iTS 1.0+)

Environment Division

Compaq NonStop™ Pathway/iTS SCREEN COBOL Reference Manual—426750-001

4-4

OBJECT-COMPUTER Paragraph

INTELLIGENT-2

specifies block mode. WRITEREAD I/O protocol: write to a device and wait

for a reply in block mode.

INTELLIGENT

specifies that the PATHCOM SET TERM TYPE parameter determines

conversational or block mode. If INTELLIGENT is specified but no

PATHCOM SET TERM TYPE parameter is specified, the default is

conversational mode.

The syntax for PATHCOM to enable these settings is given under the description of

the SET TERM command in the Compaq NonStop™ Pathway/iTS System

Management Manual.

Selecting INTELLIGENT-0 is appropriate if the device is to be placed in

conversational mode and the device is configured to communicate with a Compaq

access method for NonStop™ Himalaya systems, such as SNAX or X25AM. If

INTELLIGENT-0 is selected and the TCP executes a SEND MESSAGE statement

without a REPLY phrase, only a WRITE is issued to the device. If INTELLIGENT-

0 is selected and the TCP executes a SEND MESSAGE statement without data, a

WRITEREAD with a write count of 0 is issued.

Selecting INTELLIGENT-1 is appropriate if it is desired to have the device in block

mode and the device is configured to communicate with a Compaq access method

for NonStop™ Himalaya systems, such as SNAX or X25AM. If INTELLIGENT-1

is selected and the TCP executes a SEND MESSAGE statement without a REPLY

phrase, a READ is not issued. If INTELLIGENT-1 is selected and the TCP

executes a SEND MESSAGE statement without data, a WRITE is not issued.

Selecting INTELLIGENT-2 is appropriate if it is desired to have the device in block

mode and the device is configured such that other processes are simultaneously

requesting data from it. If this is the case, the WRITEREAD protocol guarantees

that each reply is returned to its intended requester. If INTELLIGENT-2 is selected

and the TCP executes a SEND MESSAGE statement without a REPLY phrase, a

WRITE is issued. If INTELLIGENT-2 is selected and the TCP executes a SEND

MESSAGE statement without data, a READ is issued.

When communicating with Guardian user processes, INTELLIGENT-0 or

INTELLIGENT-2 should be used in order to invoke a WRITEREAD call to

communicate with the process.

CHARACTER-SET IS

specifies a character set other than USASCII. This clause can be used only with

terminal types IBM-3270, T16-6530, and T16-6540. For other terminal types, the

USASCII character set is assumed. If specified, this clause must follow the

TERMINAL IS clause. The only language that can be declared for IBM 3270

terminals is KANJI-KATAKANA.

If this clause is omitted for a program running on an IBM 3270 or a 6540 terminal,

USASCII is used. If this clause is omitted for a program compiled for and running

on a 6530 terminal, USASCII is used until the first DISPLAY BASE statement is