HP 3000 Manuals HP 3000 Manuals
Chapter 6 Using Printers with Pass Thru Spoolable HP printers supported by MPE can emulate IBM 3287 printers. You can use Pass Thru with any of the printers listed in appendix C. However, you cannot use a printer that is attached directly to a terminal. Pass Thru requires that a printer be configured into MPE as a system printer. Pass Thru acquires MPE ownership of HP 3000 printers. Then, for each write from the host application to a printer, SNA IMF formats data and sends it to a spool filedestined for the corresponding printer. The default name of the printer file is a string of blank characters, but you can specify a different name for the printer file in the PFNparameter of the command that starts Pass Thru. (See chapter 3.) After your Pass Thru session has started, you can enter printer commands and send emulated IBM 3287 keys by issuing the following MPE command: :RUN TTSSON.PUB.SYS, COMMAND; INFO=" info string " The info string may contain one or more printer commands. See "Entering Printer Commands and Adjusting Page Length," later in this chapter. SNA IMF supports both LU.T1 and LU.T3 printers. It accepts both LU.T1 and LU.T3 sessions on the same printer. LU.T1 printers use the SNA Character String (SCS)data stream and SCS control codes. SCS control codes allow you to define horizontal and vertical formatting of paper forms. Appendix B lists the SCS control codes emulated by Pass Thru. In an LU.T1 printer session you can emulate pressing the IBM 3287 HOLD PRINT, PA1, PA2, CANCEL, and ENABLE PRINT keys. You cannot emulate these keys in an LU.T3 printer session. See "Entering Printer Commands and Adjusting Page Length," later in this chapter.