EBX-38 Hardware Reference Manual
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Serial Ports
The EBX-38 features four on-board 16550-based serial communications channels located at
standard PC I/O addresses. The serial ports can be operated in RS-232 4-wire, RS-422, or
RS-485 modes. IRQ lines are chosen in the BIOS Setup utility. Each COM port can be
independently enabled, disabled, or assigned a different I/O base address in the BIOS setup
utility.
Serial Port Connectors
The figure below shows the location and pin orientation of the two serial port connectors.
Figure 17. Location and Pin Orientation of Serial Port Connectors
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