Sega Mega Drive/Genesis

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Hardware Variations

Over its lifetime, the Genesis came in three different models, each of which had several motherboard revisions themselves. For more details, see Sega Genesis Hardware.

Model 1

Model 1 Genesis

The model 1 Sega Genesis is the largest model and features a headphone jack with a volume slider. There are at least seven motherboard revisions that can be found inside of a model 1 Genesis, labeled VA1 - VA7. Early revisions, which bear the text "HIGH DEFINITION GRAPHICS" in white above the cartridge slot on the case, are known to have the best audio output of any version of the Genesis. The VA7 is the latest revision, and internally they are identical to the model 2 Genesis, and they do not have the "HIGH DEFINITION GRAPHICS" text on them.

Model 1 Motherboard Revisions
Revision
Notes
VA1
-
VA2
-
VA3
-
VA4
-
VA5
-
VA6
-
VA7 No "HIGH DEFINITION GRAPHICS" text. Internally similar to the model 2.

Model 2

Model 2 Genesis

The model 2 was smaller than the model 1 and lacked a headphone jack but was capable of outputting stereo audio through its rear A/V multi-out.

Model 1 Motherboard Revisions
Revision
Notes
VA1 Most common revision.

Model 3

Model 3 Genesis

The model 3 suffered from compatibility issues.

See Also