Purpose Of Equipment - Texas Instruments 990 Installation And Operation Manual

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1.3 PURPOSE OF EQUIPMENT
The Model 911 Video Display Terminal provides two-way communication between the VDT
operator and the computer system. The VDT controller can be inserted into any available CRU
chassis location in the computer or expansion chassis. Together with the appropriate software
installed in the computer, the VDT allows the operator to perform the following functions:
• View the video display presented by the computer
• Enter data for display from the keyboard
• Edit any of the entered data as desired through the use of the controlling computer
program
• Store the display contents in computer memory for use by other peripheral devices
(printer, modem, etc.)
• Initiate special functions such as terminal self-test, print line, or scroll display. These
functions are activated by the program in response to input of a special keyboard
character code, or alternately, by entry of a control character at the keyboard.
1.4 OISPLA YEO CHARACTERS
Figure 1-6 illustrates the United States character set that is generated by the Model 911 VOT
controller and displayed on the CRT screen. Figure 1-7 illustrates the international set of characters
not illustrated in figure 1-6. Refer to Appendix F, figure F-9, for the additional 128 eight-bit
Japanese Katakana displayed character set.
1-7
Digital Systems Division