IBM 560 - Manual (Page 29)

Figure 2-5 shows the key numbers assigned to keys on the external
numeric keypad. For scan codes assigned to each numbered key,
refer to the
IBM Personal System/2 Hardware Interface Technical
Reference.
90 95
96
97
98
99
100
101
102
103
104
108
105
106
91
92
93
Figure 2-5. Key Numbers for the External Numeric Keypad
Displayable Characters and Symbols
For displayable characters and symbols that are keyable from the
keyboard, refer to the
IBM Personal System/2 Hardware Interface
Technical Reference.
ThinkPad 560/560E System Board 2-7