This seem to be a rather odd question..
I've connected an HMC5983 compass via the I2C..
That IC stores the direction measurement in two registers (MSB and LSB).
Together they make up a 16-bit value in 2's complement form, whose range is 0xF800 to 0x07FF (so says the datasheet).
I do not understand how to approach the conversion from two's complement form to 'normal' numbers..
I've tried to read up on this, but sill cant get it..
So I'd be grateful If somebody could explain

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