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This page was last updated on July 19, 1998
AP340 AutoPerimeter Data Presentation
This DOS based program took, as input, character based data from either a stored file or directly from a Kowa Optimed AP 340 Auto Perimeter's serial port. (An auto perimeter is an instrument used by optometrists an ophamologists to measure the peripheral vision of a patient. It provides data that represents the sensitivity of the eye in Polar coordinates. If plotted in three dimensional space, these data points construct a "Hill of Vision" image which can be used by the medical practitioner to diagnose certain eye disorders.) This program then provided various file archival services, using various dos services, to organize patient files in directories, display the directory contents and allow for the user to load previously saved files. Once loaded, the files' data is converted to Cartesian coordinates for presention on the CRT. Keyboard controls allow the user to view the 3D "Hill of Vision" from any angle. Other options allowed the user to view a "slice" through the "Hill" as well as overlaying the results of a previously taken baseline data set for comparison purposes, where changes that exceeded a threshold would be displayed in a visually distinctive manner. Written in Turbo Pascal, the program provides reasonable graphics performance on 80386 class machines and up, requiring only VGA graphics support. Program has not been tested within the Windows environment. This program is still available from me to owners of Kowa Optimed AP340 autoperimeters. Cost is US$100.00 Reply by Email.
Hardware Configuration Program
This program is used to create configuration data to allow an E1/T1 clock reference card to be built with a wide array of options. It generates and then maintains a database that it can search for existing dash versions that provide the required outputs so as to avoid creating new dash versions. In addition to maintaining the database it also creates a prototype bill of materials and a jumper configuration chart to allow clerical level personnel to create new dash versions without requiring a great deal of enginnering supervision. Since the numerical possibilities of the available options exceed 6 billion different combinations this program is a great time saver. Written in Turbo Pascal as part of my normal responsibilties for TrueTime Inc, this program has no value to anyone outside that company.
Test Software
Various small programs have been written to test the functionality of new hardware I have designed to run on a PC or data acquisition programs written to automate lengthy tests and save the data in formats usable by spreadsheet programs for data reduction. These are typically used to gauge the long term affects of time or temperature on oscillators or phase locked loops.