Re: [SeaBIOS] [PATCH 0/3] SeaVGABIOS serial console test

[Gerd Hoffmann]

Hi,
> After I posted the seavgabios stuff above, it occurred to me that
> another way to tackle this would be to keep the code in seabios and
> harden the sercon assembler entry point.  Specifically, the assembler
> code could check that the last mode set wasn't from a vesa mode set
> call and it could check that calll (vs callw) works.

Additionally we need to hook the sercon code only into a few subcalls,
and with the exception of 00h (aka set-mode) none of them are useful for
software which wants program vesa modes.  So, yes, I think that could
work.

I'll go have a look, starting with old linux xorg+x86emu.
Do you remember which windows versions have problems too?

cheers,
  Gerd