Hi,
On 02/13/2012 07:26 AM, Xiangfu Liu wrote:
resolution 640x480(rendering mode): Video Not Supported Unknown at 59
resolution 800x600 : Video Not Supported Unknown at 72
resolution 1024x768 : Video Not Supported Unknown at 59
I guess the "at xx" numbers are the vertical refresh frequency.
anyone have idea how to fix this bug?
Try changing the video timing parameters:
https://github.com/milkymist/milkymist/blob/master/software/include/hw/vga.h#L27
Those are written by the RTEMS driver, but you can change them later
from the shell if you find a way to write 32-bit words instead of bytes.
Or better, use the BIOS with the framebuffer enabled and mr/mw which I
know work correctly.
There are some explanations about the video signal here:
http://www-mtl.mit.edu/Courses/6.111/labkit/vga.shtml
But without a scope and/or logic analyzer to look at the signals and
compare them with those from a working source, it will be a lot of
guessing and trial/error.
Sébastien
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