Like today's modems, an I0 device sends a packet in a string of eight-bit bytes, each framed by start and stop bits.
Like today's modems, an I0 device sends a packet in a string of eight-bit bytes, each framed by start and stop bits.
I0器物和今天的数据机一样，所传送的封包内含一连串八位元的位元组，封包前后并由起始位元与结束位元区隔。