Int 2F/AH=A1h/BX=0081h

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Ergo DOS extenders - INSTALLATION CHECK

AH = A1h
BX = 0081h
AL = which
FEh OS/286,OS/386
FFh HummingBoard DOS extender
ES:DI -> 16-byte buffer

Return:
If installed, first four bytes of ES:DI buffer are "IABH"

Note: Since TKERNEL is a licensed version, it is likely that subfunctions BX=0082h and BX=0084h are present and function identically to the AX=FBA1h/BX=008xh calls

See Also: AX=ED00h - AX=FBA1h/BX=0081h - INT 15/AX=BF02h

Category: DOS Extenders - Int 2Fh - E

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