Assembly language Flashcards
1
Q
Define opcode
A
Mnemonics for what the instruction does
Things its doing
2
Q
Define operand
A
The data/input that instruction uses
Thing being done
3
Q
What can instructions do
A
Very little:
Move data around
Simple arithmetical and logical operations
Simple branching
4
Q
Define immediate addressing
A
Data is hard-coded into instruction.
The number itself
5
Q
Define direct addressing
A
Address in the main memory where data is being fetched from
The memory location
6
Q
What takes longer immediate or direct
A
Direct will take longer as main memory needs to be accessed
