1.5 Subtraction in 2's Complement System

• Procedure:
1. 2's complement subtrahend
2. Added result to minued

1.4 Addition using Signed Numbers

• Carry generated by MSD is disregarded

1.3 Binary Arithmetic

• Binary addition is used for the operations of subtraction, multiplication and division in digital systems
• Binary subtraction is performed with addition via 2's complement form
• Sign bit is used to represent the sign of the number ( + or -)
• True magnitude form vs 2's complement form
• We negate a signed binary number by 2's complementing it 

1.2 Codes

• Binary-code decimal (BCD) is a code where each digits of a decimal number is represented by its binary equivalent
• Alphanumberic codes are codes that represent numbers, letters and special characters (ie. ASCII)
• Parity bit is used to detect error during binary-code info transfering

1.1 Digital Number Systems

• Octal system has a base of 8
• Hexadecimal system has a base of 16

Chp 1: Number Systems and Codes

• Binary digit (bit) is a digit that can take on only the values of 0 and 1