Enclosure; Controller; Controller Board - Control Data Corporation INFORMATION SYSTEMS TERMINAL II Hardware Maintenance Manual

Interpretation of the code by the central computer allows
the code to be redefined before display. When used in con-
junction with the computer software, the keyboard can com-
municate a limitless number of characters, lines, and
symbols.
ENCLOSURE
The terminal is housed in a four-part integral housing con-
sisting of the base, hood, bezel/keyboard cover, and
display/touchpanel mask.
All the components, except the touchpanel brightness
control, and operator's panel, fasten to the base. The
removable hood gives access to all the modules of the
terminal, except for the keyboard, touchpanel, and
operator's panel.
CONTROLLER
The controller portion consists of two printed-circuit
logic boards: the controller board and the video board.
CONTROLLER BOARD
The controller board provides the control function and
processing capability required to support the input and
output operations and to manage their interactions. Exam-
ples of control functions are:
a. Character generation
b. Line generation
c. Instruction decoding and execution
d. Routing of messages for peripheral devices
e. Interrupt recognition and processing
The processor inputs data from, or outputs data to, the
devices/interfaces listed in table 1-1.
82100083 B
1-3
I