[Oberon] FPGA - Colour Support

[Peter Matthias]

Am 08.10.2017 um 17:55 schrieb Jörg:
> But the BIG drawback of such a color memory scheme is, that every color pixel needs several memory accesses, one per plane.
> I thnk consecutive pixels are more efficient. Generalizing Display.Mod from 1 to 2,4 or 8 bpp is a good exercise.

Full ACK here. I will likely port Project Oberon to ARM32 Linux. So I 
will write a 32bpp display driver anyway. 8bpp would be nearly the same. 
An other argument: Keep compatibility with existing hardware in case 
someone wants to use ist.

Peter