Cool info. However, as not to over-complicate things and for the simple sake of identification, peeps can just look for the “SH-2” text (as per the image) on the chip and they’ll know it’s a standard.for the record: on the photo above is NOT standard SH-2 CPU, but a bit custom chip for Sega. "standard" SH-2 chip is HD6417604
speaking in general - it seems all the Hitachi/Renesas CPUs labeled HD64170xx is the customized CPUs for 3rd party hardware manufacturers.