/sys$common/syshlp/USB$SDA_HELP.HLB  —  SHOW  EHCI  REGISTERS  OPERATING  Example
 SDA> USB SHOW EHCI REGISTERS OPERATING
 Current EHCI operating registers as read from the controller

 Extended Host Controller Operating Registers
 ----------------------------------        ----------
 USB Commad Register                         00080031
   Run/Stop                                 1
   Host Controler Reset                     0
   Frame List size 0-1024, 1-512, 2-256     0
   Periodic Schedule Enable                 1
   Asynchronous Schedule Enable             1
   Interrupt on Async Advance Doorbell      0
   Light Host Conrtoller Reset              0
   Asynchronous schedule park mode count    0
   Asynchronous Schedule park mode enable   0
   Interrupt Threshold Control             08
 USB Status Register                         0000c000
   USB Interrupt                            0
   USB Error Interrupt                      0
   Port Change Detect                       0
   Frame List Rollover                      0
   Host System Error                        0
   Interrupt on Asynch Advance              0
   HCHalted                                 0
   Reclamation                              0
   Periodic Schedule Status 1 - enabled     1
   Asynchronous Schedule Status 1 - enabled 1
 USB Interrupt Enable Register               0000003f
   USB Interrupt Enable                     1
   USB Error Interrupt Enable               1
   Port Change Interrupt Enable             1
   Frame List Rollover Enable               1
   Host System Error Enable                 1
   Interrupt On Async Advance Enable        1

 Frame Index Register                        00003324
 Control Data Structure Segment Register     00000000
 Periodic Frame List Base Address            454b0000
 Current Asynchronous List Address Base      45490040
 Configure Flag Register                     00000000

 Port 01 Status and Control Register         00001005
   Current connection status                1
   Current connection status change         0
   Port enable/disable                      1
   Port enable/disable change               0
   Over-current active                      0
   Over-current change                      0
   Force port resume                        0
   Port suspend                             0
   Port reset                               0
   Line Status 0 - SEO
               1 - K-State
               2 - J-State
               3 - undefined                0
   Port Power                               1
   Port owner                               0
   Port indicator                           0
   Port test 0 - test mode not enabled
             1 - Test J state
             2 - Test K State
             3 - Test SE0 state
             4 - Test packet
             5 - Test force enable          0
   Wake on connection enable                0
   Wake on disconnect enable                0
   Wake on over-current enable              0
 Port 02 Status and Control Register         00001000
   Current connection status                0
   Current connection status change         0
   Port enable/disable                      0
   Port enable/disable change               0
   Over-current active                      0
   Over-current change                      0
   Force port resume                        0
   Port suspend                             0
   Port reset                               0
   Line Status 0 - SEO
               1 - K-State
               2 - J-State
               3 - undefined                0
   Port Power                               1
   Port owner                               0
   Port indicator                           0
   Port test 0 - test mode not enabled
             1 - Test J state
             2 - Test K State
             3 - Test SE0 state
             4 - Test packet
             5 - Test force enable          0
   Wake on connection enable                0
   Wake on disconnect enable                0
   Wake on over-current enable              0
 Port 03 Status and Control Register         00001000
   Current connection status                0
   Current connection status change         0
   Port enable/disable                      0
   Port enable/disable change               0
   Over-current active                      0
   Over-current change                      0
   Force port resume                        0
   Port suspend                             0
   Port reset                               0
   Line Status 0 - SEO
               1 - K-State
               2 - J-State
               3 - undefined                0
   Port Power                               1
   Port owner                               0
   Port indicator                           0
   Port test 0 - test mode not enabled
             1 - Test J state
             2 - Test K State
             3 - Test SE0 state
             4 - Test packet
             5 - Test force enable          0
   Wake on connection enable                0
   Wake on disconnect enable                0
   Wake on over-current enable              0
 Port 04 Status and Control Register         00001000
   Current connection status                0
   Current connection status change         0
   Port enable/disable                      0
   Port enable/disable change               0
   Over-current active                      0
   Over-current change                      0
   Force port resume                        0
   Port suspend                             0
   Port reset                               0
   Line Status 0 - SEO
               1 - K-State
               2 - J-State
               3 - undefined                0
   Port Power                               1
   Port owner                               0
   Port indicator                           0
   Port test 0 - test mode not enabled
             1 - Test J state
             2 - Test K State
             3 - Test SE0 state
             4 - Test packet
             5 - Test force enable          0
   Wake on connection enable                0
   Wake on disconnect enable                0
   Wake on over-current enable              0
 Port 05 Status and Control Register         00001000
   Current connection status                0
   Current connection status change         0
   Port enable/disable                      0
   Port enable/disable change               0
   Over-current active                      0
   Over-current change                      0
   Force port resume                        0
   Port suspend                             0
   Port reset                               0
   Line Status 0 - SEO
               1 - K-State
               2 - J-State
               3 - undefined                0
   Port Power                               1
   Port owner                               0
   Port indicator                           0
   Port test 0 - test mode not enabled
             1 - Test J state
             2 - Test K State
             3 - Test SE0 state
             4 - Test packet
             5 - Test force enable          0
   Wake on connection enable                0
   Wake on disconnect enable                0
   Wake on over-current enable              0
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