This documentation is basically for all three of Gideon's supported hardware [1541 Ultimate II, 1541 Ultimate II+ & Ultimate 64] projects using firmware up to v3.7 (Which is 1.28 on the Ultimate 64).  Anyway, you can find the most current documentation here online.  The reason I put snapshots of it online is because someday (possibly) someone will want to look back and see the progression of this awesome piece of hardware.