Asus P4P800 SE - Manual (Page 113)

ASUS P4P800 SE motherboard 5-11
If there is no CD on the drive and you press <F1> or <Space Bar>, the
drive tray ejects.
7. Refer to the Instant Music function key definitions on the previous page
to select other tracks or control the volume.
8. Press <F2> or <Enter> once to stop playing the CD.
Press <F2> or <Enter> one more time to eject the CD.