Use 3.1 it's better

It should be the same code. What's the checksum? Marco shows a checksum of 4CF6 for v3.1.

I can check mine tomorrow to see what version boot rom it has, maybe Met is different somehow?

So I just checked my Met Pro and it also says V1.0

I just dumped it here: http://www.filedropper.com/pinballbootv10

The chip label says "Pinball Boot V1.0 128M $CFF0 11-18-16" but this is an 8Mbit eprom and I am consistently getting a checksum of DFF0.

dup

I can post another link tonight when I get home. If I happen to forget shoot me a pm.

Here ya go:

https://gofile.io/d/mREnrB

So I read the info at mattsbasementarcade linked above, I do find it odd that some Met games need the 3.1 boot rom and some need the 1.0 boot rom. I am not sure of this (and maybe someone with the 3.1 bootrom could verify) but I am thinking older runs of Met may have used a CPU board with 64MB flash memory, and newer runs of Met (Pro LED for example) definitely use a CPU board with 128MB flash memory on board. The different amount of flash memory would mean a different boot rom is needed.

Other than the potentially different flash memory sizes, there may be a difference in the USB controller chip on the SAM boards that may be what is requiring the different bootroms.