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  The keycodes as used by the KEYREAD() and KEYSEND() functions have
  been described in this appendix.  The following abbreviations are
  used to represent the key combinations:

                    A-<key>     signifies ALT + key
                    S-<key>     signifies Shift + key
                    ^-<key>     signifies Ctrl + key

            Key         ASCII-1       ASCII-2       INKEY()
            ---         -------       -------       -------
            A-F1         104           1             -30
            A-F2         105           1             -31
            A-F10        113           1             -39
            A-A           30           1             286
            A-B           44           1             300
            A-Z           48           1             304


                    A-<key>     signifies ALT + key
                    S-<key>     signifies Shift + key
                    ^-<key>     signifies Ctrl + key

            Key         ASCII-1       ASCII-2       INKEY()
            ---         -------       -------       -------
            ^-F1          94           1             -20
            ^-F2          95           1             -21
            ^-F10        133           1             -29
            ^-S           19           0               0
            ^-A            1           0               1
            ^-B            2           0               2
            ^-.          116           1               2
            ^-C            3           0               3
            ^-B            4           0               4
            ^-E            5           0               5
            ^-F            6           0               6
            ^-G            7           0               7
            ^-Enter       10           0              10
            ^-R           18           0              18
            ^-V           22           0              22
            ^-W           23           0              23
            ^-X           24           0              24
            ^-Z           26           0              26
            ^-.          115           1              26
            ^-Home       119           1              29
            ^-PgDn       118           1              30
            ^-PgUp       132           1              31


                    A-<key>     signifies ALT + key
                    S-<key>     signifies Shift + key
                    ^-<key>     signifies Ctrl + key

            Key         ASCII-1       ASCII-2       INKEY()
            ---         -------       -------       -------
            S-F1          84           1             -10
            S-F2          85           1             -11
            S-F10         93           1             -19
            A             65           0              65
            B             66           0              66
            Z             90           0              90


                    A-<key>     signifies ALT + key
                    S-<key>     signifies Shift + key
                    ^-<key>     signifies Ctrl + key

            Key         ASCII-1       ASCII-2       INKEY()
            ---         -------       -------       -------
            F2            60           1              -1
            F10           68           1              -9
            Home          71           1               1
            PgDn          81           1               3
            .             77           1               4
            .             72           1               5
            End           79           1               6
            Del           83           1               7
            BkSpc          8           0               8
            Tab            9           0               9
            Enter         13           0              13
            PgUp          73           1              18
            .             75           1              19
            Ins           82           1              22
            .             80           1              24
            Esc           27           0              27
            F1            59           1              28
            0             48           0              48
            1             49           0              49
            a             97           0              97
            b             98           0              98
            z            122           0             122