Web Reference: May 3, 2025 · Recently I started to investigate work of various Atari testing cartridges. 1. STE Test v1.9. 2. ST Diagnostic v4.4 (and also some older versions) 3. MegaSTE Diagnostic v1.5. As I have my working STE and relevant testing cartridge, it was widely tested. The Testcart is a cartridge that allows you to test Atari 2600 consoles and controllers. When you power up a 2600 with this cartridge inserted, it first displays a test pattern and plays some music to verify that the sound and video are working. Simply select the test you wish to run by typing the letter and pressing 'Return'. Note that without the test harnesses, tests for joystick/mouse, external DMA, Midi, serial and printer ports cannot be run successfully.
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Last Updated: April 11, 2026
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