Declaration
function DriveIsRemoveable(Drive : char) : boolean;

Purpose
Returns True if the specified drive uses removeable media.

Comments
Drive should be a letter in the range 'a'..'z' or 'A'..'Z'. If the
drive is invalid DriveIsRemoveable is unpredictable.

DriveIsRemoveable calls DOS function $44, subfunction 8 which is only
available in versions of DOS 3.x or higher.

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Declaration
function DriveIsFixed(Drive : char) : boolean;

Purpose
Returns True if the specified drive uses fixed media.

Comments
Drive should be a letter in the range 'a'..'z' or 'A'..'Z'. If the
drive is invalid DriveIsFixed is unpredictable.

DriveIsFixed calls DOS function $44, subfunction 8 which is only
available in versions of DOS 3.x or higher.

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Declaration
function DriveIsAbsent(Drive : char) : boolean;

Purpose
Returns True if the specified drive is invalid.

Comments
Drive should be a letter in the range 'a'..'z' or 'A'..'Z'. If the
drive is invalid DriveIsAbsent is unpredictable.

DriveIsAbsent calls DOS function $44, subfunction 8 which is only
available in versions of DOS 3.x or higher.

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Declaration
function NumberOfFloppies : integer;

Purpose
Returns the number of floppy drives installed on the system.

Comments
NumberOfFloppies calls ROM BIOS interrupt $11 to determine the
configuration of the system.