Addressing Modes Worksheet

In Immediate Addressing Mode, the operand is:

• Stored in memory

• Given directly in the instruction

• Stored in a register

• Stored in the accumulator

In Register Indirect Addressing, the operand is:

• Given in the instruction

• Stored in the accumulator

• Found using the address contained in a register

• Found in a specific memory address

Which addressing mode requires two memory accesses — one to fetch the address and one to fetch the operand?

• Direct

• Indirect

• Register

• Immediate

The instruction ADD R1, (R2) uses which addressing mode?

• Immediate

• Indirect

• Register

• Direct

If memory location 200 holds address 500, and memory[500] = 25, what will LOAD R1, (200) load into R1?

• 200

• 500

• 25

• Undefined

In Direct Addressing, if instruction says LOAD R2, 300 and M[300]=45, R2= ?

• 0

• 45

• 300

• 90

The instruction MOV A, #5 is an example of:

• Immediate Addressing

• Register Addressing

• Direct Addressing

• Indirect Addressing

In Implicit Addressing, the operand:

• Is mentioned in the instruction

• Is known from the instruction context

• Must be fetched from memory

• Is always zero

During which phase of the instruction cycle is the instruction decoded?

• Fetch

• Decode

• Execute

• Store

The Program Counter (PC) is incremented during the:

• Execute phase

• Decode phase

• Fetch phase

• Store phase