Data communications system with automatic communications mode

• US 4,519,029 A
• Filed: 05/18/1981
• Issued: 05/21/1985
• Est. Priority Date: 05/18/1981
• Status: Expired due to Term

• Current Assignee: Texas Instruments, Inc.
• Original Assignee: Texas Instruments, Inc.
• Inventors: Thompson, E. Earle
• Primary Examiner(s): Chan, Eddie P.
• Assistant Examiner(s): Wiens, Tim A.
• Application Number:
  US06/264,882
• Time in Patent Office: 1,464 Days
• Field of Search: 364/200, 364/900
• US Class Current: 709/227
• CPC Class Codes: G06F 13/4063 Device-to-bus coupling
• CPC Class Codes: G06F 13/4226 with asynchronous protocol
• CPC Class Codes: G06F 15/17 using an input/output type connection, e.g. channel, I/O port

Abstract

A data communication system in which a host data processing system is responsive to an automated sequence of data processing request signals from a remote data processing system. The remote data processing system includes a means for generating and storing in a nonvolatile read/write memory a log on signal which initiates the communications and causes the host system to be responsive to the remote system, a plurality of data processing request signals specifying operations to be performed by the host system and a log off signal for terminating the data communications. Special data processing request signals may include a predetermined delay before transmission of the next data processing request signal by the remote system or may require the host system to transmit a predetermined response signal in order to enable continuation of the sequence of data processing request signals from the remote system. The remote system may be constructed in order to inhibit transmission of the next following data processing request signal until a predetermined time after the last received signal from the host system preferably the remote system includes a memory for storing signals received from the host system in response to its data processing agent signal and means for operator review of this memory after log off.

Claims

1. A data communications system comprising:

a host data processing system for performing predetermined data processing functions and for generating output signals comprising the results of said predetermined data processing functions in response to receiving data processing request signals, said performed data processing functions corresponding to said received data processing request signals;

a data transmission means for transmitting signals generated by said host data processing system and for transmitting signals to said host data processing system; and

a remote data processing system having means for receiving output signals from said host data processing system transmitted by said data transmission means, means for generating an operator selected set of data processing request signals having an operator selected order, memory means for storing said set of data processing request signals, means for generating a time interval signal corresponding to an operator selected time interval and storing said time interval signal in said memory means, a memory access means for recalling said set of data processing request signals from said memory means in said operator selected order in response to an operator initiation signal and output means connected to said memory means for applying said recalled data processing request signals to said data transmission means for transmission to said host data processing system, said memory access means further comprising means for recalling said time interval signal in an operator selected position in said operator selected order of said set of data processing request signals and means for causing a delay in said recall of the next sequential data processing request signal upon recall of a time interval signal, said delay equal to said operator selected time interval.

2. A data communications system as claimed in claim 1, wherein:

said remote data processing system further comprises output signal memory means connected to said receiving means for storing received output signals therein, output signal memory access means for recalling an operator selected portion of said output signals stored in said output signal memory means and output means connected to said output signal memory means for generating an operator perceivable output corresponding to said recalled output signals.

5. A data communications system as claimed in claim 1, wherein:

said host data processing system further comprises means for generating a data processing completion signal upon completion of said data processing function corresponding to an inhibit data processing request signal and applying said data processing completion signal to said data transmission means;

said data processing request signal generating means further comprises means for generating an inhibit data processing request signal;

said memory access means further comprises means connected to said receiving means for inhibiting recall of the next sequential data processing request signal from said memory means upon recall of said inhibit data processing request signal until receipt of said data processing completion signal.

6. A data processing system as claimed in claim 1, wherein:

said data processing system further comprises an input means for generating operator selected input signals; and

said data processing request signal generating means and said memory access means together comprise a central processing unit connected to said receiving means and said input means for performing data processing functions under program control, a plug-in port connected to said central processing unit and a plug-in module having a connector for connection to said plug-in port and a read only memory means connected to said connector for permanently storing therein a control program for controlling said central processing unit via said plug-in port to generate said set of data processing request signals in response to said input signals and apply said set of data processing request signals to said memory means for storage therein, and to recall said set of data processing request signals in said generated order in response to a predetermined input signal.

3. A data processing system comprising:

receiving means connected to a data transmission means for receiving signals transmitted by the data transmission means;

means for generating an operator selected set of data processing request signals having an operator selected order;

memory means for storing said set of data processing request signals;

means for generating a time interval indication of an operator selected time interval and storing said time interval indication in said memory means;

memory access means for recalling said set of data processing request signals from said memory means in said operator selected order in response to an operator initiation signal, said memory access means further comprises means for recalling said time interval indication from said memory means in an operator selected position in said operator selected order of said set of data processing request signals and means for causing a delay in said recall of the next sequential data processing request signal upon recall of a time interval indication, said delay corresponding to said operator selected time interval, and

output means connected to said memory means for applying said recalled data processing request signals to said data transmission means for transmission.

4. A data processing system as claimed in claim 3, further comprising:

received signal memory means connected to said receiving means for storing received signals therein;

received signal memory access means for recalling an operator selected portion of said received signals stored in said received signal memory means; and

output means for generating an operator perceivable output corresponding to said recalled received signals.