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• 20:23, 7 March 2025 GMalcom talk contribs created page UART Chip Replacement on COM4 and COM4A Boards (Created page with "<p>This procedure provides instructions for the replacement of the UART chip on the COM4 or COM4A board in the APU-102 card cage. It applies to 486-based Comet Electronics APU units, especially those that have been upgraded with the APU Version 5 Pentium Kit. This applies only to units containing either a COM4 board or a COM4A board manufactured before 1999.</p> = Specifics = <p>Compatibility testing has revealed that in rare instances, when a 486-based Comet Electronic...")