Re: [Freedos-devel] Extended keyboard flag at 0040:0096 gets unexpectedly cleared

[Bernd Böckmann via Freedos-devel]

> Am 14.04.2025 um 15:50 schrieb tom ehlert via Freedos-devel 
> <freedos-devel@lists.sourceforge.net>:
> 
> You are saying that this depends on the menu option being 3, independent of 
> the effect of this option?

Correct, considering the following stripped config:

!MENUCOLOR=7,0
MENUDEFAULT=3,5
MENU 1 - Load FreeDOS with JEMMEX, no EMS (most UMBs), max RAM free
MENU 2 - Load FreeDOS with JEMMEX (more compatible)
MENU 3 - Load FreeDOS with JEMM386 (Expanded Memory)
MENU 4 - Load FreeDOS low with some drivers (Safe Mode)
MENU 5 - Load FreeDOS without drivers (Emergency Mode)
12345?DEVICE=C:\EXTKBD2.EXE

The existence of the extended keyboard flag depends on which menu entry is 
chosen. EXTKBD2 simply displays whether the extended keyboard flag is set.

Also, Willi now noted that he can prevent the extended keyboard not being 
detected by pressing specific keys while the BIOS does its POST: "druck/s-abf, 
pause/unterbr, entf, pos1, bild auf, bild ab und ende tuns auch".

So sounds to me like an issue with the BIOS.

BDA dump with working keyboard:
https://nextcloud.iww.rwth-aachen.de/index.php/s/sd85N4ZaQd3piHP

BDA with broken keyboard:
https://nextcloud.iww.rwth-aachen.de/index.php/s/Ptkf7oGwXAGCiwA

Bernd



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