Other graphical routines
extern void FastOutlinedCircle_R(register void *plane asm("%a0"),register unsigned short xcenter asm("%d0"),register unsigned short ycenter asm("%d1"),register unsigned short radius asm("%d2"));
extern void ClipFastOutlinedCircle_R(register void *plane asm("%a0"),register unsigned short xcenter asm("%d0"),register unsigned short ycenter asm("%d1"),register unsigned short radius asm("%d2"));
These routines draw an outlined circle whose center is (xcenter,ycenter), whose radius
is radius, in 240x128 plane plane.
The non-clipped version is nearly twice faster than the clipped one.