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From: urban@cbnewsl.att.com (john.urban)
Newsgroups: comp.unix.sysv386
Subject: Re: Is >16MB possible on ISA box (ISC 2.2.1)?
Message-ID: <1991May13.134436.10361@cbnewsl.att.com>
Date: 13 May 91 13:44:36 GMT
References: <1991May9.183908.9194@aai.com> <1991May11.131528.17370@virtech.uucp> <1991May13.004012.18572@pegasus.com>
Distribution: usa
Organization: AT&T Bell Laboratories
Lines: 18

In article <1991May13.004012.18572@pegasus.com> richard@pegasus.com (Richard Foulk) writes:
	DELETED STUFF
>						I've seen people
>reporting 24 megs and more, in this forum, on ISA bus machines.
>
>So what is the real situation today?  Which 386 ports of Unix will support
>greater than 16 megs on the ISA bus?  (Did the MEMRANGE spec actually
>vaporize with ISC's 2.2, or is it just hiding somewhere else?)

AT&T UNIX System V/386 Release 3.2 Version 2.2 (and higher, ie 3.2 2.3 and 4.0)
support greater than 16 Meg on the ISA bus.  When more than 16 meg is available
it "moves" the DMA which would of occured above 16 meg to below 16 meg so that
the ISA bus (DMA chip) can do the DMA successfully.

Sincerely,

John Ben Urban
att!garage!jbu