MSI PRO A620M-E Manuel D'utilisation page 36

JOC_FS1: Safe Boot Jumper
This jumper is used for Safe Boot. Once enabled, the system will boot with default
settings and lower PCIe (from CPU) mode.
JCOM1: Serial Port Connector
This connector allows you to connect the optional serial port with bracket.
Normal
(default)
Boot with the saved
BIOS settings.
2
1
Pin Signal Name
1 DCD
3 SOUT
5 Ground
7 RTS
9 RI
34
Enabled
Apply the BIOS default
settings and lower PCIe
(from CPU) mode for
Safe Boot
10
9
Pin Signal Name
2 SIN
4 DTR
6 DSR
8 CTS
10 No Pin