MSI MS-5148 - Peripheral Connectors; Serial and Parallel Ports

CHAPTER 2 HARDWARE INSTALLATION
2.7 Serial Port Connectors: COMA & COMB
The system board has two serial ports COMA and COMB. These two ports
are 16550A high speed communication ports that send/receive 16 bytes
FIFOs. You can attach a mouse or a modem cable directly into these connec-
tors.
2-20
SIMM1
SIMM2
SIMM3
SIMM4
DIMM1
DIMM2
Socket 7
FDD
IDE1
IDE2
ISA SLOT 4
ISA SLOT 2
ISA SLOT 3
ISA SLOT 1
PCI SLOT 4
PCI SLOT 3
PCI SLOT 2
PCI SLOT 1
BIOS
BATT
+
2032
JPF
JGS
JGL
JP2
INTEL
FW82371AB
INTEL
FW82439TX
JBAT
JRMS2
JFAN
ATX
POWER CONNECTOR
KBC
IR
JV1
LPT
COMA & COMB
USB
PS/2
JV3
JV4
JV5
SW
ON
DIP
1
2
1
3
4
1
5
6
JV6
JRMS1
+
1 2 3 4 5
6 7 8 9
COMB
COMA
PIN DEFINITION
Pin # Definition
1 DCD(Data Carry Detect)
2 SIN(Serial In or Receive Data)
3 SOUT(Serial Out or Transmit Data)
4 DTR(Data Terminal Ready)
5 GND
6 DSR(Data Set Ready)
7 RTS(Request To Send)
8 CTS(Clear To Send)
9 RI(Ring Indicate)