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Message from discussion RFC: ULA Replacement for ZX Spectrum SE
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Matthew Westcott  
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 More options May 15 2000, 3:00 am
Newsgroups: comp.sys.sinclair
From: gas...@raww.org.RemoveThisBit.invalid (Matthew Westcott)
Date: 2000/05/15
Subject: Re: RFC: ULA Replacement for ZX Spectrum SE
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On 15 May 2000, Equin0x wrote this message in comp.sys.sinclair. Which was
nice.

>> How should the palettes be selected (OUT commands etc?)

>System variables? (I know there aren't technically any unused ones, but
>since it's a custom ROM, there might be.)

I think I'd prefer OUT commands. The process of choosing colours is
external to the ROM, and it would be nice to have it handled by OUTs in a
similar way to the sound chip or the border colour. On the other hand,
using memory locations would make colour cycling easier (only slightly
easier though).

Oh, and it should be possible to change the palette while the screen is
being drawn, so that clever people can get more than the usual number of
colours on-screen at once. I like gimmicks :-)

--
Matthew Westcott
http://www.demo.eu.org/ - the home of the Spectrum demo scene
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