On 8/28/06, James Richard Tyrer <[EMAIL PROTECTED]> wrote:
Jon Smirl wrote:
> I'm still trying to figure why there is a need for this external mode
> setting box. I would have thought that the hardware powers on with video
> output disabled. When the host executes the VBIOS ROM it reads the DDC,
> sets a mode, and enables video out. All of the cards default to 640x480
> VGA if they can't find a valid EDID.
>
> For a fixed frequency monitor you would just change the default mode for
> when there is no EDID from 640x480 to whatever you need, reflash the
> VBIOS and boot. No external box needed.
>
> If there is no VBIOS part of the system boot process needs to program the
> mode but it can still handle a fixed frequency monitor if the hardware
> powers up with video output disabled.
It is the boot strap problem -- also called Catch 22.
You have the card in your computer and a monitor that won't support VGA
640x480. How do you get the system started?
Boot the computer using whatever it came with and reflash the VBIOS. I
really doubt that anyone who buys this card and owns a fixed frequency
monitor lacks an alternative means of booting until the VBIOS has been
reflashed.
--
Jon Smirl
[EMAIL PROTECTED]
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