Evasive?
I just waltzed over to it via
www.sis.com -
http://download.sis.com/
The US Link given is:
http://driver2.sis.com/graphic/gpu/315/315v30755.exe
Also listed for Sis315E
http://download.sis.com/index_step2....t=43&x=13&y=13 (hit GO) - 3 sets, first one the same as the 315, and two dataed later (the same!) but with different file names - not known if they also support the 315 (not E)