翻訳と辞書
Words near each other
・ 51forth
・ 56 kbps
・ 56k line
・ 586
・ 5ess switch
・ 5nf
・ 5th glove
・ 6.001
・ 610
・ 6309
64-bit
・ 6501
・ 6502
・ 650x
・ 6510
・ 65816
・ 6800
・ 68000
・ 68020
・ 68030


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64-bit : FOLDOC
64-bit
A term describing a computer architecture based around an ALU, registers and data bus which are 64 bits wide.
64-bit processors were quite common in 1996, e.g. Digital Alpha, versions of Sun SPARC, MIPS, IBM {AS/4000}. the PowerPC and Intel were expected to move to 64 bits at their next generation - {PPC 620} and {Intel P7}.
A 64-bit address bus allows the processor to address 18 million gigabytes as opposed to the mere 4 gigabytes allowed with 32 bits. There were in 1996 already hard disks which can hold over 4GB. Floating point calculations can also be more accurate.
A 64-bit OS is needed as well to take advantage of the CPU. In 1996 there were only a few 64-bit operating systems, including {OS/400}, Digital Unix, Solaris (partialy). A 32-bit OS can run on a 64-bit CPU.
(2004-05-12)



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