The ASCII Table
The 4004 uses a seven-bit ASCII code, which is the normal 8 bit ASCII code with the parity (high order) bit always reset.
Graphic or Control |
ASCII (Hexadecimal) |
|---|---|
NULL |
00 |
SOM |
01 |
EOA |
02 |
EOM |
03 |
EOT |
04 |
WRU |
05 |
RU |
06 |
BELL |
07 |
FE |
08 |
H.Tab |
09 |
Line Feed |
0A |
|
0B |
Form |
0C |
Return |
0D |
S0 |
0E |
S1 |
0F |
DCO |
10 |
X-On |
11 |
Tape Aux. On |
12 |
X-Off |
13 |
Tape Aux. Off |
14 |
Error |
15 |
Sync |
16 |
LEM |
17 |
S0 |
18 |
S1 |
19 |
S2 |
1A |
83 |
1B |
S4 |
1C |
S5 |
1D |
S6 |
1E |
S7 |
1F |
ACK |
7C |
Alt. Mode |
7D |
Rubout |
7F |
! |
21 |
“ |
22 |
# |
23 |
$ |
24 |
% |
25 |
& |
26 |
‘ |
27 |
( |
28 |
) |
29 |
* |
2A |
+ |
2B |
, |
2C |
- |
2D |
. |
2E |
/ |
2F |
: |
3A |
; |
3B |
< |
3C |
= |
3D |
> |
3E |
? |
3F |
[ |
5B |
/ |
5C |
] |
5D |
↑ |
5E |
← |
5F |
@ |
40 |
blank |
20 |
0 |
30 |
1 |
31 |
2 |
32 |
3 |
33 |
4 |
34 |
5 |
35 |
6 |
36 |
7 |
37 |
8 |
38 |
9 |
39 |
A |
41 |
B |
42 |
C |
43 |
D |
44 |
E |
45 |
F |
46 |
G |
47 |
H |
48 |
I |
49 |
J |
4A |
K |
4B |
L |
4C |
M |
4D |
N |
4E |
O |
4F |
P |
50 |
Q |
51 |
R |
52 |
S |
53 |
T |
54 |
U |
55 |
V |
56 |
W |
57 |
X |
58 |
Y |
59 |
Z |
5A |
