D0 - What is it?

[r_edgar99]

Anybody know what signal is carried by the d0 point?

Just curious.

 

[Littlemiss]

I beleive that it carries voltage to the normal XBox bios chip that in turn allows it to boot

When this is grounded out by the Mod Chip this allows the Motherboard to boot using the LPC bus

I might be wrong

 

[matt77303]

basicly if the d0 is grounded then will be tell the xbox to search for a bios on the lpc, where the modchip is. if the d0 is not grounded it will igore the lpc and boot the original xbox bios.

Matt

 

[kim123]

hmm...maybe I just slow, but why did microsoft make this possible in the first place? I mean if the d0 is grounded the xbox should quit, not look for a bios somewhere else...or?

 

[Fantmx]

The Dev kits have the LPC bus activated so developers can try things, and use debug mode. It was also used for creating/testing the bios, and it would be too expensive for them to retool the board to eliminate it.

 

[kim123]

So there is most likely no any LPC bus on xbox 360 and a D0 point you can use to redirect to a different bios?

 

[Fantmx]

There will probably be one, but they will try to make it harder to mod.