Path: utzoo!attcan!uunet!lll-winken!lll-lcc!ames!oliveb!amiga!boing!dale
From: dale@boing.UUCP (Dale Luck)
Newsgroups: comp.sys.amiga.tech
Subject: Re: Chip RAM
Message-ID: <342@boing.UUCP>
Date: 16 Jul 88 17:27:09 GMT
References: <3150@polya.Stanford.EDU> <6428@well.UUCP> <2242@sugar.UUCP> <735@applix.UUCP> <11717@agate.BERKELEY.EDU> <2327@antique.UUCP> <737@applix.UUCP> <2333@antique.UUCP> <4790@killer.UUCP> <4266@cbmvax.UUCP> <4270@cbmvax.UUCP>
Reply-To: dale@boing.UUCP (Dale Luck)
Organization: Boing, Milpitas, Ca.
Lines: 22

In article <4270@cbmvax.UUCP> carolyn@cbmvax.UUCP (Carolyn Scheppner CATS) writes:
=Currently, since all CHIP mem is mapped in 1st meg of address space,
=ignoring the pieces Exec removes from the memlists at the start and 
=end for its own devious purposes, the first 1/2 meg of CHIP is from
=$0 to $7FFFF, and the second 1/2 meg is from $80000 to $FFFFF.
=
=You'l have to pick some addresses within the second 1/2 meg range to
=try TypeOfMem() on, low enough to avoid system stack and possible
=3rd party high-chip memlist removals.
=
=You could just check $80000, but remember that this will not tell
=you if this RAM is free.  Just that it exists.
=

However $80000 may in some future machine no longer be chip memory.
Moving the base address of chip memory from 0 tnd start it a 1m
would provide alot of benefits for 68000 users if we also put some
standard fast memory at location 0.
-- 
Dale Luck     Boing, Inc. {cbmvax|oliveb|pyramid}|!amiga!boing!dale
Although I do contract work for Amiga-LosGatos, my opinions probably
don't represent those of Commodore or its management or its engineers,
but I think the world would be a better place if they did.