DOS ain't dead

Video BIOS shadowing on modern systems. (Users)

posted by CandyMan, 06.02.2023, 00:26
(edited by CandyMan on 06.02.2023, 00:36)

Direct modification of any BIOS is possible. You can use the UMBPCI driver (source code available by email upon request) to temporarily unprotect the memory, modify the BIOS, and return the memory protection to the state it was before. Plus, it's reversible and you don't need to flash the BIOS. 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.

Try load this UMBCPI.SYS driver with param /C to copy font to BIOS.

https://megawrzuta.pl/download/db4914cf6fc38deeb3af2bca1b0ee8fc.html

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