This is a silly guess, but have you tried adjusting the dram refresh? I'm
just familiar enough with the VDC to know it has programmable refresh, and
it might need to be changed to suit the larger amount of data being read.
On Fri, 1 Feb 2002, MagerValp wrote:
> I'm trying to set up the VDC screen to a 640x200 bitmap with 8x2 pixel
> attribute cells. Char height is set to two, vertical display registers
> are quadrupled. I get a screen, but the two rightmost columns display
> flickering garbage. Changing the number of characters per line to 78
> or less makes the bug go away. Does anyone know of a workaround?
>
> --
> ___ . . . . . + . . o
> _|___|_ + . + . + . . Per Olofsson, konstnär
> o-o . . . o + MagerValp@cling.gu.se
> - + + . http://www.cling.gu.se/~cl3polof/
>
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