u/SalmonSoup15

So, I've been decompiling the r7's firmware, and I've just crossed 10% decompiled. I figured I'd share some interesting findings.

1. The self test is entirely fake (I think we all knew this)

Basically how the self test works, it just writes a fake alert frame into the same memory block that the alert screen draws from and then the splash screen handler triggers the alert screen. Theres no pass/fail, it returns 0 if it finished and 1 if you stopped it.

2. There is no screen buffer at all. I don't know why. Pixels are drawn directly to the display controller.

3. There are 7 alert commands. X is 1, K is 2, 5, 8, and 9 (8 and 9 seem to be for mrcd/gatso) and then Ka is 3 and 6. The DSP sends these attached to signal frames, I think. Not entire sure but it seems like that how it works.

There are a ton of other little things, and some nitty gritty things like the false alert filter and the connection to the DSP, but I don't fully understand those yet so I'm gonna hold on attempting to explain them.

I've been decompiling the firmware for the r7, but I've gotten stuck on the audio because I don't know what the audio IC part number is, thus I don't know the codec. Does anyone have an r7 that they've torn apart and can identify the audio ic? I've tried looking at online photos but it's a bit too blurry to make out the part number.

I'm going to Kauai soon, and I looked on meshmap and it looks like there's absolutely no nodes there, I assume that's just an artifact of how meshmap gets its nodes, or are there actually no nodes in kauai?