Worked great even on very old hardware.
For RS232 WiFi Wireless Modem for Vintage Computers
I hooked this up to my NEC PC-8201a and in just a few minutes, I was hitting BBSs like it was 1984. The setup was easy, though I did have to configure the RS232 port on my NEC before it would talk to the modem (just like with any other modem). It worked fine with the NEC's low-rez (40x8 char) screen and limited refresh rate. If you want to take a vintage machine online, I can't think of an easier way.
