0		00
1		01
2		02
3		03
4		04
5		05
6		06
7		07
8		08
9		09
:		0A
$		0B
?		0D
<space>		0C
A		20
B		25
C		23
D		1A
E		12
F		1B
G		1C
H		1D
I		16
J		1E
K		1F
L		0E
M		26
N		2D
O		17
P		0F
Q		18
R		13
S		19
T		14
U		15
V		24
W		11
X		22
Y		2C
Z		21
.		27
-		28
x		29
+		10
<divide sign>	2A
=		2B
/		2E
\		3B
<block>		2F
10		30
<ball>		31
<man rt>	32
<man rt walk>	33		
<man lft walk>	34
<man lft>	35		
<arrow rt>	36
<tree>		37
<slope lft>	38
<slope rt>	39
<man forward>	3A
<ship 1>	3C
<plane>		3D
<ship 2>	3E
<ship 3>	3F
For more info on the Odyssey 2, 
check out http://coprolite.com/8048.html.
Many thanks to Dan Boris for his contibution
to the inner workings of the Odyssey 2:
http://www.atarihq.com/danb/o2.shtml#techfiles