Computer system architecture, Basic Computer Science

Assignment Help:
1.
Suppose that the meaning of the BUN instruction of the Basic Computer is changed to implement the relative addressing mode, i.e PC <- PC + AR instead of PC<- AR.

a) Write an optimal operation sequence to implement the new version, but make sure that the value of AC is not changed at the end of your implementation.
b) Is it possible to write an operation sequence to implement the new version such that, at the end of the implementation, the values AC and DR are unchanged? If yes, write such an optimal sequence. Otherwise justify why it is not possible.

2.
Write an optimal sequence of control microinstruction to implement the following register transfer:

x: AR<- AR +DR, DR <- DR + 1

Your solution should use the minimum number of cycles and it should leave AC unchanged: You may assume that AC contains an 11-bit quantity.

3.
Archie Tecture has to write Basic Computer code that contains lots of "spinning loops" of the form:
Loop: ISZ A
BUN loop
Other code….

He believes that all his "spinning loops" will run faster if he reimplements them once he makes the following changes to the basic computer.

- Add a register to the bus system CTR(count register) to be selected with S1=0
- Replace the ISZ instruction with an instruction that loads a value into CTR:
LDC Address CTR<- M[Address]
- Add a register reference instruction ICSZ with the semantics: Increment CTR and skip next instruction if zero.

Answer the following:

a) Using as a model table 5-6, write the register transfer statements for the new instruction ICSZ and LDC
b) Is Archie correct assuming that all his "spinning loops" will run faster once he reimplements them using the next instruction? Justify carefully your answer.

4.

Most machines have a shift left unit attached to the ALU. Using 4x1multiplexors and D-flip-flops, design a 4-bit shifter that accommodates these four operations: no shift, Circular shift left, logical shift right, and Circular shift right. The most significant bit is the sign bit.

Related Discussions:- Computer system architecture

Explain kinematics modeling in virtual reality, Question 1 How can you cre...

Question 1 How can you create surface with 3D Scanner in geometric modeling? Question 2 Explain kinematics modeling in virtual reality Question 3 Describe object hierarc

Computer, hitory and genration of computer

hitory and genration of computer

Pep8, Write an Assembly program that reads an integer (-32,768 through 32,7...

Write an Assembly program that reads an integer (-32,768 through 32,767) in decimal and prints its equivalent in binary. The output must show all 16 bits. And you must use a loop

Explain actual process of ftp applications, Question 1 How do you inse...

Question 1 How do you insert Image source code in HTML Question 2 Explain actual process of FTP applications Question 3 Write a short note on TIFF BMP

Explain the process of fetching a word from the memory, Question 1 Explain...

Question 1 Explain the functional units of a basic computer with a neat diagram Question 2 Explain how you can get 1's complement of a given binary number? Also explain 1'

Breadth first search - artificial intelligence, Breadth First Search - arti...

Breadth First Search - artificial intelligence: Given a set of operators o1, ..., on in a breadth primary search, every time a new state s is reached, an action for every  oper

Create a queue, QUESTION (a) Give the representation of a queue as an a...

QUESTION (a) Give the representation of a queue as an abstract data type. (b) What is a priority queue? Give two types of priority queues. (c) The following program does

How to find percentage in c++, I have written all formulas fine but still i...

I have written all formulas fine but still its showing 0 as percentage please help me in this program user have to enter obtain score and total score

Macro Libraries, One of the facilities that the use of macros provides is t...

One of the facilities that the use of macros provides is the formation of libraries, which are sets of macros which can be included in a program from a different file. The formatio

OPERATING SYSEMS, Design an ER diagram for an IT training group. The compan...

Design an ER diagram for an IT training group. The company has 12 instructors and can handle upto 100 trainees for each training section. The company offers 5 advanced technology c

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd