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Suppose that register B contains a twodecimal-digit BCD

Electrical Engineering: Principles & Applications | 6th Edition | ISBN: 9780133116649 | Authors: Allan R. Hambley ISBN: 9780133116649 150

Solution for problem P8.46 Chapter 8

Electrical Engineering: Principles & Applications | 6th Edition

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Electrical Engineering: Principles & Applications | 6th Edition | ISBN: 9780133116649 | Authors: Allan R. Hambley

Electrical Engineering: Principles & Applications | 6th Edition

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Problem P8.46

Suppose that register B contains a twodecimal-digit BCD number n. Write a subroutine called CONVERT that replaces the content of register B by its binary equivalent. The content of the other registers (except the program counter) should be unchanged at the completion of the subroutine. Memory locations $1A, $1B, and $1C can be used for temporary storage. [Hint: We need to separate the upper nibble (four bits) of n from its lower nibble. This can be achieved by shifting n four bits to the left, with the result appearing in the D register. Shifting by four bits to the left is accomplished by multiplying by 24.]

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Chapter 8, Problem P8.46 is Solved
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Textbook: Electrical Engineering: Principles & Applications
Edition: 6
Author: Allan R. Hambley
ISBN: 9780133116649

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Suppose that register B contains a twodecimal-digit BCD