ROM 0 can always be overloaded, but remember that you will not boot to the BASIC in that case ([[Hackit|the Hacker ROM]] is a popular replacement ROM 0, for example).
In-depth hardware details for creating your own ROM expansion can be found there: https://pulkomandy.github.io/shinra.github.io/gordon.html
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[[Category:Programming]][[Category:Memory expansions]][[Category:Peripherals]][[Category:CPC Internal Components]]