3800 Image Library DPMSIZE=n is the maximum size of the delayed queue for the 3800 printer device.
Hardware Supported
As a VM/370 real spooling device, the following hardware features of the 3ROO are supported: • Automatic 10aa1ng of character
modifications
arrangement tables and graphic • Full support of the additional storage character generation feature • Forms overlay feature (flashing) • Copy modifications
The use of multiple character arrangement tables for printing use
within one spool file (TRC support) is D21 supported. Related Publications The Q! l1H1 lftOO PrintilliI manual, Order No.
GC20-1775 is intended as a first reader for those users of printers who
wish to take a quick look at the non-impact IBM 3800 Printing Subsystem,
at its basic concepts and at how these concepts lead to new functions
tha t may offer different options in planning and operations.
The i2!: lhe IBM 1800 Order No.
GA26-1635 provides information on the functions and features of the IBM 3800 Printing Subsystem relating to channel commands, sense bytes, and
error detection, recovery, and recording. Specific information and
examples are given of copy modification and control and graphic
character modification.
The 1.§00 Order No.
GC26-3846 provides planning and conversion information for the IBM 3800 printing Subsystem and information on how to use the 3800. Creating and Updating a 3800 Named System A named system must be established (via the NAME3800 macro) in DMKSNT for each system data set capable of image library activation. The
purpose of the named system is to contain the 3800 character arrangement
tables, copy modifications, graphic modifications, and FCBs. They can
then be referenced by name and the data for them obtained from this
named system when the file referencing them is about to print on a 3800. The active named system for a particular 3800 is in its RDEVBLOK and can
be changed by the START command. See the NAME3800 macro description in "Part 2. Defining Your VM/370 System_" Programs exist to enable you to dynamically change the character
arrangement tables, graphic modifications, copy modifications, and FCBs
available. With these programs (GENIMAGE and IMAGELIB), and the named
system support discussed above the installation can make these changes
dynamically, without a VM/370 system load. GENIMAGE and IMAGELIB are
described in detail in the 70 IBM VM/370 Planning and System Generation Guide

3850 3850 Mass Storage System
Generating a VM/370 System that Supports a 3850 The 3850 Mass storage System supplies large amounts of data online under-system coritrol.- Up to ·47 2 billion bytes of data space becomes
available, allowing the user to place significant amounts of tape and
DASD shelf data under direct control of the system. Up to four virtual
machines concurrently running OS/VS1, MVS, or SVS operating systems with support can each control an interface to a common 3850 Storage
System. HARDWARE SUPPORTED Support for the 3850 is available on the following processors supported
by VM/370: system/370 145, 145-3, 148, 155II, 158 (attached
processor and uniprocessor mode), 16511, the 168 (attached processor and
uniprocessor mode), the 3031 (attached processor and uniprocessor), 3032 and 3033 processors and the 4331 and 4341 processors.
The major hardware components of MSS are as follows: • The 3851 Mass Storage Facility (MSF) • The 3830 Model 3 Storage Control for System/370 145, 145-3, 148, 15511, 158, 16511, and 168 or the Integrated Storage Control for
the System/370 158 and 168 • The 3333 Disk Storage and Control (Models 1 or 11) • 3330 Disk storage Drives 1, 2, or 11) • 3350 Disk storage Drives (Real Only) The Storage Control (ftSC) is a microprogrammed processor that
provides the operational control for the components of the Storage
System. It is physically housed in the 3851 Mass Storage Facility. The MSC may have four System/370 channel interface positions, referred to as
A, B, C, and D. A host system attaches to one of these through a
control unit position of either the byte multiplexer channel or block
multiplexer channel operating in burst mode. The channel interface
is used for transfer of orders, commands, control information, and
status messages between the host system and the It does not carry
user application data. Up to four operating systems containing MSS support (OS/VS1, SVS, or may be connected to the Mse. These operating systems may be
running in a virtual machine under VM/370, or in a real processor,
connected to the same MSC as VM/370. One of the four MSC interfaces is
dedicated to each virtual machine. Each virtual machine using an MSC port reduces by one the number of other real processors that may be
connected to the Mass Storage System. Part 1. Planning for System Generation 71