D-Bracket

D-bracket is an MSI bracket that fits in an empty PCI slot opening, that includes 2 USB Ports, and Four LEDs. It is actually connected directly to the MSI motherboard, not to a PCI slot. The 4 LEDs flash different codes as the system goes through different stages of the POST routine, allowing the user to easily find any problems with the hardware setup. The Leds simply count the stages in binary, where the red color is 0 and the green is 1.

Decoding the pattern

1 ALL RED System Power ON -The D-LED will hang here if the processor is damaged or not installed properly.

2 ALL RED EXCEPT TOP LEFT Early Chipset Initialization

3 ALL RED EXCEPT TOP RIGHT Memory Detection Test - Testing onboard memory size. The D-LED will hang if the memory module is damaged or not installed properly

4 BOTH BOTTOM RED Decompressing BIOS image to RAM for fast booting

5 ALL RED EXCEPT BOTTOM LEFT Initializing Keyboard Controller

6 TWO RIGHT RED Testing VGA BIOS - This will start writing VGA sign-on message to the screen

7 TOP LEFT & BOTTOM RIGHT RED Processor Initialization - This will show information regarding the processor (like brand name, system bus, etc...)

8 BOTTOM RIGHT RED Testing RTC (Real Time Clock)

9 ALL RED EXCEPT BOTTOM RIGHT Initializing Video Interface - This will start detecting CPU clock, checking type of video onboard. Then, detect and initialize the video adapter

10 TOP RIGHT & BOTTOM LEFT RED BIOS Sign On - This will start showing information AbOUT logo, processor brand name, etc...

11 TWO LEFT RED Testing Base and Extended Memory - Testing base memory from 240K to 640K and extended memory above 1MB using various patterns

12 BOTTOM LEFT RED Assign Resources to all ISA

13 BOTH TOP RED Initializing Hard Drive Controller - This will initialize IDE drive and controller

14 TOP RIGHT RED Initializing Floppy Drive Controller - This will initializing Floppy Drive and controller

15 TOP LEFT RED Boot Attempt - This will set low stack and boot via INT 19h

16 ALL GREEN Operating System Booting