CompuServe Messages

The SANA-II device driver specification archive (on Fish disks, probably in forum libraries) contains a sample driver for SLIP — Serial Line Internet Protocol. With a null-modem (or regular modem) connection and a SLIP SANA-II driver, you can use any SANA-II compatible networking protocol software over the serial ports with no additional hardware. Of course, serial is fairly slow for most purposes. I believe that there is a SANA-II driver floating around for parallel ports ala ParNet, if that's really what you're into.