Int 62 Fn 0082 u - Fgdriver V4.02 - "fg_numlock" - Get State Of Numlock [V]
AX = 0082h
Return: AX = NumLock state (0000h off, 0001h on)
Note: the FGDRIVER functions are rearranged with each major release, but
their parameters do not change (see #3145 at AX=0000h)
See Also: AX=000Ah,AX=00A4h,AX=00A8h,AX=00B1h