MiniDisplayTester 1.0

Posted by: Bill Martens Date: June 29, 2025 4 Likes 1181 Views

Dagen Brock has announced the initial release of his homegrown MiniDisplayTester app for the Apple II. Version 1.0 of the program is available for download in both 5.25 inch floppy disk image as well as a 3.5 inch floppy disk image in .2mg format. According to the GitHub page:

This is a program for Apple II computers to test various display modes. The tests are simple and are intended as an aid for people working on emulators or other hardware such as FPGA cores or video generators.

It’s designed to run on an Apple II under ProDOS for full compatibility across the line of systems. However, if you load it to address $2000 and jump to that address it should work without any OS, which is helpful if you haven’t emulated an entire Apple II yet. (It will relocate above to $4000 upon start to be able to draw on the high resolution screen.)

Each mode has multiple tests. You hit the same key repeatedly to cycle through the tests for that mode.

You can download the latest version of MiniDisplayTester from the GitHub page at:
https://github.com/digarok/MiniDisplayTester

Author: Bill Martens
A.P.P.L.E. Chairman of the Board and Club president -- Bill worked for the founder, Val J. Golding and A.P.P.L.E. from 1981 to 1982. In 1999, he began archiving the materials which were distributed and sold by A.P.P.L.E.. That project led to the group that remained of A.P.P.L.E. Bill was involved in the financial industry in Tokyo and has over 20 major office infrastructure projects to his name. In March 2001, he retired to write books and to spend more time pursuing personal interests. As the president of the users group, Bill is in charge of distribution of Call-A.P.P.L.E. magazine as well as the organization of this web site. Bill currently resides in Tokyo, Japan and Shelton, Wa splitting time between the places.
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