format  void SPR_2OpenCommand (Uint16 drawPrtyFlag)
 Input  drawPrtyFlag: Command drawing priority valid / invalid flag
:  SPR_2DRAW_PRTY_ON = Command drawing priority enabled
:  SPR_2DRAW_PRTY_OFF = Command drawing priority disabled
 Output  None
 Function value  None
 Function  Sets the sprite command write start position to the top of the VRAM command area.
  Therefore, before calling the following series of sprite command setting routines,
 Routine  must be called.
  SPR_2LocalCoord () SPR_2SysClip () SPR_2UserClip () SPR_2line ()
:  SPR_2polyLine () SPR_2Polygon () SPR_2NormSpr () SPR_2ScaleSpr ()
  SPR_2DistSpr () SPR_2Cmd () 

  format  void SPR_2CloseCommand (void)
 Input  None
 Output  None
 Function value  None
 Function  When command drawing priority is enabled, prioritizes commands in VRAM
Chain according to   number.
  Write end sprite command and toggle VRAM area reference switch command
.  

  format  void SPR_2LocalCoord (Sint32 drawPrty, XyInt * xy)
 Input  drawPrty: Command drawing priority number
  xy: Relative coordinates of local coordinates
 Output  None
 Function value  None
A  Function  Set local coordinates