NAME
        ReleaseCard -- Release ownership of credit card

   SYNOPSIS
        ReleaseCard( handle, flags )
                     a1      d0

        void ReleaseCard( struct cardhandle *, ulong );

   FUNCTION
        This function releases ownership of the credit card in the
        slot.

        The access light (if any) is automatically turned off
        (if it was turned on) when you release ownership of
        a card you owned, and all credit-card control registers
        are reset to their default state.

        You must call this function if -

        You own the credit-card, and want to release it so that
        other devices on the notification list will have a chance
        to examine the credit-card in the card slot.

        You took a Card Removed interrupt while you owned the
        credit-card.  If so, you MUST call this function, else
        no other task will be notified of newly inserted cards.  On
        some machines the credit-card interface hardware may also
        be left disabled until you respond to the card removed interrupt
        by calling this function.

        You want to remove yourself from the notification list (see
        optional flags below).

   INPUTS
        handle - Same handle as that used when owncard() was called.

        flags - Optional flags.

                - CARDB_REMOVEHANDLE means you want remove your
                cardhandle structure from the notification list
                whether or not you currently own the credit-card
                in the card slot.  The node structure in your
                cardhandle will be removed from the notification
                list, and ownership will be released if you were
                the owner of the card.

   NOTES
        This function should only be called from a task.

    SEE ALSO
        owncard(), resources/card.i, resources/card.h