Assembly Language Programming - AS Level

Machine Code uses mnemonics to represent instructions

• True
• False

What is a MNEMONIC?

• A single action that can be performed by a computer.

• A symbol that represents an instruction in assembly code.

• A high level language keyword.

• A register used inside a CPU A register used inside a CPU.

Define instruction set

• The complete collection of instruction that are understood by CPU

• The complete collection of instruction that are understood by human

• The complete collection of instruction that are understood by student

• The complete collection of instruction that are understood by binary

Which addressing mode does the instruction LDI belong to?

• Immediate

• Direct

• Indirect

• Indexed

Which of the following instruction can be used to load the value 42 in to accumulator

• LDI 42

• LDD 42

• LDM #42

• LDX #42

What does the instruction STO 100 do, provided 100 is an address in the main memory?

• Copy the value from acumulator to the address location 100

• Copy the value from address location 100 to the accumulator

• Compare the value in accumulator with the value stored at the address 100

• Jump to the memory location 100

The instruction JPE or JPN is always written following a comparision statement.

• TRUE

• FALSE

What is the purpose of the instruction INC IX?

• Increment accumulator content

• Increment Index Register

• Decrement Index register

• Decrement accumulator

Which instruction is used to compare the value in accumulator against a value?

Write down the instruction to load a value of 3 in to index register.