struct ctl_avc_data
{
  struct ctl_csn_data  *ad_cd;
  struct ctl_csn_cwin  *ad_cc;
  struct GfxBase       *ad_gb;
  struct IntuitionBase *ad_ib;
  struct Library       *ad_lb;
  struct Layer         *ad_layer;
  struct Task          *ad_task;
  volatile LONG         ad_cnt;
  struct ctl_csn_ient   ad_evia;
  struct ctl_csn_ient   ad_evib;
  LONG                  ad_flga;
  LONG                  ad_flgb;
  LONG                  ad_rflg;
  LONG                  ad_efct;
  LONG                  ad_mfct;
  WORD                  ad_xosd;
  WORD                  ad_yosd;
  ULONG                 ad_xcosd;
  ULONG                 ad_ycosd;
};

ad_cd    -  Locally buffered console screen  that is needed for things like
            screen's bitmap poking, semaphore switching, layer creation and
            the like.

ad_cc    -  This member is used in pseudo-interrupt as well as subtask that
            this pseudo-interrupt has created. Tricky!

ad_gb    -  Locally buffered GfxBase. Used  to pass across subtasks so they
            can access graphics.library functions quickly.

ad_ib    -  Locally  buffered IntuitionBase. This is  used to  pass  across
            subtasks so they can access intuition.library functions fast.

ad_lb    -  Locally  buffered  LayersBase. This  is  used  to  pass  across
            subtasks so they can access layers.library functions fast.

ad_layer -  The OSD layer. Not a faully qualified window though!

ad_task  -  Subtasks  get created for a  brief moment. They  never wait for
            the events. This  is good at one  side, cus they do not take up
            memory  for too long, but  on the  other  hand on  demand  task
            creation may be really slow under some circumstances. You  dont
            want to touch this, cus  whole op is  very atomic  and what was
            valid a second ago is surely invalid now.

ad_cnt   -  Subtask  counter, the  limiter, global  subsystem   protection.

ad_evia  -  IDCMP_MOUSEMOVE  handler carry. Used to activate the one below.

ad_evib  -  IDCMP_VANILLAKEY  handler carry. This  handler  allows keyboard
            stuff in console window.

ad_flga  -  Mouse  move  pseudo-interrupt  latch. This is used to establish
            the OSD when mouse is at certain position.

ad_flgb  -  Window  zoom  flags that get  pre-set in  the pseudo-interrupt.

ad_rflg  -  Rearrange  flags  that get  pre-set  in  the  pseudo-interrupt.

ad_efct  -  Effective zoom factor in  %. This is used as a direction of the
            zoom.

ad_mfct  -  A  copy of zoom  factor in  %  as taken  from  function  input.

ad_xosd  -  Size of the OSD layer in X axis in pixels.

ad_yosd  -  Size of the OSD layer in Y axis in pixels.

ad_xcosd -  How  many characters are needed for X resolution to display it.

ad_ycosd -  How  many characters are needed for Y resolution to display it.