9
Serial PortConnector:JCOM1(Optional)
The mainboardoffersone9-pinmaleDINconnectorCOM1(ontherear
panel), andoneoptional serial port JCOM1.Bothare16550Ahigh speed
communication portsthat send/receive16bytesFIFOs. Youcanattacha
serial mouseorotherserial devicedirectlytothem.
PIN SIGNAL DESCRIPTION PIN SIGNAL DESCRIPTION
1
3
5
7
9
DCD
SOUT
GND
RTS
RI
DataCarryDetect
ReceiveDataTransmit
Data
Request ToSend Ring
Indicate
2
4
6
8
10
SIN
DTR
DSR
CTS
X
Serialinorreceivedata
Serialout ortransmit data
DataSetReady
ClearToSend
X
Clear CMOSJumper:JBAT1
ThereisaCMOSRAMon boardthathasapowersupplyfrom
external batterytokeepthedataofsystemconfiguration.Withthe
CMOSRAM, thesystemcan automaticallyboot OSeverytimeitis
turnedon.If you want toclearthesystemconfiguration,usethe
JBAT1(ClearCMOSJumper)tocleardata. Followtheinstructions
in theimagetoclearthedata.
MSI RemindsYou...
YoucanclearCMOSbyshorting2-3pin while thesystemisoff. Thenreturnto1-2pin position.
Avoid clearingtheCMOSwhilethesystemison, whichwill damagethe mainboard.
AGP(Accelerated Graphics Port) Slot
The AGPslotallowsyoutoinserttheAGP
graphics card.AGPisan interfacespecification
designedforthethroughput demandsof 3Dgraphics. It introducesa66MHz,32-bitchannelfor
thegraphics controllertodirectlyaccess mainmemory.Theslot supportsAGPcardfor8x/4xat
1.5v(3.3visnotsupported).
PCI (PeripheralComponentInterconnect) Slots
The PCIslotsallowyoutoinsert theexpansion cards
tomeetyourneeds.When adding orremoving
expansioncards,makesurethatyou unplugthe
powersupplyfirst. Meanwhile,readthedocumentationfortheexpansioncardtomakeany
necessaryhardwareorsoftwaresettingsfortheexpansioncard, suchasjumpers, switchesor
BIOSconfiguration.
PCI InterruptRequestRouting
The IRQ,abbreviation of interrupt requestlineandpronouncedI-R-Q,arehardwarelinesover
whichdevicescansendinterrupt signalstothemicroprocessor.ThePCI IRQpinsaretypically
connected tothePCIbusINTA#~INT D#pinsasfollows:
Order1 Order2 Order3 Order4
PCISlot 1 INTB# INTC# INTD# INTA#
PCISlot 2 INTC# INTD# INTA# INTB#
PCISlot 3 INTD# INTA# INTB# INTC#
PCISlot 4 INTA# INTB# INTC# INTD#