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=Description=
=Description=
The input 20-byte data is copied to the NS [[FIRM]] parameter buffer at offset 0x4B0.
The input 20-byte data is copied to the NS [[FIRM]] parameter buffer at offset 0x4B0.
This is used by [[Home_Menu|Home Menu]] during TWL title-launch to pass a HMAC-SHA1 of the banner (size varies based on the banner version, etc.) to TWL_FIRM using the TWL and NTR SRL HMAC keys. This is presumably used for comparing against the HMAC stored in the [[Title_list#TWL_System_Titles|whitelist]] for titles without RSA.