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- Newsgroups: comp.sys.amiga.games
- Path: sparky!uunet!munnari.oz.au!uniwa!cujo!pride!copes
- From: copes@pride.cs.curtin.edu.au (Simon Cope)
- Subject: Re: A3000 games
- Message-ID: <copes.715331404@pride>
- Summary: Re: A3000 games, Roms, Bootroms.
- Keywords: A3000 games roms
- Sender: news@cujo.curtin.edu.au (News Manager)
- Organization: Curtin University of Technology
- Date: Tue, 1 Sep 1992 07:10:04 GMT
- Lines: 26
-
-
- All A3000 owners note:
- Also, you may have some problems with games when using 2.04 roms instead of
- boot roms and a kickfile. The symptoms include scrambled graphics, very slow
- screen updates etc. This is caused by the games code writing off into space
- randomly (crappy code) and hitting fat busters bus timeout (intended for slow
- zorro cards). Fat Buster has a 200ms (I think) timeout for the access, before
- signalling a buss error to the cpu. This is why some games mess up. It is
- better with boot roms, because they map out much of the memory map with the mmu
- thus terminating the access before it hits the external buss (and the timeout).
-
- As an example of this, Alien Breed runs fine on a friends 3000 with boot roms,
- but screws up with mine with 2.04 roms. Agony messes up on both machines,
- because the boot roms map some of the reserved areas as transperent.
-
- I am currently making an A3000 compatible version of SetCPU to fix this up,
- and to perform a number of other useful things like disabling fast ram, cache
- inhibit on reboot etc. When it is finished, I will make it available (with
- Dave Haynies permission). Currently there are only 2 games I cannot get to
- work properly.
-
- --
-
- copes@cs.curtin.edu.au
-
-
-