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.