Inside a Classic: The TRS-80 Model 100

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Memory Power


Four AA batteries is all it takes to power the Model 100 for up to 20 hours. The 100 stores user files in battery-backed RAM for instant access, which made them subject to loss when the batteries ran out. To prevent this, a small NiCD battery soldered to the motherboard constantly recharges and maintains the memory between battery changes. To wipe that memory out, the user flips the "memory power" switch seen here.

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Inside a Classic: The TRS-80 Model 100

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