Sempron 64 MMU bug?

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revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 19869
Location: In your JS exploiting you and your system

revolution 19 Aug 2008, 17:01

Folks: There is one happy coder feeling the dizzy intoxication of success.

19 Aug 2008, 17:01

lazer1

Joined: 24 Jan 2006
Posts: 185

lazer1 19 Aug 2008, 19:14

with multiprocessors the keyboard controller will be connected to just
1 CPU. enabling bit 20 is via the keyboard controller.

presumably that means you only enable bit 20 with the BSP?

is A20 shared by all the CPUs?

perhaps with multiprocessors they enable bit 20 by default

one other curious thing is that with the original problem cr3
seems to have been accessing the correct memory without
A20 enabled.

19 Aug 2008, 19:14

f0dder

Joined: 19 Feb 2004
Posts: 3175
Location: Denmark

f0dder 21 Aug 2008, 00:56

Glad my hunch turned out to be correct Smile

21 Aug 2008, 00:56

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