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Erschienen in:
1981 | OriginalPaper | Buchkapitel
16-bit and multiple byte arithmetic
verfasst von : Roger Hutty
Erschienen in: Z80 Assembly Language Programming for Students
Verlag: Macmillan Education UK
Enthalten in: Professional Book Archive
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So far we have been concerned with 8-bit arithmetic — that is, 8-bit operands and 8-bit results. The range of numeric values which can be manipulated by 8-bit arithmetics is small and so we may need to use 16-bit arithmetic and more. The Z80 microprocessor has instructions which allows 16-bit arithmetic to be performed directly. These instructions can also be used to provide 32-bit arithmetic, 48-bit arithmetic and so on. The 16-bit arithmetic instructions also allow additional loop facilities.