6530 Programmer's Guide

Block Mode Operation
3-84
6530 Programmer’s Guide
proccode2 and proccode3 are ASCII characters in the range of
20H to 2FH whose ASCII codes offset by 1FH represent the nibble
values for the child process exit code. The most significant nibble is
represented by proccode2, and the least significant nibble is
represented by proccode3.
terminator comprises the control characters ETX (03H) and
LRC (Longitudinal Redundancy Check) in block mode.
See the programmer’s guide for your operating system for more
information.
Disconnect Modem (Esc f)
The Esc f sequence forces the Data Terminal Ready line (CD) into a low
state for three seconds. This causes most modems to disconnect and to
terminate the connection.
General Operations This group of control codes and escape sequences performs a variety of
terminal functions.
Bell (BEL)
The BEL control character (07H) causes the 6530 to sound an audible
alarm. It is typically used to alert the user of some action, such as an
error.
Define Field Attribute (FS)
The FS (1CH) character indicates the start of a 4-character sequence that
assigns a set of attributes by allowing an application to select an element
from either the Fixed Field Definitions table or the Variable Field
Definitions table. (SeeTable 3-9, “Fixed Field Definitions Table -
Assigned by EM3270,” on page 86 and Table 3-10, “Variable Field
Definitions Table - Default Values,” on page 89.) The format of the
sequence is as follows:
FS p1 p2 p3
where:
FS starts the sequence.
p1 specifies the screen row number, from 1 - 24 (20h - 37h), at
which the redefined video attributes begin. The format is the same
as that of the Set Buffer Address sequence (DC1).