Data General DASHER D100 Field Engineering Manual page 11

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INTRODUCTION TO .
that support the full upper/lower caSe, alphanumeric printing
character set. Both terminals are offered with the following choice
of international character fonts: American, British, Danish/Norwegian,
French, German, Spanish and Swedish/Finnish.
The terminals communicate with a computer or communications system in
full-=duplex mode over either a c0mA current loop or EIA RS=232C
communications line. Both models support a subset of standard EIA modem
control functions that allows them to interface to Bell 103, 113 or 212
compatible modems. |
Both the D100 and D200 terminals consist of two units: an alphanumeric
CRT display, mounted on a Swivel base, and a detached keyboard. A 3.95
foot (1.2 meter) external cable connects them. Un liner the display
and keyboard function as two independent I/0 devices, while Sharing a
common asynchronous interface located in the display unit to communicate
with a computer or communications system,
The terminal's asynchronous interface transmits and receives serial
data bursts at transmission rates ranging from 50 to 19200 bits per
second. Each data burst contains 7 data bits; the remaining code
parameters (1.e., parity and number of stop bits) together with the
transmission rate are switch-selectable. | -
The display unit of both terminals has a 1920-character semiconductor
memory and a non-interlaced video monitor with a 12 inch diagonal Screen.
The screen's active area is 8.5 inches by 5.5 inches, formatted as 24
lines, 80 characters per. line.
Ali cisplayable characters sent to the display are stored in memory and
appear on the Screen as 7 wy 11 dot matrices. The non-destructive cursor
1s displayeo as a solid white tields i.e. all dots in the dot matrix
are intensiftiea. a |
All control characters sent to the display are decoded and interpreted
as either display commands or protocol characters. The latter are
ignored. In general, display commands perform the following functions:
e Control the screen and position the cursor
e Assign attributes (i.e., blinks dim, underscore, reverse
video) to displayable characters. |
© Provide terminal identification Information and place the
terminal in diagnostic mode. |
Detailed information about the display command set appears in Chapter 2.
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