There were several revisions to the main board between 1990 and 1997. There are reportedly 7 of these, with varying video output quality.

main - Motorola 68000

audio - Zilog Z80

main - 64K

video - 84K

sound - 2K

AV connector - same pinout as Genesis model 1, RGB, composite, mono audio.

Power - DC barrel jack from an SNK-branded wall wart, varies by model 5V-12V?, back

Catridge slot - double 2-sided edge connector, top

Controller 1&2 - DB15, front

Headphones - 2.5mm headphone jack, front

Memory card slot - proprietary, similar to cardbus, front

Power - sliding SPST, front left

Headphone volume - fading slider, front middle

Reset button - pushbutton, left side on the top

Joystick - four direction, clicking microswitches

Buttons - 6x, PAD A-D, START, SELECT

When repairing AES hardware, it is important to be able to identify aftermarket hardware alterations and additions. These may impact what parts need to be repaired or replaced. Common changes include:

  • Replacing the BIOS ROM with a soldered or socketed UNIBIOS chip. This can sometimes be seen by opening the game slot flaps and looking down and to the right.
  • Installing panel-mount video and audio connections along the rear or side of the enclosure. There are no RCA or S-video connections on a stock system. Some variations on this mod may include the addition of a component converter board or other electronic components inside the enclosure.
  • Installing LED lights under the reset button or in a controller.

The AES was the first console to offer a separate, removable memory card for storing game data.

The commercial release of the console in the US saw prices of $399-$649. Game cartridges were priced at $200 and up.

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