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Published in:
1981 | OriginalPaper | Chapter
Decimal arithmetic
Author : Roger Hutty
Published in: Z80 Assembly Language Programming for Students
Publisher: Macmillan Education UK
Included in: Professional Book Archive
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Up to now, we have only considered the binary representation of numbers in the Z80 microprocessor, and arithmetic has involved signed and unsigned binary numbers. However, the Z80 microprocessor caters for another representation of numbers — Binary Coded Decimal, or BCD for short.