Band:  Deep Purple
Album:  Not sure  
Song:  Black Knight

This is the intro and main riff.
Any comments, email me at [email protected]
Tuning:  EADGBE

Intro:

E|--------------------------------------------------
B|--------------------------------------------------
G|--------------------------------------------------
D|--------------------------------------------------
A|--777-777--555-555--------------------------------
E|--------------------777-777--333-333--------------

Main riff:

E|--------------------------------------------------
B|--------------------------------------------------
G|--------------------------------------------------
D|--------------------------------------------------
A|----5----------5--7-5------5----------------------
E|--7---7-5-3-5-7-7----7-5-7---7--------------------