Num. devices: list (2-byte one-based item count)
  SRsrc type: 2-byte integer (hex)
  Nubus slot
(card slot+8): 2-byte integer (hex)
  DCtlDevBase: 4-byte integer (hex)
  Mode sRsrcID: 2-byte integer (decimal)
  FlagMask
($77FE): 2-byte integer (hex)
  (bit field)
    Is active: boolean
    Unused: boolean
    Unused: boolean
    Unused: boolean
    Is main scrn: boolean
    Unused: boolean
    Unused: boolean
    Unused: boolean
  (bit field)
    Unused: boolean
    Unused: boolean
    Unused: boolean
    Unused: boolean
    Unused: boolean
    Unused: boolean
    Unused: boolean
    Is color: boolean
  CLUT rsrcID: 2-byte integer (decimal)
  Gamma corr.
rsrcID: 2-byte integer (decimal)
  Glob. rect: rectangle
  Control calls: list (2-byte one-based item count)
    CsCode: 2-byte integer (decimal)
    Length: 2-byte integer (decimal)
    Data (?): 4-byte integer (decimal)