Re: C128 technical

From: "John Selck" <selcc@xxxxxxxxxxx>
Date: Fri, 06 Jan 2006 00:03:27 +0100

On Thu, 05 Jan 2006 21:39:35 +0100, Christian Johansson <c64@xxxxxxxxxx> wrote:

How is 8x2 color pixels done? The VDC uses attribute memory for color
where each byte in the attribute memory corresponds to 8x8 pixels, not 8x2.


The VDC has registers to set the color cell height on a per pixel base.
Anything from 2 pixels to 16 pixels height is possible, and with a bit
trickery you can also do 8x1 color cells.

The ratio problem could perhaps be solved by using VDC interlace mode.
Then, you should be able to get 640x400 pixels instead of 640x200 but
the problem is the flickering in interlace mode.


You could also use the VDC's 40 character mode. It's a bit buggy though..

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  - From: John Selck
- Re: C128 technical
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