Ancestors

Toot

Written by Manawyrm | Sarah on 2025-01-06 at 12:36

A very strong talk recommendation from #38c3:

https://media.ccc.de/v/38c3-beyond-ble-cracking-open-the-black-box-of-rf-microcontrollers

Despite the very unassuming name talking about "BLE", this talk is about something much more interesting:

Reverse engineering the Cortex-M0 RF coprocessor and engines in the TI CC13xx radio chipsets!

Those chips are basically little I/Q SDRs with a bunch of hardware offloading. TI keeps all of this hidden away very nicely -- but now they've built tooling to work with that CPU core & RF offloading directly.

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Descendants

Written by Bernhard on 2025-01-06 at 14:20

@manawyrm A laudable accomplishment. For completenes' sake the chips are IQ receivers but only single phase transmitters. For full spectrum cyber we still need to go with the rad1o / HackRF or the potential new hotness SX1255 ^^

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Written by Lukas on 2025-01-06 at 23:10

@manawyrm Ah yes, modern silicon: If they don't tell you about any CPU, chances are that there's a 8051 or a Cortex M0 hiding somewhere.

If they sell you a CPU, you'll probably get one or two more for free that they don't want to you know you about.

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Written by Gus on 2025-01-06 at 23:14

@karotte @manawyrm This talk goes all the way to the other favourite of silicon vendors: in-house undocumented ISA! :discoursechef:

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Written by Manawyrm | Sarah on 2025-01-06 at 23:44

@karotte You get several Arm cores free with your purchase of any modern AMD x86 as well 😹🤭

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Written by Q ✨ on 2025-01-06 at 23:48

@manawyrm @karotte as a treat

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Written by Marcus Müller on 2025-01-06 at 23:59

@manawyrm @karotte don't you get x86 cores with your purchase of an intel chipset for AMT? Putting more x86 in an x86 PC seems somehow less reasonable! Stop it! It's already x86!

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Written by Manawyrm | Sarah on 2025-01-07 at 00:04

@funkylab @karotte More Minix == more better (at least that‘s what Intel thought)

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Written by Marcus Müller on 2025-01-07 at 02:54

@manawyrm @karotte Hard to argue with that, though I'd vastly preferred had they used an intel i860 and ran a Mach kernel on it. Just for the shifts and wiggles.

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Written by 8051 enthusiast on 2025-01-07 at 00:22

@manawyrm @karotte and an 8051 for the usb functionality in the cipset as well (at least for the b650)

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