Iview

IVIEW is a Freeware DOS viewer for Ralf Brown's Interrupt List. The program file is IVIEW.EXE. Version 1.01 is 1798 bytes long. It requires a 386 and DOS 3.0 or later. There is an, optional, configuration file called IVIEW.INI. With the INI file you can customise the data file name and location, the video mode and the printer supported. A basic INI file is provided. IVIEW works with Ralf's original data file INTERRUP.LST. Ralf doesn't directly supply INTERRUP.LST but he does supply a batch file COMBINE.BAT to build it from the files he does distribute. To try out the basic functions of IVIEW, copy it to a directory on the computer's PATH and then run it from the directory which includes the INTERRUP.LST file. The following keys work: UP ARROW PAGE UP + DOWN ARROW PAGE DOWN HOME END F N P space ESC

Scroll up a line Scroll up a page Scroll up a topic Scroll down a line Scroll down a page Scroll down a topic Move to first topic Move to last topic Find first occurence of ... Fint next occurence Print current topic Toggle viewing mode Exit viewer

The two viewing modes are FULL and HEADINGS ONLY. The FULL mode displays the full contents of INTERRUP.LST. The HEADINGS ONLY mode displays topic headings only, prefixed where appropriate by the associated category, INT, AH and AL. The active line is the top line. Toggling from HEADING to FULL expands the topic in the top line of the HEADING screen. Toggling from FULL to HEADING reduces to the topic encompassing the top line of the FULL screen. Printing prints the topic encompassing the top line of whichever screen is in view.

In the FIND dialogue: 1

The search for alpha characters is case-insensitive

2

The character ? represents a wild character i.e. it matches anything

3

A space matches any white space, i.e. any string of spaces, horizontal tabs, line feeds or carriage returns.

In the FIND and NEXT processes: 1

A beep from the computer means "not found"

2

The search is of the FULL file. The only relevance of this is that the first 11 columns of the HEADINGS ONLY screen are derived by IVIEW. So if

you want data on INT 10 with AH=10, AL=12 find 3

-101012

not

-10 10 12.

The search is topic-to-topic, i.e. when the item is found in a topic the next find is from the end of that topic.

The INI file must have the same name as the viewer. It may be located in the same directory as the EXE file or in the current directory. An INI file in the current directory takes precedence of the one in the EXE file's directory, so you can have a basic INI file with the EXE file and then any number of INI files which are customised to the work carried out in the individual directories in which you use IVIEW. The INI file must be a TEXT file of lines with the following structure: =[<parameters>] The Item Identity Word is predefined and must appear as below. The optional parameters are customisable. Currently defined items are: DataFile= VideoMode= PrintInit= PrintReset= As an example, the following is the INI file for my computer. It contains an ATI video card where mode 33 selects 132x44 text display. It is connected to an HP 4L printer. The Init string includes PCL5 escape sequences to reset the printer, select 12 characters-per-inch and 8 lines-per-inch. The Reset string consists of a form-feed character to eject the last page of the print and the printer reset sequence. DataFile=c:\ralf\interrup.lst VideoMode=33 PrintInit=1b,45,1b,28,73,31,32,48,1b,26,6c,38,44 PrintReset=c,1b,45 If you don't know your EGA or VGA video codes but would like to see more than 25 lines, try VideoMode=ffff. Without the INI file the data file is assumed to be INTERRUP.LST and it is assumed to be in the current directory.

IVIEW was written as an exercise in the art of tight coding. Comments, be they brickbats or bouquets, to John Harry Adams at [email protected]

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