A TELETYPE INTERFACE FOR THE M3 COMPUTER
Akins, Dennis R
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An interface design to incorporate a Model 33 Automatic Send- Receive Teletypewriter into the M3 computing system is described in detail. In addition to overcoming the previous limitations in input procedures, the teletype and interface logic provide for interactive communication between the operator and the computer. Input to the M3 occurs either with or without a hard-copy record of information. Basic characteristics of a time sharing system are obtained by employing an input cycle which transfers control of the central processor to one of two program branches depending on whether or not input occurred during that cycle. Integrated circuit technology is used in the design to facilitate a compact, low cost device with high reliability.