/*                          SCSIGetHighHostBusAdaptor.c                         */

/*

 * GetHighHostBusAdaptor.c

 * Copyright © 1992-94 Apple Computer Inc. All Rights Reserved.

 */

#include "SCSISimpleSample.h"

/*

 * Get the last host bus adaptor. Returns zero (and noErr) for Old SCSI.

 */

OSErr

SCSIGetHighHostBusAdaptor(

        unsigned short                  *lastHostBus

    )

{

        OSErr                           status;

        SCSIBusInquiryPB                busInquiryPB;

#define PB                              (busInquiryPB)

        if (AsyncSCSIPresent() == FALSE) {

            *lastHostBus = 0;

            status = noErr;

        }

        else {

            CLEAR(PB);

            PB.scsiPBLength = sizeof PB;

            PB.scsiFunctionCode = SCSIBusInquiry;

            PB.scsiDevice.bus = 0xFF;

            status = SCSIAction((SCSI_PB *) &PB);

            DisplaySCSIErrorMessage(status, "\pSCSIBusInquiry failed");

            *lastHostBus = PB.scsiHiBusID;

        }

        return (status);

#undef PB

}