-V blank processing routine (source file different from the above main)-

#include <machine.h>
#include "sega_spr.h"
#include "sega_scl.h"

#pragma  interrupt(VbStart)
#pragma  interrupt(VbEnd)

void VbStart(void)
{
     SCL_VblankStart (); / * V blank start VDP interrupt processing * /
     -------- / * Other V blank start processing * /
 }

void VbEnd(void)
{
     SCL_VblankEnd (); / * V blank end VDP interrupt processing * /
      -------- / * Other V blank end processing * /
}

Polygon Z sort in the viewpoint coordinate system of the sprite 3D display library is VDP1 extended.
Sprite command priority drawing function of Zhang processing library (2D library)
To perform Z-sorting of polygons, use the SPR_2OpenCommand () routine
Priority drawing on (SPR_2DRAW_PRTY_ON).