APPENDIX A -- What's New! DoubleTake Professional Version 2.0 1. ASCII Mode. The most significant improvement in DoubleTake Professional, Version 2.0, is the implementation of a fully functional ASCII viewing mode. 2. Common features. In Version 2.0, ASCII Mode and Hex mode share many features: Fully scrollable forward or backward, any length file. Cursor movement keys can move each file line by line or character by character. Can move a "cursor" (or pointer) character by character in each file. Double Scroll Mode -- Scroll Lock toggles whether both file character cursors move together when you press the Right/Left arrows. Starts with Double Scroll Mode On. Find String highlights the found string (in case you want to save the block to a clip file.) Find String, Find Next Mismatch and Align Files remain at the current spot in the file if you do not find a string, mismatch or a spot to align in a file. Added ability to enter Hex or Decimal codes when searching for a string. (to search for non-printing characters, such as CR or LF or TAB). Use no quotes if entering just a string. Use quotes if you want to mix hex ($20 =space character, for example) and decimal (\032=space character) along with the strings. DoubleTake provides a configurable Align Files function. Pressing [Alt-A] lets you choose: 1) which file to align with which, 2) how much of the "Align-with" file to search for in the "bring- into-alignment" file, 3) which way to search for in the "bring-into-alignment" file, 4) how many characters to check in the "bring-into- alignment" file and 5) whether to ignore upper/lower case in the search. If Blank Ignore is on, all "IGNORE" characters are ignored in finding a match. DoubleTake has a single-key auto-align function to try to re-align the files after you've found a mismatch. Just press [A] and DoubleTake will search both forward and backward for a match according to the parameters you've set for how far to search and how long a string to match. The key to toggle between Hex and ASCII has been changed from [X] to [Alt-X]. The key to toggle between Hex 24-column and 80-column modes was changed from [Alt-X] to [X]. This makes it a bit more difficult to change modes, to minimize accidentally changing modes when all you want to do is toggle between the Hex 80 and 24 columns modes. In the Directory Picker, to view a file, you must now press [Alt-V] instead of just [V]. You may now press any character (A through Z) and the cursor will move to the first entry starting with that letter. You can now toggle between displaying characters in their normal printing modes (e.g., happy faces, musical notes, etc.), periods or spaces. The new mode added, spaces, allows a cleaner display of an ASCII file for those distracted by the periods at the end of the line (representing the carriage return and line feeds). The /1 switch has been eliminated in this version to make DoubleTake easier to use as a single file viewer. If you wish to use DoubleTake as a single file viewer, simply enter DoubleTake with a single filename. Or, if you started DoubleTake with no command line arguments, simply enter the one filename you wish to view and press [Enter] once when asked for the second filename. When changing from Hex to ASCII and ASCII to Hex, DoubleTake stays at the same location (same character) in the file. A file can usually be read successfully in either Hex or ASCII mode. DoubleTake no longer checks a file for non-printing characters -- it starts in the mode (either Hex or ASCII) set in the DUBLTAKE.CNF file. DoubleTake uses the largest possible file buffers allowed by the amount of free memory available at start-up. For larger files, this means DoubleTake will load the file in larger sections and process the file faster. 3. ASCII Mode Unique Features. ASCII Mode has configurable End-of-Line characters. The default characters are Carriage Return (ASCII code hex $0D), Line Feed ($0A), CR with high bit set (WordStar, ASCII code $8D) and Linefeed with high bit set ($8A). You can choose your own End of Line codes to adapt DoubleTake to your specific word processor. Either one or two character End-of-Line characters can be handled. DoubleTake recognizes Carriage Return (CR) and Linefeed (LF) as the end of a single line. If the same End of Line character occurs twice in succession, DoubleTake assumes that this file only uses the one character to indicate End of Line and will reflect two lines, one for each End of Line character. DoubleTake shows either Line Number Mode or Show Byte At Cursor Mode. In the Line Number Mode, DoubleTake shows the actual line in the file; in the Show Byte mode, DoubleTake shows the byte at the cursor. ASCII Mode uses the [Tab] and [Shift-Tab] keys to scroll the screen right or left to view lines wider than the screen width. Can scroll files independently or together. A Quick-Return-to-Column-One key [Right-Shift-Tab] returns either or both files to the left margin) Added the ability to highlight a block and write it to a CLiP file of your own choice. Two CLiP files are available, one for each file, but you may change either or both clip files as you choose. Clip filenames default to the same filename as the compared file, with the extension of ".CLP," but you can change any part of the name. You can also send to a DOS device like PRN or LPT1. Enter a new filename, overwrite an existing CLiP file or continuously add to the end of it.