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3F0
X X X X X
3F8
X X X X X X
By default, the GPS6185HR comes configured with a base address of 0x3E8 for the first UART
which connects to GPS COM1 and 0x2E8 for the second UARD that connects to GPS COM2.
When selecting a base address for the GPS6185HR, please observe the following guidelines:
•
Every device in your PC/104 system must have a unique base address! When selecting
a base address for the GPS6185HR, make certain that it does not conflict with any other
devices.
•
Base addresses 0x3F8 and 0x2F8 are typically used by serial ports COM1 and COM2,
respectively. If you wish to use one of those base addresses, you will need to disable
any conflicting serial port.
•
Some operating systems expect UART devices to be located at the standard serial port
base addresses (0x3F8, 0x2F8, 0x3E8, and 0x2E8). Setting your GPS6185HR to one of
these addresses can make system setup and configuration easier.
IRQ Jumpers
(Default: GPS IRQ 5 closed, G Jumper closed)
(Default: COM IRQ 10 closed, G Jumper closed)
The IRQ selection jumpers allow you to set the IRQ used by the serial port UART of the
GPS6185HR. The GPS6185HR can be configured for any one of the following IRQs: 2, 3, 4, 5,
6, 7, 10, 11, 12, 14, or 15. The IRQ can be set by closing the appropriately labeled jumper on the
board.
The IRQ jumpers are located next to base address jumpers, as shown in the diagram at the
beginning of this chapter.
Note:
Typically IRQs can not be shared; although there are some special cases (see “The G
Jumper” later in this document). In general, the IRQ you select should not be used by
any other devices in your system.
Reserved IRQs
Some of the IRQ choices on the GPS6185HR may already be used by your CPU’s onboard
peripherals. Some commonly-used IRQs are:
•
IRQ 2/9 is used by some VGA controllers.
•
IRQ 3 or 4 may be set to a serial port in your system. You may need to disable a serial
port in your system prevent an IRQ conflict.
