The "CMOS" on the same bus as the TPM was Macronix Serial Multi I/O (MXSMIO™) Flash
https://www.mxic.com.tw/en-us/products/NOR-Flash/Serial-NOR-...
https://www.mxic.com.tw/en-us/products/NOR-Flash/Serial-NOR-...
my curiosity got the better of me and i looked it up and thought other people might be curious too, and I thought it might save people time if I gave the details
Only as an example (and not actually usable in this case unless a chip-off is done), there is what I call a cross-breed between an octopus and a acupuncturist:
https://blog.acelaboratory.com/pc-3000-flash-spider-board-ad...