Here's some info Bob Stek sent me last year on a similar problem...
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perhaps this will help:
a15 a14 a13 a12 a15 a14 a13 a12
sw1-8 o o o o o o o o sw1-1
page 1 page 2
sw2-8 o o o o o o o o sw2-1
page 3 page 4
starting address a15 a14 a13 a12 x=open,
off,
down
c=closed, on, up
0000 x x x x
1000 x x x c
2000 x x c x
3000 x x c c
4000 x c x x
5000 x c x c
6000 x c c x
7000 x c c c
8000 c x x x
9000 c x x c
A000 c x c x
B000 c x c c
C000 c c x x
D000 c c x c
E000 c c c x
F000 c c c c