User`s manual

MXGD Series CyberResearch

Motherboards

Step 1: Figure 5-9: Clear CMOS Jumper

5.5.2 RS-232/RS-422/485 Serial Port Select Jumper

Jumper Label: JP3

Jumper Type:

3-pin header

Jumper Settings: See Table 5-3

Jumper Location: See Figure 5-10

The RS-232/RS-422/485 Serial Port Select jumper configures the serial port connector as

an RS-232 or RS-422/485 serial port. The RS-232/RS-422/485 Serial Port Select jumper

selection options are shown in Table 5-3.

AT Power Select Description

Short 1 – 2 RS-232 Default

Short 2 – 3 RS-422/485

Table 5-3: Serial Port Mode Select Jumper Settings

The RS-232/RS-422/485 Serial Port Select jumper location is shown in Figure 5-10

below.