CSS LABORATORIES, INC.
======================

   MAXSYS 486MTE/VL

   Processor    80486SX/80487SX/80486DX/80486DX2/Pentium          
                Overdrive                                         
   Processor    25/33/50(internal)/50/66(internal)MHz             
   Speed        
   Chip Set     OPTI                                              
   Max. Onboard 256MB (128MB on CPU module)                       
   DRAM         
   Cache        64/128/256/512KB                                  
   BIOS         AMI                                               
   Dimensions   330mm x 218mm                                     
   I/O Options  CPU module slot, 32-bit VESA local bus slot (1),  
                floppy drive interface, IDE interface, parallel   
                port, serial ports (2)                            
   NPU Options  4167                                              

<gopher://bitreich.org/I/th99/m/C-D/31499-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | Purpose          | Location | Purpose           | Location |
   |------------------+----------+-------------------+----------|
   | Speaker          |    J4    | Serial port 2     |   PJ4    |
   |------------------+----------+-------------------+----------|
   | Power LED &      |    J5    | IDE interface     |   PJ5    |
   | keylock          |          |                   |          |
   |------------------+----------+-------------------+----------|
   | IDE interface    |   J38    | Parallel port     |   PJ2A   |
   | LED              |          | (alternate)       |          |
   |------------------+----------+-------------------+----------|
   | Equipment panel  |   J39    | Serial port 1     |   PJ3A   |
   | connector        |          | (alternate)       |          |
   |------------------+----------+-------------------+----------|
   | IDE interface    |   J40    | Serial port 2     |   PJ4A   |
   | LED              |          | (alternate)       |          |
   |------------------+----------+-------------------+----------|
   | Turbo LED/reset  |   J41    | Keyboard          |   J11A   |
   | switch           |          | connector         |          |
   |                  |          | (alternate)       |          |
   |------------------+----------+-------------------+----------|
   | Floppy drive     |   PJ1    | Keyboard          |   J11B   |
   | interface        |          | connector         |          |
   |                  |          | (alternate)       |          |
   |------------------+----------+-------------------+----------|
   | Parallel port    |   PJ2    | CPU module slot   |   SL1    |
   |------------------+----------+-------------------+----------|
   | Serial port 1    |   PJ3    | 32-bit VESA Local |   SL2    |
   |                  |          | bus slot          |          |
   |------------------------------------------------------------|
   | Note: The keyboard, parallel and serial connections marked |
   | "alternate" are used for easier placement of cables. Do    |
   | not use a primary and an alternate connection jointly.     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |               Function               | Jumper |  Position  |
   |--------------------------------------+--------+------------|
   |>> | On board floppy controller       |   J1   | pins 2 & 3 |
   |   | enabled                          |        |   closed   |
   |---+----------------------------------+--------+------------|
   |   | On board floppy controller       |   J1   | pins 1 & 2 |
   |   | disabled                         |        |   closed   |
   |---+----------------------------------+--------+------------|
   |>> | On board IDE controller enabled  |   J2   | pins 2 & 3 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |   | On board IDE controller disabled |   J2   | pins 1 & 2 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |>> | CPU bus clock select synchronous |  JP1   | pins 1 & 2 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |   | CPU bus clock select             |  JP1   | pins 2 & 3 |
   |   | asynchronous                     |        |   closed   |
   |---+----------------------------------+--------+------------|
   |>> | Monitor type select color        |  JP9   | pins 2 & 3 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |   | Monitor type select monochrome   |  JP9   | pins 1 & 2 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |   | Factory configured - do not      |  JP20  |    Open    |
   |   | alter                            |        |            |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 SERIAL PORT CONFIGURATION                  |
   |------------------------------------------------------------|
   |  Port 1   |      PJ6       |      S0       |      S1       |
   |-----------+----------------+---------------+---------------|
   | Disabled  |      N/A       |  pins 1 & 2   |  pins 1 & 2   |
   |           |                |    closed     |    closed     |
   |-----------+----------------+---------------+---------------|
   | COM1 IRQ4 |   pins 1 & 2   |  pins 2 & 3   |  pins 2 & 3   |
   |           |     closed     |    closed     |    closed     |
   |-----------+----------------+---------------+---------------|
   | COM2 IRQ3 |   pins 1 & 3   |  pins 1 & 2   |  pins 2 & 3   |
   |           |     closed     |    closed     |    closed     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 SERIAL PORT CONFIGURATION                  |
   |------------------------------------------------------------|
   |  Port 2   |      PJ6       |      S2       |      S3       |
   |-----------+----------------+---------------+---------------|
   | Disabled  |      N/A       |  pins 1 & 2   |  pins 1 & 2   |
   |           |                |    closed     |    closed     |
   |-----------+----------------+---------------+---------------|
   | COM1 IRQ4 |   pins 2 & 4   |  pins 1 & 2   |  pins 2 & 3   |
   |           |     closed     |    closed     |    closed     |
   |-----------+----------------+---------------+---------------|
   | COM2 IRQ3 |   pins 3 & 4   |  pins 2 & 3   |  pins 2 & 3   |
   |           |     closed     |    closed     |    closed     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                PARALLEL PORT CONFIGURATION                 |
   |------------------------------------------------------------|
   |    Port     |      P0       |      P1       |     PRT      |
   |-------------+---------------+---------------+--------------|
   |  Disabled   |  pins 1 & 2   |  pins 1 & 2   |     N/A      |
   |             |    closed     |    closed     |              |
   |-------------+---------------+---------------+--------------|
   | LPT 1 IRQ7  |  pins 2 & 3   |  pins 1 & 2   |  pins 2 & 3  |
   |             |    closed     |    closed     |    closed    |
   |-------------+---------------+---------------+--------------|
   | LPT 2 IRQ5  |  pins 2 & 3   |  pins 2 & 3   |  pins 1 & 2  |
   |             |    closed     |    closed     |    closed    |
   |-------------+---------------+---------------+--------------|
   | LPT 3 IRQ 7 |  pins 1 & 2   |  pins 2 & 3   |  pins 2 & 3  |
   |             |    closed     |    closed     |    closed    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     DRAM CONFIGURATION                     |
   |------------------------------------------------------------|
   | Size  |   Bank 0    |   Bank 1   |   Bank 2   |   Bank 3   |
   |-------+-------------+------------+------------+------------|
   |  4MB  | (4) 1M x 9  |    NONE    |    NONE    |    NONE    |
   |-------+-------------+------------+------------+------------|
   |  8MB  | (4) 1M x 9  | (4) 1M x 9 |    NONE    |    NONE    |
   |-------+-------------+------------+------------+------------|
   | 12MB  | (4) 1M x 9  | (4) 1M x 9 | (4) 1M x 9 |    NONE    |
   |-------+-------------+------------+------------+------------|
   | 16MB  | (4) 1M x 9  | (4) 1M x 9 | (4) 1M x 9 | (4) 1M x 9 |
   |-------+-------------+------------+------------+------------|
   | 16MB  | (4) 4M x 9  |    NONE    |    NONE    |    NONE    |
   |-------+-------------+------------+------------+------------|
   | 20MB  | (4) 1M x 9  | (4) 4M x 9 |    NONE    |    NONE    |
   |-------+-------------+------------+------------+------------|
   | 24MB  | (4) 1M x 9  | (4) 1M x 9 | (4) 4M x 9 |    NONE    |
   |-------+-------------+------------+------------+------------|
   | 24MB  | (4) 1M x 9  | (4) 4M x 9 | (4) 1M x 9 |    NONE    |
   |-------+-------------+------------+------------+------------|
   | 28MB  | (4) 1M x 9  | (4) 1M x 9 | (4) 4M x 9 | (4) 1M x 9 |
   |-------+-------------+------------+------------+------------|
   | 28MB  | (4) 1M x 9  | (4) 4M x 9 | (4) 1M x 9 | (4) 1M x 9 |
   |-------+-------------+------------+------------+------------|
   | 32MB  | (4) 4M x 9  | (4) 4M x 9 |    NONE    |    NONE    |
   |-------+-------------+------------+------------+------------|
   | 36MB  | (4) 1M x 9  | (4) 4M x 9 | (4) 4M x 9 |    NONE    |
   |-------+-------------+------------+------------+------------|
   | 36MB  | (4) 4M x 9  | (4) 4M x 9 | (4) 1M x 9 |    NONE    |
   |-------+-------------+------------+------------+------------|
   | 40MB  | (4) 1M x 9  | (4) 1M x 9 | (4) 4M x 9 | (4) 4M x 9 |
   |-------+-------------+------------+------------+------------|
   | 40MB  | (4) 1M x 9  | (4) 4M x 9 | (4) 4M x 9 | (4) 1M x 9 |
   |-------+-------------+------------+------------+------------|
   | 40MB  | (4) 4M x 9  | (4) 4M x 9 | (4) 1M x 9 | (4) 1M x 9 |
   |-------+-------------+------------+------------+------------|
   | 48MB  | (4) 4M x 9  | (4) 4M x 9 | (4) 4M x 9 |    NONE    |
   |-------+-------------+------------+------------+------------|
   | 52MB  | (4) 1M x 9  | (4) 4M x 9 | (4) 4M x 9 | (4) 4M x 9 |
   |-------+-------------+------------+------------+------------|
   | 52MB  | (4) 4M x 9  | (4) 4M x 9 | (4) 4M x 9 | (4) 1M x 9 |
   |-------+-------------+------------+------------+------------|
   | 64MB  | (4) 4M x 9  | (4) 4M x 9 | (4) 4M x 9 | (4) 4M x 9 |
   |-------+-------------+------------+------------+------------|
   | 64MB  | (4) 16M x 9 |    NONE    |    NONE    |    NONE    |
   |-------+-------------+------------+------------+------------|
   | 128MB | (4) 16M x 9 | (4) 16M x  |    NONE    |    NONE    |
   |       |             |     9      |            |            |
   |-------+-------------+------------+------------+------------|
   | 196MB | (4) 16M x 9 | (4) 16M x  | (4) 16M x  |    NONE    |
   |       |             |     9      |     9      |            |
   |-------+-------------+------------+------------+------------|
   | 256MB | (4) 16M x 9 | (4) 16M x  | (4) 16M x  | (4) 16M x  |
   |       |             |     9      |     9      |     9      |
   |------------------------------------------------------------|
   | Note: Banks 2 & 3 are located on the CPU module board.     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                  CPU SPEED CONFIGURATION                   |
   |------------------------------------------------------------|
   |       Speed        |        JP6        |        JP7        |
   |--------------------+-------------------+-------------------|
   |       25MHz        |       Open        |       Open        |
   |--------------------+-------------------+-------------------|
   |       33MHz        |       Open        |      Closed       |
   |--------------------+-------------------+-------------------|
   |       50iMHz       |       Open        |       Open        |
   |--------------------+-------------------+-------------------|
   |       50MHz        |      Closed       |      Closed       |
   |--------------------+-------------------+-------------------|
   |       66iMHz       |       Open        |      Closed       |
   +------------------------------------------------------------+

<gopher://bitreich.org/I/th99/m/C-D/31499-2.png>
   

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |               Function                | Jumper  | Position |
   |---------------------------------------+---------+----------|
   |>> | Factory configured - do not alter |   JP8   |   Open   |
   |---+-----------------------------------+---------+----------|
   |>> | Factory configured - do not alter |  JP77   |   Open   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 BASE MEMORY CONFIGURATION                  |
   |------------------------------------------------------------|
   |      Memory       |        JP20        |       JP21        |
   |-------------------+--------------------+-------------------|
   |       384KB       | pins 2 & 3 closed  |       Open        |
   |-------------------+--------------------+-------------------|
   |       512KB       | pins 2 & 3 closed  |      Closed       |
   |-------------------+--------------------+-------------------|
   |       640KB       | pins 1 & 2 closed  |        N/A        |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    CACHE CONFIGURATION                     |
   |------------------------------------------------------------|
   |       Size       |       Bank 0       |       Bank 1       |
   |------------------+--------------------+--------------------|
   |       64KB       |     (4) 8K x 8     |     (4) 8K x 8     |
   |------------------+--------------------+--------------------|
   |      128KB       |    (4) 16K x 8     |    (4) 16K x 8     |
   |------------------+--------------------+--------------------|
   |      256KB       |    (4) 32K x 8     |    (4) 32K x 8     |
   |------------------+--------------------+--------------------|
   |      512KB       |    (4) 64K x 8     |    (4) 64K x 8     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 CACHE CONFIGURATION (TAG)                  |
   |------------------------------------------------------------|
   | Size  |     U55     |    U56     |           U72           |
   |-------+-------------+------------+-------------------------|
   | 64KB  | (1) 8K x 8  |    NONE    | (1) 16K x 1 or (1) 64K  |
   |       |             |            |           x 1           |
   |-------+-------------+------------+-------------------------|
   | 128KB | (1) 8K x 8  |    NONE    | (1) 16K x 1 or (1) 64K  |
   |       |             |            |           x 1           |
   |-------+-------------+------------+-------------------------|
   | 256KB | (1) 8K x 8  | (1) 8K x 8 | (1) 16K x 1 or (1) 64K  |
   |       |             |            |           x 1           |
   |-------+-------------+------------+-------------------------|
   | 512KB | (1) 32K x 8 |    NONE    |       (1) 64K x 1       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 CACHE JUMPER CONFIGURATION                 |
   |------------------------------------------------------------|
   | Size  |  JP2  |  JP3  |  JP4  |  JP5  | JP16 | JP17 | JP18 |
   |-------+-------+-------+-------+-------+------+------+------|
   | 64KB  | 2 & 3 | Open  | Open  | Open  | Open | Open | Open |
   |-------+-------+-------+-------+-------+------+------+------|
   | 128KB | 1 & 2 |Closed | Open  | Open  |Closed| Open | Open |
   |-------+-------+-------+-------+-------+------+------+------|
   | 256KB | 2 & 3 |Closed |Closed | Open  |Closed|Closed| Open |
   |-------+-------+-------+-------+-------+------+------+------|
   | 512KB | 1 & 2 |Closed |Closed |Closed |Closed|Closed|Closed|
   |------------------------------------------------------------|
   |Note: Pins designated should be in the closed position.     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                  CPU SPEED CONFIGURATION                   |
   |------------------------------------------------------------|
   |           Speed            |             JP12              |
   |----------------------------+-------------------------------|
   |           25MHz            |       pins 2 & 3 closed       |
   |----------------------------+-------------------------------|
   |           33MHz            |       pins 2 & 3 closed       |
   |----------------------------+-------------------------------|
   |           50iMHz           |       pins 2 & 3 closed       |
   |----------------------------+-------------------------------|
   |           50MHz            |       pins 1 & 2 closed       |
   |----------------------------+-------------------------------|
   |           66iMHz           |       pins 2 & 3 closed       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                   CPU TYPE CONFIGURATION                   |
   |------------------------------------------------------------|
   |    Type     |           JP10           |       JP11        |
   |-------------+--------------------------+-------------------|
   |   80486SX   |    pins 2 & 3 closed     |       Open        |
   |-------------+--------------------------+-------------------|
   |   80487SX   | pins 1 & 2, 3 & 4 closed | pins 1 & 2 closed |
   |-------------+--------------------------+-------------------|
   | 80486DX/DX2 | pins 1 & 2, 3 & 4 closed | pins 2 & 3 closed |
   |-------------+--------------------------+-------------------|
   |  Overdrive  | pins 1 & 2, 3 & 4 closed | pins 1 & 2 closed |
   +------------------------------------------------------------+