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System Unit
You can choose from a range of three system units:
•
IBM 5371 System Unit Model 12
•
IBM 5371 System Unit Model 14
•
IBM 5371 System Unit Model 16.
The three models provide a choice of memory capacity, diskette/disk
configurations, and feature slots. Therefore, before you make your choice,
you must:
•
Calculate how much memory your applications will need.
•
Decide on the most suitable diskette/disk configuration.
•
Decide what features you want.
Calculating Memory
To determine the amount of memory that you need:
1.
Consider your memory requirements for graphics pictures, segments,
and symbol sets.
2.
Consider your memory requirements for Personal Computer
applications.
3.
Consider your memory requirements for the Graphics Control Program.
4.
Use the tables in Appendix E to calculate your total memory
requirements.
Some typical scenarios for work stations with various amounts of memory
available to them are given in Appendix C.
Memory Requirements for Graphics Pictures
For a 5279 Color Display with a 5278 Display Attachment Unit, you must
allocate memory for segments and symbol sets for host-computer and local
(GPI) sessions.
Note: For a 5379 Display with a 5378 Display Control Unit, a separate area
of fixed size (64 kilobytes) is used for this purpose.
Typically, business and general graphics pictures need up to 30 kilobytes of
memory for segments. Many simpler pictures may require only five to ten
kilobytes of segment memory.
66
Introducing the IBM 3270 Personal Computer/G and /GX Work Stations
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