Int 62 Fn 000D  u - Fgdriver V3.03 - "fg_circle" - Draw Unfilled Circle    [V]

   AX = 000Dh
   BX = radius in horizontal screen space units (> 0)

Notes: For FGDRIVER v1.10, this function was "FG_YALPHA" (see AX=00B2h);
     "FG_CIRCLE" was AX=0030h
   The circle is drawn in screen space, centered at the current graphics
     cursor position
   This call is ignored in text modes

See Also: AX=0006h,AX=0008h,AX=000Eh,AX=0024h,AX=0079h