en:docs:dos:api:int21:37:00

Note: This API call is for DOS personality only. Use Family API for portability.

2018/09/07 07:04 · prokushev

Int 21H, AH=37H, AL=00H

Version

2 and higher

Brief

GET SWITCH CHARACTER

Family API

Input

      AX = 3700h

Return

AL = status

          00h successful
              DL = current switch character
          FFh unsupported subfunction

Macro

Notes

Determine the character which is used to introduce command switches.
        This setting is ignored by MS-DOS commands in version 4.0 and higher,
        but is honored by many third-party programs and by Novell DOS 7
        external commands

BUG: Novell DOS 7's COMMAND.COM (prior to Update 15) fails to honor the

       SwitChar setting for internal commands even though COMMAND.COM
        honors it in its own command tail (i.e. COMMAND /?); even in Update
        15, internal commands fail to honor SwitChar for the /? help option
documented in some OEM versions of some releases of DOS
      supported by OS/2 compatibility box
      always returns AL=00h/DL=2Fh for MS-DOS 5+ and DR DOS 3.41-6.0
      Novell DOS 7 COMMAND.COM indicates switch characters other than '/'
        by changing the first backslash (and only the first one) in the
        path it prints for PROMPT $p with a forward slash

See also

AX=3701h

Note


en/docs/dos/api/int21/37/00.txt · Last modified: 2020/12/14 10:57 by prokushev