Greetings !

> Something like that.  The old raster console code, while unpleasant in
> other ways, did seem to get this kind of thing right.  Have a look in
> sys/dev/rcons/raster_op.c for some of the fun involved.
I'll do that... btw. I seem to remember that the Atari video hardware
uses exactly the same memory layout, maybe one could steal some ideas
there...

bye
Michael