NATURAL MICROSYSTEMS CORPORATION
================================

   AG-E1

   Card Type                E1 CSU/DSU                            
   Chip Set                 TI TMS320C51                          
   I/O options              MVIP bus, serial port                 
   Processor                80386SX                               
   Processor Speed          25MHz                                 
   Maximum Transfer Rate    2.048Mbps                             
   Maximum Onboard Memory   4MB DRAM/256KB SRAM                   
   Data Bus                 16-bit ISA                            
   Data Modulation Protocol HDB3, AMI                             

<gopher://bitreich.org/I/th99/t/M-O/51956-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |    Function    | Label |         Function          | Label |
   |----------------+-------+---------------------------+-------|
   | 75ohm line in  |  J2   | DSP daughterboard         |  JP7  |
   |----------------+-------+---------------------------+-------|
   | 75ohm line out |  J3   | Mini-ISA daughterboard    |  JP8  |
   |----------------+-------+---------------------------+-------|
   | MVIP bus       |  JP5  | RS-232 port (see pinout   | JP20  |
   |                |       | below)                    |       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                        JP20 PINOUT                         |
   |------------------------------------------------------------|
   |            Pin             |           Function            |
   |----------------------------+-------------------------------|
   |             1              |            Ground             |
   |----------------------------+-------------------------------|
   |             2              |           Transmit            |
   |----------------------------+-------------------------------|
   |             3              |            Receive            |
   |----------------------------+-------------------------------|
   |             4              |            Ground             |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                            DRAM                            |
   |------------------------------------------------------------|
   |       Size       |       Bank 0       |       Bank 1       |
   |------------------+--------------------+--------------------|
   |       2MB        |     (4) 1M x 4     |        NONE        |
   |------------------+--------------------+--------------------|
   |       4MB        |     (4) 1M x 4     |     (4) 1M x 4     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |               BASE I/O ADDRESS (FIRST DIGIT)               |
   |------------------------------------------------------------|
   |    Setting    |     S1/1      |     S1/2     |    S1/3     |
   |---------------+---------------+--------------+-------------|
   |    0 xxx h    |      On       |      On      |     On      |
   |---------------+---------------+--------------+-------------|
   |    2 xxx h    |      Off      |      On      |     On      |
   |---------------+---------------+--------------+-------------|
   |    4 xxx h    |      On       |     Off      |     On      |
   |---------------+---------------+--------------+-------------|
   |    6 xxx h    |      Off      |     Off      |     On      |
   |---------------+---------------+--------------+-------------|
   |    8 xxx h    |      On       |      On      |     Off     |
   |---------------+---------------+--------------+-------------|
   |    A xxx h    |      Off      |      On      |     Off     |
   |---------------+---------------+--------------+-------------|
   |    C xxx h    |      On       |     Off      |     Off     |
   |---------------+---------------+--------------+-------------|
   |    E xxx h    |      Off      |     Off      |     Off     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |            BASE I/O ADDRESS (LAST THREE DIGITS)            |
   |------------------------------------------------------------|
   |    Setting    |     S1/4     |     S1/5     |     S1/6     |
   |---------------+--------------+--------------+--------------|
   |    x 100h     |      On      |     Off      |     Off      |
   |---------------+--------------+--------------+--------------|
   |    x 180h     |     Off      |      On      |     Off      |
   |---------------+--------------+--------------+--------------|
   |    x 1A0h     |     Off      |     Off      |      On      |
   |---------------+--------------+--------------+--------------|
   |    x 1C0h     |     Off      |      On      |      On      |
   |---------------+--------------+--------------+--------------|
   |    x 280h     |      On      |      On      |     Off      |
   |---------------+--------------+--------------+--------------|
   |    x 2A0h     |      On      |     Off      |      On      |
   |---------------+--------------+--------------+--------------|
   |    x 2C0h     |      On      |      On      |      On      |
   |---------------+--------------+--------------+--------------|
   |    x 340h     |     Off      |     Off      |     Off      |
   +------------------------------------------------------------+

<gopher://bitreich.org/I/th99/t/M-O/51956-2.png>
   

   +------------------------------------------------------------+
   |                     DIAGNOSTIC LED(S)                      |
   |------------------------------------------------------------|
   | LED | Color | Status |              Condition              |
   |-----+-------+--------+-------------------------------------|
   | D1  |  Red  |   On   | MVIP processor request in progress  |
   |-----+-------+--------+-------------------------------------|
   | D1  |  Red  |  Off   |    MVIP processor request not in    |
   |     |       |        |              progress               |
   |-----+-------+--------+-------------------------------------|
   | D1  | Green |   On   |  MVIP processor grant in progress   |
   |-----+-------+--------+-------------------------------------|
   | D1  | Green |  Off   |     MVIP processor grant not in     |
   |     |       |        |              progress               |
   |-----+-------+--------+-------------------------------------|
   | D2  |  Red  |   On   |     Task processor 1 request in     |
   |     |       |        |              progress               |
   |-----+-------+--------+-------------------------------------|
   | D2  |  Red  |  Off   |   Task processor 1 request not in   |
   |     |       |        |              progress               |
   |-----+-------+--------+-------------------------------------|
   | D2  | Green |   On   | Task processor 1 grant in progress  |
   |-----+-------+--------+-------------------------------------|
   | D2  | Green |  Off   |    Task processor 1 grant not in    |
   |     |       |        |              progress               |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 DIAGNOSTIC LED(S) (CON'T)                  |
   |------------------------------------------------------------|
   | LED | Color  | Status |             Condition              |
   |-----+--------+--------+------------------------------------|
   | D3  |  Red   |   On   |    Task processor 2 request in     |
   |     |        |        |              progress              |
   |-----+--------+--------+------------------------------------|
   | D3  |  Red   |  Off   |  Task processor 2 request not in   |
   |     |        |        |              progress              |
   |-----+--------+--------+------------------------------------|
   | D3  | Green  |   On   | Task processor 2 grant in progress |
   |-----+--------+--------+------------------------------------|
   | D3  | Green  |  Off   |   Task processor 2 grant not in    |
   |     |        |        |              progress              |
   |-----+--------+--------+------------------------------------|
   | D4  |  Red   |   On   |    Task processor 3 request in     |
   |     |        |        |              progress              |
   |-----+--------+--------+------------------------------------|
   | D4  |  Red   |  Off   |  Task processor 3 request not in   |
   |     |        |        |              progress              |
   |-----+--------+--------+------------------------------------|
   | D4  | Green  |   On   | Task processor 3 grant in progress |
   |-----+--------+--------+------------------------------------|
   | D4  | Green  |  Off   |   Task processor 3 grant not in    |
   |     |        |        |              progress              |
   |-----+--------+--------+------------------------------------|
   | D5  |  Red   |   On   |    Task processor 4 request in     |
   |     |        |        |              progress              |
   |-----+--------+--------+------------------------------------|
   | D5  |  Red   |  Off   |  Task processor 4 request not in   |
   |     |        |        |              progress              |
   |-----+--------+--------+------------------------------------|
   | D5  | Green  |   On   | Task processor 4 grant in progress |
   |-----+--------+--------+------------------------------------|
   | D5  | Green  |  Off   |   Task processor 4 grant not in    |
   |     |        |        |              progress              |
   |-----+--------+--------+------------------------------------|
   | D6  |  Red   |   On   |    Task processor 5 request in     |
   |     |        |        |              progress              |
   |-----+--------+--------+------------------------------------|
   | D6  |  Red   |  Off   |  Task processor 5 request not in   |
   |     |        |        |              progress              |
   |-----+--------+--------+------------------------------------|
   | D6  | Green  |   On   | Task processor 5 grant in progress |
   |-----+--------+--------+------------------------------------|
   | D6  | Green  |  Off   |   Task processor 5 grant not in    |
   |     |        |        |              progress              |
   |-----+--------+--------+------------------------------------|
   | D7  |  Red   |   On   |    Task processor 6 request in     |
   |     |        |        |              progress              |
   |-----+--------+--------+------------------------------------|
   | D7  |  Red   |  Off   |  Task processor 6 request not in   |
   |     |        |        |              progress              |
   |-----+--------+--------+------------------------------------|
   | D7  | Green  |   On   | Task processor 6 grant in progress |
   |-----+--------+--------+------------------------------------|
   | D7  | Green  |  Off   |   Task processor 6 grant not in    |
   |     |        |        |              progress              |
   |-----+--------+--------+------------------------------------|
   | D8  |  Red   |   On   |         Processor is reset         |
   |-----+--------+--------+------------------------------------|
   | D8  |  Red   |  Off   |       Processor is not reset       |
   |-----+--------+--------+------------------------------------|
   | D8  | Green  |   On   |            SRAM is busy            |
   |-----+--------+--------+------------------------------------|
   | D8  | Green  |  Off   |          SRAM is not busy          |
   |-----+--------+--------+------------------------------------|
   | D9  |  Red   |   On   |   Processor is transmitting data   |
   |-----+--------+--------+------------------------------------|
   | D9  |  Red   |  Off   |    Processor is receiving data     |
   |-----+--------+--------+------------------------------------|
   | D9  | Green  |   On   |  Host is reading/writing to SRAM   |
   |-----+--------+--------+------------------------------------|
   | D9  | Green  |  Off   |  Processor is reading/writing to   |
   |     |        |        |                SRAM                |
   |-----+--------+--------+------------------------------------|
   | D10 |  Red   |   On   |        DSP chips are reset         |
   |-----+--------+--------+------------------------------------|
   | D10 |  Red   |  Off   |      DSP chips are not reset       |
   |-----+--------+--------+------------------------------------|
   | D11 | Yellow |   On   |  Yellow alert status has occurred  |
   |-----+--------+--------+------------------------------------|
   | D11 | Yellow |  Off   |    Yellow alert status has not     |
   |     |        |        |              occurred              |
   |-----+--------+--------+------------------------------------|
   | D12 |  Red   |   On   |   Red alert status has occurred    |
   |-----+--------+--------+------------------------------------|
   | D12 |  Red   |  Off   | Red alert status has not occurred  |
   |-----+--------+--------+------------------------------------|
   | D13 | Green  |   On   |  Diagnostics are being performed   |
   |-----+--------+--------+------------------------------------|
   | D13 | Green  |  Off   |     Diagnostics are not being      |
   |     |        |        |             performed              |
   |-----+--------+--------+------------------------------------|
   | D14 | Green  |   On   |         T1 signal detected         |
   |-----+--------+--------+------------------------------------|
   | D14 | Green  |  Off   |       T1 signal not detected       |
   +------------------------------------------------------------+