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Diagnostic BIOS (Neo Geo AES)

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A very useful way to test the Neo Geo AES is to replace the BIOS with a socket, and then drop in the Diagnostic BIOS.

This Diagnostic BIOS cannot play games, its sole purpose is to test the hardware and report errors to help easily diagnose issues on the Neo Geo.

More details about the BIOS can be found here.

Use the T48 programmer to program a blank BIOS chip if you have one, or just buy a Diagnostic BIOS directly from us.

Updated 01 May 2023
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