There are more jumpers that are not documented and some have charts printed on the board:
Jumper# / Pins / Current State
JP1 (4) 3-4 (No info)
JP2 (4) 3-4 (No info)
JP5 (3) 1-2 (No info, might be the Bios voltage as per continuity test: 5v / 12v)
JP10 (3) 2-3 (Tage Size, as per chart printed on the board)
JP11 (2) Open (No info)
JP12 (3) 1-2 (L2 size, as per chart printed on the board)
JP13 (3) 2-3 (L2 size, as per chart printed on the board)
JP14 (2) I wasn't able to find this jumper (Pipeline, as per chart printed on the board)
JP19 (6) Open (No info)
JP20 (4) Hard Wired ((No info, might be CPU Voltage)
JP22 (3) 1-2 (No info)
JP27 (3) 1-2 (No info)
See attached doc with updated info.