B & B ELECTRONICS
=================

   ATRWDT, ATXWDT

   Card Type               Watchdog timer card                    
   Chip Set                None                                   
   Maximum Onboard Memory  Unidentified                           
   I/O Options             Serial port                            
   Hard Drives supported   None                                   
   Floppy drives supported None                                   
   Data Bus                16-bit ISA                             
   Card Size               Full-length                            

<gopher://bitreich.org/I/th99/i/A-B/54104-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |        Function         | Label |     Function     | Label |
   |-------------------------+-------+------------------+-------|
   | 9-pin serial port       |  J2   | Reset button     |  J4   |
   |                         |       | connector        |       |
   |-------------------------+-------+------------------+-------|
   | Motherboard reset       |  J3   | ATX power supply |  ATX  |
   | connector               |       | connector        |       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |          Function          |    Label     |    Position    |
   |----------------------------+--------------+----------------|
   | Normal relay enabled       |   JP1/A-B    |   Pins 1 & 2   |
   |                            |              |     closed     |
   |----------------------------+--------------+----------------|
   | Timer relay enabled        |   JP1/A-B    |   Pins 2 & 3   |
   |                            |              |     closed     |
   |------------------------------------------------------------|
   | Note: If normal relay is enabled, the relay will discharge |
   | normally and will energize after the timeout is reached.   |
   | If timer relay is enabled, the relay will be energized     |
   | while the timer is running and discharge after the timeout |
   | is reached, disabled, or the power is turned off.          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 BASE I/O ADDRESS SELECTION                 |
   |------------------------------------------------------------|
   | Setting | SW1/1 | SW1/2 |SW1/3 |SW1/4 |SW1/5 |SW1/6 |SW1/7 |
   |---------+-------+-------+------+------+------+------+------|
   |  000h   |  On   |  On   |  On  |  On  |  On  |  On  |  On  |
   |---------+-------+-------+------+------+------+------+------|
   |  008h   |  Off  |  On   |  On  |  On  |  On  |  On  |  On  |
   |---------+-------+-------+------+------+------+------+------|
   |  010h   |  On   |  Off  |  On  |  On  |  On  |  On  |  On  |
   |---------+-------+-------+------+------+------+------+------|
   |  018h   |  Off  |  Off  |  On  |  On  |  On  |  On  |  On  |
   |---------+-------+-------+------+------+------+------+------|
   |  020h   |  On   |  On   | Off  |  On  |  On  |  On  |  On  |
   |---------+-------+-------+------+------+------+------+------|
   |  3D8h   |  Off  |  Off  |  On  | Off  | Off  | Off  | Off  |
   |---------+-------+-------+------+------+------+------+------|
   |  3E0h   |  On   |  On   | Off  | Off  | Off  | Off  | Off  |
   |---------+-------+-------+------+------+------+------+------|
   |  3E8h   |  Off  |  On   | Off  | Off  | Off  | Off  | Off  |
   |---------+-------+-------+------+------+------+------+------|
   |  3F0h   |  On   |  Off  | Off  | Off  | Off  | Off  | Off  |
   |---------+-------+-------+------+------+------+------+------|
   |  3F8h   |  Off  |  Off  | Off  | Off  | Off  | Off  | Off  |
   |------------------------------------------------------------|
   |                           Note:                            |
   |                                                            |
   |A total of 128 base address settings are available. The     |
   |switches are a binary representation of the decimal memory  |
   |addresses. SW1/7 is the Most Significant Bit and switch     |
   |SW1/1 is the Least Significant Bit. The switches have the   |
   |following decimal values: SW1/7=512, SW1/6=256, SW1/5=128,  |
   |SW1/4=64, SW1/3=32, SW1/2=16, SW1/1=8. Turn off the switches|
   |and add the values of the switches to obtain the correct    |
   |memory address. (Off=1, On=0)                               |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |               MISCELLANEOUS TECHNICAL NOTES                |
   |------------------------------------------------------------|
   | To enable the ATR version of the watchdog timer card to    |
   | reboot the main board, they must be connected. The mother  |
   | board reset connector on the watchdog timer card can be    |
   | connected to the reset pins on the main board or the reset |
   | button connector of the watchdog timer card can be         |
   | connected to the jumper wires of the main board's reset    |
   | switch.                                                    |
   +------------------------------------------------------------+