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CSC258H1 (46)
Lecture

mar01ce.docx

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Department
Computer Science
Course
CSC258H1
Professor
Steve Engels
Semester
Winter

Description
 The Logic side of ALU o Multipcation for demicals vs. multiplication for binary o We also want a circuit that can perform logical operations, in addition to arithmetic ones o How do we tell which operation to perform?  Another select bit  If S2= 1, then logic circuit block is activated  Multiplexer is used to determined which block (logical or arithmetic) goes to the output o Accumulator circuits  What if you could perform each stage of the multiplication operation, one after the other  This circuit would only need a single row of adders and a couple of shift registers  Multiple Register X by C out of Register Y  Keep shifting left Register Y until all zeroes  Also shift adder to add into proper position in Register R  How wide does register R have to be?  Register X width + Register Y width o the Logic and Arithmatic circuit for a single ALU stage
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