Texas Instruments 990 Installation And Operation

~-------
~ 945423-9701
COMPUTER
(A) 134308
ALARM ENABLE
VDT 0
MODEM AUDIO
\
CONTROL
VIDEO DATA
J
91 1
LOGIC
DISPLAY
\
UNIT
..
KEYBOARD DATA
TERMINAL STATUS
J
J
...
911
VDT
-
CONTROLLER
CRU SERIAL
r
+-j AUDIO FROM
,.....
DATA
TO/FROM
COMPUTER
(A)134309
+-
------
MODEM MODULE
"-+
+- (JUMPER INPUT)
KEYBOARD
ALARM ENABLE
VDT 1
MODEM AUDIO
CONTROL
7
911
LOGIC
VIDEO DATA
DISPLAY
KEYBOARD
DATA
\
UNIT
..
..
TERMINAL STATUS
)
I"'"
KEYBOARD
Figure 1-3. Major Terminal System Components
VDT O-CONTROL LOGIC
•
MEMORY
•
KEYBOARD
•
BU IL T-IN-TEST
•
VIDEO OUTPUT LOGIC
•
ALARM
r
TIME
BASE
GENERATOR
~
VDT l-CONTROL LOGIC
•
MEMORY
•
KEYBOARD
•
BU IL T-IN-TEST
•
VIDEO OUTPUT LOGIC
•
ALARM
AUDIO
AUDIO
FROM MODEM
}
TO/FROM
DISPLAY UNIT
}
TO/FROM
DISPLAY UNIT
FROM MODEM
Figure 1-4. Model 911 VDT Controller Block Diagram
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}
-
1-4
Digital Systems Division

Texas Instruments 990 Specifications

General

Brand	Texas Instruments
Model	990
Category	Desktop
Language	English