To prevent viruses from invasion or other misuse of hard drives, backup hard disk boot records is an effective way. If there is no ready-made tool software (such as Srctools, a very good tool, you can download in the "Disk Tool" of this site, please refer to its article in the "DOS Article" section of this site), Can be implemented in DEBUG. Now introduce the method of backup and write hard disk main guidance records. The method of backup main boot record is: Debug (Enter) -a 100xxxx: 0100 MOV AX, 201xxxx: 0103 MOV BX, 200xxxx: 0106 MOV DX, 1xxxx: 0109 MOV DX, 80xxxx: 010c Int 13xxxx: 010e Int 3xxxx: 010f -G = 100-r CXCX 0001: 200-N Boot.zyd-W 200-Q Backup DOS partition boot record method is: Debug (Enter) -L 100 201-N Boot.dos-r CXCX 0001: 200- W 100-Q Write hard disk main boot record method is: Debug (Enter) -N boot.zyd-L 200-a 100xxxx: 0100 MOV AX, 301xxxx: 0103 MOV BX, 200xxxx: 0106 MOV CX, 1xxxx: 0109 MOV DX, 80xxxx: 010c INT 13XXXX: 010E INT 3XXXX: 010F-g = 100-Q Write DOS partition boot record method is: Debug (Enter) -N boot.dos-l 100-W 100 201-q This method is both It is very convenient and necessary to reflect the hard disk and not lost files.
