sophisticated microprocessor controlled assemblies
using the functions of the controlling devices. The data
containing display panels and data entry keyboards (fig.
display capability is used to provide hardware status and
8-17) on a display control unit (DCU).
other system description data to you. The data display
In all cases, the man/machine interface provides
capability can also allow you to react in some cases
you with some form of data entry and data display
using menus to choose various operations. The
capability. The data entry function is used to enter
man/machine interface is the primary path you use
commands or set parameters for computer operations,
when requesting information on computer faults and for
status, and test activities. The data entry can be made
the computer to display the requested data.
Figure 8-17.Display panels and data entry keyboards on a display control unit (DCU).