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Re: The truth about 256 colour screen modes on the Archimedes

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In message <6a280e48-7eb9-46d8-bdb7-ef2085f7627b@n12g2000yqh.googlegro 
ups.com>
          Xavier <xltardy@gmail.com> wrote:

> On 23 août, 08:58, Xavier <xlta...@gmail.com> wrote:
>> Hello.
>>
>> I'm speaking here about the pre RISC PC series, with the 1st VIDC, so
>> yes that's the good old Archimedes series and the A30x0 series.
>> [...]
>
> I see !InterGif (http://utter.chaos.org.uk/~pdh/software/intergif.htm)
> as a solution with its 'Find best' option (see
> http://utter.chaos.org.uk/~pdh/software/intergif/desktop.htm) to
> generate the most accurate 256 colour palette, from a given sprite.

InterGIF[1] knows nothing about VIDC1 palette limitations. It simply 
generates a full palette of the requested size with arbitrary colours. 
Such a palette is not suitable for VIDC1 machines. Some extra hardware 
(e.g., ColourCard) or a later machine (RiscPC upwards) would be needed 
to use it.

In a desktop environment it is not very common to change the screen 
palette anyway. The OS (more accurately, the ColourTrans module) 
performs the job of mapping arbitrary colour information to the 
currently chosen screen palette.

On modern machines there is not much use for modes with palettes 
anyway. Most Iyonix computers probably run in a 16 million colour mode 
all the time.

[1] Just as an aside, InterGIF 6.17b (the most recent version) is at
    http://www.mw-software.com/software/freeware.html

-- 
Martin
---------------------------------------------------------------------
Martin Wuerthner         MW Software      http://www.mw-software.com/
        RISC OS Software for Design, Printing and Publishing
---------------------------------------------------------------------

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The truth about 256 colour screen modes on the Archimedes Xavier <xltardy@gmail.com> - 2011-08-22 23:58 -0700
  Re: The truth about 256 colour screen modes on the Archimedes Xavier <xltardy@gmail.com> - 2011-08-23 01:09 -0700
    Re: The truth about 256 colour screen modes on the Archimedes Martin Wuerthner <spamtrap@mw-software.com> - 2011-08-23 12:08 +0200
  Re: The truth about 256 colour screen modes on the Archimedes Theo Markettos <theom+news@chiark.greenend.org.uk> - 2011-08-23 15:58 +0100
    Re: The truth about 256 colour screen modes on the Archimedes druck <news@druck.org.uk> - 2011-08-23 23:04 +0100
      Re: The truth about 256 colour screen modes on the Archimedes Steffen Huber <spam@huber-net.de> - 2011-08-24 15:25 +0200
        Re: The truth about 256 colour screen modes on the Archimedes Theo Markettos <theom+news@chiark.greenend.org.uk> - 2011-08-24 15:54 +0100
          Re: The truth about 256 colour screen modes on the Archimedes Theo Markettos <theom+news@chiark.greenend.org.uk> - 2011-08-30 17:28 +0100
            Re: The truth about 256 colour screen modes on the Archimedes druck <news@druck.org.uk> - 2011-08-31 18:24 +0100
        Re: The truth about 256 colour screen modes on the Archimedes John Greenwood <newsgroups.86z@john-greenwood.co.uk> - 2011-08-26 09:17 +0100
          Re: The truth about 256 colour screen modes on the Archimedes Xavier <xltardy@gmail.com> - 2011-08-26 11:17 -0700
  Re: The truth about 256 colour screen modes on the Archimedes chrisbazley@bigfoot.com - 2011-09-03 02:03 -0700
    Re: The truth about 256 colour screen modes on the Archimedes xltardy@gmail.com - 2013-12-29 12:03 -0800

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