DOS ain't dead

Video BIOS shadowing on modern systems. (Users)

posted by Zyzzle, 22.02.2023, 10:24

> 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.

Finally got the /C parameter to work on my Kabylake system with i5 8250 CPU. JEMM detects the chipset properly, and this /C option saves me 6k of low memory which used to be taken up by KEYRUS v. 8.0.

Thanks for the tip. I'm looking at JEMM and the possibility of modifying it to map the vBIOS ROM code using a similar "trick" as is done with the /C parameter in moving the 4k BIOS font to (modifiable) XMS memory instead.

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