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From: renglish@hplabsz.HP.COM (Bob English)
Newsgroups: comp.arch
Subject: Re: 48-bit computers
Message-ID: <6684@hplabsz.HP.COM>
Date: 11 Mar 91 21:50:40 GMT
References: <666@spim.mips.COM>
Organization: HPLabs, Palo Alto CA
Lines: 15

In article <666@spim.mips.COM> mash@mips.com (John Mashey) writes:
>Various people asked about the existence of 48-bit computers.
>I don't know of any, offhand that are being sold today.

The PA-RISC architecture allows for 32-bit, 48-bit, and 64-bit
implementations.  I don't know of any that have actually been shipped
with more than 48-bits of supported address space.  Under HP-UX,
processes are limited to between 30 and 32 bits of local address space
(depending on how you count).  Under MPE-XL, the entire address space is
made available to tasks, and is used (among other things) to map file
system pages.

--bob--
renglish@hplabs
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