我在前一段時間寫了一個硬盤鎖，拿出來和大家交流交流，同時有個問題，希望大家能幫我想想。
首先，大略介紹一下我的程序，我是用匯編寫成，程序有2個文件：hdlock.exe
hdlock.dat ,其中hdlock.dat是我寫的用於裝入硬盤0柱0道1扇的硬盤鎖,hdlock.exe實現
（1）把hdlock.dat裝入硬盤0柱0道1扇並設置硬盤鎖的密碼，（2）修改密碼，（3）卸載硬盤鎖
在此，先介紹一下 hdlock.dat，因為硬盤鎖本身受空間限制，必須嚴格控制在1bdH字節內，（知道為什麼嗎？）所以是不能用masm先寫原程序，再編譯，我基本上是用debug的A命令一次性寫出來的，我把這些反匯編了出來，加上一些注釋，給大家看看，互相學習嗎。
;這一段是將整個硬盤鎖從0000:7c00移至0000:0600,以免被後來讀入的代碼覆蓋
0F6D:0100 1E PUSHDS
0F6D:0101 06 PUSHES
0F6D:0102 B90001 MOVCX,0100
0F6D:0105 BF0006 MOVDI,0600
0F6D:0108 B80000 MOVAX,0000
0F6D:010B 8ED8 MOVDS,AX
0F6D:010D 8EC0 MOVES,AX
0F6D:010F BE007C MOVSI,7C00
0F6D:0112 F2 REPNZ
0F6D:0113 A5 MOVSW
0F6D:0114 EA1A060000 JMP0000:061A ;長跳轉至移動後的代碼，也就是從011a處開始執行
0F6D:0119 90 NOP
0F6D:011A EB09 JMP0125
;這一段是對屏幕進行初始化,顯示字符串"PASSWORD"
0F6D:0125 B80006 MOVAX,0600
0F6D:0128 B7F0 MOVBH,F0
0F6D:012A B90000 MOVCX,0000
0F6D:012D BA4F18 MOVDX,184F
0F6D:0130 CD10 INT10 ;初始化屏幕(前景為黑色,背景為灰白,字符閃爍)
0F6D:0132 B21A MOVDL,1A
0F6D:0134 BE1C06 MOVSI,061C ;從061cH處顯示字符(因為程序將被讀入了0000:0600處，
;實際顯示的也就是現在的11cH處開始的字符串)
0F6D:0137 B402 MOVAH,02
0F6D:0139 B610 MOVDH,10
0F6D:013B B700 MOVBH,00
0F6D:013D CD10 INT10 ;設光標位置(10H行1aH列)
0F6D:013F 8A04 MOVAL,[SI]
0F6D:0141 3C00 CMPAL,00
0F6D:0143 741B JZ0160 ;是否已顯示完字符串,是則跳至從鍵盤讀取密碼處
0F6D:0145 B409 MOVAH,09
0F6D:0147 B90100 MOVCX,0001
0F6D:014A B700 MOVBH,00
0F6D:014C B370 MOVBL,70
0F6D:014E CD10 INT10 ;顯示一個字符
0F6D:0150 FEC2 INCDL ;光標後移一位
0F6D:0152 46 INCSI ;字符指針後移一位
0F6D:0153 EBE2 JMP0137 ;繼續顯示下一字符
0f6d:011c db 'PASSWARD'00 ;用於顯示的字符串
; 從鍵盤讀取密碼
0F6D:0160 B90400 MOVCX,0004
0F6D:0163 B80000 MOVAX,0000
0F6D:0166 8EC0 MOVES,AX
0F6D:0168 BF0108 MOVDI,0801
0F6D:016B F3 REPZ
0F6D:016C AB STOSW ;在0000:0801開始處開一片長度為8個字節的緩沖區
;(用00H來標記),用於存放從鍵盤讀入的密碼,(密碼
;最多為8個字符,最少為0個字符)
0F6D:016D B90900 MOVCX,0009 ;最多讀9次鍵盤(當然第9次是重頭讀過)
0F6D:0170 BF0108 MOVDI,0801 ;從801H處開始寫密碼
0F6D:0173 B223 MOVDL,23
0F6D:0175 B400 MOVAH,00
0F6D:0177 CD16 INT16 ;讀鍵盤
0F6D:0179 3C0D CMPAL,0D
0F6D:017B 7479 JZ01F6 ;是回車則跳至密碼比較處
0F6D:017F 90 NOP
0F6D:0180 90 NOP
0F6D:0181 B610 MOVDH,10
0F6D:0183 B700 MOVBH,00
0F6D:0185 CD10 INT10 ;設置光標位置(當然是"PASSWARD"字符串後面了)
0F6D:0187 3C08 CMPAL,08
0F6D:0189 7437 JZ01C2 ;是退格鍵則跳至退格處理
0F6D:018B 50 PUSHAX
0F6D:018C B40E MOVAH,0E
0F6D:018E B02A MOVAL,2A
0F6D:0190 B307 MOVBL,07
0F6D:0192 CD10 INT10 ;顯示一個"*"(沒有回顯的密碼輸入是不是很恐怖)
0F6D:0194 58 POPAX
0F6D:0195 0423 ADDAL,23 ;密碼字符加23H(受空間限制，加上該程序在系統啟
;動前執行，在此，我只是簡單的將密字加上23H，
;如果誰有好而小巧的算法，別忘了告訴我)
0F6D:0197 8805 MOV[DI],AL
0F6D:0199 47 INCDI
0F6D:019A 49 DECCX
0F6D:019B 83F900 CMPCX,+00
0F6D:019E 740A JZ01AA ;是否讀了第9次鍵盤,是跳轉至輸入溢出處
0F60:01A0 FEC2 INC DL
0F60:01A2 EBD1 JMP 0175
;本段用於處理鍵盤輸入超過8次
0F6D:01AA B610 MOVDH,10
0F6D:01AC B402 MOVAH,02
0F6D:01AE B223 MOVDL,23
0F6D:01B0 B700 MOVBH,00
0F6D:01B2 CD10 INT10
0F6D:01B4 B409 MOVAH,09
0F6D:01B6 B000 MOVAL,00
0F6D:01B8 B307 MOVBL,07
0F6D:01BA B90900 MOVCX,0009
0F6D:01BD CD10 INT10
0F6D:01BF EB9F JMP0160 ;重新讀取密碼
;本段用於退格處理
0F6D:01C2 51 PUSHCX
0F6D:01C3 B403 MOVAH,03
0F6D:01C5 B700 MOVBH,00
0F6D:01C7 CD10 INT10 ;讀光標位置
0F6D:01C9 80FA23 CMPDL,23
0F6D:01CC 74A7 JZ0175 ;光標是否已到頭,是則去讀下一密字
0F6D:01CE 81FF0008 CMPDI,0800
0F6D:01D2 74A1 JZ0175 ;密碼緩沖是否已到頭,是則去讀下一密字
0F6D:01D4 B402 MOVAH,02
0F6D:01D6 FECA DECDL
0F6D:01D8 CD10 INT10
0F6D:01DA B40E MOVAH,0E
0F6D:01DC B000 MOVAL,00
0F6D:01DE B307 MOVBL,07
0F6D:01E0 CD10 INT10 ;光標前移一位,並刪除一個"*"
0F6D:01E2 B80000 MOVAX,0000
0F6D:01E5 8905 MOV[DI],AX ;密碼緩沖當前指針處清零
0F6D:01E7 4F DECDI ;密碼緩沖指針減一
0F6D:01E8 8905 MOV[DI],AX ;密碼緩沖當前指針處清零
0F6D:01EA 59 POPCX
INC CX ;///CX 應該加1
0F6D:01EB EB88 JMP0175 ;重新讀鍵盤
;本段用於比較密字
0F6D:01F6 B80000 MOVAX,0000
0F6D:01F9 8EC0 MOVES,AX
0F6D:01FB 8ED8 MOVDS,AX
0F6D:01FD BEB007 MOVSI,07B0
0F6D:0200 BF0108 MOVDI,0801
0F6D:0203 B90400 MOVCX,0004
0F6D:0206 F3 REPZ
0F6D:0207 A7 CMPSW
0F6D:0208 7404 JZ020E ;字符串相同則跳轉至正確引導系統代碼
0F6D:020A EB3C JMP0248 ;字符串不相同則跳轉至加密硬盤代碼
;正確引導系統代碼
0F6D:020E B80000 MOVAX,0000
0F6D:0211 8EC0 MOVES,AX
0F6D:0213 B80102 MOVAX,0201
0F6D:0216 B90200 MOVCX,0002
0F6D:0219 BA8000 MOVDX,0080
0F6D:021C BB00F0 MOVBX,F000
0F6D:021F CD13 INT13
0F6D:0221 B80103 MOVAX,0301
0F6D:0224 B90100 MOVCX,0001
0F6D:0227 BA8000 MOVDX,0080
0F6D:022A CD13 INT13 ;0柱0道2扇是HDBOOT.EXE寫入的由硬盤鎖代碼
;(也就是大家現在看到的代碼)+正確的硬盤分
;區表組成,將其寫入0柱0道1扇後操作系統就可
;正常讀取硬盤了
0F6D:022C B80000 MOVAX,0000
0F6D:022F 8EC0 MOVES,AX
0F6D:0231 B80102 MOVAX,0201
0F6D:0234 B90300 MOVCX,0003
0F6D:0237 BA8000 MOVDX,0080
0F6D:023A BB007C MOVBX,7C00
0F6D:023D CD13 INT13 ;0柱0道3扇是HDBOOT.EXE寫入的原MBR區的備份,將
;其讀入0000:7c00處
0F6D:023F EA007C0000 JMP0000:7C00 ;長跳轉至原MBR代碼處執行(以後怎麼樣引導就不
;是我們現在討論的了),從而正確引導系統
;加密硬盤代碼
0F6D:0248 B80000 MOVAX,0000
0F6D:024B 8EC0 MOVES,AX
0F6D:024D B80102 MOVAX,0201
0F6D:0250 B90400 MOVCX,0004
0F6D:0253 BA8000 MOVDX,0080
0F6D:0256 BB00F0 MOVBX,F000
0F6D:0259 CD13 INT13
0F6D:025B B80103 MOVAX,0301
0F6D:025E B90100 MOVCX,0001
0F6D:0261 BA8000 MOVDX,0080
0F6D:0264 CD13 INT13 ;0柱0道4扇是HDBOOT.EXE寫入的由硬盤鎖代碼(也就是;大家現在看到的代碼)加上江明原理的邏輯鎖,將其寫入;0柱0道1扇後操作系統就被完全鎖死了(不能從其它盤引導)
0F6D:0266 CD19 INT19 ;不用多說吧,相當於熱啟動
大家看後一定看出了一些問題，為了能夠讓這個硬盤鎖可以跨平台，我設置為輸入正確密碼後就將
正確的分區表讀入0柱0道1扇，輸入不正確密碼後就將江明鎖讀入0柱0道1扇，明白人一下就看出了，如果電腦主人上次用正確密碼進入了電腦,而電腦非法使用者一次都不試密碼，就直接用軟盤或光盤或USB盤引導，那麼就可以非法訪問硬盤了，說實話，這個問題困擾了我許久，一直不得其解，不這樣做，就得在輸入正確密碼後就將正確的分區表讀入0柱0道1扇，然後在操作系統啟動後再做手腳把0柱0道1扇的分區表加密，這樣做有兩個問題，(1)操作系統啟動做的手腳一定是放在操作系統的自啟動中(如DOS的AUTOEXEC.BAT、WIN98的"啟動"等)，這樣做顯然不安全，(2)同時這樣做顯然不能做到"跨平台",所以我只能在程序說明中告訴使用者,如果離開電腦,就故意輸入一錯誤密碼,那麼江明鎖就將硬盤鎖死了,這樣電腦非法使用者用軟盤或光盤或USB盤都不能引導了,(大家知道所謂江明鎖,就是讓擴展分區指向自己,從而使啟動程序陷入死循環,這個該死的東西也不知害死了多少硬盤,也該讓他做做好事了),要是誰有更好的方法解決這一問題,一定要告訴我.
再來介紹一下HDLCOK.EXE文件，以下是完整的程序源代碼：
;硬盤鎖安裝程序
DATA SEGMENT
D1 DB 0CDH,0BFH,0D1H,0E5H,0EAH,0CDH
D2 DB 'You had not install the HDLOCK,do you install?(y/n)',0dh,0ah,'$'
D3 DB 'HDLOCK.DAT',00H
D4 DB 'Can not find file (HDLOCK.DAT)',0dh,0ah,'$'
D5 DB 'PASSWORD',00H
D6 DB 1EH,06H,0B9H,00H,01H,0BFH,00H,06H,0B8H,00H,00H,8EH,0D8H,8EH,0C0H,0BEH;邏輯鎖
DB 00H,7CH,0F2H,0A5H,0EAH,1AH,06H,00H,00H,90H,0EBH,09H,50H,41H,53H,53H
DB 57H,4FH,52H,44H,00H,0B8H,00H,06H,0B7H,0F0H,0B9H,00H,00H,0BAH,4FH,18H
DB 0CDH,10H,0B2H,01AH,0BEH,1CH,06H,0B4H,02H,0B6H,10H,0B7H,00H,0CDH,10H,8AH
DB 04H,3CH,00H,74H,1BH,0B4H,09H,0B9H,01H,00H,0B7H,00H,0B3H,70H,0CDH,10H
DB 0FEH,0C2H,46H,0EBH,0E2H,0CDH,20H,4FH,3DH,33H,0CDH,20H,33H,33H,33H,33H
DB 0B9H,04H,00H,0B8H,00H,00H,8EH,0C0H,0BFH,01H,08H,0F3H,0ABH,0B9H,09H,00H
DB 0BFH,01H,08H,0B2H,23H,0B4H,00H,0CDH,16H,3CH,0DH,74H,79H,0B4H,02H,90H
DB 90H,0B6H,10H,0B7H,00H,0CDH,10H,3CH,08H,74H,37H,50H,0B4H,0EH,0B0H,2AH
DB 0B3H,07H,0CDH,10H,58H,04H,23H,88H,05H,47H,49H,83H,0F9H,00H,74H,0AH
DB 0FEH,0C2H,0EBH,0D1H,24H,67H,00H,77H,69H,6EH,0B6H,10H,0B4H,02H,0B2H,23H
DB 0B7H,00H,0CDH,10H,0B4H,09H,0B0H,00H,0B3H,07H,0B9H,09H,00H,0CDH,10H,0EBH
DB 9FH,51H,51H,0B4H,03H,0B7H,00H,0CDH,10H,80H,0FAH,23H,74H,0A7H,81H,0FFH
DB 00H,08H,74H,0A1H,0B4H,02H,0FEH,0CAH,0CDH,10H,0B4H,0EH,0B0H,00H,0B3H,07H
DB 0CDH,10H,0B8H,00H,00H,89H,05H,4FH,89H,05H,59H,0EBH,88H,07H,43H,04H
DB 0E8H,86H,0CDH,20H,44H,44H,0B8H,00H,00H,8EH,0C0H,8EH,0D8H,0BEH,0B0H,07H
DB 0BFH,01H,08H,0B9H,04H,00H,0F3H,0A7H,74H,04H,0EBH,3CH,55H,55H,0B8H,00H
DB 00H,8EH,0C0H,0B8H,01H,02H,0B9H,02H,00H,0BAH,80H,00H,0BBH,00H,0F0H,0CDH
DB 13H,0B8H,01H,03H,0B9H,01H,00H,0BAH,80H,00H,0CDH,13H,0B8H,00H,00H,8EH
DB 0C0H,0B8H,01H,02H,0B9H,03H,00H,0BAH,80H,00H,0BBH,00H,7CH,0CDH,13H,0EAH
DB 00H,7CH,00H,00H,00H,00H,00H,00H,0B8H,00H,00H,8EH,0C0H,0B8H,01H,02H
DB 0B9H,04H,00H,0BAH,80H,00H,0BBH,00H,0F0H,0CDH,13H,0B8H,01H,03H,0B9H,01H
DB 00H,0BAH,80H,00H,0CDH,13H,0CDH,19H,00H,00H,00H,00H,00H,00H,00H,00H
DB 00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H
DB 00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H
DB 00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H
DB 00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H
DB 64H,64H,64H,64H,64H,64H,64H,64H,00H,00H,00H,00H,00H,00H,00H,00H
DB 01H,00H,05H,0FEH,7FH,05H,3FH,00H,00H,00H,47H,39H,40H,00H,00H,00H
DB 00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H
DB 00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H
DB 00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,55H,0AAH
D7 DB 'You have been installed HDLOCK,do you remove?(y/n)',0dh,'$'
D8 DB 'PASSWORD ERROR$'
D9 DB 0dh,0ah
DB 0dh,0ah
DB ' # # # # # # # # # # # # #',0dh,0ah
DB ' # # # # # # # # # # # # #',0dh,0ah
DB ' # # # # # # # # # # # # #',0dh,0ah
DB ' # # # # # # # # # # # # #',0dh,0ah
DB ' # # # # # # # # # # # # # #',0dh,0ah
DB 0dh,0ah
DB ' ----------# HARD DISK LOCK #------------',0dh,0ah
DB ' BY:THE MAN LIKE WIND',0dh,0ah
DB ' E-mail:[email protected]',0dh,0ah
DB ' OICQ:86633320',0dh,0ah
D10 DB 'Enter anykey to enter the PASSWORD.$'
D11 DB 'Enter anykey to enter the PASSWORD again.$'
D12 DB 'Error:Two PASSWORD is not alike!$'
D13 DB 'The HDLOCK had been installed,please remember you PASSWORD!!!$'
D14 DB 'The HDLOCK had been removed.$'
DATA ENDS
CODE SEGMENT
ASSUME CS:CODE,DS:DATA,ES:DATA
START:
MOV AX,DATA
MOV DS,AX
MOV ES,AX
MOV DX,OFFSET D9
MOV AH,09H
INT 21H
MOV AH,00H
INT 16H
;判斷是否安裝過硬盤鎖程序
NEXT:
MOV AX,0201H;讀一扇區
MOV CX,0001H
MOV DX,0080H
MOV BX,0F000H
INT 13H
MOV AX,0201H
MOV CX,0001H
MOV DX,0080H
MOV BX,0E000H
INT 13H
MOV SI,0F1A0H
MOV DI,OFFSET D1
MOV CX,0003H
REPE CMPSW
JNZ INSTALL
JMP DEL
INSTALL:
MOV DX,OFFSET D2
MOV AH,09H
INT 21H
ENTER:
INT 16H
OR AL,20H
CMP AL,'y';是Y?
JE INSTALL1
CMP AL,'n'
JE EXIT
JMP ENTER
EXIT:
MOV AH,4CH
INT 21H
INSTALL1:
MOV AH,3DH
MOV DX,OFFSET D3
MOV AL,00H
INT 21H
JB AERROR
PUSH AX
MOV AH,3FH
MOV DX,0F000H
MOV CX,01BEH
POP BX
INT 21H
MOV AH,09H
MOV DX,OFFSET D10
INT 21H
MOV AH,00H
INT 16H
CALL NEAR PTR PWENTER
MOV SI,0F1B0H
MOV DI,0F3B0H
MOV CX,0004H
REPNZ MOVSW
MOV AH,06H
MOV AL,00H
MOV BH,07H
MOV CX,0000H
MOV DX,184FH
INT 10H
MOV DH,03H
MOV DL,00H
MOV BH,00H
MOV AH,02H
INT 10H
MOV AH,09H
MOV DX,OFFSET D11
INT 21H
MOV AH,00H
INT 16H
CALL NEAR PTR PWENTER
MOV SI,0F1B0H
MOV DI,0F3B0H
MOV CX,0008H
REPE CMPSB
JNZ EXIT4
JMP WRITE
AERROR:
MOV AH,09H
MOV DX,OFFSET D4
INT 21H
JMP EXIT
EXIT4:
MOV DH,03H
MOV DL,00H
MOV BH,00H
MOV AH,02H
INT 10H
MOV AH,06H
MOV AL,00H
MOV BH,07H
MOV CX,0000H
MOV DX,184FH
INT 10H
MOV AH,09H
MOV DX,OFFSET D12
INT 21H
MOV AH,4CH
INT 21H
WRITE:
MOV AX,0301H
MOV CX,0003H
MOV DX,0080H
MOV BX,0E000H
INT 13H
MOV BX,OFFSET D6
ADD BX,1B0H
MOV CX,4H
MOV SI,0F1B0H
MOV DI,BX
REPNZ MOVSW
MOV AX,0301H
MOV CX,0004H
MOV DX,0080H
MOV BX,OFFSET D6
INT 13H
MOV AX,0301H
MOV CX,0002H
MOV BX,0F000H
MOV DX,0080H
INT 13H
MOV AX,0301H
MOV CX,0001H
MOV BX,0F000H
MOV DX,0080H
INT 13H
MOV AH,06H
MOV AL,00H
MOV BH,07H
MOV CX,0000H
MOV DX,184FH
INT 10H
MOV DH,03H
MOV DL,00H
MOV BH,00H
MOV AH,02H
INT 10H
MOV AH,09H
MOV DX,OFFSET D13
INT 21H
JMP EXIT
DEL:
MOV DX,OFFSET D7
MOV AH,09H
INT 21H
ENTER2:
MOV AH,00H
INT 16H
OR AL,20H
CMP AL,'y'
JE UNLADE
CMP AL,'n'
JE EXIT1
JMP ENTER2
EXIT1:
MOV AH,4CH
INT 21H
UNLADE:
CALL NEAR PTR PWENTER
MOV SI,0F1B0H
MOV DI,0E1B0H
MOV CX,8H
REPE CMPSB
JNZ EXIT2
MOV AX,0201H
MOV CX,0003H
MOV BX,0F000H
MOV DX,0080H
INT 13H
MOV AX,0301H
MOV CX,0001H
MOV BX,0F000H
MOV DX,0080H
INT 13H
MOV DH,03H
MOV DL,00H
MOV BH,00H
MOV AH,02H
INT 10H
MOV AH,06H
MOV AL,00H
MOV BH,07H
MOV CX,0000H
MOV DX,184FH
INT 10H
MOV AH,09H
MOV DX,OFFSET D14
INT 21H
JMP EXIT
EXIT2:
MOV AH,09H
MOV DX,OFFSET D8
INT 21H
MOV AH,4CH
INT 21H
;子程序用於從鍵盤讀密碼
PWENTER PROC NEAR
PUSH AX
PUSH BX
PUSH CX
PUSH DX
MOV AX,0600H
MOV BH,0F0H
MOV CX,0000H
MOV DX,184FH
INT 10H
MOV DL,1AH
MOV SI,OFFSET D5
DISPLAY:
MOV AH,02H
MOV DH,10H
MOV BH,00H
INT 10H
MOV AL,[SI]
CMP AL,00H
JE GETPW
MOV AH,09H
MOV CX,01H
MOV BH,00H
MOV BL,70H
INT 10H
INC DL
INC SI
JMP DISPLAY
GETPW:
MOV CX,0004H
MOV AH,0000H
MOV DI,0F1B0H
REPZ STOSW
MOV CX,0009H
MOV DI,0F1B0H
MOV DL,23H
READKEY:
MOV AH,00H
INT 16H
CMP AL,0DH
JE OK
CMP AL,20H
JE READKEY
CMP AL,00H
JE READKEY
CMP AL,09H
JE READKEY
CMP AL,1BH
JE AESC
PUSH CX
MOV AH,02H
MOV DH,10H
MOV BH,00H
INT 10H
POP CX
CMP AL,08H
JE BACKSPACE
PUSH AX
MOV AH,0EH
MOV AL,2AH
MOV BL,07H
INT 10H
POP AX
ADD AL,23H
MOV [DI],AL
INC DI
DEC CX
CMP CX,00H
JE OVERFLOW
INC DL
JMP READKEY
OK:
POP AX
POP BX
POP CX
POP DX
RET
AESC:
MOV AH,4CH
INT 21H
OVERFLOW:
MOV DH,10H
MOV AH,02H
MOV DL,23H
MOV BH,00H
INT 10H
MOV AH,09H
MOV AL,00H
MOV BL,07H
MOV CX,0009H
INT 10H
JMP GETPW
BACKSPACE:
PUSH CX
MOV AH,03H
MOV BH,00H
INT 10H
POP CX
CMP DL,23H
JE READKEY
CMP DI,0F1AFH;
JE READKEY
PUSH CX
MOV AH,02H
DEC DL
INT 10H
POP CX
PUSH CX
MOV AH,0EH
MOV AL,00H
MOV BL,07H
INT 10H
POP CX
MOV AX,0000H
MOV [DI],AX
DEC DI
MOV [DI],AX
CMP CX,09H
JE AJUMP
INC CX
JMP AJUMP
AJUMP:
JMP READKEY
PWENTER ENDP
CODE ENDS
END START
該程序用來將HDLOCK.DAT文件寫到MBR區,有興趣的朋友可以試試。
