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TI-55, -57, MBA


Impressive technology in its day, a single TMC1500 series chip powered each of these programmable machines.

Datamath Calculator Museum

The ROMs were packed so tightly that a few quirks show through. See my articles:
Hidden Opcodes on the TI-55
The TI-57 Memory Map
Conditional Branching with the TI-MBA
The TI-57 Constant ROM

From the album:

70's Computing

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