Article View: comp.sys.amiga.tech
Article #13345Re: Chip memory bandwidth, graphics modes
From: Checkpoint Technologies
Date: Fri, 05 Jan 1990 16:21
Date: Fri, 05 Jan 1990 16:21
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1251 bytes
In article <9213@cbmvax.commodore.com> daveh@cbmvax.commodore.com (Dave Haynie) writes: > >... Color registers have always run at the 320 pixel/15 kHz >dot rate. When you're in a 640 pixel/15 kHz dot rate, the 32 lores color >registers magically become 16 hires color registers; eg, they're multiplexed. Lemme get this straight: you say the color palette halves are multiplexed, making an effective 16 color palette entries from the 32, when the Amiga is in hi res? I could understand this, but I would expect to see certain side-effects. Alternate high-res pixels would address alternate halves of the color palette (but they don't). And sprite zero would appear to use color registers 1-3 (but it doesn't). So I can't figure out what you really mean when you say they're multiplexed.
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!ames!haven!grebyn!ckp From: ckp@grebyn.com (Checkpoint Technologies) Newsgroups: comp.sys.amiga.tech Subject: Re: Chip memory bandwidth, graphics modes Message-ID: <14122@grebyn.com> Date: 5 Jan 90 16:21:42 GMT References: <14120@grebyn.com> <9213@cbmvax.commodore.com> Reply-To: ckp@grebyn.UUCP (Checkpoint Technologies) Organization: Grebyn Timesharing, Vienna, VA, USA Lines: 14