9
Serial Port Connector: JCOM1 (Optional)
The mainboard offers one 9-pin male DIN connector COM 1 (on the
rear panel), and one optional serial port JCOM1. Both are 16550A
high speed communication ports that send/receive 16 bytes FIFOs.
You can attach a serial mouse or other serial device directly to them.
Clear CMOS Jumper: JBAT1
There is a CMOS RAM on board that has a power supply from
external battery to keep the data of system configuration. With
the CMOS RAM, the system can automatically boot OS every
time it is turned on. If you want to clear the system configuration, use the JBAT1 (Clear CMOS
Jumper) to clear data. Follow the instructions in the image to clear the data.
MSI Reminds You...
You can clear CMOS by shorting 2-3 pin while the system is off. Then return to 1-2 pin position.
Avoid clearing the CMOS while the system is on, which will damage the mainboard.
AGP (Accelerated Graphics Port) Slot
The AGP slot allows you to insert the AGP
graphics card. AGP is an interface specification
designed for the throughput demands of 3D graphics. It introduces a 66MHz, 32-bit channel for
the graphics controller to directly access main memory. The slot supports AGP card for 8x/4x at
1.5v (3.3v is not supported).
PCI (Peripheral Component Interconnect) Slots
The PCI slots allow you to insert the expansion cards
to meet your needs. When adding or removing
expansion cards, make sure that you unplug the power supply first. Meanwhile, read the
documentation for the expansion card to make any necessary hardware or software settings for
the expansion card, such as jumpers, switches or BIOS configuration.
PCI Interrupt Request Routing
The IRQ, abbreviation of interrupt request line and pronounced I-R-Q, are hardware lines over
which devices can send interrupt signals to the microprocessor. The PCI IRQ pins are typically
connected to the PCI bus INT A# ~ INT D# pins as follows:
Order1
Order2
Order3
Order4
PCI Slot 1
INT B#
INT C#
INT D#
INT A#
PCI Slot 2
INT C#
INT D#
INT A#
INT B#
PCI Slot 3
INT D#
INT A#
INT B#
INT C#
PCI Slot 4
INT A#
INT B#
INT C#
INT D#
3
3
3
1
1
1
2
2
2
Keep Data
Clear Data
GND
DSR
RTS
CTS
RI[9]
SOUT
[2]SIN
DTR
Summary of Contents for MS-7156
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Page 54: ...48 Spread Spectrum EMI Disabled CPU Clock CPU CPU MHz FSB BIOS BIOS...
Page 66: ...60 Spread Spectrum EMI Disabled CPU Clock CPU CPU MHz FSB BIOS BIOS...
