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- Xref: sparky comp.sys.amiga.games:17220 comp.sys.amiga.hardware:22057 comp.sys.amiga.misc:19049
- Newsgroups: comp.sys.amiga.games,comp.sys.amiga.hardware,comp.sys.amiga.misc
- Path: sparky!uunet!gatech!destroyer!ncar!noao!coyote!bbs
- From: cobra@coyote.datalog.com (Ken Thompson)
- Subject: Re: Amiga 500 memory hack and some games
- Message-ID: <Z9o0VB1w165w@coyote.datalog.com>
- Sender: bbs@coyote.datalog.com (Waffle System)
- Organization: Datalog Consulting, Tucson, AZ
- References: <1992Dec17.233544.11680@bnr.ca>
- Date: Thu, 24 Dec 92 03:43:29 GMT
- Lines: 36
-
- mascot@bnr.ca (Scott Mason) writes:
-
- > [ bandwith-reduction deletia ]
- >
- > 3. When an A501 is providing FAST memory, the memory is mapped to
- > C00000. When it is providing CHIP memory, the memory is remapped to
- > 080000 in order to be next to the existing CHIP memory in the address
- > space. Unfortunately, you now have no memory at C00000. The fix is to
- > install a switch to allow you to choose between A501 as CHIP and A501
- > as FAST when you boot. I don't know where that switch would go, and it
- > probably varies with motherboard revision. The dealer who made the
- > original mods should know.
-
-
- As I am only a day or two away from performing this surgery myself, from
- the information that I have on this mod; it *does* seem like it might be
- a GOOD THING if you are really into games, and/or older non-OS compliant
- software, to add a switch in order to reconfigure it all to an original
- condition.
-
- I think that I am going to make the 1 meg change, then try most
- everything I now have...if something breaks, then it'll be stuck on a
- list...if the list gets over three items long, then I'll rig up a switch,
- and (hopefully) find a place on the rear panel of my A500 for it to
- reside...
-
- I recall once seeing a file that really had this laid out quite
- well...had options for switches...showed how to wire 'em and everything.
-
- Now, wonder if I could find that...
-
-
- _____ ______________________ _____
- |/ | | cobra@datalog.com | | /\
- |\ en |hompson | cobra@jab.tus.az.us | |ucson, /--\rizona
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