NORTHGATE COMPUTER SYSTEMS, INC.
================================

   SLIMLINE SP

   Processor        80386DX/80486DX                               
   Processor Speed  25/33MHz                                      
   Chip Set         VLSI                                          
   Max. Onboard     64MB                                          
   DRAM             
   Cache            64/256KB                                      
   BIOS             AMI                                           
   Dimensions       350mm x 304mm                                 
   I/O Options      Proprietary CPU/NPU module slot, parallel     
                    port, serial ports (2), floppy drive          
                    interface, IDE interface, VGA port            
   NPU Options      80387/3167/4167 (on external CPU/NPU card)    

<gopher://bitreich.org/I/th99/m/M-O/30670-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | Purpose             | Location | Purpose        | Location |
   |---------------------+----------+----------------+----------|
   | Proprietary CPU     |   CPU1   | Serial port 1  |    J9    |
   | module              |          |                |          |
   |---------------------+----------+----------------+----------|
   | VGA port            |    J1    | Serial port 2  |   J10    |
   |---------------------+----------+----------------+----------|
   | External battery    |    J2    | Parallel port  |   J15    |
   |                     |          | LPT1           |          |
   |---------------------+----------+----------------+----------|
   | Turbo LED           |    J4    | Floppy drive   |   J16    |
   |                     |          | interface      |          |
   |---------------------+----------+----------------+----------|
   | Power LED & keylock |    J5    | IDE interface  |   J17    |
   |---------------------+----------+----------------+----------|
   | Reset switch        |    J6    | Speaker        |   J19    |
   |---------------------+----------+----------------+----------|
   | IDE interface LED   |    J8    | Riser card     |    R1    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |            Function             |   Jumper    |  Position  |
   |---------------------------------+-------------+------------|
   |>> | Floppy drive write precomp  |     W2      | pins 2 & 3 |
   |   | select alternate            |             |   closed   |
   |---+-----------------------------+-------------+------------|
   |   | Floppy drive write precomp  |     W2      | pins 1 & 2 |
   |   | select normal               |             |   closed   |
   |---+-----------------------------+-------------+------------|
   |>> | Factory configured - do not |     W3      |    N/A     |
   |   | alter                       |             |            |
   |---+-----------------------------+-------------+------------|
   |>> | Monitor type select         |     W4      | pins 1 & 2 |
   |   | monochrome                  |             |   closed   |
   |---+-----------------------------+-------------+------------|
   |   | Monitor type select color   |     W4      | pins 2 & 3 |
   |   |                             |             |   closed   |
   |---+-----------------------------+-------------+------------|
   |>> | CMOS memory normal          |     W8      |    Open    |
   |   | operation                   |             |            |
   |---+-----------------------------+-------------+------------|
   |   | CMOS memory clear           |     W8      |   Closed   |
   |---+-----------------------------+-------------+------------|
   |>> | Parallel port mode select   |     W13     | pins 2 & 3 |
   |   | bi-directional              |             |   closed   |
   |---+-----------------------------+-------------+------------|
   |   | Parallel port mode select   |     W13     | pins 1 & 2 |
   |   | input only                  |             |   closed   |
   |---+-----------------------------+-------------+------------|
   |>> | Floppy drive mode select    |     W18     | pins 1 & 2 |
   |   | single speed                |             |   closed   |
   |---+-----------------------------+-------------+------------|
   |   | Floppy drive mode select    |     W18     | pins 2 & 3 |
   |   | dual speed                  |             |   closed   |
   |---+-----------------------------+-------------+------------|
   |>> | Factory configured - do not |     W27     |    N/A     |
   |   | alter                       |             |            |
   |---+-----------------------------+-------------+------------|
   |>> | Factory configured - do not |     W29     |    N/A     |
   |   | alter                       |             |            |
   |---+-----------------------------+-------------+------------|
   |>> | Factory configured - do not | SW1 pins 1  |    N/A     |
   |   | alter                       |     & 2     |            |
   |---+-----------------------------+-------------+------------|
   |>> | Factory configured - do not | SW1 pins 5  |    N/A     |
   |   | alter                       |     & 6     |            |
   |---+-----------------------------+-------------+------------|
   |>> | VGA BIOS shadowing enabled  | SW1 pins 11 |   Closed   |
   |   |                             |    & 12     |            |
   |---+-----------------------------+-------------+------------|
   |   | VGA BIOS shadowing disabled | SW1 pins 11 |    Open    |
   |   |                             |    & 12     |            |
   |---+-----------------------------+-------------+------------|
   |>> | BIOS shadowing enabled      | SW1 pins 11 |   Closed   |
   |   |                             |    & 12     |            |
   |---+-----------------------------+-------------+------------|
   |   | BIOS shadowing disabled     | SW1 pins 11 |    Open    |
   |   |                             |    & 12     |            |
   |---+-----------------------------+-------------+------------|
   |>> | IRQ6 enabled                | SW2 pins 9  |   Closed   |
   |   |                             |    & 10     |            |
   |---+-----------------------------+-------------+------------|
   |   | IRQ6 disabled               | SW2 pins 9  |    Open    |
   |   |                             |    & 10     |            |
   |---+-----------------------------+-------------+------------|
   |>> | Floppy drive interface      | SW3 pins 1  |    Open    |
   |   | enabled                     |     & 2     |            |
   |---+-----------------------------+-------------+------------|
   |   | Floppy drive interface      | SW3 pins 1  |   Closed   |
   |   | disabled                    |     & 2     |            |
   |------------------------------------------------------------|
   | Note:The locations of W8 & W29 are unidentified.           |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     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     |
   |------------------+--------------------+--------------------|
   |       16MB       |     (4) 4M x 9     |        NONE        |
   |------------------+--------------------+--------------------|
   |       32MB       |     (4) 4M x 9     |     (4) 4M x 9     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |              DRAM JUMPER/SWITCH CONFIGURATION              |
   |------------------------------------------------------------|
   |   Size   |            SW1            |    W5    |    W6    |
   |----------+---------------------------+----------+----------|
   |   1MB    |  3 & 4, 17 & 18, 19 & 20  |  2 & 3   |  2 & 3   |
   |----------+---------------------------+----------+----------|
   |   2MB    |     17 & 18, 19 & 20      |  2 & 3   |  2 & 3   |
   |----------+---------------------------+----------+----------|
   |   4MB    |      3 & 4, 17 & 18       |  1 & 2   |  2 & 3   |
   |----------+---------------------------+----------+----------|
   |   8MB    |          17 & 18          |  1 & 2   |  2 & 3   |
   |----------+---------------------------+----------+----------|
   |   16MB   |           3 & 4           |  1 & 2   |  1 & 2   |
   |----------+---------------------------+----------+----------|
   |   32MB   |           Open            |  1 & 2   |  1 & 2   |
   |------------------------------------------------------------|
   | Note: Pins designated should be in the closed position.    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     IDE CONFIGURATION                      |
   |------------------------------------------------------------|
   |      Setting       |       SW21        |        W20        |
   |--------------------+-------------------+-------------------|
   |      Enabled       |      Closed       |       Open        |
   |--------------------+-------------------+-------------------|
   |      Disabled      |       Open        |      Closed       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |              PARALLEL PORT IRQ CONFIGURATION               |
   |------------------------------------------------------------|
   |            IRQ             |              SW2              |
   |----------------------------+-------------------------------|
   |            IRQ5            |       pins 5 & 6 closed       |
   |----------------------------+-------------------------------|
   |            IRQ7            |       pins 7 & 8 closed       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                PARALLEL PORT CONFIGURATION                 |
   |------------------------------------------------------------|
   |          Setting           |              SW3              |
   |----------------------------+-------------------------------|
   |         LPT1/3BCh          |      pins 9 & 10 closed       |
   |----------------------------+-------------------------------|
   |         LPT1/378h          |             Open              |
   |----------------------------+-------------------------------|
   |         LPT2/278h          |       pins 7 & 8 closed       |
   |----------------------------+-------------------------------|
   |          Disabled          |   pins 7 & 8, 9 & 10 closed   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                SERIAL PORT 1 CONFIGURATION                 |
   |------------------------------------------------------------|
   |     Setting      |        SW2         |        SW3         |
   |------------------+--------------------+--------------------|
   |     Enabled      | pins 1 & 2 closed  |        Open        |
   |------------------+--------------------+--------------------|
   |     Disabled     |        Open        | pins 5 & 6 closed  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                SERIAL PORT 2 CONFIGURATION                 |
   |------------------------------------------------------------|
   |     Setting      |        SW2         |        SW3         |
   |------------------+--------------------+--------------------|
   |     Enabled      | pins 3 & 4 closed  |        Open        |
   |------------------+--------------------+--------------------|
   |     Disabled     |        Open        | pins 3 & 4 closed  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    VIDEO CONFIGURATION                     |
   |------------------------------------------------------------|
   | Setting  |             SW5             |        W19        |
   |----------+-----------------------------+-------------------|
   | Enabled  |  pins 1 & 2, 3 & 4, 5 & 6   | pins 1 & 2 closed |
   |          |           closed            |                   |
   |----------+-----------------------------+-------------------|
   | Disabled |            Open             | pins 2 & 3 closed |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     BIOS CONFIGURATION                     |
   |------------------------------------------------------------|
   |                Setting                |        SW1         |
   |---------------------------------------+--------------------|
   |     F000-FFFF (VGA BIOS disabled)     | pins 7 & 8, 9 & 10 |
   |                                       |       closed       |
   |---------------------------------------+--------------------|
   |    F000-FFFF, E000-EFFF (VGA BIOS     | pins 7 & 8 closed  |
   |   disabled, BIOS shadowing enabled)   |                    |
   |---------------------------------------+--------------------|
   |    F000-FFFF VGA BIOS at C000-C7FF    | pins 9 & 10 closed |
   |---------------------------------------+--------------------|
   | F000-FFFF VGA BIOS at C000-C7FF, IDE  | pins 9 & 10 closed |
   |        interface at C800-CFFF         |                    |
   +------------------------------------------------------------+

<gopher://bitreich.org/I/th99/m/M-O/30670-2.png>
   

   +------------------------------------------------------------+
   |                    CACHE CONFIGURATION                     |
   |------------------------------------------------------------|
   |            Size            |            Bank 0             |
   |----------------------------+-------------------------------|
   |            64KB            |          (8) 8K x 8           |
   |----------------------------+-------------------------------|
   |           256KB            |          (8) 32K x 8          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 CACHE JUMPER CONFIGURATION                 |
   |------------------------------------------------------------|
   |            Size            |              W1               |
   |----------------------------+-------------------------------|
   |            64KB            |             Open              |
   |----------------------------+-------------------------------|
   |           256KB            |   pins 1 & 2, 3 & 4 closed    |
   +------------------------------------------------------------+

<gopher://bitreich.org/I/th99/m/M-O/30670-3.png>
   

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |    Setting    |      W3      |      W4      |      W5      |
   |---------------+--------------+--------------+--------------|
   |  Burst mode   |  pins 2 & 3  |  pins 2 & 3  |  pins 1 & 2  |
   |    enabled    |    closed    |    closed    |    closed    |
   |---------------+--------------+--------------+--------------|
   |  Burst mode   |  pins 1 & 2  |  pins 1 & 2  |  pins 1 & 2  |
   |    enabled    |    closed    |    closed    |    closed    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    CACHE CONFIGURATION                     |
   |------------------------------------------------------------|
   |            Size            |            Bank 0             |
   |----------------------------+-------------------------------|
   |            64KB            |          (8) 8K x 8           |
   |----------------------------+-------------------------------|
   |           256KB            |          (8) 32K x 8          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 CACHE JUMPER CONFIGURATION                 |
   |------------------------------------------------------------|
   | Size  |     W1     |     W2     |            W5            |
   |-------+------------+------------+--------------------------|
   | 64KB  | pins 1 & 2 | pins 1 & 2 |           Open           |
   |       |   closed   |   closed   |                          |
   |-------+------------+------------+--------------------------|
   | 256KB | pins 2 & 3 | pins 2 & 3 | pins 3 & 4, 5 & 6 closed |
   |       |   closed   |   closed   |                          |
   +------------------------------------------------------------+