IBM 5150 Technical Reference page 108

Character Codes
The following character codes are passed through the BIOS
keyboard routine to the system or application program. A'-1 '
means the combination is suppressed in the keyboard routine.
~
The codes are returned in AL.
Key
Number
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
Base Case
Esc
1
2
3
4
5
6
7
8
9
0
-
=
Backspace (008)
-\(009)
q
w
UpperCase
Esc
!
@
#
$
%
.
&
*
(
)
-
+
Backspace (008)
i-(Note 1)
Q
W
Character Codes (Part 1 of 3)
Ctrl Alt
Esc
-1
- 1 Note 1
Nul (000) Note 1 Note 1
-1
Note 1
-1 Note 1
-1
Note 1
RS(030)
Note 1
-1
Note 1
-1 Note 1
-1 Note 1
-1
Note 1
US(031)
Note 1
-1 Note 1
Del (127) -1
-1
- 1
DCl (017) Note 1
ETB (023)
Note 1
System BIOS 5-15