Terminal controller with buffer memories storing edited screen data and control method therefor
AssigneeHitachi, Ltd.
InventorHideaki Gemma
Life of this patent
Estimating the term…
Abstract
The invention relates to a terminal controller for editing formatted screen data sent from a processing unit to produce edited screen data and for transferring the edited screen data to a terminal device. The edited screen data which can be repeatedly used is stored in a buffer memory which is separately provided in the terminal controller. In response to a command from the processing unit, this data is extracted from the buffer memory so that the screen data is transferred to the terminal device without being re-edited for each transfer. The data stored in the buffer memory is subjected, if desired, to a synthesizing processing before it is sent to the terminal device.
Claims9
A terminal controller for receiving screen data sent from a processing unit, for editing said screen data, and for transferring the edited data to a terminal device having a screen data buffer memory in response to selected commands from said processing unit, comprising:
- first buffer memory means for storing formatted screen data received from said processing unit in a non-display form;
- editing means connected to said first buffer memory means for editing formatted screen data received from said first buffer memory means to produce edited screen data in a display form;
- second buffer memory means for storing edited screen data;
- and
- control means for transferring the edited screen data from said editing means to said second buffer memory in response to a first command from said processing unit and for transferring said edited screen data in said second buffer memory to the screen data buffer memory in said terminal device in response to a second command from said processing unit.
A method for controlling a terminal controller which includes a first buffer memory and a second buffer memory, means for editing screen data sent from a processing unit, and means for controlling the transfer of edited data to a screen data buffer memory in a terminal device, comprising the steps of:
- receiving formatted screen data in a non-display form from said processing unit in said first buffer memory;
- editing the formatted screen data using said editing means to produce edited screen data in a display form and storing the edited screen data in said first buffer memory;
- storing said edited screen data into said second buffer memory in reponse to a first command from the processing unit;
- and
- selectively transferring the edited screen data stored in said second buffer memory, either as it is or after being subjected to processing, to the screen data buffer memory in said terminal device in response to a second command from said processing unit.
Dependencies are inferred from the claim text.