MSX was a 1983 standard rather than a single machine, backed by Microsoft and built by Sony, Panasonic, Philips and others. It was huge in Japan, the Netherlands and Brazil, and it is where Metal Gear and Castlevania originally began.
Full-speed on all R36 models. Requires MSX system ROMs, and keyboard-driven titles need a virtual keyboard.
The chip is the same in every model, so the rating is too. What differs is the screen: 4:3 panels suit most home consoles, the 1:1 square panel suits Game Boy and GBA and shows 4:3 games with bars.
The R36 handheld family runs MSX titles with perfect compatibility out of the box.