VTECH INDUSTRIES, INC.
======================

   LASER 386SX/2, 386SX/3

   Device Type      Mainboard                                     
   Processor        80386SX                                       
   Processor Speed  16/20/25MHz                                   
   Chip Set         Unidentified                                  
   Video Chip Set   None                                          
   Maximum Onboard  4MB                                           
   Memory           
   Maximum Video    None                                          
   Memory           
   Cache            None                                          
   BIOS             Unidentified                                  
   Dimensions       305mm x 244mm                                 
   I/O Options      Floppy drive interface, game port, IDE        
                    interface, serial ports (2), parallel port    
   NPU Options      80387SX                                       

<gopher://bitreich.org/I/th99/m/U-Z/34763-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | Purpose        | Location | Purpose             | Location |
   |----------------+----------+---------------------+----------|
   | Parallel port  |   CN1    | IDE interface       |   J10    |
   |----------------+----------+---------------------+----------|
   | Game port      |   CN2    | Floppy drive        |   J12    |
   |                |          | interface           |          |
   |----------------+----------+---------------------+----------|
   | Serial port    |   CN3    | Speaker             |   J15    |
   |----------------+----------+---------------------+----------|
   | Serial port    |   CN4    | IDE interface LED   |   JP32   |
   |----------------+----------+---------------------+----------|
   | Front panel    |    J4    | Riser slot          |   SL1    |
   | connector      |          |                     |          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |              Function               | Label |   Position   |
   |-------------------------------------+-------+--------------|
   |>> | Factory configured - do not     |  J1   | Unidentified |
   |   | alter                           |       |              |
   |---+---------------------------------+-------+--------------|
   |>> | Factory configured - do not     |  J2   | Unidentified |
   |   | alter                           |       |              |
   |---+---------------------------------+-------+--------------|
   |>> | Factory configured - do not     | JP17  | Unidentified |
   |   | alter                           |       |              |
   |---+---------------------------------+-------+--------------|
   |   | Floppy drive interface enabled  | JP28  |     Open     |
   |---+---------------------------------+-------+--------------|
   |   | Floppy drive interface disabled | JP28  |    Closed    |
   |---+---------------------------------+-------+--------------|
   |   | IDE interface enabled           | JP29  |    Closed    |
   |---+---------------------------------+-------+--------------|
   |   | IDE interface disabled          | JP29  |     Open     |
   |---+---------------------------------+-------+--------------|
   |   | Parity enabled                  | JP33  |    Closed    |
   |---+---------------------------------+-------+--------------|
   |   | Parity disabled                 | JP33  |     Open     |
   |---+---------------------------------+-------+--------------|
   |   | NPU not installed               | JP40  |  Pins 1 & 2  |
   |   |                                 |       |    closed    |
   |---+---------------------------------+-------+--------------|
   |   | NPU installed                   | JP40  |  Pins 2 & 3  |
   |   |                                 |       |    closed    |
   |---+---------------------------------+-------+--------------|
   |   | Interleave mode enabled         | JP42  |  Pins 1 & 2  |
   |   |                                 |       |    closed    |
   |---+---------------------------------+-------+--------------|
   |   | Interleave mode disabled        | JP42  |  Pins 2 & 3  |
   |   |                                 |       |    closed    |
   |------------------------------------------------------------|
   | Note: The location of JP28 is unidentified.                |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    MEMORY CONFIGURATION                    |
   |------------------------------------------------------------|
   |    Size    |  Bank 0  |  Bank 1  |   Bank 2    |  Bank 3   |
   |------------+----------+----------+-------------+-----------|
   |    1MB     |  44256   |  44256   |    None     |   None    |
   |------------+----------+----------+-------------+-----------|
   |   1.5MB    |  44256   |  44256   | (2) 256K x  |   None    |
   |            |          |          |      9      |           |
   |------------+----------+----------+-------------+-----------|
   |  2MB (A)   |  44256   |  44256   | (2) 256K x  | (2) 256K  |
   |            |          |          |      9      |    x 9    |
   |------------+----------+----------+-------------+-----------|
   |  2MB (B)   |   None   |   None   | (2) 1M x 9  |   None    |
   |------------+----------+----------+-------------+-----------|
   |    4MB     |   None   |   None   | (2) 1M x 9  | (2) 1M x  |
   |            |          |          |             |     9     |
   |------------------------------------------------------------|
   | Note: The number of 44256 chips is unidentified. Parity    |
   | chips are 4464. The location and amount of chips used is   |
   | unidentified.                                              |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                MEMORY SWITCH CONFIGURATION                 |
   |------------------------------------------------------------|
   |   Size   |  SW1/1   |  SW1/2  |  SW1/3  |  SW1/4  | SW1/5  |
   |----------+----------+---------+---------+---------+--------|
   |   1MB    |    On    |   On    |   On    |   Off   |   On   |
   |----------+----------+---------+---------+---------+--------|
   |  1.5MB   |    On    |   On    |   On    |   Off   |   On   |
   |----------+----------+---------+---------+---------+--------|
   | 2MB (A)  |    On    |   On    |   On    |   Off   |   On   |
   |----------+----------+---------+---------+---------+--------|
   | 2MB (B)  |    On    |   Off   |   Off   |   Off   |   On   |
   |----------+----------+---------+---------+---------+--------|
   |   4MB    |    On    |   Off   |   Off   |   Off   |   On   |
   |------------------------------------------------------------|
   | Note: The location of the switch is unidentified.          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |            MEMORY SWITCH CONFIGURATION (CON'T)             |
   |------------------------------------------------------------|
   |   Size   |  SW1/6  |  SW1/7  |  SW1/8  |  SW1/9  | SW1/10  |
   |----------+---------+---------+---------+---------+---------|
   |   1MB    |   On    |   Off   |   On    |   On    |   Off   |
   |----------+---------+---------+---------+---------+---------|
   |  1.5MB   |   On    |   Off   |   On    |   Off   |   On    |
   |----------+---------+---------+---------+---------+---------|
   | 2MB (A)  |   On    |   Off   |   On    |   Off   |   Off   |
   |----------+---------+---------+---------+---------+---------|
   | 2MB (B)  |   On    |   Off   |   On    |   On    |   On    |
   |----------+---------+---------+---------+---------+---------|
   |   4MB    |   On    |   Off   |   On    |   On    |   Off   |
   |------------------------------------------------------------|
   | Note: The location of the switch is unidentified.          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |              SERIAL PORT INTERRUPT SELECTION               |
   |------------------------------------------------------------|
   |            IRQ             | JP18  | JP19  | JP20  | JP22  |
   |----------------------------+-------+-------+-------+-------|
   | 25-pin port as COM1, IRQ4. | 1 & 2 | 2 & 3 | 2 & 3 | 1 & 2 |
   |   9-pin port COM2, IRQ3    |       |       |       |       |
   |----------------------------+-------+-------+-------+-------|
   | 25-pin port as COM2, IRQ3. | 2 & 3 | 1 & 2 | 1 & 2 | 2 & 3 |
   |   9-pin port COM1, IRQ4    |       |       |       |       |
   |------------------------------------------------------------|
   |      Note: Pins designated should be in the closed         |
   |      position. JP25 & JP26 are used to set 3E8 and 2E8.    |
   |      The configuration is unidentified.                    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |             PARALLEL PORT INTERRUPT SELECTION              |
   |------------------------------------------------------------|
   |       IRQ        |        JP16        |        JP21        |
   |------------------+--------------------+--------------------|
   |       IRQ7       | Pins 2 & 3 closed  | Pins 1 & 2 closed  |
   |------------------+--------------------+--------------------|
   |       IRQ5       | Pins 1 & 2 closed  | Pins 2 & 3 closed  |
   |------------------+--------------------+--------------------|
   |     Disabled     |        Open        |        Open        |
   +------------------------------------------------------------+