satb_update

From ArchaicPixels: HuC and PCEAS Documentation

satb_update();
satb_update(char nb);

     Copy the internal sprite attribute table
     to the video ram. This will refresh sprites
     on the screen. Use this function regularly
     to update the sprite display. The best place
     to call satb_update() is after every vsync()
     call, but no need to call satb_update if you
     didn't change any sprite attribute.
     'nb' specifys the number of sprite to refresh;
     starting from sprite 0. By default the library
     refreshes only the sprites you use, but if you
     need to implicitely refresh a certain number
     of sprites then you can use 'nb'.