INT 62 u - FGDRIVER v3.03 - "FG_CIRCLEF" - DRAW FILLED CIRCLE
        AX = 000Eh
        BX = radius in horizontal screen space units (> 0)
Notes:  For FGDRIVER v1.10, this function was "FG_XCONVERT" (see AX=00B1h);
          "FG_CIRCLEF" did not exist yet
SeeAlso: AX=0008h,AX=000Dh,AX=0025h,AX=0078h

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