Hacking Hardware Picofly - a HWFLY switch modchip

[vittorio]

I'm currently trying to mod my V2 Switch using an rp2040 zero and the hwfly v2 cable, but its not working so far. I get a short blue flash followed by a short orange flash. The faq suggests that there is a problem with the dat0 connection to the emmc. I tried the solder/test points on the main switch pcb for clk, dat0 and cmd, as well as the points on the emmc. There shouldn't be any cold solder joints. I tested every connection using the test points on the main switch pcb. I've got the SKhynix emmc so this should also not be the problem. I've tried it with 47 ohm on dat0 and cmd, as well as with 94 ohm, both didn't work.

Some additional information:
- The switch doesn't boot when everything is connected
- The switch does boot to OFW when the rp2040 isn't connected to the 3V3
- I had to apply the rgb bridge on the rp2040

I'm out of ideas. It would be awesome if someone had some suggestions.

try to press the reset button on rp2040 when the del yellow comes out, use 47ohm resistors

 

[MicroRepairRX]

Okay so I tried both sets of solder points on the Mariko Switch V2 with SkHynix emmc. The light for both sets of solders points is blue then a flash of green the the OFW logo showing. Not the PicoFly logo.

Resetting the chip yields the same results. There is no resistor on the RST point anymore.

Is Mariko V2 switch not supported with Hynix emmc?

Really stumped here as I've never had issues installing these chips. Any help is much appreciated. Thanks.

 

[vittorio]

Okay so I tried both sets of solder points on the Mariko Switch V2 with SkHynix emmc. The light for both sets of solders points is blue then a flash of green the the OFW logo showing. Not the PicoFly logo.

Resetting the chip yields the same results. There is no resistor on the RST point anymore.

Is Mariko V2 switch not supported with Hynix emmc?

Really stumped here as I've never had issues installing these chips. Any help is much appreciated. Thanks.

do you use the flat for the cpu?

 

[MicroRepairRX]

do you use the flat for the cpu?

No, I use the dual mosfets and wires.

 

[Danook28]

I see alot of flux residue. I would clean those first (if you have not done so yet). I had a similar problem on Oled, everything was ok, the flux was the issue.
Also check edhe continuity of those enamel wires, it can happen sometimes that they connect to the solder point but they are not conducting anything because the enamel coating did not melt while soldering, (especially on this red type that you are using since it has a higher temperature rating)

Post automatically merged: Apr 21, 2023

Yes, almost perfect. I would say maybe by 0.1mm.
One thing that i should have done was maybe to cut half of the legs on mosfet because i think that solder getting under the leg gave it that extra 0.1 height.

Can i buy this mosfet from aliexpress is there small flat than this ??!

 

[QuiTim]

Okay so I tried both sets of solder points on the Mariko Switch V2 with SkHynix emmc. The light for both sets of solders points is blue then a flash of green the the OFW logo showing. Not the PicoFly logo.

Resetting the chip yields the same results. There is no resistor on the RST point anymore.

Is Mariko V2 switch not supported with Hynix emmc?

Really stumped here as I've never had issues installing these chips. Any help is much appreciated. Thanks.

I can confirm that SkHynix on V2 works, just did one last night.

 

[MicroRepairRX]

I can confirm that SkHynix on V2 works, just did one last night.

Did you use the flex cable or dual mosfets with wires?

 

[vittorio]

send the photo of the welding of the mosfets

 

[MicroRepairRX]

send the photo of the welding of the mosfets

I just took the mosfets off. I'm gonna try the flex and if that works try the mosfets again.

 

[sq_mys]

Does anyone have a decompilation of the firmware? (preferably the latest one)

 

[rehius]

Does anyone have a decompilation of the firmware? (preferably the latest one)

I have

 

[sq_mys]

I have

Can you link it or send it to me? Thanks.

 

[rehius]

Can you link it or send it to me? Thanks.

nah, but if you need some specific information, you might ask

 

[nico77]

is anybody has V1 flex of this ? image?

 

[sq_mys]

nah, but if you need some specific information, you might ask

I was more interested in reading through it out of curiosity. I have nothing specific to ask. Is there any reason you are keeping it closed source?

 

[QuiTim]

Can i buy this mosfet from aliexpress is there small flat than this ??!

The recommended one for this install is IRFHS8342. It's much smaller then the one I used. You can find it here https://a.aliexpress.com/_mPq8gz6

This is the one I used IRF8714. It's bigger and it has legs on the outside so it is much easier to solder. But you have to find the right place to put it. I cut the connecting part of the shield from APU to Ram and placed it there in the middle (covering it with kapton tape below and above).
You can find it here:
https://a.aliexpress.com/_mspEKhE

 

[NooBziN]

I see alot of flux residue. I would clean those first (if you have not done so yet). I had a similar problem on Oled, everything was ok, the flux was the issue.
Also check edhe continuity of those enamel wires, it can happen sometimes that they connect to the solder point but they are not conducting anything because the enamel coating did not melt while soldering, (especially on this red type that you are using since it has a higher temperature rating)

Post automatically merged: Apr 21, 2023

Yes, almost perfect. I would say maybe by 0.1mm.
One thing that i should have done was maybe to cut half of the legs on mosfet because i think that solder getting under the leg gave it that extra 0.1 height.

Do you have a diagram of it?

 

[rehius]

I was more interested in reading through it out of curiosity. I have nothing specific to ask. Is there any reason you are keeping it closed source?

To understand the main idea the available source (spacecraft 2.0) is pretty enough.

Post automatically merged: Apr 21, 2023

Is there any reason you are keeping it closed source?

Multiple reasons.

 

[Dandan0404]

question, i have NSO subs , games like fortnite and warframe then modding it....

will the sysnand be exact replica/copy of OFW? thats where to play legit games right?

 

[sq_mys]

To understand the main idea the available source (spacecraft 2.0) is pretty enough.

Post automatically merged: Apr 21, 2023

Multiple reasons.

I was unaware of this project. Thank you.