Article View: comp.sys.mac
Article #6029Re: moving video ram on the IIci
From: Noah Price
Date: Mon, 09 Oct 1989 05:22
Date: Mon, 09 Oct 1989 05:22
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1274 bytes
In article <986@babbage.acc.virginia.edu> pts@watt.acc.Virginia.EDU (Paul T. Shannon) writes:
>My question: can the video hardware be told to look at _different_
>addresses in system RAM when it goes to refresh the screen?
Nope, as you say:
> [...] is there just one address in system RAM where the
>video hardware always looks?
The video hardware always gets its data starting at the base of Bank A
of DRAM. This is why you must have memory in Bank A in order to use built-in
video.
noah price Mac IIci Hardware Design Team
Apple Computer, Inc.
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!wuarchive!gem.mps.ohio-state.edu!apple!noah From: noah@Apple.COM (Noah Price) Newsgroups: comp.sys.mac Subject: Re: moving video ram on the IIci Summary: Video comes from a fixed place in memory Keywords: IIci video Message-ID: <35380@apple.Apple.COM> Date: 9 Oct 89 05:22:38 GMT References: <986@babbage.acc.virginia.edu> Followup-To: comp.sys.mac Distribution: usa Organization: Apple Computer Inc, Cupertino, CA Lines: 17