DOS ain't dead - How to detect the text mode?

How to detect the text mode? (Developers)

posted by tkchia , 01.02.2021, 14:26

Hello jassenna,

> Do you know any (EGA ir later) video adapter that
> does not support this function [int 0x10,
> ah = 0x1b]? I am interested
> because I have used few adapters and all did work,
> but design of a fallback would depend on how often
> one shall find an incompatible video BIOS.

I am not very sure about that myself. But RBIL lists the function as "PS, VGA/MCGA", so my guess is that not all EGA cards actually support it.

Thank you!

---
https://gitlab.com/tkchia · https://codeberg.org/tkchia · 😴 "MOV AX,0D500H+CMOS_REG_D+NMI"

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Complete thread:

How to detect the text mode? - Laaca, 14.11.2020, 11:00 (Developers)
- How to detect the text mode? - Japheth, 14.11.2020, 16:01
  - How to detect the text mode? - tkchia, 15.11.2020, 08:01
  - How to detect the text mode? - jassenna, 30.12.2020, 17:56
    - How to detect the text mode? - tkchia, 31.12.2020, 08:16
      - How to detect the text mode? - jassenna, 01.02.2021, 00:02
        How to detect the text mode? - tkchia, 01.02.2021, 14:26
        How to detect the text mode? - rr, 01.02.2021, 17:56
- How to detect the text mode? - DosWorld, 15.11.2020, 15:12
  - How to detect the text mode? - Japheth, 15.11.2020, 17:13
    - How to detect the text mode? - DosWorld, 15.11.2020, 18:49
- How to detect the text mode? - bretjohn, 31.12.2020, 17:52