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

   AG-8, AG-8/F

   Card Type              Telephony                               
   Chip Set               TI TMS320C51                            
   I/O options            MVIP bus, serial port                   
   Processor              80386SX                                 
   Processor Speed        16/25MHz                                
   Maximum Onboard Memory 512KB DRAM/256KB SRAM                   
   Data Bus               16-bit ISA                              

<gopher://bitreich.org/I/th99/t/M-O/51960-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |         Function          | Label |    Function    | Label |
   |---------------------------+-------+----------------+-------|
   | RS-232 port (see pinout   |  E43  | Lines 3 & 4    |  CN2  |
   | below)                    |       |                |       |
   |---------------------------+-------+----------------+-------|
   | MVIP bus                  |  JP5  | Lines 5 & 6    |  CN3  |
   |---------------------------+-------+----------------+-------|
   | DSP daughterboard         |  JP7  | Lines 7 & 8    |  CN4  |
   |---------------------------+-------+----------------+-------|
   | Mini-ISA daughterboard    |  JP8  | Power, ground, |  CN5  |
   |                           |       | and signaling  |       |
   |---------------------------+-------+----------------+-------|
   | Lines 1 & 2               |  CN1  |                |       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                         E43 PINOUT                         |
   |------------------------------------------------------------|
   |            Pin             |           Function            |
   |----------------------------+-------------------------------|
   |             1              |            Ground             |
   |----------------------------+-------------------------------|
   |             2              |           Transmit            |
   |----------------------------+-------------------------------|
   |             3              |            Receive            |
   |----------------------------+-------------------------------|
   |             4              |            Ground             |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                        SRAM BANK 0                         |
   |------------------------------------------------------------|
   |            Size            |            Bank 0             |
   |----------------------------+-------------------------------|
   |            32KB            |          (4) 16K x 4          |
   |----------------------------+-------------------------------|
   |           128KB            |          (4) 64K x 4          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 SRAM BANK 0 CONFIGURATION                  |
   |------------------------------------------------------------|
   |    Size    |      R66      |      R67      |      R68      |
   |------------+---------------+---------------+---------------|
   |    32KB    |   Installed   |   Installed   | Not installed |
   |------------+---------------+---------------+---------------|
   |   128KB    | Not installed | Not installed |   Installed   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                        SRAM BANK 1                         |
   |------------------------------------------------------------|
   |            Size            |            Bank 1             |
   |----------------------------+-------------------------------|
   |            32KB            |          (4) 16K x 4          |
   |----------------------------+-------------------------------|
   |           128KB            |          (4) 64K x 4          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 SRAM BANK 1 CONFIGURATION                  |
   |------------------------------------------------------------|
   |    Size    |      R63      |      R64      |      R65      |
   |------------+---------------+---------------+---------------|
   |    32KB    |   Installed   |   Installed   | Not installed |
   |------------+---------------+---------------+---------------|
   |   128KB    | Not installed | Not installed |   Installed   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |               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/51960-2.png>
   

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

   +------------------------------------------------------------+
   |                 DIAGNOSTIC LED(S) (CON'T)                  |
   |------------------------------------------------------------|
   | LED | Color | Status |              Condition              |
   |-----+-------+--------+-------------------------------------|
   | D2  |  Red  |   On   |     Task processor 2 request in     |
   |     |       |        |              progress               |
   |-----+-------+--------+-------------------------------------|
   | D2  |  Red  |  Off   |   Task processor 2 request not in   |
   |     |       |        |              progress               |
   |-----+-------+--------+-------------------------------------|
   | D2  | Green |   On   | Task processor 2 grant in progress  |
   |-----+-------+--------+-------------------------------------|
   | D2  | Green |  Off   |    Task processor 2 grant not in    |
   |     |       |        |              progress               |
   |-----+-------+--------+-------------------------------------|
   | D3  |  Red  |   On   | MVIP processor request in progress  |
   |-----+-------+--------+-------------------------------------|
   | D3  |  Red  |  Off   |    MVIP processor request not in    |
   |     |       |        |              progress               |
   |-----+-------+--------+-------------------------------------|
   | D3  | Green |   On   |  MVIP processor grant in progress   |
   |-----+-------+--------+-------------------------------------|
   | D3  | Green |  Off   |     MVIP processor grant not in     |
   |     |       |        |              progress               |
   |-----+-------+--------+-------------------------------------|
   | D4  |  Red  |   On   |         Processor is reset          |
   |-----+-------+--------+-------------------------------------|
   | D4  |  Red  |  Off   |       Processor is not reset        |
   |-----+-------+--------+-------------------------------------|
   | D4  | Green |   On   |         SRAM is "not busy"          |
   |-----+-------+--------+-------------------------------------|
   | D4  | Green |  Off   |           SRAM is "busy"            |
   |-----+-------+--------+-------------------------------------|
   | D5  |  Red  |   On   |   Processor is transmitting data    |
   |-----+-------+--------+-------------------------------------|
   | D5  |  Red  |  Off   |     Processor is receiving data     |
   |-----+-------+--------+-------------------------------------|
   | D5  | Green |   On   |   Host is reading/writing to SRAM   |
   |-----+-------+--------+-------------------------------------|
   | D5  | Green |  Off   |   Processor is reading/writing to   |
   |     |       |        |                SRAM                 |
   |-----+-------+--------+-------------------------------------|
   | D6  |  Red  |   On   |         DSP chips are reset         |
   |-----+-------+--------+-------------------------------------|
   | D6  |  Red  |  Off   |       DSP chips are not reset       |
   |-----+-------+--------+-------------------------------------|
   | D8  | Green |   On   |   Diagnostics are being performed   |
   |-----+-------+--------+-------------------------------------|
   | D8  | Green |  Off   | Diagnostics are not being performed |
   |-----+-------+--------+-------------------------------------|
   | D9  | Green |   On   |     External power supply is on     |
   |-----+-------+--------+-------------------------------------|
   | D9  | Green |  Off   |    External power supply is off     |
   +------------------------------------------------------------+