39 PPC-157T User ManualChapter 5 Jumpers and ConnectorsTable 5.27: CN37 (Mini DIN PS2 Connector)Pin Signal1 KB_DATA2 MS_DATA3 GND4 +V55 KB_CLK6 MS_CLKTable 5.28: CN41 (Clear CMOS Connector (Reserved))Pin Signal1 NC2 RTC_RST#3 GNDTable 5.29: CN42 (COM3 RI Function Selection Connector)Pin Signal1 COM3_RI2 COM3_RI_Selection3 +V54 COM3_RI_Selection5 +V12Table 5.30: CN43 (COM4 RI Function Selection Connector)Pin Signal1 COM4_RI2 COM4_RI_Selection3 +V54 COM4_RI_Selection5 +V12Table 5.31: CN44 (COM2 RI Function Selection Connector)Pin Signal1 COM2_RI2 COM2_RI_Selection3 +V54 COM2_RI_Selection5 +V12