Serial Ports; Serial Port Connectors - VersaLogic BayCat VL-EPM-31ECP Hardware Reference Manual

The EPM-31 features two 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

Figure 20 shows the location and pin orientation of the serial port connector.
EPM-31 Hardware Reference Manual
Figure 20. Location and Pin Orientation of Serial Port Connector

Serial Ports

6
43