Contents
Section
Page
Title & Contents (this page)
1
Notes & Signal Names
2
Block Diagram
3
Timing
4
Keyboard and OP Flag
5
Control (part 1)
6
Control (part 2)
7
Registers
8
Decimal Point Register & Q Flag
9
Arithmetic
10
Display Latch & Display
11
Power Supply
12
Timing Diagram
13
IC Pinouts & Physical Layout
14
Connectors
15
Facit 1123
Calculator
Facit 1123 Calculator
Section: Title and Contents
Page: 1
Rendition: 2014 Mar 6
This schematic has been derived through the reverse
engineering of a Facit 1123 calculator.
This is not the manufacter’s schematic, nor is it
based on the manufacturer’s schematic.
