Mips R6 (Warrior m62xx/i6400/i6500/p6600) was already somewhat incompatible with R5 and earlier, the seventh generation nanomips i7200 was incompatible with tha

Mips R6 (Warrior m62xx/i6400/i6500/p6600) was already somewhat incompatible with R5 and earlier, the seventh generation nanomips i7200 was incompatible with that again.