DEICO ELECTRONICS, INC.
=======================

   486DSX

   Processor        80486SX/80486DX                               
   Processor Speed  20/25/33MHz                                   
   Chip Set         OPTI                                          
   Max. Onboard     32MB                                          
   DRAM             
   Cache            64/256KB                                      
   BIOS             AMI                                           
   Dimensions       330mm x 218mm                                 
   I/O Options      Parallel port, serial ports (2), floppy drive 
                    interface, IDE interface                      
   NPU Options      4167                                          

<gopher://bitreich.org/I/th99/m/C-D/30531-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | Purpose            | Location  | Purpose        | Location |
   |--------------------+-----------+----------------+----------|
   | Reset switch       |    J1     | Serial port 1  |   J21    |
   |--------------------+-----------+----------------+----------|
   | Turbo LED          | J2 pins 1 | Serial port 2  |   J22    |
   |                    |    & 2    |                |          |
   |--------------------+-----------+----------------+----------|
   | Turbo switch       | J2 pins 3 | Power LED &    |   J23    |
   |                    |    & 4    | keylock        |          |
   |--------------------+-----------+----------------+----------|
   | External battery   |    J10    | Speaker        |   J24    |
   |--------------------+-----------+----------------+----------|
   | Floppy drive       |    J19    | Parallel port  |   J27    |
   | interface          |           |                |          |
   |--------------------+-----------+----------------+----------|
   | IDE interface      |    J20    | IDE interface  |   J28    |
   |                    |           | LED            |          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |               Function               | Jumper |  Position  |
   |--------------------------------------+--------+------------|
   |>> | Monitor type select color        |  JP1   | pins 1 & 2 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |   | Monitor type select monochrome   |  JP1   | pins 2 & 3 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |>> | CMOS battery select internal     |  JP2   | pins 1 & 2 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |   | CMOS battery select external     |  JP2   | pins 2 & 3 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |>> | Factory configured - do not      |  JP3   | pins 1 & 2 |
   |   | alter                            |        |   closed   |
   |---+----------------------------------+--------+------------|
   |>> | System clock speed select OSC/2  |  JP4   | pins 2 & 3 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |   | System clock speed select OSC/1  |  JP4   | pins 1 & 2 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |>> | CMOS memory normal operation     |  JP14  | pins 1 & 2 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |   | CMOS memory clear                |  JP14  | pins 2 & 3 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |>> | IRQ4 select serial port 1 (J21)  |  JP15  | pins 2 & 3 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |   | IRQ4 select serial port 2 (J22)  |  JP15  | pins 1 & 2 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |   | IRQ4 disabled                    |  JP15  | pins 3 & 4 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |   | IRQ3 select serial port 1 (J21)  |  JP16  | pins 2 & 3 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |>> | IRQ3 select serial port 2 (J22)  |  JP16  | pins 1 & 2 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |   | IRQ3 disabled                    |  JP16  | pins 3 & 4 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |   | IRQ9 select serial port 1 (J21)  |  JP17  | pins 2 & 3 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |   | IRQ9 select serial port 2 (J22)  |  JP17  | pins 1 & 2 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |>> | IRQ9 disabled                    |  JP17  | pins 3 & 4 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |   | IRQ5 select serial port 1 (J21)  |  JP18  | pins 2 & 3 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |   | IRQ5 select serial port 2 (J22)  |  JP18  | pins 1 & 2 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |>> | IRQ5 disabled                    |  JP18  | pins 3 & 4 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |>> | Parallel port (J27) select IRQ7  |  JP19  | pins 1 & 2 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |   | Parallel port (J27) select IRQ5  |  JP19  | pins 2 & 3 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |   | Parallel port (J27) select no    |  JP19  | pins 3 & 4 |
   |   | interrupt                        |        |   closed   |
   |---+----------------------------------+--------+------------|
   |>> | IDE on-board interface enabled   |  JP25  | pins 1 & 2 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |   | IDE on-board interface disabled  |  JP25  | pins 2 & 3 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |>> | Floppy on-board interface        |  JP26  | pins 1 & 2 |
   |   | enabled                          |        |   closed   |
   |---+----------------------------------+--------+------------|
   |   | Floppy on-board interface        |  JP26  | pins 2 & 3 |
   |   | disabled                         |        |   closed   |
   |---+----------------------------------+--------+------------|
   |>> | Serial port 1 (J21) select COM1  |  JP27  | pins 1 & 2 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |   | Serial port 1 (J21) select COM3  |  JP27  | pins 2 & 3 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |   | Serial port 1 (J21) disabled     |  JP27  | pins 3 & 4 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |>> | Serial port 2 (J22) select COM2  |  JP28  | pins 1 & 2 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |   | Serial port 2 (J22) select COM4  |  JP28  | pins 2 & 3 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |   | Serial port 2 (J22) disabled     |  JP28  | pins 3 & 4 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |>> | Parallel port (J27) select LPT1  |  JP29  | pins 1 & 2 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |   | Parallel port (J27) select LPT2  |  JP29  | pins 2 & 3 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |   | Parallel port (J27) disabled     |  JP29  | pins 3 & 4 |
   |   |                                  |        |   closed   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     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) 256K x 9    |     (4) 1M x 9     |
   |------------------+--------------------+--------------------|
   |       8MB        |     (4) 1M x 9     |     (4) 1M x 9     |
   |------------------+--------------------+--------------------|
   |       16MB       |     (4) 4M x 9     |        NONE        |
   |------------------+--------------------+--------------------|
   |       20MB       |     (4) 1M x 9     |     (4) 4M x 9     |
   |------------------+--------------------+--------------------|
   |       32MB       |     (4) 4M x 9     |     (4) 4M x 9     |
   +------------------------------------------------------------+

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

   +------------------------------------------------------------+
   |                 CACHE JUMPER CONFIGURATION                 |
   |------------------------------------------------------------|
   |       Size       |        JP9         |        JP10        |
   |------------------+--------------------+--------------------|
   |       64KB       | pins 2 & 3 closed  | pins 2 & 3 closed  |
   |------------------+--------------------+--------------------|
   |      256KB       | pins 1 & 2 closed  | pins 1 & 2 closed  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                   CPU TYPE CONFIGURATION                   |
   |------------------------------------------------------------|
   |  Type   |      JP5       |      JP6       |      JP7       |
   |---------+----------------+----------------+----------------|
   | 80486SX |   pins 3 & 4   |   pins 3 & 4   |   pins 3 & 4   |
   |         |     closed     |     closed     |     closed     |
   |---------+----------------+----------------+----------------|
   | 80487SX |   pins 2 & 3   |   pins 2 & 3   |   pins 2 & 3   |
   |         |     closed     |     closed     |     closed     |
   |---------+----------------+----------------+----------------|
   | 80486DX |   pins 1 & 2   |   pins 1 & 2   |   pins 1 & 2   |
   |         |     closed     |     closed     |     closed     |
   +------------------------------------------------------------+