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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

Systems Architecture
Systems Architecture
7th Edition
ISBN:9781305080195
Author:Stephen D. Burd
Publisher:Stephen D. Burd
Chapter6: System Integration And Performance
Section: Chapter Questions
Problem 15VE
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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

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: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
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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