IBM OS/390 manual Implementing JES2, Setting Up the Required Resources, End-of-page Sensing

can write your own using JES2 exit 1. (For PSF controlled printers, use PSF exits APSUX01 and APSUX02.)

For separators between individual data sets or data set copies, you must specify SEPDS=YES on the PRT(nnnn) statement and provide a JES2 Exit 15 for JES2 controlled printers. (For PSF controlled printers, use PSF exit APSUX03.)

10.1.1.6 End-of-page Sensing

POWER, by storing a carriage control tape image, allows a program to ²sense² channel 12 or end-of-page. This is not supported in JES2. Line count logic must be substituted. You can change the application to count lines under VSE prior to the MVS conversion.

10.1.1.7 FCB Incompatibilities

POWER permits the ²channel one² position to be on any line of the page. JES2 requires Channel 1 to be on Line 1 for all printers controlled by JES2.

This restriction is in place because JES2 uses a skip-to-channel-1 to reposition the printer to the top of forms when it goes through device setup.

Also see 10.3.4.8, ªFCB Naming Differencesº on page 217.

10.1.1.8 Other Differences

Incompatibilities such as JCL and Operator Commands are covered in other chapters:

∙Chapter 4, ªJob Control Language (JCL) Differences and Considerationsº on page 69

∙Chapter 28, ªOrientation to OS/390 Console Operationº on page 443

10.2Implementing JES2

This section describes the significant migration and conversion activities to implement JES2 for the first-time user.

10.2.1 Setting Up the Required Resources

Both POWER and JES2 require DASD files to spool the jobs and their output, and queues to manage them. The following figure describes the various types of spool and control files of VSE/POWER and their equivalent file types in JES2.

Chapter 10. POWER and JES2 209