GDDM-GKS V1R1 Programming Guide and Reference
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Workstations

GDDM-GKS V1R1 Programming Guide and Reference
SC33-0334-00
GKS workstations are abstract devices providing logical interfaces to physical devices. GKS identifies its workstations by means of workstation identifiers that you assign, and by workstation types.
In this book, the term workstation is also used to refer generally to the physical devices used with GDDM-GKS. GKS supports three categories of physical-device workstations:
Output
Output only
Input
Input only
Outin
Output and input.
Examples of physical-device workstations are graphics terminals, plotters, and printers.
This implementation of GKS also includes segment capabilities, providing a fourth category of workstation for segment storage:
WISS
Workstation independent segment storage.
The WISS is a virtual device that allows pictures to be stored independently of any particular physical workstation.
There are also two GKS metafile workstation categories:
MI
Metafile input
MO
Metafile output.
(GKS metafiles are described in a later section.)
GDDM-GKS allows a maximum of five workstations to be open at any one time.

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