| 摘要 |
A digital answerback circuit for providing a computer with information identifying a remote terminal is disclosed. A signal received from the computer initiates operation of the answerback circuit. This signal enables an electronic counter to count clock pulses and produce a binary output which corresponds to the number of clock pulses counted. An electronic decoder then decodes the binary output and produces an output signal on a specific and separate line for each clock pulse received. Each decoder output signal is applied to a separate and specific input of a read only memory which results in a code, preprogrammed for the specific input and contained in the read only memory, being sent back to the computer. These preprogrammed codes contain the necessary identification information and may further contain any other information useful or necessary to the computer.
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