On Thu, 21 May 2020, Serge Semin wrote: > There are five MIPS32/64 architecture releases currently available: > from 1 to 6 except fourth one, which was intentionally skipped. > Three of them can be called as major: 1st, 2nd and 6th, that not only > have some system level alterations, but also introduced significant > core/ISA level updates. The rest of the MIPS architecture releases are > minor. Well, strictly speaking R3 added microMIPS support, which was all but minor (of course there were minor updates too, such as 2008-NaN support). Maciej