Abstract: A microcomputer terminal system in which all input/output devices communicate with a microcomputer through a system bus. The microcomputer includes a microprocessor and a memory. Programs are stored in the memory of the microcomputer. The input/output devices include a keyboard and a cathode ray tube display. Through a read/write memory for the input/output devices interconnecting the keyboard and the cathode ray tube display with the system bus, the microprocessor, the keyboard and the cathode ray tube display perform their respective internal operations independently of the other.The keyboard selectively produces signals representing character data and control data in a serial manner. The data, along with a strobe signal, are entered into a keyboard encoder circuit and from there into the read/write memory for the input/output devices and thence to the read/write segment of the microcomputer memory.

Abstract: A microcomputer terminal system in which all input/output devices communicate with a microcomputer through a system bus. The microcomputer includes a microprocessor and a memory. Programs are stored in the memory of the microcomputer. The input/output devices include a keyboard and a cathode ray tube display. Through a read/write memory for the input/output devices interconnecting the keyboard and the cathode ray tube display with the system bus, the microprocessor, the keyboard and the cathode ray tube display perform their respective internal operations independently of the other.The keyboard selectively produces signals representing character data and control data in a serial manner. The data, along with a strobe signal, are entered into a keyboard encoder circuit and from there into the read/write memory for the input/output devices and then to the read/write segment of the microcomputer memory.