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General| Type | Programmable Calculator |
|---|---|
| Model | PC-1211 |
| Category | Calculator |
| ROM | 4 KB |
| Programming Language | Basic |
| Year Released | 1980 |
| Display | LCD |
| Power | Battery |
| Functions | Scientific |
| Display Digits | 24 |
Details the liquid crystal display specifications, including type and capacity.
Outlines computational capacity, calculation method, and memory buffer types.
Lists supported arithmetic operations, trigonometric, and logarithmic functions.
Describes cursor movement, insertion, deletion, and line control functions.
Identifies the programming language as BASIC.
Specifies battery type, operational life, and power consumption.
Covers data protection, peripheral units, and physical dimensions.
Explains the distinct roles and assignments of the two central processing units.
Details the configuration and map of the system's RAM modules.
Describes the structure and data handling within the display buffer.
Explains the generation and regulation of voltages for the LCD.
Lists pinout, signal names, and descriptions for the SC43157 CPU.
Lists pinout, signal names, and descriptions for the SC43178 CPU.
Provides pin connection diagrams for key integrated circuits.
Step-by-step instructions for safely dismantling the unit.
Guidance on inspecting and repairing internal components.
Detailed steps for replacing Liquid Crystal Display Integrated circuits.
Procedures for checking the device's current draw in different states.
Explains the methods and formats for recording data onto tape.
Details the process and circuitry for reading data from tape.
Describes how the CE121 interfaces with external devices for cassette control.
Provides specific test data and procedures for verifying CE121 functionality.
Outlines troubleshooting steps and cautions for CE121 repair.
Illustrates the overall operational logic and component connections.
Shows the physical layout of components on the main operation board.
Details the electronic schematic for the keyboard input system.
Shows the component layout for the keyboard printed wiring board.
Presents the detailed circuit schematics for the CE-121 peripheral.
Illustrates the component placement on the CE-121 printed wiring board.
