Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!sdd.hp.com!usc!ucselx!crash!jcs From: jcs@crash.cts.com (John Schultz) Newsgroups: comp.sys.amiga.graphics Subject: Re: So, does *anyone* make 1024x768 x256 for the A3000? Message-ID: <8862@crash.cts.com> Date: 27 Apr 91 00:20:24 GMT References: <15230@helios.TAMU.EDU> <1991Apr24.162452.22106@hubcap.clemson.edu> <15250@helios.TAMU.EDU> <1991Apr24.211729.19270@bronze.ucs.indiana.edu> Organization: Crash TimeSharing, El Cajon, CA Lines: 31 In frank@morpheus.UUCP (Frank McPherson) writes: [stuff deleted] >>>Yes, 24 bitplanes, SO??? >>>Yes, 24 bitplanes, SO??? >> >>I think you mean 24 bits of information or a 24-bit plane, (i.e. 24 >>bits of information for each pixel) and not 24 planes per se. >> >I think you're right about that. Think about it. A quick calculation >tells you that a 640x400 pixel image with 24 bitplanes would occupy SIX >megabytes (6,144,000 bytes, to be exact) of storage. Likewise, a >1024x768 image which had 24 bitplanes would occupy 18,874,368 bytes. Not >something you'd be able to display on your average Amiga 3000. What? 1024x768x24 = 2,359,296 bytes of storage. 24 bits = 3 bytes. >"24 bit graphics" does not imply 24 bit planes. I'm sure someone will >correct me if I'm wrong, but I think that with normal 24 bit graphics >boards, they allow you to choose 256 colours (8 bitplanes) from a >palatte of 16 million (approx. 2^24). 24 bit graphics means 24 bit graphics. You can conceptualize however you like: 24 bitplanes or 24 bits per pixel (3 bytes per pixel). The Amiga is bitplane oriented. The TMS34010 is a packed pixel (a bit addressable processor as well). John