[Oberon] RGB display in Oberon RISC5

[Magnus Karlsson]

https://en.wikipedia.org/wiki/Additive_color

R   G   B         colour
0   0   0           black
0   0   1           blue
0   1   0           green
0   1   1           cyan
1   0   0           red
1   0   1           magenta
1   1   0           yellow
1   1   1           white

Magnus

On 4/19/2016 1:06 PM, thomas.kral at email.cz wrote:
> Magnus,
>
> That is great, now we can see Oberon is capable of supporting more colours, not sure how they are coded
>
> R   G   B         colour
> 0   0   0           black
> 0   0   1           ?
> 0   1   0           ?
> 0   1   1           ?
> 1   0   0           ?
> 1   0   1           ?
> 1   1   0           ?
> 1   1   1           white
>
> There are four bits used as you say,
>
> bit 3: not used
> bit 2 : R
> bit 1 : G
> bit 0 : B
>
> Many thanks
> Tomas
>
> ---------- Původní zpráva ----------
> Od: Magnus Karlsson
> Komu: oberon at lists.inf.ethz.ch
> Datum: 18. 4. 2016 22:29:54
> Předmět: [Oberon] RGB display in Oberon RISC5
>
> I have made an updated version of VID.v with support for an RGB video
> buffer.
>
> The video buffer is now 4x larger (about 40% of the total 1 MB RAM) and
> video refresh will use up about 40% of the memory bandwidth.
>
> See http://saanlima.com/forum/viewtopic.php?f=14&p=1786#p1783 for
> Verilog code and bit files for Pepino_LX9 and Pepino_LX25.
>
> Magnus
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