SAMSUNG ELECTRONICS AMERICA, INC.
=================================

   SD820

   Processor         80386SX                                      
   Processor Speed   25MHz                                        
   Chip Set          Unidentified                                 
   Max. Onboard DRAM 8MB                                          
   Cache             64KB                                         
   BIOS              Phoenix                                      
   Dimensions        330mm x 218mm                                
   I/O Options       32-bit external memory slots (2)             
   NPU Options       80387SX/3167                                 

<gopher://bitreich.org/I/th99/m/S-T/32014-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | Purpose        | Location | Purpose             | Location |
   |----------------+----------+---------------------+----------|
   | Serial port 1  |    J1    | Reset switch        |   J24    |
   |----------------+----------+---------------------+----------|
   | Serial port 2  |    J2    | Speaker             |   J25    |
   |----------------+----------+---------------------+----------|
   | Parallel port  |    J4    | Front panel         |   J26    |
   |                |          | connector           |          |
   |----------------+----------+---------------------+----------|
   | Serial port    |    J5    | 32-bit external     |  SL1 &   |
   | header         |          | memory card slots   |   SL2    |
   |----------------+----------+---------------------+----------|
   | Serial port    |    J6    |                     |          |
   | header         |          |                     |          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |             Function              |  Jumper   |  Position  |
   |-----------------------------------+-----------+------------|
   |>> | Printer acknowledge type      |    J7     | pins 2 & 3 |
   |   | select trailing edge          |           |   closed   |
   |---+-------------------------------+-----------+------------|
   |   | Printer acknowledge type      |    J7     | pins 1 & 2 |
   |   | select leading edge           |           |   closed   |
   |---+-------------------------------+-----------+------------|
   |>> | Parallel printer port enabled |    J8     | pins 1 & 2 |
   |   | (LPT 1)                       |           |   closed   |
   |---+-------------------------------+-----------+------------|
   |   | Parallel printer port         |    J8     | pins 2 & 3 |
   |   | disabled (LPT 1)              |           |   closed   |
   |---+-------------------------------+-----------+------------|
   |>> | Parallel printer port         |    J9     | pins 2 & 3 |
   |   | disabled (LPT 2)              |           |   closed   |
   |---+-------------------------------+-----------+------------|
   |   | Parallel printer port enabled |    J9     | pins 1 & 2 |
   |   | (LPT 2)                       |           |   closed   |
   |---+-------------------------------+-----------+------------|
   |>> | Serial port enabled (COM 1 &  | J10 & J11 | pins 1 & 2 |
   |   | COM 2)                        |           |   closed   |
   |---+-------------------------------+-----------+------------|
   |   | Serial port disabled (COM 1 & | J10 & J11 | pins 2 & 3 |
   |   | COM 2)                        |           |   closed   |
   |---+-------------------------------+-----------+------------|
   |>> | Monitor type select color     |    J12    | pins 2 & 3 |
   |   |                               |           |   closed   |
   |---+-------------------------------+-----------+------------|
   |   | Monitor type select           |    J12    | pins 1 & 2 |
   |   | monochrome                    |           |   closed   |
   |---+-------------------------------+-----------+------------|
   |>> | Factory configured - do not   |    J13    |    Open    |
   |   | alter                         |           |            |
   |---+-------------------------------+-----------+------------|
   |>> | ROM size select 64K           |    J14    | pins 1 & 2 |
   |   |                               |           |   closed   |
   |---+-------------------------------+-----------+------------|
   |   | ROM size select 128K          |    J14    | pins 2 & 3 |
   |   |                               |           |   closed   |
   |---+-------------------------------+-----------+------------|
   |>> | Factory configured - do not   |    J15    |    Open    |
   |   | alter                         |           |            |
   |---+-------------------------------+-----------+------------|
   |>> | DRAM speed select 100 ns      |    J22    | pins 1 & 2 |
   |   |                               |           |   closed   |
   |---+-------------------------------+-----------+------------|
   |   | DRAM speed select 85 ns       |    J22    | pins 2 & 3 |
   |   |                               |           |   closed   |
   |---+-------------------------------+-----------+------------|
   |>> | Factory configured - do not   |    J23    |    Open    |
   |   | alter                         |           |            |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     DRAM CONFIGURATION                     |
   |------------------------------------------------------------|
   |       Size       |       Bank 0       |       Bank 1       |
   |------------------+--------------------+--------------------|
   |       1MB        |    (4) 256K x 9    |        NONE        |
   |------------------+--------------------+--------------------|
   |       2MB        |    (4) 256K x 9    |    (4) 256K x 9    |
   |------------------+--------------------+--------------------|
   |       4MB        |     (4) 1M x 9     |        NONE        |
   |------------------+--------------------+--------------------|
   |       8MB        |     (4) 1M x 9     |     (4) 1M x 9     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 DRAM JUMPER CONFIGURATION                  |
   |------------------------------------------------------------|
   | Size |     J16      |    J17     |    J18     |    J19     |
   |------+--------------+------------+------------+------------|
   | 1MB  |  pins 2 & 3  | pins 2 & 3 | pins 2 & 3 | pins 2 & 3 |
   |      |    closed    |   closed   |   closed   |   closed   |
   |------+--------------+------------+------------+------------|
   | 2MB  |  pins 2 & 3  | pins 1 & 2 | pins 1 & 2 | pins 2 & 3 |
   |      |    closed    |   closed   |   closed   |   closed   |
   |------+--------------+------------+------------+------------|
   | 4MB  |  pins 1 & 2  | pins 2 & 3 | pins 2 & 3 | pins 1 & 2 |
   |      |    closed    |   closed   |   closed   |   closed   |
   |------+--------------+------------+------------+------------|
   | 8MB  |  pins 1 & 2  | pins 1 & 2 | pins 2 & 3 | pins 1 & 2 |
   |      |    closed    |   closed   |   closed   |   closed   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                  DRAM TYPE CONFIGURATION                   |
   |------------------------------------------------------------|
   |       Type        |        J20         |        J21        |
   |-------------------+--------------------+-------------------|
   |   Static column   | pins 2 & 3 closed  | pins 1 & 2 closed |
   |-------------------+--------------------+-------------------|
   |  Fast page mode   | pins 2 & 3 closed  | pins 2 & 3 closed |
   |-------------------+--------------------+-------------------|
   | Standard RAS/CAS  | pins 1 & 2 closed  | pins 1 & 2 closed |
   +------------------------------------------------------------+