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  /
                                      ------
                                  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)
     look very similar to the old style Indigo2 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).