Questions

4520_COMP_SCI_X_0005 Week 8 Exam

Multiple fill-in-the-blank

Category: ALU The following diagram shows the interface to the Hack ALU and the effect of the six control inputs zx, nx, zy, ny, f and no. Notes: What are the values x1, x2, y1, y2, fout and out when the ALU control inputs have the following values? What values would be output on the zr and ng wires if the values of x and y are as follows?

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The problem presents the Hack ALU interface and asks you to determine the values for x1, x2, y1, y2, fout, and out under a given set of control inputs, followed by the values for zr and ng for two specific input pairs. Below I walk through each blank in order and explain why each value is what it is, then I relate those to the provided answers. - Blank 1 (x1): if zx == 1 then x1 = 0; otherwise x1 = x. In this scenario zx is 1, so x1 is forced to 0. This matches the provided first answer: 0. - Blank 2 (x2): if nx == 1 then x2 = ~x1 (the bitwise not of x1); otherwise x2 = x1. Since nx ......Login to view full explanation

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