Maintaining the System Image Library

This information describes how to maintain the system image library, SYS1.IMAGELIB. SYS1.IMAGELIB is a partitioned data set (a PDSE is not supported) containing universal character set (UCS), forms control buffer (FCB), and printer control information for DFSMSdfp–supported IBM® printers in the following forms, depending on the type of printer:

UCS images (also called modules)
UCS image tables
FCB images (also called modules)
Control modules.

The system uses UCS images and image tables to relate a user-requested UCS to the corresponding print band/train. Most IBM standard UCS images are included in SYS1.IMAGELIB during system installation. Note that when you install a new release of DFSMS it replaces images that have the IBM-supplied names. If you modified or replaced any of these you might want to maintain a separate copy of them. The following table shows the standard character set images for the IBM 1403, 3203, and 3211 printers:

Printer	Images
1403 or 3203	AN, HN, PCAN, PCHN, PN, QN, QNC, RN, SN, TN, XN, YN
3211	A11, G11, H11, P11, T11

For detailed, printer-specific information, or to determine which print bands/trains are available, see the publications listed in the following table:

Publication Title	Contents
IBM 2821 Control Unit Component Description	Information on creating a user-designed chain/train for the 1403 Printer.
IBM 3203 Printer Component Description and Operator's Guide	Information on creating a user-designed train for the 3203 Printer.
IBM 3211 Printer, 3216 Interchangeable Train Cartridge, and 3811 Printer Control Unit Component Description and Operator's Guide	Information on creating a user-designed train for the 3211 Printer.
IBM 3262 Model 5 Printer Product Description	Information on band IDs for the 3262 Model 5 Printer.
IBM 3800 Printing Subsystem Programmer's Guide	Information on planning for, conversion to, and use of the IBM 3800 Model 1 Printing Subsystem.
IBM 3800 Printing Subsystem Model 3 Programmer's Guide: Compatibility	Information on planning for, conversion to, and use of the IBM 3800 Model 3, 6, and 8 Printing Subsystem.
IBM 4245 Printer Model 1 Component Description and Operator's Guide	Information on band IDs for the 4245 Printer.
IBM 4248 Printer Model 1 Description	Information on band IDs for the 4248 Printer.
IBM 6262 Printer Print Band Manual	Information on band IDs for the 6262 Printer.
IBM 6262 Printer Model 014 User's Guide	Information on operating and maintaining the 6262 Model 14 Printer.

To use the information in this chapter, you should be familiar with the publications listed in the following table:

Publication Title	Contents
z/OS DFSMS Macro Instructions for Data Sets z/OS DFSMS Macro Instructions for Data Sets z/OS DFSMS Macro Instructions for Data Sets	Describes the SETPRT macro. You can use it to specify the images (modules) that you want.
z/OS DFSMSdfp Utilities	Describes the IEBIMAGE utility program.
z/OS MVS JCL Reference	Describes the CHARS, MODIFY, UCS, and FCB parameters of the DD statement, that are processed at OPEN.
z/OS JES2 Initialization and Tuning Guide	Contains JES2 reference information.
z/OS JES3 Initialization and Tuning Guide	Contains JES3 reference information.

Table 1 provides information about the printer-specific contents of SYS1.IMAGELIB.

Table 1. SYS1.IMAGELIB Contents
Printer Type	UCS Image	UCS Image Table ⁸	FCB Image	Control Module
1403	X
3203 ¹	X		X
3211	X		X
3262 Model 5 ^{2, 4, 5}		X	X
4245 ³		X⁶	X
4248 ³		X⁶	X
6262 Model 14 ^{2, 4, 5}		X	X
3800				X ⁷

Notes to Table 1:

The IBM 3203 Model 5 Printer is treated as a 3211 Printer by JES, except that the 3203 Model 5 does not support the 3211 indexing feature and ignores any indexing commands from JES. The 3203 Model 5 uses its own unique UCS images, but uses 3211 FCB images.
You can operate this printer as if it were a 4248 operating in 4248 native mode. In this case, use the 4248-related UCS sections of this chapter. The UCS information is contained in image tables.
You can operate this printer in native mode, in which case the UCS information is contained in image tables. You can also operate these printers in 3211 compatibility mode, in which case the UCS information is contained in UCS images; you should then use the 3211-related UCS sections of this chapter.
This printer uses the same image table as the 4248 printer. However, it does not support variable printer speeds or the horizontal copy feature and host stacker controls of the 4248 printer.
This printer uses the same FCB image as the 4248 Printer.
The image table is supplied by IBM. The contents of the 4245 image table are shown in Table 1. The contents of the 4248 image table are shown in Table 2.
3800 Printing Subsystem control modules exist for:
- Character arrangement tables
- Graphics character modification tables
- Copy modification tables
- Library character sets
- FCB images.
You can use the IEBIMAGE utility program to create and maintain these control modules. See z/OS DFSMSdfp Utilities for details about IEBIMAGE. IEBIMAGE and SYS1.IMAGELIB are not used when the printer is running in page mode. In that case, PSF for z/O uses other types of modules from other libraries. See 3900 Product Description for more information.
Figure 1 defines and describes the structure of a UCS image table entry.