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Video BIOS shadowing on modern systems. (Users)

posted by Zyzzle, 10.02.2023, 05:25

> > This way you can load your fonts into the video BIOS and you don't need
> any
> > additional drivers to load them because when you change the video mode,
> the
> > BIOS will load them automatically.
>
> What Zyzzle is trying to do is much more complicated than loading new
> fonts. In addition, UMBPCI is very hardware dependent and may not even
> work at all on some computers. Your solution may be applicable to certain
> situations, but probably not this one.
 Yes, but I still appreciate CandyMan's input. I previously didn't know UMBPCI could "offload" fonts into the vBIOS font area. I tried this on two laptops (one Apollolake, one Kabylake) and in both, UMBPCI said I had incompatible chipsets and could not continue.

Sideloading / injecting custom VGA 9x16 fonts into the vBIOS ROM code is exciting. I use keyRUS v. 8.0 to "replace" my generic, ugly 9x16 DOS VGA font into something much more attractive, but it still consumes ~8kb low memory. If I could accomplish this without losing any valuable memory, it'd be even better, and this is what I understand UMBPCI with the /C parameter seeks to do, according to CandyMan's post above.

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