TMC RESEARCH CORPORATION
========================

   IAT48PX

   Processor    80486SX/80487SX/80486DX/ODP486SX/80486DX2         
   Processor    20/25/33/50 (Internal)/50/60 (Internal)MHz        
   Speed        
   Chip Set     OPTI                                              
   Max. onboard 32MB                                              
   DRAM         
   SRAM Cache   64/128/256KB                                      
   BIOS         AMI                                               
   Dimensions   330mm x 218mm                                     
   I/O Options  Floppy drive interface, floppy drive interface,   
                parallel ports (2), serial ports (2)              
   NPU Options  None                                              

<gopher://bitreich.org/I/th99/m/S-T/31590-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | Purpose           | Location | Purpose          | Location |
   |-------------------+----------+------------------+----------|
   | Speaker           |   J1A    | Serial port      |    J6    |
   |                   |          | (COM1) DB-9      |          |
   |-------------------+----------+------------------+----------|
   | Power LED &       |   J1B    | Parallel port    |    J7    |
   | keylock           |          | DP-9             |          |
   |-------------------+----------+------------------+----------|
   | Not used          |   J1C    | 10-pin header    |    J8    |
   |                   |          | serial port      |          |
   |                   |          | (COM2)           |          |
   |-------------------+----------+------------------+----------|
   | Turbo switch      |   J1D    | 10-pin header    |    J9    |
   |                   |          | serial port      |          |
   |                   |          | (COM1)           |          |
   |-------------------+----------+------------------+----------|
   | Turbo LED         |   J1E    | Parallel port    |   J10    |
   |                   |          | 10-pin header    |          |
   |-------------------+----------+------------------+----------|
   | Reset switch      |   J1F    | No function      |   J17    |
   |-------------------+----------+------------------+----------|
   | IDE interface LED | J1G, J2  | Floppy drive     |   J18    |
   |                   |          | interface        |          |
   |-------------------+----------+------------------+----------|
   | External battery  |    J4    | IDE interface    |   J19    |
   |-------------------+----------+------------------+----------|
   | Serial port       |    J5    | 16-bit riser     |    S1    |
   | (COM2) DB-9       |          | card             |          |
   |------------------------------------------------------------|
   | Note: Depending on the specifications, the IAT48PX will    |
   | have either 10-pin header serial ports or the     DB-9     |
   | serial ports.                                              |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |             Function              |  Jumper   |  Position  |
   |-----------------------------------+-----------+------------|
   |>> | CMOS memory normal operation  |    JP1    | pins 2 & 3 |
   |   | (Internal Battery)            |           |   closed   |
   |---+-------------------------------+-----------+------------|
   |   | CMOS memory normal operation  |    JP1    |    Open    |
   |   | (External Battery)            |           |            |
   |---+-------------------------------+-----------+------------|
   |   | CMOS memory clear             |    JP1    | pins 1 & 2 |
   |   |                               |           |   closed   |
   |---+-------------------------------+-----------+------------|
   |>> | Monitor type select color     |    JP2    |   Closed   |
   |---+-------------------------------+-----------+------------|
   |   | Monitor type select           |    JP2    |    Open    |
   |   | monochrome                    |           |            |
   |---+-------------------------------+-----------+------------|
   |>> | Floppy drive interface (J18)  |    JP3    |   Closed   |
   |   | enabled                       |           |            |
   |---+-------------------------------+-----------+------------|
   |   | Floppy drive interface (J18)  |    JP3    |    Open    |
   |   | disabled                      |           |            |
   |---+-------------------------------+-----------+------------|
   |>> | IDE interface enabled         | JP4 & JP5 |   Closed   |
   |---+-------------------------------+-----------+------------|
   |   | IDE interface disabled        | JP4 & JP5 |    Open    |
   |---+-------------------------------+-----------+------------|
   |>> | I/O bus speed select ATCLK/4  |    JP6    |    Open    |
   |---+-------------------------------+-----------+------------|
   |   | I/O bus speed select ATCLK/6  |    JP6    |   Closed   |
   |---+-------------------------------+-----------+------------|
   |>> | CPU clock select single       |    JP7    | pins 1 & 2 |
   |   | frequency                     |           |   closed   |
   |---+-------------------------------+-----------+------------|
   |   | CPU speed select dual         |    JP7    | pins 2 & 3 |
   |   | frequency                     |           |   closed   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     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        |
   |------------------+--------------------+--------------------|
   |       5MB        |     (4) 1M x 9     |    (4) 256K x 9    |
   |------------------+--------------------+--------------------|
   |       8MB        |     (4) 1M x 9     |     (4) 1M x 9     |
   |------------------+--------------------+--------------------|
   |       16MB       |     (4) 4M x 9     |        NONE        |
   |------------------+--------------------+--------------------|
   |       20MB       |     (4) 4M x 9     |     (4) 1M x 9     |
   |------------------+--------------------+--------------------|
   |       32MB       |     (4) 4M x 9     |     (4) 4M x 9     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    CACHE CONFIGURATION                     |
   |------------------------------------------------------------|
   | Size  |   Bank 0    |   Bank 1   |    U45     | U44 (TAG)  |
   |-------+-------------+------------+------------+------------|
   | 64KB  | (4) 8K x 8  | (4) 8K x 8 | (1) 8K x 8 | (1) 4K x 4 |
   |-------+-------------+------------+------------+------------|
   | 128KB | (4) 32K x 8 |    None    | (1) 8K x 8 | (1) 4K x 4 |
   |-------+-------------+------------+------------+------------|
   | 256KB | (4) 32K x 8 | (4) 32K x  | (1) 8K x 8 | (1) 4K x 4 |
   |       |             |     8      |            |            |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |               CACHE RN SOCKET CONFIGURATION                |
   |------------------------------------------------------------|
   |    Size    |      RND      |      RNE      |      RNF      |
   |------------+---------------+---------------+---------------|
   |    64KB    |   Installed   | Not installed | Not installed |
   |------------+---------------+---------------+---------------|
   |   128KB    | Not installed |   Installed   | Not installed |
   |------------+---------------+---------------+---------------|
   |   256KB    | Not installed | Not installed |   Installed   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 SERIAL PORT CONFIGURATION                  |
   |------------------------------------------------------------|
   |      COM1       |    COM2    |             RNH             |
   |-----------------+------------+-----------------------------|
   |>> |    COM1     |    COM2    | Installed on 1, 2, 3, and 4 |
   |---+-------------+------------+-----------------------------|
   |   |    COM1     |  Disabled  | Installed on 2, 3, 4, and 5 |
   |---+-------------+------------+-----------------------------|
   |   |  Disabled   |    COM2    | Installed on 3, 4, 5, and 6 |
   |---+-------------+------------+-----------------------------|
   |   |  Disabled   |  Disabled  | Installed on 4, 5, 6, and 7 |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                PARALLEL PORT CONFIGURATION                 |
   |------------------------------------------------------------|
   |      LPT      |   Address    |             RNG             |
   |---------------+--------------+-----------------------------|
   |>> |     1     | 3BCh - 3BEh  | Installed on 2, 3, 4, and 5 |
   |---+-----------+--------------+-----------------------------|
   |   |     2     | 378h - 37Fh  | Installed on 1, 2, 3, and 4 |
   |---+-----------+--------------+-----------------------------|
   |   | Disabled  |     N/A      | Installed on 4, 5, 6, and 7 |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                   CPU TYPE CONFIGURATION                   |
   |------------------------------------------------------------|
   |    Type    |      RNA      |      RNB      |      RNC      |
   |------------+---------------+---------------+---------------|
   |  80486SX   | Not installed | Not installed |   Installed   |
   |------------+---------------+---------------+---------------|
   |  80487SX   | Not installed |   Installed   | Not installed |
   |------------+---------------+---------------+---------------|
   |  80486DX   |   Installed   | Not installed | Not installed |
   |------------+---------------+---------------+---------------|
   |  ODP486SX  | Not installed |   Installed   | Not installed |
   |------------+---------------+---------------+---------------|
   |  80486DX2  |   Installed   | Not installed | Not installed |
   +------------------------------------------------------------+