Early
Electronic
Calculator
Casio 121-B Calculator
Schematic

Section Page
Title & Contents 1
Notes 2
Block Diagram & Signals 3
Timing Diagram 4
Timing & Keyboard 5
Control - Part 1 6
Control - Part 2 7
Registers & Arithmetic 8
Display & Power Supply 9
IC Pinouts 10

Downloading and printing



  Photos | Schematic
Casio121-B
Calculators | Integrated Circuits | Displays | Simulations
EEC