Assembly Language

Question 1

Name 4 registers and this uses

Answer 1

EAX - Accumulator stores current data for calculations
EBX - Base
ECX - Counter stores number for iterations
EDX - data stores data
Note: each register can store anything

Question 2

What is the syntax for a line of assembly language

Answer 2

Label: mnemonic variable, memory address; comment

Question 3

Name 4 status registers

Answer 3

CF carry flag - 1 if previous line had a carry
ZF zero flag - 1 if number is zero
SF sign flag - 1 if number is negative
OF overflow flag - 1 if overflow occurred

Question 4

Jumps

Answer 4

JC - jump carry flag
JZ - jump zero flag
JS - jump sign flag
JO - jump overflow flag
JE - jump equal to
JL - jump less than
JG - jump greater than

Question 5

While loop

Answer 5

Begin: mov eax, num1
Add 1
Cmp eax, 10
JL begin
Nop

Question 6

For loop

Answer 6

mov ecx, 10
Floop: add sum, ecx
Loop floop