Introduction; Ibm 3278 Display Station - IBM 3270 Operator's Manual

Introduction
This chapter is provided for experienced operators of the IBM 3275 and 3277
Display Stations who will be operating an IBM 3278 Display Station attached
to a 3274 Control Unit or to a 3276 Control Unit Display Station. The two
groups of machines are similar in operation, and only the differences in opera-
tion are described here. This chapter refers you to sections of Chapters 2, 3,
and 4 for detailed descriptions of some of the 3278 indicators, switches,
features, and keyboard operations. If your 3278 is not attached to a 3274
Control Unit or to a 3276 Control Unit Display Station, there may be differ-
ences other than those described here. Refer to the appropriate appendix for
a description of those differences.
If possible, sit at a 3278 display as you read this chapter so that you can use
the switches and keys as you read about them. If your display station has a
keyboard attached and if some point is not clear as you read, pause for a
moment to press the key and watch the result.
The IBM 3278 Display Station is shown in Figure 5-1. The 3278 (like a
3277) communicates with the host system through a control unit.
Figure 5-1. IBM 3278 Display Station
Chapter 5. Differences between the 3275/3277 and the 3278 5-3