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                 INT 9 - Hardware Keyboard Make/Break Codes

      Key          Make  Break                Key    Make  Break

        Backspace     0E    8E                  F1      3B    BB
        Caps Lock     3A    BA                  F2      3C    BC
        Enter         1C    9C                  F3      3D    BD
        Esc           01    81                  F4      3E    BE
        Left Alt      38    B8                  F7      41    C1
        Left Ctrl     1D    9D                  F5      3F    BF
        Left Shift    2A    AA                  F6      40    C0
        Num Lock      45    C5                  F8      42    C2
        Right Shift   36    B6                  F9      43    C3
        Scroll Lock   46    C6                  F10     44    C4
        Space         39    B9                  F11     57    D7
        Sys Req (AT)  54    D4                  F12     58    D8
        Tab           0F    8F

                  Keypad Keys                Make   Break

                    Keypad 0  (Ins)             52      D2
                    Keypad 1  (End)             4F      CF
                    Keypad 2  (Down arrow)      50      D0
                    Keypad 3  (PgDn)            51      D1
                    Keypad 4  (Left arrow)      4B      CB
                    Keypad 5                    4C      CC
                    Keypad 6  (Right arrow)     4D      CD
                    Keypad 7  (Home)            47      C7
                    Keypad 8  (Up arrow)        48      C8
                    Keypad 9  (PgUp)            49      C9
                    Keypad .  (Del)             53      D3
                    Keypad *  (PrtSc)           37      B7
                    Keypad -                    4A      CA
                    Keypad +                    4E      CE

             Key    Make  Break              Key    Make  Break

                A      1E    9E                 N      31    B1
                B      30    B0                 O      18    98
                C      2E    AE                 P      19    99
                D      20    A0                 Q      10    90
                E      12    92                 R      13    93
                F      21    A1                 S      1F    9F
                G      22    A2                 T      14    94
                H      23    A3                 U      16    96
                I      17    97                 V      2F    AF
                J      24    A4                 W      11    91
                K      25    A5                 X      2D    AD
                L      26    A6                 Y      15    95
                M      32    B2                 Z      2C    AC

             Key    Make  Break              Key    Make  Break

                1      02    82                 -      0C    8C
                2      03    83                 =      0D    8D
                3      04    84                 [      1A    9A
                4      05    85                 ]      1B    9B
                5      06    86                 ;      27    A7
                6      07    87                 '      28    A8
                7      08    88                 `      29    A9
                8      09    89                 \      2B    AB
                9      0A    8A                 ,      33    B3
                0      0B    8B                 .      34    B4
                                                /      35    B5

                   Enhanced Keyboard Keys (101/102 keys)

      Control Keys              Make            Break

        Alt-PrtSc (SysReq)        54              D4
        Ctrl-PrtSc                E0 37           E0 B7
        Enter                     E0 1C           E0 9C
        PrtSc                     E0 2A E0 37     E0 B7 E0 AA
        Right Alt                 E0 38           E0 B8
        Right Ctrl                E0 1D           E0 9D
        Shift-PrtSc               E0 37           E0 B7
        /                         E0 35           E0 B5
        Pause                     E1 1D 45 E1 9D C5  (not typematic)
        Ctrl-Pause (Ctrl-Break)   E0 46 E0 C6        (not typematic)

        - Keys marked as "not typematic" generate one stream of bytes
          without corresponding break scan code bytes (actually the
          break codes are part of the make code).


                      Normal Mode or
                      Shift w/Numlock
      Key              Make    Break     +----- Numlock on ------+
                                            Make          Break
        Del              E0 53   E0 D3     E0 2A E0 53   E0 D3 E0 AA
        Down arrow       E0 50   E0 D0     E0 2A E0 50   E0 D0 E0 AA
        End              E0 4F   E0 CF     E0 2A E0 4F   E0 CF E0 AA
        Home             E0 47   E0 C7     E0 2A E0 47   E0 C7 E0 AA
        Ins              E0 52   E0 D2     E0 2A E0 52   E0 D2 E0 AA
        Left arrow       E0 4B   E0 CB     E0 2A E0 4B   E0 CB E0 AA
        PgDn             E0 51   E0 D1     E0 2A E0 51   E0 D1 E0 AA
        PgUp             E0 49   E0 C9     E0 2A E0 49   E0 C9 E0 AA
        Right arrow      E0 4D   E0 CD     E0 2A E0 4D   E0 CD E0 AA
        Up arrow         E0 48   E0 C8     E0 2A E0 48   E0 C8 E0 AA

      Key           +--Left Shift Pressed--+    +--Right Shift Pressed--+
                       Make          Break          Make          Break
        Del           E0 AA E0 53   E0 D3 E0 2A    E0 B6 E0 53   E0 D3 E0 36
        Down arrow    E0 AA E0 50   E0 D0 E0 2A    E0 B6 E0 50   E0 D0 E0 36
        End           E0 AA E0 4F   E0 CF E0 2A    E0 B6 E0 4F   E0 CF E0 36
        Home          E0 AA E0 47   E0 C7 E0 2A    E0 B6 E0 47   E0 C7 E0 36
        Ins           E0 AA E0 52   E0 D2 E0 2A    E0 B6 E0 52   E0 D2 E0 36
        Left arrow    E0 AA E0 4B   E0 CB E0 2A    E0 B6 E0 4B   E0 CB E0 36
        PgDn          E0 AA E0 51   E0 D1 E0 2A    E0 B6 E0 51   E0 D1 E0 36
        PgUp          E0 AA E0 49   E0 C9 E0 2A    E0 B6 E0 49   E0 C9 E0 36
        Right arrow   E0 AA E0 4D   E0 CD E0 2A    E0 B6 E0 4D   E0 CD E0 36
        Up arrow      E0 AA E0 48   E0 C8 E0 2A    E0 B6 E0 48   E0 C8 E0 36
        /             E0 AA E0 35   E0 B5 E0 2A    E0 B6 E0 35   E0 B5 E0 36


        - The PS/2 models have three make/break scan code sets.  The first
          set matches the PC & XT make/break scan code set and is the one
          listed here.  Scan code sets are selected by writing the value F0
          to the keyboard via the 8042 (port 60h).  The following is a brief
          description of the scan code sets (see the PS/2 Technical Reference
          manuals for more information on scan code sets 2 and 3):

        .  set 1, each key has a base scan code.  Some keys generate
           extra scan codes to generate artificial shift states.  This
           is similar to the standard scan code set used on the PC and XT.
        .  set 2, each key sends one make scan code and two break scan
           codes bytes (F0 followed by the make code).  This scan code
           set is available on the IBM AT also.
        .  set 3, each key sends one make scan code and two break scan
           codes bytes (F0 followed by the make code) and no keys are
           altered by Shift/Alt/Ctrl keys.
        .  typematic scan codes are the same as the make scan code

        - Some Tandy 1000's do not handle Alt key combinations when multiple
          shift keys are pressed.  The Alt-Shift-H combination loses the Alt.
        - extended keys like (F11, F12) can only be read with systems that
          have extended keyboard BIOS support (or INT 9 extensions);  to
          read these special keys on these systems INT 16,10 must be used

          - see  SCAN CODES   KB FLAGS  KEYBOARD COMMANDS