HOST FORMS DESCRIPTION LANGUAGE• Conversion from .FRM to metacode. This feature isimplemented as a stand-alone utility program. For detailssee Appendix D.HFDL also allows you to take advantage of the addedfeatures of the Xerox 4650 Printer (600 dpi forms).PrerequisitesYou should have a working knowledge of your Multiple VirtualStorage (MVS) operating system, and be able to perform thefollowing procedures:• Create and edit a text file on your system.• Use JCL to compile a job on your system.• Use JCL to access a file through your resource managementinterface, and download your selected file to your Xeroxlaser printing system.Operating environmentThe host computer, peripheral devices, printers, and softwaremake up your printing system. This section describes thehardware and software requirements to operate HFDL.Hardware requirementsHFDL 3.2 operates on IBM S/370 and S/390 series computersrunning the MVS/XA or MVS/ESA operating system.Software requirementsHFDL operates in batch mode under the IBM MVS/ESA andMVS/XA operating systems. It does not use operating systemfeatures specific to any MVS release level. Any specificrequirements for your site are provided during installation anddescribed in theHost Forms Description Language 3.2 for IBMMVS Installation Guide.Xerox laser printer supportHFDL supports Xerox centralized and decentralized printers.Centralized printersCentralized printers are high–speed, high–volume printersgenerally used in central locations for printing data processingoutput from mainframe computers. They may be attached to thehost computer by an S/370 channel or attached remotely by an871 Communications Module (CM) or BARR SNA.Table 1–1 lists the centralized printers that HFDL supports andthe associated operating system software (OSS).1–2 HOST FORMS DESCRIPTION LANGUAGE 3.2 FOR IBM MVS CREATING FORMS