6530 Programmer's Guide

Conversational Mode Operation
2-30
6530 Programmer’s Guide
Read Terminal Configuration (Esc ?)
The Esc ? sequence causes the 6530 to transmit the current values for the
terminal configuration parameters to the host. The message returned has
the following general format:
SOH ! code value [ code value ] ... CR
where:
SOH is a control character (01H) that acts as a start of header for
messages returned to the host.
The exclamation point (!) identifies this message as a configuration
message.
code is an ASCII character that uniquely identifies a configuration
parameter. (See Table 2-4 on page 2-25.) For example, the code A
specifies the cursor type.
value is a decimal number that specifies a value for the preceding
configuration parameter. (See Table 2-4 on page 2-25.) For
example, a 1 value for the cursor type specifies a blinking
underscore.
CR is a control character (0DH) that terminates the message.
A code/value pair is returned for each configuration item. The code/value
pair equals three bytes unless the value is 100 or greater. In that case, the
code/value pair equals four bytes. When the value is less than two digits,
a space character (20H) is returned between the code and value. For
example:
A1 is returned when the cursor type is set to underscore/blinking.
H15 is returned when the baud rate is set to 19200.
Set Terminal Configuration (Esc v)
The Esc v sequence sets new values for the terminal configuration
parameters. The Esc v code is followed by a set of code/value pairs (as
shown in Table 2-4 on page 2-25) and terminated by a CR character
(0DH). You can set new values for any subset of the configuration
parameters. For example, the following escape sequence sets values for
the cursor type and the bell column:
Esc v A0 B72 CR
If a value is outside the allowable range for the parameter, the new
setting is ignored.