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- Path: sparky!uunet!mcsun!sun4nl!hacktic!blackhl!disaster!rico
- From: rico@disaster.hacktic.nl (Rico Jansen)
- Newsgroups: comp.sys.amiga.hardware
- Subject: Re: address range of 2.0 kick
- Message-ID: <rico.007p@disaster.hacktic.nl>
- Date: 19 Aug 92 17:55:38 MET
- References: <1992Aug17.165055.9669@mcshh.Hanse.DE> <MT87692.92Aug18133917@korppi.cs.tut.fi>
- Distribution: world
- Organization: Disaster Area
- Lines: 16
-
- >The space from $F00000 to $FFFFFF is Reserved so this probably means we
- >can have 1M ROM at maximum with current configuration.
-
- True but not with the current hardware, on the A500 and A2000 the rom
- socket only contains sufficient addresslines to decode 512Kb.
- So to get 1MB you would have to pick up an extra addressline somewhere else.
-
- >Actually the exec at $FC0000 first checks if there is rom at $F00000 and
- >if there is the execution continues from there.
-
- It seems Commodore has some foresight. In the schematics there was
- already room for 512Kb ROM when only 256Kb where used, and know
- exec knows about 1MB ROM's when only 512Kb are used.
-
- --
- Rico Jansen (rico@disaster.hacktic.nl)
-