Specifications

Appendix B PC Bus Controllers 97
Jumpers on the PC Bus Controller
The PC Bus controller communicates with the computer through an
asynchronous serial port on the controller. Every serial device in your
PC must use a unique serial communication (COM) port and a unique
interrupt request (IRQ).
The PC Bus controller uses the following default settings:
Communication Port: COM3
Interrupt Request: IRQ4
By default, most PC configurations use IRQ4 for COM1 or COM3. If
your mouse is already using COM1/IRQ4, you need to change the
default IRQ. To use different settings, change the jumpers before you
install the PC Bus controller into your computer.
Handling the PC Bus Controller
The PC Bus controller is a printed circuit board. Static electricity can
damage the controller. Before handling the controller, discharge static
electricity from your body by touching bare, grounded metal. While
handling the controller, do not walk across carpeting and do not touch
materials (plastic, vinyl, Styrofoam) that create static electricity.
Locating the Jumpers
Take a moment to locate the jumpers that define the communication
settings for the PC Bus controller.
T1 T6T5T4T3T2
A1
A2
A3
A4
A5
A6
12
13
14
15
110
111
112
115
JP1
ADDRESS INTERRUPT
JP2
T1 T6T5T4T3T2
A1
A2
A3
A4
A5
A6
12
13
14
15
110
111
112
115
JP1
AD DRE SS INT ERR UP T
JP2
!
These pins define the
communication (COM) port.
These pins define the
interrupt request (IRQ).