64 Bit
 

* 1.&lt architecture&gt A term describing a computer architecture based around an ALU, registers, and data bus which are 64 bits wide.
64-bit processors are quite common in 1996, e.g. Digital Alpha, versions of Sun SPARC, MIPS, IBM AS/4000. the PowerPC and Intel are 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 are 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 1986 there are 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.
(1996-12-23)
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