Boot Block Recovery For Free

Essay specific features

 

Issue:

Technology

 

Written by:

Wilfred O

 

Date added:

April 23, 2015

 

Level:

University

 

Grade:

B

 

No of pages / words:

5 / 1172

 

Was viewed:

3202 times

 

Rating of current essay:

 
Essay content:

But these are usually the highest-numbered address pins (A10 and above). These are the pins used by the system to read the System BIOS (original.bin for award v6), calculate the ROM checksum and see if it's valid before decompressing it into memory, and subsequently allow Bootblock POST to pass control over to the System BIOS...
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This you do by giving your system a hard time reading the System BIOS by shorting the 2 high address pins. And when it could not read the System BIOS properly, ROM Checksum Error is detected "so to speak" and Bootblock recovery is activated. Sometimes, any combination of the high address pins won't work to force a checksum error in some chips, like my Winbond W49F002U...
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