3.7.3.4 Addressing Modes. Flashcards
1
Q
Outline an addressing mode.
A
One bit in a machine code instruction is usually assigned to the addressing mode in use.
2
Q
Outline the two types of addressing modes.
A
Immediate.
Direct.
3
Q
Outline immediate addressing.
A
The value specified in the operand is to be treated as the actual value e.g. an operand of 18 means the value would be 18.
4
Q
Outline direct addressing.
A
The value specified by the operand signifies a memory address.
An operand of 18 means the operation would be whatever the content of memory location 18 is.
5
Q
How does direct addressing differ from immediate?
A
The value specified by an operand signifies a memeou address in direct.
