Accessing

 

Printer Devices

 

 

 

The

total

lines

with

an F

coded

in position

18

can

fetch

the overfl

only

do so if overflow is sensed

prior to

the printing of one of t

fetch overflow is processed, a check is made to determine whether

indicator is on. If it is on, the

overflow routine is fetched, the

tioned by the overflow indicator is

printed,

and

the

total

operation

Changing Forms Control

Information in

 

a

Program-Described

File

 

 

 

 

 

 

 

 

 

The

PRTCTL

(printer

control)

keyword

allows

you

 

to

change

forms

control

tion and to access the current line

value within the program for a

described PRINTER file. Specify the

keyworddata

 

structurePRTCTL( )

nameon

the

File

Description

specification

for

the

PRINTER

file.

 

 

 

You

can

specify

two

types

of

PRTCTL

data structures in your source:

OPM-defined data structure, or an ILE

data

structure.

The

default i

data structure layout which is shown

in Table 24. To use the OPM-def

structure layout, specifydataPRTCTL(-structure

:*COMPAT)name . The OPM

 

 

 

PRTCTL

data structure

layout is

shown

in

Table 25

on

page 324.

 

The ILE PRTCTL data structure must be defined on the Definition spec requires a minimum of 15 bytes and must contain at least the followin fields specified in the following order:

Table

24. Layout of ILE PRTCTL Data Structure

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Positions

 

Subfield Contents

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1-3

 

A three-position character

field

that

contains

the

space-be

 

 

value

(valid

values:

blank

or

0-255)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4-6

 

A three-position character

field

that

contains

the

space-af

 

 

value

(valid

values:

blank

or

0-255)

 

 

 

 

 

 

 

 

 

 

 

 

 

7-9

 

A three-position character

field that contains the skip-bef

 

 

(valid

values:

blank

or

0-255)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

10-12

 

A three-position character

field that contains the skip-afte

 

 

(valid

values:

blank

or

0-255)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

13-15

 

A three-digit numeric field with

zero decimal

positions tha

 

 

tains the current line count

value.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

The OPM

PRTCTL data structure

must

be

defined

on

the

Definition

speci

and must contain at least the following

five subfields

specified

in

order:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Chapter 17. Accessing Externally Attached323 Devices

Page 346 Page 348
Page 347
Image 347
IBM AS/400 manual Changing Forms Control, File, OPM Prtctl data structure
Page 346 Page 348

AS/400 specifications

The IBM AS/400, now known as the IBM iSeries, is a midrange computer system that has been a cornerstone of enterprise computing since its introduction in 1988. Designed to provide a robust platform for business applications, the AS/400 is celebrated for its reliability, scalability, and integrated database capabilities.

One of the key features of the AS/400 is its Integrated Operating Environment, which blends hardware and software resources seamlessly. This integration allows businesses to execute diverse workloads, ranging from traditional applications to modern web-based services, all on a single platform. The operating system, OS/400 (now IBM i), offers a rich set of APIs and tools for developers, simplifying application development and management.

Another standout characteristic of the AS/400 is its built-in database, DB2 for i. This powerful relational database management system allows for efficient data handling and provides advanced features such as support for SQL, XML, and JSON, making it easier for businesses to manage their data and integrate it with other systems. The database's tight integration with the operating system enables high performance and security.

In terms of scalability, the AS/400 can accommodate small businesses as well as large enterprises, with the ability to support hundreds of users simultaneously. Its architecture allows for easy upgrades in hardware, meaning that organizations can scale their systems without replacing the entire infrastructure.

Security is another critical attribute of the AS/400. With a sophisticated security model, it offers built-in user authentication, access control, encryption, and auditing capabilities to protect data and applications from unauthorized access.

The AS/400 also supports multiple programming languages, including RPG, COBOL, Java, and PHP, giving organizations the flexibility to choose the development tools that best fit their needs. This diversity helps maintain legacy applications while also developing new ones that leverage modern technologies.

Moreover, the platform supports both traditional green-screen interfaces and modern graphical user interfaces, allowing organizations to transition smoothly into contemporary user experience paradigms.

Overall, the IBM AS/400 stands out as a resilient, flexible, and secure computing platform that enables organizations to effectively manage their business operations, streamline processes, and adapt to changing market demands. Its unique combination of integrated features and capabilities ensures that it remains relevant in today's fast-paced technology landscape.
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