Yes it is support UMA.
Here is diagram.
On Motherboard R300 and R282 Present.
Posted after 4 hours 26 minutes 6 seconds:this is same as this
viewtopic.php?f=238&t=114587.
Posted after 46 seconds:but i cannot seen it because im new member
Posted after 39 seconds:i just r300 to r299 but sitll black display