DIGITAL COMMUNICATIONS ASSOCIATES, INC. (DCA)
=============================================

   IRMATRAC TOKEN-RING ADAPTER/CONVERTIBLE

   4MBPS-ONLY RING INTERFACE MODULE (RIM)

   NIC Type         Token-Ring                                    
   Transfer Rate    4/16Mbps                                      
   Data Bus         16-bit ISA/MCA                                
   Topology         Ring                                          
   Wiring Type      Unshielded twisted pair                       
                                                                  
                    Shielded twisted pair (DB-9 port)             
   Boot ROM         Available                                     

<gopher://bitreich.org/I/th99/n/C-D/40452-1.png>
   

   +------------------------------------------------------------+
   |                      I/O BASE ADDRESS                      |
   |------------------------------------------------------------|
   |           Address           |             JP1              |
   |-----------------------------+------------------------------|
   |>> |      0A20 - 0A3Fh       |      Pins 1 & 2 closed       |
   |---+-------------------------+------------------------------|
   |   |      1A20 - 1A3Fh       |      Pins 2 & 3 closed       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |            Purpose            |          Location          |
   |-------------------------------+----------------------------|
   |  Ring Interface Module (RIM)  |            CON1            |
   +------------------------------------------------------------+

<gopher://bitreich.org/I/th99/n/C-D/40452-2.png>
   

   +------------------------------------------------------------+
   |                         CABLE TYPE                         |
   |------------------------------------------------------------|
   |                 Type                  |      JP2A - D      |
   |---------------------------------------+--------------------|
   |>> |      Unshielded twisted pair      | Pins 1 & 2 closed  |
   |---+-----------------------------------+--------------------|
   |   | Shielded twisted pair (DB-9 port) | Pins 2 & 3 closed  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |            Purpose            |          Location          |
   |-------------------------------+----------------------------|
   |       Backplane Adapter       |            CON1            |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    MISCELLANEOUS NOTES                     |
   |------------------------------------------------------------|
   | Although the backplane adapter can have a 4/16Mbps or      |
   | 4Mbps-only Ring Interface Module (RIM), the 4Mbps-only RIM |
   | is diagrammed because the 4/16Mbps RIM does not have       |
   | jumpers.                                                   |
   +------------------------------------------------------------+