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"