TRS-80 Model 1 FreHD Expansion Interface

Radio Shack Expansion Interface Alternative

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The FreHD works well with the TRS-80 Model 1 relying on a replica of the Radio Shack 26-1132 adaptor and either an Expansion Interface or internal modifications to provide 48K RAM and FreHD autoboot. Great options if you have an Expansion Interface or are happy to change your machine from stock configuration but both are barriers to many and to me offered a challenge for another hardware project.

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