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Newsgroups: comp.sys.sinclair
From: Andrew Owen <ao...@brandnewco.org>
Date: 2000/05/15
Subject: Re: RFC: ULA Replacement for ZX Spectrum SE
in article 8F359FDD9gasmanraww...@163.1.2.7, Matthew Westcott at
gas...@raww.org.RemoveThisBit.invalid wrote on 15/5/00 2:33 pm: >>> How should the palettes be selected (OUT commands etc?) I think using OUTs is also more practical from a hardware point of view but >> 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. I need to know which ones are not avaiable because they are already used by other hardware (such as the AY, disk interfaces etc.) > Oh, and it should be possible to change the palette while the screen is As the video will be handled by something other than the ULA taking info > being drawn, so that clever people can get more than the usual number of > colours on-screen at once. I like gimmicks :-) from the screen area to build the picture and OUTs to choose the palettes it should be possible to create a kind of hold and modify mode to get all 4,096 colours on screen with certain restrictions. -Andrew You must Sign in before you can post messages.
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