unlisten.c

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/*
 *  This program is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU General Public License
 *  as published by the Free Software Foundation; either version
 *  2 of the License, or (at your option) any later version.
 *
 *  Copyright 1999-2004 Michael Klein <michael(dot)klein(at)puffin(dot)lb(dot)shuttle(dot)de>
 *  Copyright 2001-2004 Spiro Trikaliotis
 *
 */

#include <wdm.h>
#include "cbm_driver.h"
#include "i_iec.h"

NTSTATUS
cbmiec_unlisten(IN PDEVICE_EXTENSION Pdx)
{
    NTSTATUS ntStatus;
    ULONG sent;
    UCHAR buffer;

    FUNC_ENTER();

    // send a 0x3F (unlisten) under control of ATN

    buffer = 0x3f;
    ntStatus = cbmiec_i_raw_write(Pdx, &buffer, 1, &sent, 1, 0);

    Pdx->DoNotReleaseBus = FALSE;

    FUNC_LEAVE_NTSTATUS(ntStatus);
}