pcmouse(7)                                                          pcmouse(7)



NAME
     pcmouse - mouse specifications

DESCRIPTION
     Indy, Indigo2, O2, OCTANE and Onyx2 systems uses an industry standard PC
     (6-pin mini-DIN) mouse port.  All newer SGI systems now use this mouse
     port which allows easy attachment of third party mice, trackballs, or
     other pointing devices.

   Compatibility
     Third-party mouse-port-compatible (also called "PS/2 compatible,"
     "Pointing Device Port" or "PDP") pointing devices commonly sold into the
     IBM PC-compatible market can be used.  Note that the common Microsoft-
     compatible serial mice do not work on the mouse port.  Three-button
     devices are preferred, but two-button devices operate as if the middle
     button does not exist.

     The following mice have been tested (many only briefly):

          SGI PS/2 mice
          IBM PS/2 Model 6450350 (old style)
          IBM PS/2 Model 33G5430 (new style)
          IBM RS/6000 P/N 11F8895 (Logitech M-SB9-6MD)
          Alps Glidepoint (PS/2 mouse port version)
          Logitech MouseMan Serial & Mouseport Version
          Logitech TrackMan Serial & Mouseport Version
          Logitech M-SE9-6MD
          Logitech M-SF15-6MD
          Microsoft Mouse Serial & PS/2 Version (only two buttons)
          MicroSpeed MicroTRAC trackball (only two buttons)
          Mouse Systems White Mouse
          Mouse Systems PC Mouse III (in two button mode only)

   Protocol
     The PS/2 mouse uses a three-byte data block.  The first byte is a control
     byte with the format: YO XO YS XS F M R L where [XY]O is an overflow
     indicator, [XY]S is the sign of the delta bytes, F is floats depending on
     the particular mouse used, and M R L are middle, right, and left buttons
     (1 indicates pressed) respectively.  Byte two is the X delta and byte
     three is the Y delta.

   Pinout
     The mouse connector is a 6 pin mini-DIN connector with the shield
     connected to the system chassis:

                                      ------
                                     / 5 3  \
                                    | ---  1 |
                                    | ---  2 |
                                     \ 6 4  /
                                      ------




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pcmouse(7)                                                          pcmouse(7)



                                  PIN ASSIGNMENTS
                                ___________________

                                Pin | Description
                                ___________________
                                    |
                                 1    Data
                                    |
                                 2    Reserved
                                    |
                                 3    Signal Ground
                                    |
                                 4    Power +5V
                                    |
                                 5    Clock
                                    |
                                 6  | Reserved

NOTES
     All Silicon Graphics systems, except those noted above use the mouse
     described in mouse(7).

     Some Silicon Graphics mice (particularly Silicon Graphics PN 9150800)
                                              2
     look very similar to the old style Indigo  mouse (Silicon Graphics PN
     9150809) and even use the same 6-pin mini-DIN connector, but are not
     compatible.

SEE ALSO
     prom(1M), keyboard(7), mouse(7), pckeyboard(7).


































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