GDSX (Extended General Device Support) Manual

About This Manual
Extended General Device Support (GDSX) Manual—529931-001
xxi
Systems Analysis
Systems Analysis
Readers doing systems analysis might need to do the following tasks:
•
Understand the range of GDSX applications.
•
Learn the basic internal control flow of a typical GDSX application.
•
Determine what hardware and software would be necessary to use GDSX for a
given application.
•
Understand the experience and level of expertise necessary for developers.
•
Identify guidelines and restrictions relevant to the design and development effort,
including those applying to space, memory pools, and procedure calls.
•
Understand the restrictions on communication between GDSX and other
processes.
•
Understand the different levels of fault tolerance supported by GDSX.
•
Determine whether GDSX can be used to develop a particular application.
Understand the typical environment
of executing DEVICE^HANDLER
tasks, as well as the typical basic
structure of DEVICE^HANDLER
code
XX
Understand the purposes of the
various control structures and how
to access them
XX
Determine which user exits need to
be developed for an application
XX
Code user exits necessary for an
application, using the available
TSCODE utilities and the pseudo
procedures
X
Interpret GDSX abend, trap, fault,
EMS event, and configuration error
messages
XXX
Run a trace in GDSX X X
Table i. Summary of GDSX Tasks (page 2 of 2)
Task
System
s
Analysi
s
Design and
Development Operations Support