gtps4m27 | System Generation |
After a period of planning, the desired configuration SIP stage I macros are coded to define the database, the communications network and I/O devices, system operation, main storage requirements, and so on. The FACE table generator program (FCTBG) is used to read database definitions in the stage I definitions and produce a FACE table that mirrors the definitions in the stage I material. Next, the stage I deck is assembled. If any errors are found during assembly, error messages (in the form of assembler MNOTEs) are issued and the job stream is not produced. The errors must be resolved satisfactorily before the job stream is produced. The system generation error messages are found in Messages (System Error and Offline).
If no errors are detected, a job stream consisting of job control language (JCL) statements and source code is produced. During stage II, this job stream is run under MVS control to select and process modules from the IBM distribution libraries and optional user libraries to form the new system.