en:docs:dos:api:int21:37:00
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—en:docs:dos:api:int21:37:00 [2020/12/14 09:57] (current) – created prokushev
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 +{{page>en:templates:dosint}}
 +
 +====== 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 =====
 +
 +Text based on [[http://www.cs.cmu.edu/~ralf/files.html|Ralf Brown Interrupt List Release 61]]
 +
 +{{page>en:templates:int}}
 +
 +{{page>en:templates:fapi}}
 +