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- Path: mail2news.demon.co.uk!tsys.demon.co.uk
- From: Tom Wheeley <tomw@tsys.demon.co.uk>
- Newsgroups: comp.lang.c
- Subject: Re: 16bit vs. 32bit
- Date: Sun, 24 Mar 96 21:22:56 GMT
- Organization: City Zen FM
- Message-ID: <827702576snz@tsys.demon.co.uk>
- References: <4iui27$egk@news.netam.net> <4iunpm$c0n@crl.crl.com>
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- In article <4iunpm$c0n@crl.crl.com> bobfry@crl.com "Robert Fry" writes:
-
- > bgc@alpha.netam.net (The Bowling Green Connection) writes:
- >
- > >Could someone explain, technically, what 16bit and 32bit refers to?
- >
- > These are topics related to the Intel CPUs. You might get more
- > information from one of the msdos-specific or intel-specific newsgroups
- > (depending on your needs), but they refer to the two modes that have been
- > available on the 286, 386, 486, and Pentium. In 'protected' mode (or
- > 32-bit mode), pointers are 32 bits long, with an optional 16 bit segment
-
- No.
-
- Protected Mode does not imply 32 bit. Think about it: the 286 had protected
- mode. f.e. Borland Pascal _only_ has 16 bit protected mode -- with the
- ensuing 64Kb problems.
-
- Oh, and 16/32 bit is not an Intel-ism. Just that the most fuss has been over
- the incredibly slow transition from 16 -> 32 bit in the PC world.
-
- > compile-time switch. (Don't mix modes!). Windows NT (and Windows 95, I
- > think) use protected mode for their code and libraries. Windows 3.x uses
- > real (16 bit) mode. And the switch between the two modes is very slow.
-
- Windows 3.0 can run in real mode all the time. NT is fully 32 bit, but
- Windoze 95 still has large chunks of 16 bit code slowing it down with mode
- switches.
-
- .splitbung
- --
- * TQ 1.0 * The 'Just So Quotes'.
- "Indeed, it would not be an exaggeration to describe the history
- of the computer industry for the past decade as a massive attempt
- to keep up with Apple." Byte 12/94
-