[Color Computer] Re: [Coco] Hidden 256-color mode
jdiffendaffer at yahoo.com
Wed Jul 27 15:38:33 EDT 2005
Just a small observation here. If the display hardware can handle
intensity why not support YY in the palette registers?
Hmmmm... was another 128 bits of storage and loading the YY value
rather than having fixed YY values really that much of a space saver
on the chip?
--- In ColorComputer at yahoogroups.com, "James Diffendaffer"
<jdiffendaffer at y...> wrote:
> > Since the CoCo 3's palette entry format is really XXRGBRGB then
> > YYRGBRGB makes sense, giving a total of 16 colors out of 256 if the
> > upper two bits are put to use for the intensity.
> Excellent point on the palette format but isn't that 64 colors rather
> than 16 (4 bits = 16 colors, 6 bits = 64)?
> It's probably going to have to match the palette data since it's
> bypassing the palette lookup hardware unless they want to modify the
> bits. Changing the order of the lines to go from YYRRGGBB to YYRGBRGB
> doesn't require gates but it makes sense to directly output data in
> the same format anyway.
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