6530 Programmer's Guide

Block Mode Operation
3-6
6530 Programmer’s Guide
Upshift
The upshift attribute, when set, causes the 6530 to convert all alphabetic
characters (letters a-z) entered from the keyboard to uppercase letters
before writing them into that field. This attribute affects only alphabetic
characters entered from the keyboard; it has no effect on characters sent
by your application. You must use the start field extended (Esc [)
sequence to set this attribute.
Alternate Input Device
By default, fields are defined to accept local input from the keyboard
only. Your application can define a field to accept input from an alternate
input device (AID). You must use the start field extended
(Esc [) sequence to set this attribute.
Control Codes and
Escape Sequences
Your application program can control 6530 operation by sending control
codes and escape sequences. A control code is represented by an ASCII
character in the range of 00 to 1FH. These control codes are not
displayed or stored in memory; instead, they invoke communications or
terminal control functions. The 6530 recognizes a subset of codes in the
control character range. See “Character Codes” on page 1-8 for details.
Escape sequences comprise a header, followed by a unique instruction
code, which may be followed by a required or optional parameter. Your
application program issues an escape sequence by sending the ASCII
code which represents the Esc character (1BH) followed by the ASCII
characters that represent the unique instruction code, followed by any
required or optional parameters. When the 6530 recognizes an escape
code, it performs the control function associated with that unique code.
When the 6530 receives an unrecognized escape code, it issues a
command error and aborts the sequence.