Question

If a system's instruction set consists of an 8-bit opcode, what is the maximum number of output signal lines required for the control unit?

A) 8 B) 64C) 128 D) 256

Answer 1

D. 256

Step-by-step explanation:

Given

`Instructions = 8\ bit`

Required

Determine the maximum number of output

To get the required value, we make use of the following:

`Maximum = 2^n`

Where n is the bits of the opcode.

i.e.

`n = 8`

Substitute 8 for n in
`Maximum = 2^n`

`Maximum = 2^8`

`Maximum = 256`

Hence, option D answers the question