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Text File | 1989-09-17 | 23.0 KB | 576 lines

DRLIST Version J (c) Copyright Vernon D. Buerg 1986-89 Special BBS/CTTY Version ________________________ Sept 17, 1989 Table of Contents ----------------- Description ...................... 1 Display format ................... 2 Status line ..................... 2 Command line .................... 3 Keys and commands ................ 4 Positioning to lines ............ 5 Cloning procedure ................ 6 DEBUG Information ............... 7 Screen attributes ............... 8 Searching for text................ 9 Filtering ........................ 10 Update history ................... 11 Special version remarks .......... 12 Restrictions ..................... 13 DRLIST Page 1 Command DRLIST ------------- Purpose: To display the contents of an ASCII text file, line by line with the aid of scrolling, positioning and filtering commands. Format: DRLIST [d:][path]filename[.ext] Remarks: An ASCII file of any size may be listed. The "filename" is optional. If omitted, you are prompted to to enter a filename. You may include drive, path, and wild cards in the file name. The first file which matches the name is displayed until an end-of-file character is encountered. Each file which matches the "filename" may be displayed. DRLIST was designed to display ASCII files. That is, files which contain text and not binary or control codes. Text characters usually range from a value of 32 to 127. To view binary files (COM, EXE, etc), the D-key hex dump display option is available. Characters below 32 (a blank) are replaced with a funny character to indicate that a non-displayable character has been encountered. This character is an upside-down question mark. Characters above 127 may be valid graphic characters, and may be displayed if the '8' command is in effect. To insure that characters above ASCII value 127 are not displayed, use the '7' command. The top line of the display gives the file name, current right scroll offset, and the file's creation date and time. Optionally, a ruler may be displayed on the top line by using the R key. The file is displayed with one logical record on each 80-column display line. A logical record ends in a linefeed. The maximum logical record may be 256 characters long. If the record exceeds 80 characters, you may view the portion beyond the 80 columns by using the scroll right command, or by using the Wrap feature. The Wrap command toggles ON or OFF the wrapping of lines longer than 80 characters. With Wrap on, lines are displayed in their entirety, 80 characters per display line. The scroll -left and -right functions are disabled when Wrap is ON. The file may be PRINTed as it it displayed. The P command toggles the printer on or off. When first entered, the P command causes the current screen to be printed. As new lines are displayed, they too are printed. Printing may be stopped by entering another P command. The PrtSc key may also be used, but the title and prompt lines will be printed with the lines of the file. Empty lines cause a line to be skipped on the printer. The letter P is displayed in column 80 of the top line while printing. DRLIST Page 2 Display format -------------- The monitor display is defined in terms of lines and columns. A typical monitor can display 25 lines of 80 columns each. DRLIST attempts to use the number of lines and columns for the monitor mode in use. For example, if the monitor is in 40 column mode, DRLIST displays only 40 characters per line. The top line of the display is called the Status line. The bottom line is called the Command line. The remaining lines are called the primary display window, and are usually lines 2 through 23. Status line format ------------------ The Status line has the following format: DRLIST lllll +sss mm/dd/yy hh:mm bKMPSW - filename where, 'DRLIST' is the name of this program 'lllllll' is the line number of the first line in the display window (usually on line 2) '+sss' if displayed, this is the Scroll amount, in multiples of 20, corresponding to the number of columns that the display has been shifted to the right to view records longer than 80 'mm/dd/yy' is the file's creation date 'hh:mm' is the file's creation time 'D' indicates that the hex Dump display option is in use 'b' indicates whether the 7-bit, 8-bit, or *-option is in use 'K' indicates that the Keyboard flush option is in use 'M' indicates that tests for monitor retrace are not made 'P' indicates that Print is in use 'S' indicates that the C (file sharing) is in use 'W' indicates that the Wrap mode is in effect DRLIST Page 3 Command line format ------------------- The Command line has the following format: command message ______ Keys: Num-keypad Q=next X=exit ?=Help where, 'command' indicates the current process: 'Command' you are being asked to enter a command enter the letter, or press the keys for the action to perform 'Reading ' the file data is being read 'Filter ' the file data is being formatted for display 'Scanning' the Scan/Find text is being searched for 'Scan ' you are being asked to enter text to locate 'Find ' in the file, up to 31 characters may be entered '# lines?' you are being asked to enter a 1 to 5 digit number that is the amount of lines to skip 'Line #? ' you are being asked to enter a 1 to 5 digit line number to which the display is to be positioned 'message' may be one of: '*** Text not found ***' the Scan/Text was not found in the file ' *** Top of file ***' the first line of the file is being displayed ' *** End-of-file ***' the last line of the file is being displayed DRLIST Page 4 Key functions and Commands -------------------------- On the COMMAND line, enter a letter or control key: Letter(s) Default Function --------- ------- ------------------------ A find next occurance of 'text' B skip to end of file (bottom) C off toggles closing of (shared) files D toggles hex dump display mode E on set hi-bit on, Eight-bit mode F Find 'text' regardless of case H or ? list commands (HELP) K off toggle keyboard flush; if on, commands may be queued up by holding a key down L scroll left 20 columns N down one (next) line P off toggle printer on or off Q display next matching file R toggles ruler on top line S off toggles hi-bit off, Seven-bit mode T restart from first line (top) U scroll up one page (23 lines) W off toggle wrap of lines over 80 chars X terminate, clear screen and exit to DOS Z Exit to DOS with prompt on line 2 0 reset scroll to column 1 * off toggles special * document filtering # positions to a specific line number + position a given number of lines forwards - position a given number of lines backwards \text Find 'text' regardless of case /text Scan for exact text match , change background for main body of display . change foreground for main body of display < change background for top and bottom lines > change foreground for top and bottom lines Enter or Space-bar continue to next page ESCape Display next matching file (like Q) DRLIST Page 5 Key functions and Commands (cont.) -------------------------- ________________________________ Numeric keypad with NumLock on ________________________________ # over key Function ------------- ------------------------------------------- 1 END position to end of file (bottom) 7 HOME restart from first line (top) 9 PgUp scroll up one page, 23 lines 3 PgDn scroll down one page, 23 lines 4 left arrow scroll left 20 columns 6 right arrow scroll right 20 columns 8 up arrow up one (previous) line 2 down arrow down one (next) line Control key Function ----------- ------------------------------------------- alt-C clone DRLIST.COM, change colors or options permanently in program file Positioning to Lines -------------------- Each displayable line of the file is assigned a line number. The first line is assigned line number 1. The highest allowable line number is 65535. In order to determine the last line number, the entire file must be read. For this reason, the first time that the END (bottom) command is issued, it will take longer to process. If the Wrap option is in effect, there is one line number required for each 80 bytes of the file records. If the hex dump option is in effect, there is one line number required for each 16 bytes of the file. You may position to a specific line number by using the # character key. When # is entered, you are prompted for the line number to position to. Enter the 1 to 5 digit line number. The display will now begin with that line number at the top of the screen. To position forward or backward, you may use the + (plus), or - (minus) keys. You are prompted to enter the number of lines to be skipped. The display resumes at the line number shown on the top (status) line, plus or minus the number of lines that you specified. DRLIST Page 6 Cloning procedure ----------------- The screen colors, the display retrace testing (M), the file closing (C) and ruler (R) options may be permanently set in the program by using the alt-C cloning function. For cloning to take effect, the program must be called DRLIST.COM and it must be on the current drive and in the current directory. The clonable options (command toggles) are: M = Mono monitor, affects retrace testing, no effect with ANSI R = use ruler on top line, C = file(s) are shared, not left open while displaying D = hex dump display, like the DEBUG format W = Wrap long lines E/S/* = display all 256 values, or 7-bit, or special cases K = flush Keyboard each time a command is read DRLIST Page 7 DEBUG Information ----------------- An alternative to cloning is to use DEBUG to make permanent changes. Here is a list of key items and their addresses: 0126 - special lines 1 and 25 colors, default is 01 (blue) Refer to a technical reference guide for the attribute values for the colors that you want. 0128 - normal lines 2 thru 24 colors, default is 02 (green) 012A - bright color for Find/Scan, default is 0C (bright red) 012C - options; bits 0 through 6 MRSD WHK. M = mono, x'01' R = ruler, x'02' S = shared, x'04' D = hex display, x'08' W = wrap mode, x'10' H = hi-bit on, x'20' K = kybd flush, x'40' By specifying the bit value, the option is enabled. For example, to enable Shared and Retrace, specify a hex value of 05. The letters and command keys may also be changed. There are two tables involved: WHAT and WHERE. The WHAT table contains a list of one-byte keyboard codes. The WHERE table contains a list of two-byte addresses. If you really want to change the codes, here are the DEBUG addresses: 0472 - *WHAT* eye catcher 0478 - list of ONE byte command letters and characters 04A5 - *WHERE1* eye catcher 04AD - list of corresponding two byte offsets to routines NOTE: These DEBUG addresses are version dependent. ================================================== DRLIST Page 8 Screen attributes ----------------- The colors used for displaying the titles and main body of text may be changed temporarily or permanently. To make a permanent change, the cloning command alt-C is used. It requires that the DRLIST.COM program file be on the current drive and in the current directory. There are three classes of attributes used. One for normal display lines - lines 2 to 23 - another for special lines - lines 1 and 24, and a third for the Find/Scan color. The border is not changed. The foreground color applies to the characters displayed. These color attributes may be changed by using function keys: For the main body of text: , (comma) - background color . (period) - foreground color For the top and bottom lines: < (less than) - background color > (greater than) - foreground color Only one line is redisplayed when you change the "normal" colors, background or foreground. The display is scrolled up one line to reveal the next line with the new colors. Once you have decided upon the colors, use the alt-C key combination to change the DRLIST.COM program file. If DRLIST is used from a remote computer, the default colors used by DOS will be changed to those used by DRLIST. DRLIST Page 9 Scanning for text ----------------- You may use Find (\) to search for text regardless of the case, or you may use Scan (/) to find an exact match. To scan for a character string, type a slash (/) followed by one or more (up to 31) characters. The scan text, but not the slash, is displayed on the command line. The scan is case sensitive. That is, lower case scan text will only match lower lower case file text. While the program is searching for the text, the bottom display line is changed to say "Scanning". If the text is found, the line containing it is displayed as a high-intensity line (bright color). If the text is NOT found, the bottom line (24) is changed to say '*** text not found ***', and the display remains unchanged. To find the next occurrance of the same text, use the A)gain command, or press the A key. If the PCED keyboard enhancement program is installed, the up/down cursor keys may be used to recall and edit previously entered Scan/Find text. In a shared file environment, if the file changes while being listed, the file position may become invalid. Use the 7 letter command to insure proper file synchronization, or use the C (shared) option. DRLIST Page 10 Filtering --------- Filtering is the term used to describe the process that DRLIST uses to format file data for displaying on a monitor. After data is read from a file, it is filtered. The method of filtering depends upon the options in effect. For a typical ASCII text file, the filter removes carriage return and line feed characters, and expands TAB characters. The S, E, and * (asterisk) commands determine whether characters above ASCII-127 are displayed. If the hi-bit option is off (S command), the filter strips the high order bit from each character. If the hi-bit option is on (E command), all characters, including graphic characters above ASCII-127, are displayed. The * (asterisk) command displays only ASCII characters below 128 (x'80'), but treats the special characters x'8A' and x'8D' as line-feed and carriage-return control characters. Any other characters above 127 are ignored. The Wrap option causes the filtering to insure that no line exceeds the width of the monitor, e.g. 80 characters. The hex dump option (D key) causes the filtering to reformat the file data into a DEBUG-like display format. The largest file that can be "dumped" is 1 million bytes. NOTE: The EOF control character is ignored in this version. =========================================================== DRLIST Page 11 Update history -------------- Lines beginning with | denote changes to the latest version. Version 5.83, May 6, 1986. Version 5.84, May 8, 1986. Version 5.85, May 9, 1986. Version 5.86, May 10, 1986 Version 5.87, May 11, 1986 Version 5.88, May 13, 1986 Version 5.89, May 14, 1986 Version 5.90, May 18, 1986 Version 5.91, May 19, 1986 Version G, June 14, 1986 - special version called DRLIST for use with BBS Doors or CTTY Version H, July 7, 1986 - restrict display to lines 1 through 24 to allow line 25 to be used by communications programs - redisplay only last line when ., are used to change colors Version I, June 17, 1989 - correct console input problem using CTTY under OmniView - add file sharing (via SHARE) for DOS 3 and later - correct expansion of TABs in Help screen | Version J, Sept 17, 1989 | - correct prompt for filename DRLIST Page 12 Special ANSI version -------------------- The special ANSI version of DRLIST uses DOS function 21 hex for all display I/O. This means that the display will be slower, but it also means that ANSI escape squences can be displayed, and that DRLIST can be used by a remote computer via the CTTY or BBS DOORS facility. The use of function keys, e.g. F1, and the cursor positioning keys are not supported by all DOS environments or communications programs. Therefore, the cursor positioning keys have been redefined to be the numbers over those keys. By setting NumLock on, the cursor positioning keys will have effect. For example, the PgUp key may not work, but the 9 key will perform the PgUp function. The Fn (function) keys have had letters assigned to them. DRLIST Page 13 Restrictions ------------ o ANSI.SYS is required. (an equivalent may be used) _____________________ o The program requires 60K bytes of memory. If more memory is available, it is used to store more of the file in memory. o The line number is currently limited to 65535. o The file size is limited to 16 million bytes. o PC-DOS Version 2.0 or later is required. Written by Vernon Buerg for the IBM PC using DOS 2.0 or later, including DOS 3.3. DRLIST is supplied for personal, private use. Feel free to distribute DRLIST given these restrictions: o the program shall be supplied in its original, unmodified form, which includes this documentation; o no fee is charged. o commmercial use is prohibited. o the program may not be included - or bundled - with other goods or services. Exceptions may be granted upon written request only. If you are using DRLIST and find it of value, your gift in any amount ($15 suggested) will be greatly appreciated. Makes checks payable to Vernon D. Buerg. Thank you. For use by corporations and other institutions, please contact me for a site licensing agreement. Vernon D. Buerg 139 White Oak Circle Petaluma, CA 94952 Data: (707) 778-8944 (VOR BBS) Compuserve: 70007,1212