Work on formatting

Expansion Port.md

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 # Expansion Port
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+Sentinel 65X features an expansion port along one side of the mainboard PCB. This port, a male edge connnector, exposes the same pins as the [cartridge port](Cartridge Port.md), and is intended to connect to a buffered backplane accessory. The port also features test points for all the signals on the port.
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+As with the cartridge port, the expansion port exposes the full system bus, as well as several chip select signals which simplify the development of expansions.

Kernel.md

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+gitea: none
+include_toc: true
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+# Kernel