Figure 3-6.—Example of a display control unit (DCU).
l Loading and initiating operations
l Operator interfacing
. Testing
l Logic power indications
l Overtemperature indications
DISPLAY CONTROL UNITS
Display control units (DCUs) have controls and
indicators for powering up/down the DCU, loading and
operating programs, initiating and monitoring
computer operations, battle short operations, and
testing the computer. Although you can only control
DCU power, it is a good idea to review the power
up/down procedures for the computer set. DCUs have
operator panels and alphanumeric displays and can be
divided into four physical areas. They are as follows:
Display
DCU panel control
CPU (bootstrap) and IOC (Real-Time Clock
[RTC] Select)
Operations and testing
See figure 3-6 for an illustration. You can control up to
two CPUs and IOCs with this DCU. The keys used by
3-9
