[coreboot] Does anyone know about SMSC KBC1126?

Iru Cai mytbk920423 at gmail.com
Sun Sep 25 15:35:44 CEST 2016


I'm trying to work with some HP machines. I disassembled these machines and
saw they the EC chip SMSC KBC1126-NU. I read the backup firmware and can
see strings like `8051 RESET`, and I found if I modify certain part of the
firmware, the machine will fail to power with some LEDs blinking, so I know
the EC firmware is in the BIOS chip, and it's an 8051 program.

I searched about this chip, and some people say the EC chip also contains
program. I can't find anything about this chip, and coreboot wiki has
KBC1122 and I only found a 5-page product review on the Internet. I don't
know if there's anyone know about this EC. I want to know about:
- Where is the entry point of the EC firmware in the BIOS chip
- How this EC chip does the power management and keyboard control

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