TiN and I have been working on an open source project for flashing DDR3/DDR4 SPDs using a RaspberryPi. You can follow the project on xDevs.com as well as grab the code.
TiN designed an awesome PCB for DDR3/DDR4 slots that connects up to the RaspberyPi and lets you flash your modules.
This is the top of the board that TiN designed.
And the back side of the board
It has three switches for changing the address as well as LEDs to indicate which address is being used.
He also included a header to connect the RaspberryPi as well as a power switch.
He also added support for a MCU so eventually we can plug this via USB into a regular PC to flash.
Here it is in action flashing DDR3
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