format  void SPR_SetEosMode (Sint32 eosFlag)
 Input  eosFlag: 0 = Sampling even coordinates (default)
.  1 ​​= sample odd coordinates.
 Output  None
 Function value  None
 Function  Sets the sampling coordinate mode of the original picture text 
 when high-speed priority drawing is specified in the drawing mode word of the sprite command 

  format  SPR_WRITE_REG (Uint16 reg, Uint16 val)
 Input  reg: Select and set the type of system register from the following definition values.
  SPR_W_TVMR = TV mode selection
  SPR_W_FBCR = Frame buffer switching mode
  SPR_W_PTMR = Plot trigger
  SPR_W_EWDR = Erase light data
  SPR_W_EWLR = Erase Light upper left coordinates
  SPR_W_EWRR = Erase light bottom right coordinates
  SPR_W_ENDR = Drawing forced termination
  val: Light value
 Output  None
 Function value  None
 Function  Writes to the write-only system register of VDP1. 

  format  Uint16 val = SPR_READ_REG (Uint16 reg)
 Input  reg: Set the system register type from the following definition value.
  SPR_R_EDSR = Transfer end status
  SPR_R_LOPR = Processing suspension table address
  SPR_R_COPR = Current processing table address
  SPR_R_MODR = mode status
 Output  None
 Function value  val: Read value
 Function  Reads the register value from the read-only system register of VDP1.