COA-CT2-A1(401-425)

In register transfer notation, the symbol "←" indicates:

• Address transfer

• Data transfer

• Control signal

• Memory fetch

The operation R2 ← R1 means:

• Transfer R2 to R1

• Transfer R1 to R2

• Exchange contents of R1 and R2

• Add R1 and R2

A conditional transfer can be represented as:

• R1 ← R2

• If (P=1) then R2 ← R1

• R3 ← R1 + R2

• R2 ← R2

The control lines for bus read and write operations are:

• 2

• 1

• 3

• 4

Memory transfer Read means:

• MDR → MAR

• MAR → MDR

• Memory → MDR

• MDR → Memory

The microoperation R3 ← R1 + R2 represents:

• Logical operation

• Arithmetic operation

• Control operation

• Shift operation

The INC operation does:

• Increments register by 1

• Decrements register by 1

• Clears the register

• Complements the register

Masking of bits is done using:

• XOR

• OR

• AND

• NOT

The OR logic microoperation sets bits when:

• At least one input is 1

• Both inputs are 1

• Both inputs are 0

• Inputs are complemented

A logical left shift introduces:

• 0 in rightmost position

• 0 in leftmost position

• 1 in leftmost position

• 1 in rightmost position