CSCI 101 Introduction to Computers Class Notes (Fall 2025)
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 0 = 0000
 1 = 0001
 2 = 0010
 3 = 0011

10 = 1010 = A
11 = 1011 = B




Friday, September 05
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a = 20
b = 12

gcd = 8 % 4 = 0

a = 4
b = 0

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Built-in function:
A = SQRT( 100 )

High-leval language:
A = A + 1

Assembly language:
load $1, A
add $1, $1, 1 
store $1, A

Machine Code:
100001100000001111000000000000000000

ADD
SUB
INC

Micro architecture:
MUL using ADD

6 = 2 x 3 = 2 + 2 + 2

12 = 3 x 4 = 3 + 3 + 3 + 3


Instruction Set Architecture (assembly language)
(e.g., having + but no x)

  1 + 2 = 3

Microarchitecture (e.g., simulating x by +)

  2 x 3 = 2 + 2 + 3 = 6