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- NU (Norton Utilities Main Program)
-
-
- Description: Runs a full-screen menu utility that displays information
- about a disk, lets you scan and edit information on a disk,
- and recovers deleted files and lost data.
-
-
- Syntax: Version 3.0: NU [(drive:)(] [/D0 | /D1 | /D2] [/NOCOLOR |
- /TV]
-
- Version 3.1: NU [(drive:)] [/D0 | /D1 | /D2] [[[/F(n)]
- [/B(n)]] | /NOC | /TV] [/EBCDIC] [/EUR] [/P]
-
- Version 4.0: NU [(drive:)][(path)][(filespec)] [/D0 | /D1 |
- /D2] [[[/F(n)] [/B(n)]] | /BW| /TV] [/EBCDIC]
- [/EXT] [M] [/P] [/x:(drvltrs)]
-
- Version 4.5: NU [(drive:)][(path)][(filespec)] [/D0 | /D1]
- [/BW] [/EBCDIC] [/M] [/NOSNOW] [/P] [/WS]
- [/x:(drvltrs)]
-
- Parameters:
-
- (drive:) The single-letter specifier (A:, B:, C:, etc.) for the drive
- you want to process. Follow the letter with a colon. The
- current drive is the default.
-
- (path) The full name (C:\WP\LETTERS) of the directory that NU
- initially selects for further processing. The current
- directory is the default.
-
- (filespec) The name of the file you want to display. If the (filespec)
- you supply does not exist, no data is displayed. The default
- (filespec) is ..
-
- /B(n) Specifies the background color for the menu system. Use an
- integer from 0 through 15 to specify the color. Within the
- menu system, you can increment (n) by pressing F3. In version
- 3.1, you can specify identical foreground and background
- colors, but much of the information on the screen will be
- unreadable. In version 4.0, if you attempt to specify
- identical foreground and background colors, NU adds one to the
- foreground color number before beginning execution. Avoid
- using the high-intensity shade of a color for the foreground
- with the normal-intensity shade of the same color for the
- background (for example, /F12 bright red and /B4 red). The
- default is /B1 (blue). See <NUCOLOR>.
-
- /BW Specifies a black-and-white display in versions 4.0 and 4.5.
- Within the menu system, you can use F1 to toggle this switch.
-
- /D0 Requests the standard screen driver (the default) for a fully
- IBM-compatible computer system.
-
- /D1 Requests the screen driver for a BIOS-compatible computer
- system.
-
- /D2 Requests the ANSI.SYS driver for a non-IBM- compatible
- computer system.
-
- /EBCDIC Displays characters using the Extended Binary Coded Decimal
- Interchange Code rather than ASCII. Within the menu system,
- you can use Alt-F5 to toggle this switch.
-
- /EUR In version 3.1, specifies the European character set and
- displays character codes 128 through 255 without alteration.
- The default is to remove the high-order bit from all
- characters to restrict the characters displayed to the codes 0
- through 127. Within the menu system, you can use Alt-F6 to
- toggle this switch.
-
- /EXT In version 4.0, specifies the extended character set and
- displays all characters without modification. If you do not
- use this switch, NU removes the high-order bit from all
- characters to restrict the characters displayed to the codes 0
- through 127. Within the menu system, you can use Alt-F6 to
- toggle this switch.
-
- /F(n) Specifies the foreground color for the menu system. Use an
- integer from 0 through 15 to specify the color. In the menu
- system, you can press F4 to add one to the value of (n). The
- default is /F15 (bright white). See <NUCOLOR>.
-
- /M (Advanced Edition only.) Sets maintenance mode to allow NU to
- bypass the MS-DOS logical structure. Use this switch if you
- are working with a badly damaged disk.
-
- /NOC Specifies a black-and-white display in versions 3.0 and 3.1.
- Within the menu system, you can use F1 to toggle this switch.
-
- /NOSNOW Prevents screen flicker if your system has an older CGA card.
-
- /P Suppresses display of nonprintable characters. Within the menu
- system, you can use Alt-F2 to toggle this switch.
-
-
-
-
-
-
-
- /TV Indicates that the utility is running under either TopView or
- Microsoft Windows.
-
- /WS Sets WordStar character display mode. Removes the high-order
- bit from all characters to restrict the range of display
- characters to codes 0 through 127. The default in version 4.5
- is to display all character codes without alteration. Within
- the menu system, you can use Alt-F6 to toggle this switch.
-
- /X:(drvltrs) (Advanced Edition only.) Excludes specified drives from
- absolute sector processing. Some manufacturers' versions of
- MS-DOS allocate drive letters to disk drives that do not
- exist; use this switch to inform NU that these drive letters
- are invalid.
-
-
-
-
- Notes:
-
- In versions 4.0 and 4.5, the main menu of NU provides you with three options:
- You can choose:
-
- 1. Explore disk to explore and change data on your
- disk<NUNUG01><NUNUG02><NUNUG03><NUNUG04><NUNUG05><NUNUG06>.
-
- 2. UnErase to execute the UnErase file subsystem<NUNUG09>.
-
- 3. Disk information to display information about any of your disk
- drives <NUNUG10><NUNUG12>.
-
- In versions 3.0 and 3.1, the options on the main menu let you select a
- drive<NUNUG07>, file, disk directory, or disk sector, and they let you either
- explore and change data <NUNUG08>on your disk or execute the unerase file
- submenus. In versions 4.0 and later, selecting a drive, file, disk directory,
- or disk sector is a subfunction of explore.
-
- In all versions, you can use the explore functions to search files,
- directories, or sectors for specific information, to display information
- about items you have selected <NUNUG11>. and to display data that is on your
- disk in Hex, Text, or Directory format. When your data is displayed in Hex
- format, you can modify it and request NU to write it back to disk.
-
- If you are using the Advanced Edition of either version 4.0 or version 4.5,
- you can change your data when it is in Directory format display mode, you can
- edit and change the File Allocation Table (FAT) and the Partition Table, and
- you can scan the disk by absolute cluster address.
-
- ╔══════════════════════════════════════════════════════════════════════════╗
- ║ *!* Caution *!* ║
- ║ ║
- ║ If you indiscriminately make changes to data in the directories, in the ║
- ║ File Allocation Table (FAT), in the Partition Table, or in the Boot ║
- ║ Record, you can lose data or render your disk unusable. ║
- ║ ║
- ╚══════════════════════════════════════════════════════════════════════════╝
-
- In all versions, you can use the Unerase submenus to select the directory you
- want to search for missing file entries, to pick a found entry for an erased
- file, to examine the data in the clusters that were occupied by the deleted
- file, and to restore the filename and the space it occupied.
-
- MS-DOS does not actually erase a deleted file; instead, it changes the first
- character of the file's name in the directory to a question (?) mark and
- makes the FAT entry allocated to that file as available.
-
-
-
-
-
-
-
-
-
-
-
-
- You can manually add specific clusters to a deleted file. In versions 4.0 and
- 4.5, you can also create a new file directory entry if the original file
- directory entry has been overwritten, and you can easily add, reorder, and
- delete clusters associated with a particular file.
-
- See <NUDI>, <NUFR>, <NUNCD>, <NUQU>, <NUSF>, <NUTS>, <NUUD>.
-
-