Question

Given the value of the A and B registers [ A and B buses) could be referred to as the rs1 and rs2 as being 13₁₀ and 15₁₀ what value in (HEX] will be placed in the bus MUX when no WORD is placed in memory and the control unit place places values [ F₃ F₂ F₁ F₀ ] = [1 0 0 0]

O 0100
O 111B
O 011B
O 0010
O 111B

Answer 1

The control signals [0 1 0 0] dictate the selection in the bus MUX, but without the specific MUX logic table, the exact hex value that will be placed on the bus cannot be determined from the given information. Option 1 is correct

Step-by-step explanation:

When considering the control unit and the bus multiplexer (MUX) in a computing environment, the control signals [F3 F2 F1 F0] dictate which inputs are selected and forwarded by the bus MUX. In this scenario, the control signals are set to [0 1 0 0], which typically indicates which operation or source is selected for the data to be placed onto the bus. However, without knowing the specific architecture or the design of the bus MUX, we cannot determine the exact outcome.

Commonly, each different sequence of control signals corresponds to a different source, be it registers, inputs, or results of operations. The values provided for rs1 and rs2 (A and B registers) are 1310 and 1510 respectively, which in hexadecimal are D (1310=D16) and F (1510=F16). Without the actual MUX logic table, we can't precisely determine the hex value that will be placed on the bus.

In this question, we are given the values of the A and B registers, which can be referred to as rs1 and rs2. The values of A and B are 13 and 15 in base-10 (decimal) representation. We are also given a control unit configuration represented by [ F₃ F₂ F₁ F₀ ] = [0 1 0 0]. We need to determine the value in hexadecimal that will be placed in the bus MUX when no word is placed in memory.

To solve this, we first convert the decimal values of A (13) and B (15) to hexadecimal. The hexadecimal representation of 13 is 0xD, and the hexadecimal representation of 15 is 0xF. Next, we look at the control unit configuration. When [ F₃ F₂ F₁ F₀ ] = [0 1 0 0], the value in the bus MUX is determined by rs2 (B) since F₀ is 0. Therefore, the hexadecimal value that will be placed in the bus MUX is 0xF.

So, when no word is placed in memory and the control unit configuration is [ F₃ F₂ F₁ F₀ ] = [0 1 0 0], the value in the bus MUX will be 0xF.