Int 21/AX=4412h

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DR DOS 5.0-6.0 - DETERMINE DOS TYPE

AX = 4412h
CF set

Return:
CF set if not DR DOS AX = error code (see #01680 at AH=59h/BX=0000h) CF clear if DR DOS DX = AX = version code (see #01580)

Note: This obsolete call, which is no longer supported in Novell DOS 7, is identical to AX=4452h

See Also: AX=4452h

Category: Other Operating Systems - Int 21h - D

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