Look at INT 23h. https://fd.lod.bz/rbil/interrup/dos_kernel/23.html
In assembly you might do somethings like this ; Save original interrupt 23h vector MOV AX, 3523h ; AH=35h (Get Interrupt Vector), AL=23h INT 21h ; ES:BX now holds the original vector ; Create new handler (e.g., an IRET instruction to do nothing) ; ... (code for your custom handler, which might just be an IRET) ; Set new interrupt 23h vector MOV DX, OFFSET NewHandler ; DS:DX points to your new handler MOV AX, 2523h ; AH=25h (Set Interrupt Vector), AL=23h INT 21h ; ... (your main program code) ; Restore original interrupt 23h vector before exiting MOV DX, BX ; Restore original offset MOV DS, ES ; Restore original segment MOV AX, 2523h ; AH=25h (Set Interrupt Vector), AL=23h INT 21h On Mon, Sep 22, 2025 at 5:19 PM Norby Droid <danorbydr...@gmail.com> wrote: > Yes I have tried beak off and break on and it doesn't work. I am also > lookin into a way to do it in the language I am doin. > > On Mon, Sep 22, 2025 at 20:15 Louis Santillan <lpsan...@gmail.com> wrote: > >> Have you tried something like >> >> BREAK OFF >> REM Your critical DOS program or batch file commands here >> MYLOGIN.EXE >> BREAK ON >> >> https://help.fdos.org/en/hhstndrd/cnfigsys/break.htm >> >> >> On Mon, Sep 22, 2025 at 4:50 PM Norby Droid via Freedos-user < >> freedos-user@lists.sourceforge.net> wrote: >> >>> Is there any way to temporarily disable the brek key somI can run a >>> login program I am workin on, then renable it again once it is done. I was >>> thinkin mayne a batch file to disable, run login, the enable. Thank you. >>> _______________________________________________ >>> Freedos-user mailing list >>> Freedos-user@lists.sourceforge.net >>> https://lists.sourceforge.net/lists/listinfo/freedos-user >>> >>
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