Hm, if only we could find the Servo V3 or v4 cable, it supports loading a bootloader into RAM so we potentially replace the bootloader from a Unlocked Pixel 3I don't know if it was at this point or not. Because I don't recall seeing it there before while having it in edl. But that's another mode I've been trying to work with some tools in.
The proto device is what this emulated whatever it is, is named. And I'm pretty sure it will be the same across all the pixels and it is the same on my pixel 3 as well as my pixel 4. If you run various commands in Ubuntu you can get a readout of the identifiers for the various devices and consoles and emulators that are operating. The only thing I've been able to surmise Proto2 means is Google's way of calling it a "prototype device" so obviously we would not really be speaking of that in the physical sense. Whatever Proto is it is tied directly into the Titan Citadel. That much I am certain of but to what capacity I have no clue. Since I wasn't expecting to see it, in this state much less on a Windows machine, I can't recall what got it there and I haven't seen it again yet, but I'm also working tonight so I didn't have much time on my hands today.
I've only gotten pretty much one good command to come out of this and actually return something that may or may not be useful and that is a command in edl mode to OEM unlock. Spits out a pretty long set of hex numbers and whatnot. Didn't get a log of it yet but I've seen it several times and I'll post it the next time I look at it. Anything else I try it detects the device but then tells me it's in a "unknown mode" and to reboot and try "adb reboot edl". Which is exactly how I got it there in the first place.