3800 Printing Subsystem Support VM/370 Release 6 supports the 3800 printing subsystem which is a high
speed, non-impact, general purpose printer that uses electrophotographic
and laser technology to achieve printing speeds up to 20,040 lines of
copy per minute.
The following features highlight the 3800 printer: • FORMS CONTROL permits the user to select the amount of vertical space
between printed lines. Lines can be vertically spaced 6, 8, or 12
lines per inch. Different spacings can be mixed on the same page
except in the case when the 3800 printer is used as a spooling
device. • FORMS OVERLAY permits photographing of predefined data (forms) on one
or more pages. The 3800 printer supports the creation of a form on a
page and the immediate printing of data on that form. • PREDEFINED CHARACTER SETS permit the user to select predefined
character sets that contain up to 64 characters each. Different
character sets can provide different character types and sizes, and
horizontal spacings between characters. The 3800 printer supports
the simultaneous use of two character sets and optionally supports
the use of two additional character sets. The user can mix characters from different character sets on a single page. These
characters are referenced within the 3800 printer through the use of
translate tables. Up to four translate tables may be loaded at any
one time. • CHARACTER SET MODIFICATION permits the user to modify and/or extend
character sets. • COpy MODIFICATION permits the printing of predefined data (for
example, printing the same header on each page) or the suppression of
printing of selected data. • PRINTING MULTIPLE COPIES permits multiple copies of files and
datasets to be printed and/or collated without the use of
multiple-ply paper. Multiple copies of a single 3800 buffer load can
also be printed ..
DEDICATED 3800 PRINTER SUPPORT '8/370 allows virtual machines, including virtual V8/370, to attach the 3800 Frinter as a I/O device. When attached, the full cafability of the 3800 is available to the virtual machine. All the
functions previously described are available when the 3800 is used as a
dedicated device. Support for the 3800 printer is generated by the RDEVICE macro instruction which defines the 3800 device at system generation time. SUPPORT OF THE 3800 AS A REAL V"/370 SPOOLING DEVICE Virtual machines can print spool files on the 3800 printer. With two
exceptions, all previously mentioned features are supported. These two
exceptions are the use of more than one translate table for printing a Section 1. summary of Changes to the V!j370 System 1-7

given file, and the mixing of different vertical spacings on the sa.e
page or file. With regard to translate tables and character sets, once
the user starts to print a spool file with particular character sets, he
.ust print the entire file with those character sets. The RDEVBLOK, SFBLOK, SPLINK, and VSPXBLOK copy blocks allow storage of informaticn necessary for the operation of the 3800 printer. In addition, the BACKSPAC, CHANGE, QUERY, SPOOL, and START commands for CP now support
the features of the 3800 printer.
ADDITIONAL VM/370 SUPPORT OF THE 3800 PRINTING SUESYSTFft The values that control feature selection and printing on the 3800 printer are stored in tables and modules. VM/370 provides a capability,
via CP commands, to display the symbolic name of the library where they
are stored.
Before printing a spool file, VM/370 initializes the 3800 printer by
loaaing it with the tables that control feature selection and printing. VM/31Q provides a capability to purge spool files that cause errors when they are loaded into the 3800 printer. CRE1!IDG CONTROL INFORMATION FOR THE 3800 PRINTER Tvo nev serYice programs, GEllftAGE and IftAGELIE. construct or modify the
tables aad .odules that control feature selections and printing on the 3800 printer. These service progra.s save the control tables and
control modules as a named system. NAMED SYSTEft SUPPORT A new X'74' instruction provides a capability to save or to
load a named system that contains the control tables and control .odules
for the 3800 printer. The new BAftE3800 macro instruction allows named systems to be specified in the same manner as the NAMEICP macro instruction, except that the CPTYPE operand is not used. A new copy
file, NPRTBL copy, supports the NAftE3800 .acro instruction. USING THE 3800 PRIITER WITH STANDALONE UTILITIES OR WITH A V8/370 STARTER SYSTEM Release 6 supports the use of the 3800 printer with either standalone
utilities or with a V8/370 starter system. 1-8 IBft 'K/370 Release 6 Guide