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One logic function that is used for a variety of purposes

(including within adders and to compute parity) is exclusive OR. The output of a two-input exclusive OR function is true only if exactly one of the inputs is true. Show the truth table for a two-input exclusive OR function and implement this function using AND gates, OR gates, and inverters

Short Answer

Expert verified

Truth table:

A

B

0

0

0

1

0

1

0

1

1

1

1

0

Implementation:

Step by step solution

01

Determine the logical gates

The basic logic gates are AND, OR, and NOT. AND gate will take two inputs and produce output as 1 only if both the inputs are 1. OR gate will take two inputs and produce output 1 if any of the inputs is 1. NOT gate will take only one input and gives the opposite of the input as the output. 1. All the logical gates will be represented by the truth tables. XOR, NAND, XNOR are the exclusive gates that are derived from the basic gates.

02

Determine the truth table for a two-input exclusive OR function and implement this function using AND gates, OR gates, and inverters.

The exclusive OR function will result in 1 if both the inputs are different.

The truth table of the exclusive OR function is as follows:

A

B

0

0

0

1

0

1

0

1

1

1

1

0

Implementation of Exclusive OR function using AND, OR, and inverter gates.

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Most popular questions from this chapter

We would like to execute the loop below as efficiently as possible. We have two different machines, a MIMD machine and a SIMD machine.

for (i=0;i<2000;i++)

for(j=0;j<3000;j++)

X_array[i][j] = Y_array[j][i] + 200;

6.11.1 [10] For a 4 CPU MIMD machine, show the sequence of MIPS instructions that you would execute on each CPU. What is the speedup for this MIMD machine?

6.11.2 [10] For an 8-wide SIMD machine (i.e.,8 parallel SIMD functional units), write an assembly program in using your own SIMD extensions to MIPS to execute the loop. Compare the number of instructions executed on the SIMD machine to MIMD machine.

A.1 [5] Section A.5 described how memory is partitioned on most MIPS systems. Propose another way of dividing memory that meets the same goals.

Implement the logic equations of Exercise B.43 as a PLA.

First, write down a list of the daily activities that you typically do on a weekday. For instance, you might get out of bed, take a shower, get dressed, eat breakfast, dry your hair, and brush your teeth. Make sure to break down your list so you have a minimum of 10 activities.

6.1.1 Now consider which of these activities is already exploiting some form of parallelism (e.g., brushing multiple teeth at the same time, versus one at a time, carrying one book at a time to school, versus loading them all into your backpack and then carry them “in parallel”). For each of your activities, discuss if they are already working in parallel, but if not, why they are not.

6.1.2 Next, consider which of the activities could be carried out concurrently (e.g., eating breakfast and listening to the news ). For each of your activities, describe which other activity could be paired with this activity.

6.1.3 For 6.1.2, what could we change about current systems (e.g., showers, clothes, TVs, cars) so that we could perform more tasks in parallel?

6.1.4 Estimate how much shorter time it would take to carry out these activities if you tried to carry out as many tasks in parallel as possible.

A.8 [5] Using SPIM, write and test a program that reads in a positive integer using the SPIM system calls. If the integer is not positive, the program should terminate with the message “Invalid Entry”; otherwise the program should print out the names of the digits of the integers, delimited by exactly one space. For example, if the user entered “728,” the output would be “Seven Two Eight.”

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