Data terminal with controller for selectively modifying data transmitted to and from
First Claim
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1. A method for transmitting data between a data terminal and an external device coupled thereto, the data terminal comprising:
- an application program for controlling the operation of the data terminal and processing the transmitted data,a communications controller for controlling the internal data transfer of the data terminal, andat least one communication port, and a port controller controlling said at least one communication port, for transmitting data between said data terminal and said external device, in which method the transmitted data is processed in the application program and directed through the port controller and the communication port,wherein the improvement comprises the steps of;
carrying out a predefined modification of the transmitted data between the form of data processed by said application program and the form of data processed by said external device in a device controller using processing software installed internally in the data terminal, andimplementing the data transmission by coupling said device controller with said application program through said communications controller.
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Abstract
A data adapter functioning as an intermediary between a data terminal and a digital data transmission network is implemented by using the parts the data terminal usually comprises and by directing their activity by processor commands recorded in the memory of the data terminal.
35 Citations
20 Claims
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1. A method for transmitting data between a data terminal and an external device coupled thereto, the data terminal comprising:
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an application program for controlling the operation of the data terminal and processing the transmitted data, a communications controller for controlling the internal data transfer of the data terminal, and at least one communication port, and a port controller controlling said at least one communication port, for transmitting data between said data terminal and said external device, in which method the transmitted data is processed in the application program and directed through the port controller and the communication port, wherein the improvement comprises the steps of; carrying out a predefined modification of the transmitted data between the form of data processed by said application program and the form of data processed by said external device in a device controller using processing software installed internally in the data terminal, and implementing the data transmission by coupling said device controller with said application program through said communications controller. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A data terminal comprising, for transmitting data between the data terminal and an external device coupled thereto,
an application program for controlling the operation of the data terminal and processing the transmitted data, a communications controller for controlling the internal data transfer of the data terminal, and at least one communication port and a port controller controlling said at least one communication port for transmitting data between said data terminal and said external device, wherein the improvement comprises: means for software processing the transmitted data into a first form of data processed by said application program and a second form of data processed by said external device, said software processing means comprising; a device controller internal to the data terminal and coupled to said communications controller for transmitting data processed in said device controller, between said device controller and said application program, and between said device controller and said port controller. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A device controller in a data terminal for processing data transmitted between an application program controlling the operation of the data terminal and an external device coupled to the data terminal, the data terminal comprising:
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a communications controller for controlling the internal data transfer of said data terminal, and at least one communication port, and a port controller that controls said at least one communication port, for transmitting data between said data terminal and said external device, and wherein the improvement comprises; said device controller software processes the data internally transferred into the form of data processed by said application program and the form of data processed by said external device, and is coupled to said communications controller for transmitting data between said device controller and said application program. - View Dependent Claims (17, 18, 19, 20)
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Specification