Displays the Host Controller Drivers Queue heads (HCDQH) that are
   in the periodic schedule.  Slots that do not have HCDQH's are not
   shown.

1  –  Example

 SDA> USB SHOW EHCI PERIODIC
 EHCI Periodic list
 ------------------
 [0006]
     HCDQH = 896C4380
         HCDQTD = 896C82A0, status = 80
 [0008]
     HCDQH = 896C4300
         HCDQTD = 896C9C20, status = 80
 [0016]
     HCDQH = 896C4380
         HCDQTD = 896C82A0, status = 80
 [0018]
     HCDQH = 896C4300
         HCDQTD = 896C9C20, status = 80

             .
             .
             .

 [1012]
     HCDQH = 896C4300
         HCDQTD = 896C9B60, status = 80
 [1020]
     HCDQH = 896C4380
         HCDQTD = 896C82A0, status = 80
 [1022]
     HCDQH = 896C4300
         HCDQTD = 896C9B60, status = 80
 SDA>