It also is the computer’s EPROM ... the CMOS Z80 chip to play nice with the other modern chips like the ATMega. This is a great retro project. We can’t help but notice the IC pin labels ...

There have been a lot of different mass storage methods over the relatively short lifespan of the computer. Magnetic tapes, drums, all sorts of disks, and flash memory have each had their time.

Retroid's next flagship device, presumably the Retroid Pocket 6, will have one of Qualcomm's new gaming-focused chipsets.