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General| Brand | Radio Shack |
|---|---|
| Model | TRS-80 26-3650 |
| Category | Calculator |
| Language | English |
Covers calculation functions, commands, program functions, and calculation range.
Describes the CPU unit and its connections in the block diagram.
Lists the key features and specifications of the HD61913 CPU.
Details the pin assignments, signal names, and functions for the CPU.
Provides detailed steps for taking apart the PC-4 pocket computer.
Diagnoses and solutions for display, key entry, RAM1, and RAM2 problems.
Lists error codes 1 and 2, their causes, and corrective measures for memory and syntax.
Lists error codes 3, 4, 5, 6, 7, 9, their causes, and corrective measures.
Provides diagnostic steps and solutions for SAVE, LOAD, remote control, and general operation problems.
Lists components for the PC-4 pocket computer (26-3650) with RS and manufacturer part numbers.
Lists components for the cassette interface (26-3651) with RS and manufacturer part numbers.
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