F2 F1 FO Functionality 0 0 0 ADD the value on the A bus to the value on the B bus 0 0 1 AND the value on the A bus to the value on the B bus 0 1 0 0 1 1 LEFT SHIFT the value on the B bus by the number of bits specified on the A bus RIGHT SHIFT the value on the B bus by the number of bits specified on the A bus INCREMENT the value on the A bus by 1 1 0 0 1 0 1 IF DO = 1 THEN B ELSE O 1 1 0 SET output of the ALU to 0 1 1 1 SET the output of the ALU to the value on the B bus Table 1: ALU functions _ C0=1, C1=1 B0=1, B1=1 D3 CO=1, C1=0 D2 12 B0=1, B1=0 CO=0, C1=1 D1 B0=0, B1=1 C0=0, C1=0 DO 80 C A B F2 8-bit ALU Figure 1: 8-bit data-path FO
F2 F1 FO Functionality 0 0 0 ADD the value on the A bus to the value on the B bus 0 0 1 AND the value on the A bus to the value on the B bus 0 1 0 0 1 1 LEFT SHIFT the value on the B bus by the number of bits specified on the A bus RIGHT SHIFT the value on the B bus by the number of bits specified on the A bus INCREMENT the value on the A bus by 1 1 0 0 1 0 1 IF DO = 1 THEN B ELSE O 1 1 0 SET output of the ALU to 0 1 1 1 SET the output of the ALU to the value on the B bus Table 1: ALU functions _ C0=1, C1=1 B0=1, B1=1 D3 CO=1, C1=0 D2 12 B0=1, B1=0 CO=0, C1=1 D1 B0=0, B1=1 C0=0, C1=0 DO 80 C A B F2 8-bit ALU Figure 1: 8-bit data-path FO
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
Related questions
Question
Using Logism Diagrams would be helpful aswell The Arithmetic Logic Unit The most important and possible most difficult component to implement is the arithmetic logic unit. The
functions of the ALU are shown in Table 1. The ALU should have 5 inputs (A-input, B-input, F0-input, F1-input, Finput) and 1 output (C-output). You will need to determine how many bits each input and output should have.
Remember, you are designing an 8-bit microprocessor! . For example, to add the value on the A-bus
8-bit ALU
to the value on the B-bus, you can simply use an 8-bit adder. Explore the components in Logisim! Additionally,
you can think about using a multiplexer to determine which ALU function will be performed
Transcribed Image Text:F2
F1
FO
Functionality
0
0
0
ADD the value on the A bus to the value on the B bus
0
0
1
AND the value on the A bus to the value on the B bus
0
1
0
0
1
1
LEFT SHIFT the value on the B bus by the number of bits specified on
the A bus
RIGHT SHIFT the value on the B bus by the number of bits specified on
the A bus
INCREMENT the value on the A bus by 1
1
0
0
1
0
1
IF DO = 1 THEN B ELSE O
1
1
0 SET output of the ALU to 0
1
1
1
SET the output of the ALU to the value on the B bus
Table 1: ALU functions
Transcribed Image Text:_ C0=1, C1=1
B0=1, B1=1
D3
CO=1, C1=0
D2
12
B0=1, B1=0
CO=0, C1=1
D1
B0=0, B1=1
C0=0, C1=0
DO
80
C
A
B
F2
8-bit ALU
Figure 1: 8-bit data-path
FO
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