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

How to detect the text mode? (Developers)

posted by tkchia , 31.12.2020, 08:16

Hello jassenna,

> There is a third that I use:
> INT10 function 1Bh . This function is well documented both in RBIL
> and in "PC Video Systems".
> It returns a 64 byte data structure containing, among other info,
> video mode, number of characters/line, number of lines/screen.

Thanks, interesting. But I see that, like int 0x10, ax = 0x4f03, it is not supported by all BIOSes, so one will need to fall back on one of the other detection methods (e.g. int 0x10, ah = 0x0f), in any case...

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
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        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