Int 21/AX=FF00h/DX=0078h

Int 21/AX=FF00h/DX=0078h

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Rational Systems DOS/4G - INSTALLATION CHECK

AX = FF00h
DX = 0078h

Return:
AL <> 00h if installed
GS = segment of kernel if nonzero

See Also: INT 15/AX=BF02h

Category: DOS Extenders - Int 21h - R

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