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Diskette/Disk Configurations
Choose the diskette or disk configuration that is best suited to your
applications.
A single 360-kilobyte diskette in the system unit meets the minimum
requirement for running PC DOS and the Graphics Control Program.
The decision on whether a second diskette is needed mainly depends on the
operating requirements of the local PC application programs you wish to
run. If a second diskette is available, several Graphics Control Program
operations will be simplified, especially those involved in creating and
retrieving data such as print spooling and customization of the work
station.
If a fixed disk is available, the Graphics Control Program will use it for
loading the system and for print spooling. This improves performance and
reduces the need to handle diskettes.
The amount of space needed on diskette/disk to hold a print file in picture
interchange format is the same as the memory needed to display the picture
plus a segment holding the graphic representation of any alphanumeric
data in the picture. The segment could include programmed symbol set
definitions.
Models of System Unit
Figure 31 shows:
•
How much memory you can have in each model of system unit
•
Any features you need to provide that memory
•
The diskette/ disk configurations that are available with or without an
IBM 5161 Expansion Unit
•
Configurations that cannot have both the IEEE-488 Adapter and the
Asynchronous Communications Adapter.
Choose one model of system unit for each work station from Figure 31.
68
Introducing the IBM 3270 Personal Computer/G and /GX Work Stations
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