But these days, SERIAL is obsolete given Firewire/USB1/USB2.
Serial is as obsolete as my C64, C128, SX64, A1200, A2000, A3000, Mac IIci, Power Mac G3, Archimedes 310, Sun Ultra 2 and some other oldies I have.
Just because it's obsolete, doesn't mean it's not usefull anymore. Hell, we're at Amiga.org here, which is devoted to fully obsolete computers. :-)
