MSI 975X Platinum Series User Manual page 18

M S-7246 M ainboard
19 D-Bracket™ 2 Connector
The connector is for you to connect D-Bracket™ 2. D-Bracket™ 2 is a external USB Bracket that support both USB1.1 &
2.0 spec. It integrates four LEDs and allows users to identify system problem through 16 various combinations of LED
signals. The 4 LEDs can debug all problems that fail the system, such as VGA, RAM or other failures. This special feature
is very useful for the overclocking users. These users can use the feature to detect if there are any problems or failures.
1 2
DBG1 DBR1
DBG1 DBR2
DBG3 DBR3
DBR4
DBG4
Key NC
9 10
Red
LEDs signal
System Power ON
1 2
The D-LED will hang here if the
processor is damaged or not in-
3 4
stalled properly.
1 2
Early Chipset Initialization
3 4
Memory Detection T est
Testing onboard memory size. The
1 2
D-LED will hang if the memory mod-
3 4
ule is damaged or not installed
properly.
Decompressing BIOS image to RAM
1 2
for fast booting.
3 4
1 2
Initializing Keyboard Controller.
3 4
Testing VGA BIOS
1 2
This will start writing VGA sign-on
3 4
message to the screen.
Processor Initialization
1 2
This will show information regarding
3 4 the processor (like brand name, sys-
tem bus, etc...)
1 2
Testing RTC (Real Time Clock)
3 4
En-10
Connected to D-Bracket™
2 Connector
Connected to the USB pinheader
in YELLOW color
Green
Description LEDs signal Description
Initializing Video Interface
1 2
This will start detecting CPU clock,
checking type of video onboard. Then,
3 4
detect and initialize the video adapter.
BIOS Sign On
1 2 This will start showing information
about logo, processor brand name,
3 4
etc...
Testing Base and Extended Memory
1 2
Testing base memory from 240K to
640K and extended memory above
3 4
1MB using various patterns.
1 2
Assign Resources to all ISA.
3 4
Initializing Hard Drive Controller
1 2
This will initialize IDE drive and
3 4
controller.
Initializing Floppy Drive Controller
1 2
This will initialize Floppy Drive and
3 4
controller.
Boot Attempt
1 2
This will set low stack and boot via
3 4
INT 19h.
1 2
Operating System Booting
3 4
D-Bracket™ 2
(Optional)
1 2
LEDs
3 4