User`s manual

CyberResearch
®
Motherboards MXGD Series
CyberResearch, Inc. 93
25 Business Park Drive P: [phone]; F: [phone]
Branford, CT USA www.cyberresearch.com
Figure 5-10: Serial Port Mode Select Jumper Pinout Locations
5.5.3 COM 3/4 Pin 9 Setting Jumper
Jumper Label: JP5
Jumper Type:
10-pin header
Jumper Settings: See Table 5-4
Jumper Location: See Figure 5-11
The COM 3/4 Pin 9 Setting jumper configures pin 9 on COM 3 and COM 4 as either a +5V,
+12V power source or as a ring-in (RI) line. The COM 3/4 Pin 9 Setting jumper selection
options are shown in Table 5-4.
COM ¾ RI Pin Description
Short 1 – 3 COM 3 RI Pin use +12V
Short 3 – 5 COM 3 RI Pin use +5V
Short 5 – 7 COM 3 RI Pin use +5V
Short 7 – 9 COM 3 RI Pin use RI Default
Short 2 – 4 COM 4 RI Pin use +12V
Short 4 – 6 COM 4 RI Pin use +5V