.spd.hex files - serial presence detect. These are not blobs
see JEDEC standard or https://en.wikipedia.org/wiki/Serial_presence_detect
These are added to the nonblobs file

src/northbridge/intel/nehalem/raminit_tables.c"
src/northbridge/intel/sandybridge/raminit_patterns.h
These are used by native raminit for the relevant platforms, and are not blobs

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