Terminal Descriptions; Diaplay System; Keyboard - hazeltine ESPRIT Reference Manual

HI-1094
3_0 TERMINAL DESCRIPTION
This section describes the basic features of the Esprit terminal.
3.1 Display System
The video display used in the Esprit is a high quality, high resolution, 12 inch display using P31 green-
on-black phosphor and a non interlaced raster scanning method which provides crisp and easy-to-read
character reproduction on a nonglare screen. Characters are produced using a 7X9 dot matrix for
uppercase and a 7X 11 dot matrix for lowercase. Two line decenders provide better readability for lower-
case characters.
Character patterns are formu lated with in a 9X 12 window. There is 2 dot spacing between character
columns and 3 dot spacing between character rows with ample separation between adjacent characters.
The character set consists of all 128 ASCII codes. However, the 32 control codes are displayable only
in MONITOR mode, which may be set or reset at the keyboard. This mode is extremely useful as an
aid in program development and for communication line debugging. The displayed patterns for control
codes are brief 2-character forms of their standard abbreviations. See Appendix A for actual font.
The display has a screen capacity of 1920 characters organized as 24 lines of 80 characters each.
The terminal cursor has many representions; blinking or steady, block or underline. It can be selected
at the operator's convenience and defaults to a steady block filling the whole character window. When
the cursor is superimposed on a non-blank character, the character will show through the cursor in
reverse video.
The Esprit provides a programmable character-by-character video attribute which may be high-intensity,
reverse video or underline at 11th line. The representions are selected through the control switches
located on the rear panel.
3.2 Keyboard
The terminal has a typewriter style keyboard which is permanently attached. The keyboard is decoded
and debounced by software scanning which provides high stability and reliability. The keyboard
consists of a 59 key main keyboard, a 14 key numeric pad for fast numeric data entry, 4 special func-
tion keys for the cursor movement and the auxiliary interface control, 3 special function keys for
supporting BLOCK mode operation and 1 "LOCAL" key for LOCAL Mode operation.
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