Canon 161
Calculator
Contents
Section
Page
Title & Contents (this page)
1
Notes & Signal Names
2
Block Diagram
3
Modules - Gates & Display
4
Modules - Flip-Flops
5
Timing
6
Keyboard
7
Control State Machine
8
Flags F–, FS, FX, F÷, FO
9
Flags FG, FH, FZ, FCO, FCU
10
FM Flag & Shift Pulse Generators
11
Counter Enable Flags FA, FB, FD, FP
12
A & B Counters (AC & BC)
13
Point Counter (PC)
14
Digit Counter (DC)
15
Arithmetic & ACC Register
16
IR Register
17
ME Register & Zero Gates
18
Power Supply
19
Timing Diagram
20
Connectors Nbb1p & Nbb2p
21
Connectors Nbb3p & Nbb4p
22
Board Layout - 30::33
23
Board Layout - 34::37
24
Board Layout - 38::40
25
Controller/Monitor Unit (CMU)
CMU.1
CMU Operation
CMU.2
Canon 161 Calculator
Section: Title & Contents
Page: 1
Rendition: 2022 Feb 6
This schematic has been derived
through the reverse engineering
of a Canon 161 calculator.
This is not the manufacter’s
schematic, nor based on the
manufacturer’s schematic.
Prepared by bhilpert.
