAL_VGA
je
askmod
cmp al,cl
jl gotmode
push
si
lea si,msg4
call prtstr
pop
si
askmod: push si
lea si,msg2
call
prtstr
pop si
push si
push
cx
tbl: pop bx
push bx
mov
al,bl
sub al,cl
call modepr
lodsw
xchg al,ah
call
dprnt
xchg ah,al
push ax
mov
al,#0x78
call
prnt1
pop ax
call dprnt
push
si
lea si,crlf
! print CR+LF
call
prtstr
pop si
loop tbl
pop
cx
lea si,msg3
call prtstr
pop
si
add cl,#0x30
jmp nonum
nonumb: call
beep
nonum: call
getkey
cmp al,#0x30
! ascii `0‘
jb
nonumb
cmp al,#0x3a
! ascii `9‘
jbe
number
cmp al,#0x61
! ascii `a‘
jb
nonumb
cmp al,#0x7a
! ascii `z‘
ja
nonumb
sub
al,#0x27
cmp al,cl
jae nonumb
sub
al,#0x30
jmp gotmode
number:
cmp al,cl
jae
nonumb
sub
al,#0x30
gotmode: xor
ah,ah
or al,al
beq vga50
push
ax
dec ax
beq vga28
add
di,ax
mov al,(di)
int 0x10
pop
ax
shl ax,#1
add si,ax
lodsw
pop ds
ret
! Routine to
print asciiz-string at DS:SI
prtstr:
lodsb
and al,al
jz fin
call
prnt1
jmp
prtstr
fin: ret
! Routine to print a decimal
value on screen, the value to be
! printed is put in al (i.e 0-255).
dprnt: push ax
push cx
xor
ah,ah ! Clear ah
mov cl,#0x0a
idiv
cl
cmp al,#0x09
jbe lt100
call
dprnt
jmp
skip10
lt100: add
al,#0x30
call
prnt1
skip10: mov
al,ah
add al,#0x30
call prnt1
pop cx
pop
ax
ret
!
! Routine to print the mode
number key on screen. Mode numbers
! 0-9 print the ascii values `0‘ to ‘9‘,
10-35 are represented by
! the letters `a‘ to `z‘. This routine prints some
spaces around the
! mode no.
!
modepr:
push ax
cmp
al,#0x0a
jb digit
! Here is no check for number > 35
add al,#0x27
digit: add
al,#0x30
mov modenr,
al
push si
lea si, modestring
call prtstr
pop
si
pop ax
ret
! Part of above routine, this one just prints ascii
al
prnt1: push ax
push cx
xor
bh,bh
mov cx,#0x01
mov ah,#0x0e
int
0x10
pop cx
pop ax
ret
beep: mov
al,#0x07
jmp prnt1
gdt:
.word 0,0,0,0
! dummy
.word
0,0,0,0 ! unused
.word 0x07FF ! 8Mb
- limit=2047 (2048*4096=8Mb)
.word
0x0000 ! base
address=0
.word 0x9A00
! code read/exec
.word 0x00C0 !
granularity=4096, 386
.word
0x07FF ! 8Mb - limit=2047
(2048*4096=8Mb)
.word 0x0000
! base address=0
.word 0x9200 ! data
read/write
.word 0x00C0
! granularity=4096, 386
idt_48:
.word 0
! idt limit=0
.word
0,0 ! idt
base=0L
gdt_48:
.word
0x800 ! gdt limit=2048, 256 GDT
entries
.word 512+gdt,0x9
! gdt base = 0X9xxxx
msg1:
.ascii "Press <RETURN> to see SVGA-modes
available, <SPACE> to continue or wait 30 secs."
db 0x0d, 0x0a, 0x0a,
0x00
msg2: .ascii
"Mode: COLSxROWS:"
db 0x0d, 0x0a, 0x0a, 0x00
msg3:
db 0x0d, 0x0a
.ascii "Choose mode by pressing the
corresponding number or letter."
crlf:
db 0x0d, 0x0a, 0x00
msg4:
.ascii "You passed an undefined mode
number to setup. Please choose a new mode."
db 0x0d, 0x0a, 0x0a, 0x07,
0x00
modestring: .ascii "
"
modenr: db
0x00 ! mode number
.ascii ": "
db 0x00
idati:
.ascii "761295520"
idcandt:
.byte 0xa5
idgenoa:
.byte 0x77, 0x00, 0x99, 0x66
idparadise:
.ascii "VGA="
idoakvga:
.ascii "OAK VGA "
idf1280: .ascii
"Orchid Technology Fahrenheit 1280"
id9GXE:
.ascii "Graphics Power By"
idVRAM:
.ascii "Stealth VRAM"
!
Manufacturer: Numofmodes+2:
Mode:
! Number of modes is the number of chip-specific svga modes plus
the extended
! modes available on any vga (currently
2)
moati: .byte
0x04, 0x23, 0x33
moahead:
.byte 0x07, 0x22, 0x23, 0x24, 0x2f,
0x34
mocandt: .byte 0x04,
0x60, 0x61
mocirrus: .byte
0x06, 0x1f, 0x20, 0x22, 0x31
moeverex:
.byte 0x0c, 0x03, 0x04, 0x07, 0x08,
0x0a, 0x0b, 0x16, 0x18, 0x21, 0x40
mogenoa:
.byte 0x0c, 0x58, 0x5a, 0x60, 0x61,
0x62, 0x63, 0x64, 0x72, 0x74, 0x78
moparadise:
.byte 0x04, 0x55,
0x54
motrident: .byte 0x09,
0x50, 0x51, 0x52, 0x57, 0x58, 0x59, 0x5a
motseng:
.byte 0x07, 0x26, 0x2a, 0x23, 0x24,
0x22
movideo7: .byte 0x08,
0x40, 0x43, 0x44, 0x41, 0x42, 0x45
mooakvga:
.byte 0x08, 0x00, 0x07, 0x4e, 0x4f, 0x50,
0x51
mo9GXE: .byte
0x04, 0x54, 0x55
mof1280:
.byte 0x04, 0x54,
0x55
mounknown: .byte
0x02
! msb
= Cols lsb = Rows:
! The first two modes are standard vga modes available on
any vga.
! mode 0 is 80x50 and mode 1 is 80x28
dscati:
.word 0x5032, 0x501c, 0x8419,
0x842c
dscahead: .word 0x5032, 0x501c,
0x842c, 0x8419, 0x841c, 0xa032, 0x5042
dsccandt:
.word 0x5032, 0x501c, 0x8419,
0x8432
dsccirrus: .word 0x5032, 0x501c,
0x8419, 0x842c, 0x841e, 0x6425
dsceverex: .word
0x5032, 0x501c, 0x5022, 0x503c, 0x642b, 0x644b, 0x8419, 0x842c, 0x501e,
0x641b, 0xa040, 0x841e
dscgenoa: .word
0x5032, 0x501c, 0x5020, 0x642a, 0x8419, 0x841d, 0x8420, 0x842c, 0x843c,
0x503c, 0x5042, 0x644b
dscparadise: .word
0x5032, 0x501c, 0x8419, 0x842b
dsctrident: .word
0x5032, 0x501c, 0x501e, 0x502b, 0x503c, 0x8419, 0x841e,
0x842b, 0x843c
dsctseng: .word 0x5032,
0x501c, 0x503c, 0x6428, 0x8419, 0x841c, 0x842c
dscvideo7:
.word 0x5032, 0x501c, 0x502b, 0x503c, 0x643c, 0x8419,
0x842c, 0x841c
dscoakvga: .word 0x5032, 0x501c,
0x2819, 0x5019, 0x503c, 0x843c, 0x8419, 0x842b
dscf1280:
.word 0x5032, 0x501c, 0x842b,
0x8419
dsc9GXE: .word 0x5032, 0x501c,
0x842b, 0x8419
dsunknown: .word 0x5032,
0x501c
modesave: .word
SVGA_MODE
.text
endtext:
.data
enddata:
.bss
endbss:
原文：http://www.cnblogs.com/xiaofengwei/p/3741625.html