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Re: RamFAST & GS/OS cache

Subject: Re: RamFAST & GS/OS cache
From: David.Empson@bbs.actrix.gen.nz
Date: Mon, 23 Nov 1992 11:38:09 GMT
Newsgroups: comp.sys.apple2
Organization: Actrix Information Exchange
References: <fmlin.2ami@terapin.com> <uerics.722403504@mcl>
Sender: David.Empson@actrix.gen.nz (David Empson)

In article <uerics.722403504@mcl> uerics@mcl.ucsb.edu (Eric D. Shepherd) writes:
> The GS/OS cache caches _everything_.  Every block read from a cacheable
> device is cached.

Not necessarily.  GS/OS will cache all directory blocks.  Data blocks
are only cached if the GS/OS Read call specifies a cachePriority of 1.

Some devices are never cached (e.g. 5.25" drives).  The device driver
implements the caching, but it is requested by the application (for
data blocks).
-- 
David Empson

Internet: David.Empson@bbs.actrix.gen.nz    EMPSON_D@kosmos.wcc.govt.nz
Snail mail: P.O. Box 27-103, Wellington, New Zealand

References:
- RamFAST & GS/OS cache
  - From: fmlin@terapin.com (Frank M. Lin)
- Re: RamFAST & GS/OS cache
  - From: uerics@mcl.ucsb.edu (Eric D. Shepherd)

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