Hello,
I've recently got a new laptop from Acer (Predator Helios 300) and I tried to dump its BIOS from a separate PC running Kali linux with flashrom v1.1. I used a BusPirate SPI programmer and a SOIC-8 clip on the BIOS chip after carefully removing (clipping) it from the mobo.
Unfortunately the chip was not recognized, and the process failed to read anything. I tested the connections by placing a spare Winbond chip into the clip, and it read perfectly fine.
The laptop BIOS chip was labeled "XMC QH128AHIG" I did some googling for this name and apparently there are some new SPI NOR Flash chips on the market by a chinese company called XMC. My specific chip was actually called "XM25QH128A", but there are whole series available.
Datasheet for my chip: http://www.xmcwh.com/cn/Uploads/2019-08-26/5d63754eed501.pdf
Product pages: http://www.xmcwh.com/index.php?s=/cms/list/61.html http://www.xmcwh.com/index.php?s=/cms/list/62.html http://www.xmcwh.com/index.php?s=/cms/list/63.html
Flashrom bus pirate log: https://pastebin.com/c2c2tmj0
Regards, D
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qwrd