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Message from discussion ULA Replacement for ZX Spectrum SE
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Vlada Stepanovic  
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 More options May 15 2000, 3:00 am
Newsgroups: comp.sys.sinclair
From: "Vlada Stepanovic" <pp...@soyaprotein.com>
Date: 2000/05/15
Subject: Re: ULA Replacement for ZX Spectrum SE
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"Andrew Owen" <ao...@brandnewco.org> wrote in message

news:B545AA0C.233%aowen@brandnewco.org...

> Those who have been following my posts over the last few months will know
> that I have been slaving away on a new ROM set for the Spectrum. I still
> need help but it is nearing completion. Anyway, rather than wait for
someone
> to create a magnificent new machine I have decided to do it myself (if
only
> in emulation to begin with). Here's the spex:

> Bugfixed ROM set which is more compatible with the 48 than any other 128.
> 128k RAM, expandable to 512k, paged exactly the same as the Scorpion.
> 7.08Mhz processer, switched exactly the same as the Scorpion.
> 16 channel sound - handled by a GM-MIDI card plugged into the MIDI out.

> There will be no contended memory and the ULA replacement will allow
palette
> switching to achieve a true 16-32 colours on screen from a palette of
around
> 4,096 colours. What I need to know is, are there any OUT addresses free to
> do this. What sort of palette range do people want. How should the palette
> be handled....

  I just wonder how you think to write new ROM, if you didn't solved those
primary questions  about hardware ???

  Btw. there are still some free OUT adresses, but not much, sadly.

    PP


 
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