Not very sure which one you need.
For Intel ICH series SPI 86 87 command please reference to this post:
http://www.samedisk.com/cht/forum/viewtopic.php?t=139If you're EC(KBC) user, please let us know your IC vendor.
SPI 86 87 command is defined by SAMEDISK after survey many Board & Chip design. This is the most safe way to debug an unknown bug, even just CPU can run few steps after power-on.
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USB SPI, NOR, NAND, I/O, Emulator, Romter, ICE
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