INT 62 u - FGDRIVER v3.03 - "FG_CURSOR" - SPECIFY WHETHER TEXT CURSR IS VISIBLE
        AX = 0013h
        BX = new state (0000h invisible, 0001h visible)
Notes:  For FGDRIVER v1.10, this function was unused; "FG_CURSOR" was AX=0007h
        This call is ignored in text modes
SeeAlso: AX=000Ch,AX=0045h,AX=0047h,AX=0055h,AX=005Fh,AX=0063h,AX=0068h
SeeAlso: AX=00AFh

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