/sys$common/syshlp/USB$SDA_HELP.HLB  —  SHOW  ROOT  Example
 SDA> USB SHO ROOT
 Hub address is:                 89749590
 Descriptor header Flink         8974ded0
 Descriptor header Blink         89746690
 Pointer to array descriptor     897317d0
 Index                           00000001
 Flags 0 -> avail 1 ->used       00000001
 Numbers of entries in this chunk00000001
 Descriptor type                 00000002
 Lock                            0000003a
 KPB pointer                     00000000
 Host controller UCB             896f5400
 Device state                    00000010
    DEVICE CONFIGURED
 Device next state               00000000
    UNKNONW STATE
 Port number                     00000000
 Speed 0->full 1->low 2->High    00000000
 Tier level                      00000000
 USB bus address                 00000001
 Reference count                 00000001
 Flag(s) DEVICE_CONFIG_DEVICE
 Default pipe                    89731e90
 Bus device is attached to       89731750
 Upstream hub address            00000000
 Default pipe requests Flink     897495d8
 Default pipe requests Blink     897495d8
 Driver name                     SYS$HUBDRIVER
 Device descriptor length        00000012
 Descriptor type                 00000001
 Revision                        00000200
 Device class                    00000009
 Device sub class                00000000
 Device protocol                 00000000
 Max packet size                 00000000
 Vendor ID                       00001011
 Product  ID                     00000000
 Manufactures index              00000000
 Product index                   00000000
 Serial number index             00000000
 Number of configurations        00000001
 Pointer to configuration array  89723fd0
 Number of configuration desc    00000001
 Active configuration pointer    8974c550
 Pointer to interface desc array 8972f190
 Default interface array ptr     8974c650
 Pointer to endpoint array       8974c690
      Endpoint Address           8974c690
         Device:    89749590
         Interface: 8972F190
         Desc:      8974C562
         Number:    01
         Pipe:      8974DDD0

 Number of interface descriptors 00000001
 Number of endpoint descriptors  00000001
 Config_value                    00000001
 Failed configure attempts       00000000
 Structure type is               HUB
 -----Embeded hub descriptor-----
 Hub descriptor length           00000008
 Descriptor type                 00000029
 Number of ports                 00000005
 Characteristics low byte        00000009
 Characteristics high byte       00000000
 Power on to power good interval 000000ff
 Hub control current             00000000
 Skipping port power control mask
 -----End of embeded hub descriptor-----
 Hub status change endpoint is   00000081
 Status change pipe handle       ffffffff8974ddd0
 Status change requests Flink    89753e10
 Status change requests Blink    89753e10
 Number of ports                 00000005
 Port[1] status is               00000000
         next saved bits         00000005
         status bits
       4-SEP-2008 17:50:09.89 -> 00010001
       4-SEP-2008 17:50:09.99 -> 00010001
       4-SEP-2008 17:50:09.99 -> 00000001
       4-SEP-2008 17:50:10.00 -> 00100403
 IDX:  4-SEP-2008 17:50:10.00 -> 00000403
 Port[2] status is               00000000
         next saved bits         00000000
 Port[3] status is               00000000
         next saved bits         00000000
 Port[4] status is               00000000
         next saved bits         00000000
 Port[5] status is               00000000
         next saved bits         00000000
 Hub flags                       00000000
 Hub port power count            00000000
 Array of downstream device ptrs 8974c710
      Port[1] device address     8974ded0
      Port[2] device address     00000000
      Port[3] device address     00000000
      Port[4] device address     00000000
      Port[5] device address     00000000
 Hub lock is                     0000003a
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