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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 Pine.OSF.4.05.10005151322300.10187-100...@cpca4.uea.ac.uk,
Equin0x at y9827...@cpca6.uea.ac.uk wrote on 15/5/00 1:31 pm: >> 16 channel sound - handled by a GM-MIDI card plugged into the MIDI out. All 16 channels are supported by 128 BASIC as standard. > Nice! Can you PLAY a$, b$,..., o$ ? >> Should we sacrifice FLASH to get 32 colours on screen? Good. I don't mind the Manic Miner loading screen looking a bit strange if > Yes. Nobody's used FLASH seriously since 1983. you don't. For most games an acceptable compromise could be reached by having the colours used by FLASH act the same as if INVERSE had been selected. > Would the FLASH command in BASIC work for accessing the extra colours? Yes. >> How should the palettes be selected (OUT commands etc?) Actually there is one unused system variable (the one that's supposed to be > System variables? (I know there aren't technically any unused ones, but > since it's a custom ROM, there might be.) unused in the manual but actually isn't) except that you can't use it because lots of programs already use it because they think it's unused (if you see what I mean. Hmm, "They think it's unused... it is now!" >> How big should the palette be? >> 3 bits per channel = 512 That would require a total of 14-bits for 32 colours from 512, (two bytes) >> 4 bits per channel = 4,096 >> [...] >> I personally think 4,096 colours is plenty. > I think 512 is enough. But to be honest if we're going to have 32 colours you really need a palette of 4,096 so you can get a reasonable spread of mid-tones, unfortunately that uses 17-bytes but I'll think of a solution. >> [new chars] Of course it means I'll have to write a new font editor since you now have > Using OVER for the accents is great. I never liked the idea of having > separate characters for e', e`, etc., even though ANSI did it. 104 characters instead of 96 to play with. -Andrew You must Sign in before you can post messages.
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