Function 
-  Sets up RDP blender. 
  MrnBlenderMode defines the cycle type and render mode of the RDP. 

Functions 
-  void mrnBlenderModeSet( MrnBlenderMode *mode_ptr,
                          const u8 cycle_type,
                          const u8 p1, const u8 m1, const u8 a1, const u8 b1,
                          const u8 p2, const u8 m2, const u8 a2, const u8 b2,
                          const u16 render_mode_flags );
  Sets values in MrnBlenderMode. 
    p1, m1, a1, b1 are for the 1st cycle. 
    p2, m2, a2, b2 are for the 2nd cycle. 
  Select the various arguments from the following macros. 
    cycle_type:  	MRN_BLENDER_MODE_CYCLE_TYPE_*
    p1,p2:       	MRN_BLENDER_MODE_P_*
    m1,m2:       	MRN_BLENDER_MODE_M_*
    a1,a2:       	MRN_BLENDER_MODE_A_*
    b1,b2:       	MRN_BLENDER_MODE_B_*
  render_mode_flags is set by the logical sum of MRN_BLENDER_MODE_*. 

History 
  1998/ 9/22 Takamitsu Hirata 
    BlenderMode.h, blendermode.c :  Initial version 
