Wonder if there's pocket computer emulator out there ....

Yesterday I had gathering with my old pal dated back from my primary school days. We brought up an issue about playing some old programmable calculators which made up of major part of my teenage days. Machines like Casio FX-502P, FX-602P, EL-512, FX-702P, FX-3600P and then Sharp PC-1500, PC-1250 and even the PC-1600. Damn, now I even start to remember those handheld computers (A4 size) like NEC PC-8201, Casio FP-200, Epson HC-20 ....

Gee, I wonder if there's any web site, or even emulator, dedicated to all those Japanese classic machines.