User`s manual

MMGA Series CyberResearch

Motherboards

The COM Port Pin 9 Setting jumpers configure pin 9 on COM 2/COM 3/COM 4 as either a

+5V, +12V power source (see Section 5.5.3 to setup) or as a ring-in (RI) line. The COM

Port Pin 9 Setting jumpers selection options are shown in Table 1-33.

J_COM_F2 Description

Short 1 – 2 COM 2 RI Pin use voltage

Short 2 – 3 COM 2 RI Pin use RI Default

J_COM_F3 Description

Short 1 – 2 COM 3 RI Pin use voltage

Short 2 – 3 COM 3 RI Pin use RI Default

J_COM_F4 Description

Short 1 – 2 COM 4 RI Pin use voltage

Short 2 – 3 COM 4 RI Pin use RI Default

Table 1-33: COM Port Pin 9 Setting Jumper Settings

The COM Port Pin 9 Setting jumper locations are shown in Figure 1-54 below.

Figure 1-54: COM Port Pin 9 Setting Jumper Locations