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

   SLIMLINE ZXP

   Processor    80486SX/80487SX/80486DX/ODP486SX/80486DX2         
   Processor    16/20/25/33/50 (Internal)/66 (Internal)MHz        
   Speed        
   Chip Set     OPTI                                              
   Max. onboard 128MB                                             
   DRAM         
   Cache        None                                              
   BIOS         AMI                                               
   Dimensions   330mm x 218mm                                     
   I/O Options  Floppy drive interface, IDE interface, parallel   
                port,                                             
                                                                  
                riser card, serial ports (2), VGA port            
   NPU Options  None                                              

<gopher://bitreich.org/I/th99/m/M-O/31588-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | Purpose              | Location | Purpose       | Location |
   |----------------------+----------+---------------+----------|
   | Parallel port        |   CN1    | Turbo LED     |    P1    |
   |----------------------+----------+---------------+----------|
   | Serial port (COM1)   |   CN2    | Power LED &   |    P2    |
   |                      |          | keylock       |          |
   |----------------------+----------+---------------+----------|
   | Serial port (COM2)   |   CN3    | Speaker       |    P3    |
   |----------------------+----------+---------------+----------|
   | VGA port             |   CN4    | IDE interface |    P4    |
   |                      |          | LED           |          |
   |----------------------+----------+---------------+----------|
   | IDE interface        |   CN5    | Reset switch  |    P5    |
   |----------------------+----------+---------------+----------|
   | Floppy drive         |   CN6    | Riser Card    |    S1    |
   | interface            |          |               |          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |            Function             | Jumper/Switch | Position |
   |---------------------------------+---------------+----------|
   |>> | Onboard video disabled      |      J5       |  Closed  |
   |---+-----------------------------+---------------+----------|
   |   | Onboard video enabled       |      J5       |   Open   |
   |---+-----------------------------+---------------+----------|
   |>> | Monitor type select color   |      J11      |  Closed  |
   |---+-----------------------------+---------------+----------|
   |   | Monitor type select         |      J11      |   Open   |
   |   | monochrome                  |               |          |
   |---+-----------------------------+---------------+----------|
   |>> | Parallel port select        |      J12      |  Closed  |
   |   | uni-directional (printer)   |               |          |
   |---+-----------------------------+---------------+----------|
   |   | Parallel port select        |      J12      |   Open   |
   |   | bi-directional              |               |          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     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        |
   |------------------+--------------------+--------------------|
   |       17MB       |     (4) 4M x 9     |    (4) 256K x 9    |
   |------------------+--------------------+--------------------|
   |       20MB       |     (4) 4M x 9     |     (4) 1M x 9     |
   |------------------+--------------------+--------------------|
   |       32MB       |     (4) 4M x 9     |     (4) 4M x 9     |
   |------------------+--------------------+--------------------|
   |       64MB       |    (4) 16M x 9     |        NONE        |
   |------------------+--------------------+--------------------|
   |       65MB       |    (4) 16M x 9     |    (4) 256K x 9    |
   |------------------+--------------------+--------------------|
   |       68MB       |    (4) 16M x 9     |     (4) 1M x 9     |
   |------------------+--------------------+--------------------|
   |       80MB       |    (4) 16M x 9     |     (4) 4M x 9     |
   |------------------+--------------------+--------------------|
   |      128MB       |    (4) 16M x 9     |    (4) 16M x 9     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     VRAM CONFIGURATION                     |
   |------------------------------------------------------------|
   |       Size       |       Bank 0       |       Bank 1       |
   |------------------+--------------------+--------------------|
   |      512KB       |     (8) 8K x 8     |    Banks 0 & 1     |
   |------------------+--------------------+--------------------|
   |      1024KB      |    (4) 32K x 8     |       Bank 0       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 VRAM JUMPER CONFIGURATION                  |
   |------------------------------------------------------------|
   |        Size        |        J6         |        J7         |
   |--------------------+-------------------+-------------------|
   |       512KB        |        On         |        Off        |
   |--------------------+-------------------+-------------------|
   |       1024KB       |        Off        |        On         |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                  CPU SPEED CONFIGURATION                   |
   |------------------------------------------------------------|
   |  Speed  |       J8       |       J9       |      J10       |
   |---------+----------------+----------------+----------------|
   |  16MHz  |   pins 2 & 3   |   pins 1 & 2   |   pins 2 & 3   |
   |         |     closed     |     closed     |     closed     |
   |---------+----------------+----------------+----------------|
   |  20MHz  |   pins 1 & 2   |   pins 1 & 2   |   pins 2 & 3   |
   |         |     closed     |     closed     |     closed     |
   |---------+----------------+----------------+----------------|
   |  25MHz  |   pins 2 & 3   |   pins 2 & 3   |   pins 1 & 2   |
   |         |     closed     |     closed     |     closed     |
   |---------+----------------+----------------+----------------|
   |  33MHz  |   pins 1 & 2   |   pins 2 & 3   |   pins 1 & 2   |
   |         |     closed     |     closed     |     closed     |
   |---------+----------------+----------------+----------------|
   | 50i MHz |   pins 2 & 3   |   pins 2 & 3   |   pins 1 & 2   |
   |         |     closed     |     closed     |     closed     |
   |---------+----------------+----------------+----------------|
   | 66i MHz |   pins 1 & 2   |   pins 2 & 3   |   pins 1 & 2   |
   |         |     closed     |     closed     |     closed     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                   CPU TYPE CONFIGURATION                   |
   |------------------------------------------------------------|
   |  Speed   |   J1   |      J2      |     J3     |     J4     |
   |----------+--------+--------------+------------+------------|
   | 80486SX  |  Open  |     Open     |    Open    |    Open    |
   |----------+--------+--------------+------------+------------|
   | 80487SX  | Closed |  pins 1 & 2  | pins 1 & 2 | pins 2 & 3 |
   |          |        |    closed    |   closed   |   closed   |
   |----------+--------+--------------+------------+------------|
   | 80486DX  | Closed |  pins 1 & 2  | pins 1 & 2 | pins 1 & 2 |
   |          |        |    closed    |   closed   |   closed   |
   |----------+--------+--------------+------------+------------|
   | ODP486SX | Closed |  pins 1 & 2  | pins 1 & 2 | pins 2 & 3 |
   |          |        |    closed    |   closed   |   closed   |
   |----------+--------+--------------+------------+------------|
   | 80486DX2 | Closed |  pins 1 & 2  | pins 1 & 2 | pins 1 & 2 |
   |          |        |    closed    |   closed   |   closed   |
   +------------------------------------------------------------+