anchor.diff:     ed-list-region @ TO temp1
      0 TO temp2   BEGIN
         temp1 zero-out-an-ed-except-link
  +      usb-debug-flag IF
  +        ." ED " temp2 . ."  v: " temp1 . ."  p: " temp1 virt2phys . cr
  +      THEN
         temp1 /edlen +  dup virt2phys  temp1 ed>ned  l!-le  TO temp1
         temp2 1+ TO temp2
         temp2 MAX-EDS =
  
positive.code: 0 VALUE max-rh-ports
  0 VALUE current-stat
  
  INSTANCE VARIABLE td-list-region
  INSTANCE VARIABLE td-list-region-dma
  
  \ ED Management constants
  
  
negative.code: 14 CONSTANT MAX-EDS
  0 VALUE ed-freelist-head
  0 VALUE num-free-eds
  VARIABLE ed-list-region
  VARIABLE ed-list-region-dma
  0 VALUE usb-address
  0 VALUE initial-hub-address
  0 VALUE new-device-address
  