DOS ain't dead

Video BIOS shadowing on modern systems. (Users)

posted by CandyMan, 10.02.2023, 09:52

> 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.

I wanted to show that you can do something like this (inject your fonts).
Maybe you can also add some function to the JEMM driver that would modify the BIOS mapped as ROM. This should work on any computer where the UMBPCI trick can't be done.

Complete thread:

• Video BIOS shadowing on modern systems. - Zyzzle, 02.02.2023, 10:54 (Users)
  • Video BIOS shadowing on modern systems. - tom, 02.02.2023, 14:24
    • Video BIOS shadowing on modern systems. - bretjohn, 02.02.2023, 18:02
      • Video BIOS shadowing on modern systems. - Zyzzle, 03.02.2023, 02:53
        • Video BIOS shadowing on modern systems. - CandyMan, 06.02.2023, 00:26
          • Video BIOS shadowing on modern systems. - bretjohn, 07.02.2023, 15:47
            • Video BIOS shadowing on modern systems. - Zyzzle, 10.02.2023, 05:25
              • Video BIOS shadowing on modern systems. - CandyMan, 10.02.2023, 09:52
                • Video BIOS shadowing on modern systems. - Oso2k, 11.02.2023, 23:54
                  • Video BIOS shadowing on modern systems. - CandyMan, 12.02.2023, 09:24
                    • Video BIOS shadowing on modern systems. - tom, 12.02.2023, 12:00
                • Video BIOS shadowing on modern systems. - Zyzzle, 22.02.2023, 10:24
                  • Video BIOS shadowing on modern systems. - CandyMan, 26.12.2023, 19:48