[OpenBIOS] sorry to ask this again
m.dentico at teseo.it
Wed Apr 5 00:13:45 CEST 2000
Jeff Garzik wrote:
> Massimo Dentico wrote:
> > "Ronald G. Minnich" wrote:
> > >
> > > If someone has the *code* example for calling the vga init on a vga card I
> > > could use it.
> > Sorry for the delay. No distractions this time, only assembly code
> > for swithing video modes. ;-) This work, at least for me. Obviously,
> > I'm not writing BIOS usually :o) .. so, I don't know if it lacks
> > something for functioning as part of firmware.
> Thanks for posting code, unfortunately this code does not call the VGA
> BIOS to initialize the video card -- this code directly programs the VGA
> registers to switch modes, just like vga16fb in the Linux kernel.
> BIOS init must have already executed in order for this code to work.
Ops .. an error due to my scarce knowledge of PC hardware
and this phrase on the Linux BIOS home page: ".. simple VGA
capability up WITHOUT a VGA BIOS ..". So, is there an absolutely
necessary initialization phase that precede the setting of a
video mode? To switch a video mode requires the setting of dozens
of registers .. I hope that the init phase isn't so complicated.
Sorry again, my intention was only to help.
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