Control Data Corporation INFORMATION SYSTEMS TERMINAL II Hardware Maintenance Manual page 66

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• Routing of messages for peripheral devices
• Interrupt recognition and process
TELEPHONE
NETWORK
INTERFACE
PLATO
INTERFACE
PARALLEL
I/O
SERIAL
I/O
COMPOSITE
VIDEO
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KEYBOARD INTERFACE
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COMMON INTERFACE LOGIC
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I/O
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MEMORY
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MICROPROCESSOR
INTERFACE
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ME MORY CONTROL
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2K 16K 16K 32K RAM VIDEO
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EROM RAM
RAM REFRESH
LOGIC
(OPT)
DISPLAY .
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ASSEMBLY
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AC ENTRY
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POWER SUPPLY
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03333
Figure 4-1.
IST-II Terminal Block Diagram
The Z80A microprocessor, on the controller board, inputs
data from or outputs data to the devices and interfaces
listed in table 4-1. A block diagram of the controller
board is illustrated in figure 4-2.
4-2
82100083
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