Path: utzoo!utgpu!water!watmath!clyde!bellcore!faline!thumper!ulysses!andante!princeton!udel!rochester!pt.cs.cmu.edu!andrew.cmu.edu!mp1u+ From: mp1u+@andrew.cmu.edu.UUCP Newsgroups: comp.sys.amiga Subject: Re: Ideas for New Custom Chips (a SERIOUS one!) Message-ID:Date: 12 Jul 88 18:21:16 GMT References: <3128@polya.Stanford.EDU> <14146@shemp.CS.UCLA.EDU>, <613@myrias.UUCP> Organization: Carnegie Mellon Lines: 26 In-Reply-To: <613@myrias.UUCP> > *Excerpts from ext.nn.comp.sys.amiga: 7-Jul-88 Re: Ideas for New Custom Ch..* > *Chris Gray@myrias.UUCP (1944)* > What I would like to see is a HAM mode that would work with 2, 3, 4, and 5 > bit deep displays as follows: (example for 5 bits/pixel) > 5-bits > 00000 - use same colour as previous pixel > xxxxx - select one of lower 32 colour table registers > (the 0th entry is not accessible, but is still used > as the border colour) > The same pattern holds for other depths - all bits zero means use the same > colour as the horizontally previous pixel. The Apple //gs has a mode very similar to this -- it is called "fill mode" or something like that. Basically, you can draw a line and the hardware will replicate that color across the scan line until it hits a non-background pixel or the screen border. --M Michael Portuesi / Information Technology Center / Carnegie Mellon University ARPA/UUCP: mp1u+@andrew.cmu.edu BITNET: rainwalker@drycas "if you ain't ill it'll fix your car"