Thanks for the information, for anyone that has the same problem, I have
come up with a solution:
1:Get hold of the SVGA driver code from QNX (It’s on the CD)
2:Remove the entry that prevents super than super modes
3:Find the change mode routine ( this just calls a vesa mode) (mode.c)
4:Before the change mode ( I put it after the DISP_ASSERT() Write the
out8(0x3d4,0x33); Sets access to REG33
out8(0x3d5,0x04); Sets refresh rate (4 gives 75Hz)
5:Rename the driver and put it into the/lib/dll directory
This now gives me an unaccelerated driver that operates over the full
resolution and colour depth of the driver with a fixed frequency of
75Hz. ( Adding acceleration wouldn’t be difficult I just don’t need it
at the moment)
Hope this helps
Hardware Support Account wrote:
You unfortunatly cannot change the refresh rate of the VESA driver.
At this time there are no plans to support the SiS 730 chipset with
an LCD, as we currently do not have the required docs and hardware.
If support for this is needed, you can contact your sales rep and
inquire as to getting these features supported for you.
Dave Edwards <> email@example.com> > wrote:
Hi I’m trying to install 6.1 on a system with an integrated chipset. The
video section of this reports that it is an SiS 730 device.
I can run the Vesa driver, but I cannot change the video refresh rate,
This is a problem for me as I’m trying to use a flat screen display that
will not run at 60Hz.
Does anyone have suggestions as to how I can get the video driver to
operate at 1024x786 by 75 HZ, Alternatively is there a driver in the
Thanks in advance