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Test Pattern Generator

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Year released:
[www].se [ftp].se [mirror].us
TestPatternGenerator.img_.bin (462.25 KB)
For System 1 - 5 - System 6.x
This app works with: Mini vMac

Test Pattern Generator (or "TPG") was originally packaged on a 400k floppy diskette with Larry Pina’s book Macintosh Repair & Upgrade Secrets (Hayden Books, 1990). The software is intended for generating test patterns when calibrating the video and audio output of early Macs.

Two programs are included: "128k-TPG", for the original Macintosh, and "512k-TPG", for the Macintosh 512k or later.

The main difference between the two is that "128k-TPG" is specifically intended for the original Macintosh computer and its built-in 9-inch monitor, whilst "512k-TPG" can be adjusted to display test patterns for multiple different monitors, including custom models. Additionally, only "512k-TPG" can be used to produce test tones for audio calibration.

Special thanks to Jeff Walther and tt for imaging and archiving this software. It was previously available on another website, but it has since gone down.

Architecture: 68k

TPG is intended for use with early Macs such as the 128k, 512k, Plus, and SE, as well as the Macintosh XL (Lisa 2). However, 512k-TPG has been tested to run correctly on a Macintosh LCIII with VGA output running System 7.5.5, and may run fine on other models and system versions that are capable of running 68k software.