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- Newsgroups: comp.sys.ibm.pc.hardware
- Path: sparky!uunet!mcsun!sunic!psinntp!psinntp!tandon!tdbear
- From: tdbear@tandon.com (Tom Barrett)
- Subject: Re: Help - Cyrix processors, anyone know for sure?
- Message-ID: <1992Aug18.171509.14657@tandon.com>
- Organization: Tandon Corporation, Moorpark, CA
- References: <0105010F.b54s7l@mprnews.mpr.com> <4184@news.chips.com>
- Date: Tue, 18 Aug 1992 17:15:09 GMT
- Lines: 24
-
- In article <4184@news.chips.com> markst@chips.com (Mark Storkamp) writes:
- >Just one problem with that approach, though. If any software does a
- >shutdown to get out of protected mode, the cache will be disabled.
- >You really should upgrade your BIOS if one is available.
-
- This needs to be qualified... only a 286-compatible shutdown
- will turn off the cache (ie. one which uses the RC port from
- the keyboard controller or a "fast" reset command). Most
- "modern" software recognizes the 386/486 and uses the special
- features of the 386 to exit protected mode (much, much
- faster!).
-
- Do you know of any programs which use just the 286 compatible
- shutdown? I had a heated discusssion with our software
- director about this (we compromised to reprogram the Cyrix but
- not the other CPUs like the 486), but he killed me with the
- question of which programs use this method of escape... all
- the ones I could name pre-dated the 386 migration.
-
- --
- Tom Barrett (TDBear) tdbear@tandon.com voice 805-378-6207
- Tandon Corporation tdbear@p6.f1006.n102.z1.fidonet.org fax 805-529-8895
- Sr. HW Design Engineer "War is Peace, No is Yes, And We're All Free!"
- [The views expressed herein may not be shared by the organization of origin]
-