Hacking Hardware Oldies Project RP2040-based Original Xbox Modchip

[SylverReZ]

It's official! Much like the Picofly for the Switch, there is now a modchip for the original Xbox that uses the Raspberry Pi Pico. Only 4 resistors and 7 wires are required to solder the Pico to the LPC port. User "Shalx" designed it and has demonstrated on how it works in a video.

Images courtesy of "Shalx":

Download: https://github.com/shalxmva/modxo

 

[wolffangalchemist]

This is great, would be cool if they got it working with a sd card to store bios files and you could just swap between them over wifi with a pico w or a toggle switch with regular pico.

 

[SylverReZ]

Here is a diagram by Mundo Yakara which applies to 1.6, but it also works with revisions below 1.6, too. If you have a console below 1.6, don't do the LPC rebuild or the extra step of lifting the 15th pin on the Xyclops IC.

 

[SylverReZ]

Here's an adapter designed for the Modxo modchip that fits an RP2040-Zero, instructions are on the repo.

https://github.com/m4x10187/Modxo_RP2040_Zero_Adapter

 

[XpertXP1]

Do I need to do the step of dragging and dropping my bios file into the website? or can I just flash modxo_v0.2_BETA.uf2 to my pico and wire it up?
Thanks for this BTW

 

[master801]

Do I need to do the step of dragging and dropping my bios file into the website? or can I just flash modxo_v0.2_BETA.uf2 to my pico and wire it up?
Thanks for this BTW

The BIOS file needs to be converted to uf2 and flashed after flashing modxo first.

It's a required step, not optional.

 

[XpertXP1]

The BIOS file needs to be converted to uf2 and flashed after flashing modxo first.

It's a required step, not optional.

Yes, I understand that, but the zip file includes modxo_v0.2_BETA.uf2 . Is this all that I need to flash? or is there something else I should be flashing?
Thanks

EDIT - I see where I was getting hung up. You have to flash the Pico twice. I have never had to do that before for other projects I have used these on. Ok.. I see now.

Post automatically merged: Jul 29, 2024

i dont see a mention of D0 anywhere, is that required?

Last edit, i promise. It works, found the d0 in this image - https://github.com/shalxmva/modxo/blob/main/images/wiring_diagram.png

Thanks again.....