IBM AT 5170 Technical Reference page 63

The following scan codes are reserved.
System
Key Scan Code
Reserved
55
Reserved
56
Reserved
57
Reserved
58
Reserved
59
Reserved
5A
Reserved
5B
Reserved
5C
Reserved
50
Reserved
5E
Reserved
5F
Reserved 60
Reserved 61
Reserved
62
Reserved
63
Reserved 64
Reserved
65
Reserved 66
Reserved
67
Reserved 68
Reserved
69
Reserved
6A
Reserved 6B
Reserved
6C
Reserved
60
Reserved 6E
Reserved 6F
Reserved
70
Reserved
71
Reserved
72
Reserved
73
Reserved
74
Reserved
75
Reserved
76
Reserved
77
Reserved
78
Reserved
79
Reserved
7A
Reserved
7B
Reserved
7C
Reserved
70
Reserved
7E
Reserved 7F
Reserved Scan-Code Translation Table
Keyboard
Scan Code
60
61
78
07
OF
17
IF
27
2F
37
3F
47
4F
56
5E
08
10
18
20
28
30
38
40
48
50
57
6F
13
19
39
51
53
5C
5F
62
63
64
65
67
68
6A
60
6E
System
Board 1-47