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

Answer:

D. 256

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