Swapping T113-S3 to T113-S4?

[ChaoticWeaponry]

Hey everyone, apologies if I’m in the wrong area. I had an idea to hopefully fix the issues regarding low memory.

The AD5M uses an Allwinner T113-S3 SOC with 128MB RAM, Allwinner does have an almost identical package T113-S4 with 256MB RAM.

Would there be any chance this could work? Or are there firmware ‘locks’ preventing the use of more than 128MB? I’ve already ordered the new SOC, so I’d love to be a guinea pig for trying things.

[saturnknts]

Over in the Russian telegram 5m community someone has swapped it. I believe it's functional but haven't delved into details. It above my skill level lol

[ChaoticWeaponry]

I attempted soldering the new one, I now get to buy another motherboard lol

I’m gonna try out running a Raspberry Pi and controlling the MCU over UART/Serial.

[AR1972]

Did you successfully get the mcu on the board and flash the mcu?

[ChaoticWeaponry]

The replacement CPU install did not go well.. lol
I had a burr on my soldering iron and it snagged a few pins while drag soldering.

As for the MCU, I’m still trying to figure out how to flash it, STM Link doesn’t see the Nations MCU, and the klipper method doesn’t work either… So I’ll have to try another method to flash.

[MrNRod]

I was planning on doing this as well. My soldering skills are decent I replaced the SMD Drivers on my old printer from A4988 to TMC2208. This shouldn't be much harder.

[Tasshack]

Have you done it?

[loss-and-quick]

I did it successfully, so only one thing needs to be done after the swap: flash the new DTB

[Tasshack]

My S4 is on the way, I will replace it when it arrives.
Why the new DTB is needed, isn't that the S4 is compatible with S3 pin to pin?
Can you share the new one?

[loss-and-quick]

https://t.me/FF_5M_5M_Pro/12695/602830