The CPU E6300 has got the SL number SLGu9 and has the core stepping R0. It is an Intel® Pentium® Processor for Desktop E6300.
Now if you checked on the Asus Motherboard P5L - 1394 compatibility website:
You will see that the cpu is not on the tested list. So it is not supported from the official Asus compatibility list.
However it does support both Core 2 Duo with core stepping B2 and L2.
Hope this helps a bit.
All the best,