Yamaha S80: microphone input?

[Henry Low]

Hi I was wondering about the Yamaha S80 keyboard, I read somewhere that it has a microphone input, can someone confirm if this is true? If it is true, can I hook up my keyboard to my line-in jack located on my soundcard for my computer and have the microphone sounds coming out of my computer? For example, I sing through into the microphone which is connected into the Yamaha S80 keyboard which is connected to the line-in jack on my soundcard... Can I record my singing that way? eliminating the need for a microphone preamp/amp ?

Thanks in Advance