Tandy 1000 Basic Reference Manual page 393

Appendix D
EXTENDED CODES
For certain keys and key combinations, INKEY$ returns a 2-
character code. The first character is a null character (ASCII
Code 00). The second is usually the scan code of the key(s)
pressed. The key(s) and associated ASCII codes (in decimal) are
listed below.
Second Key(s)
Second Key($
Character Pressed Character Pressed
15
16
17
18
19
20
21
22
23
24
25
30
31
32
33
34
35
36
37
38
44
45
46
47
48
49
50
59
60
61
62
63
64
65
66
67
68
7 1
72
73
75
77
79
8 1
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
391