To my knowledge, it appears to be the samuire the F-16 to be MMC (Modular Mission Computer) compatible, e as the A-10, but on an F-16, and does not requnlike the JHMCS. This is why it is popular for ANG units to get it, as most F-16s in the ANG are not MMC-compatible.
Though I do wish it was in DCS tho unfortunately, the file is encrypted so there's no good way to make it a mod