-#For high speed serial lines use these instead.
-#device sio0 at isa? port "IO_COM1" tty irq 4 vector siointr
-#device sio1 at isa? port "IO_COM2" tty irq 3 vector siointr
-#device sio2 at isa? port "IO_COM3" tty irq 5 vector siointr
-#device sio3 at isa? port "IO_COM4" tty irq 9 vector siointr
+#For high speed serial lines.
+device sio0 at isa? port "IO_COM1" tty irq 4 vector siointr
+device sio1 at isa? port "IO_COM2" tty irq 3 vector siointr
+device sio2 at isa? port "IO_COM3" tty irq 5 vector siointr
+device sio3 at isa? port "IO_COM4" tty irq 9 vector siointr