(TXT) View Source
       
       # 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                                       
       
 (IMG) IMG 1
          
       
          +------------------------------------------------------------+
          |                        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        |
          +------------------------------------------------------------+