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| From: indi (all posts)
Date: 2000-10-22
Subject: Re: 2 Things
|
On Sun, 22 Oct 2000 20:08:34 +0200, you wrote:
>Hi All,
>
>I have a question about the lower 3 bits of the TED register at $FF1F...
>It is called bitmap reload AFAIK, and shows me the current scanline within
>a character... It is writable, and a few games (and demos) use it for smooth
>scrolling.
>I don't know though how it works exactly... when I write $00 into it,
>does TED refetch the character memory? similarly writing $07 causes the
>same for color data? What if I write other values in between?
Mmmm... Good point... does this mean you can get HIRES colour?!?!?!?
Sort of line the spectrum... keep reloading the new attribute each scanline..?
You would have to rewrite the character data too I'd guess.. but for small logos... hay.. that'd be neat..
Anyone wanna prove me wrong? :-)
On the subject ofthe question... whatever line you write... the TED continues drawing the character from THAT point... keep putting the same one in, and it'll keep drawing the same line of those characters.
Stretchy scroll anyone?
Mike
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