6530 Programmer's Guide

6530 Programmer’s Guide 2-1
2
Conversational Mode Operation
Conversational mode is useful for applications that need to interact with
the 6530 on a line-by-line basis. The 6530 transmits data to the host one
character at a time as it is typed on the keyboard. The transfer is
terminated by a line termination character typically, a CR (0DH).
The 6530 interprets incoming data as either graphic (displayable)
characters or control (non-displayable) characters and processes them
accordingly. When the 6530 is configured for half-duplex, the 6530
processes characters entered on the keyboard as it transmits them to the
host. When the 6530 is configured for full-duplex, the 6530 processes
only characters received from the host; characters entered on the
keyboard are not processed until they are echoed back by the host.
Display memory in conversational mode is organized as one continuous
roll. Only 24 lines can appear on the screen at one time. Character input
from either the host or the keyboard takes place at the current cursor
location on the screen. After each character input, the cursor advances
one position. Control codes, escape sequences, and keyboard operations
are available to move the cursor on the screen, to roll display memory,
and to perform other terminal operations.
This chapter provides detailed descriptions of control codes and escape
sequences, function keys and other keyboard operations available in
conversational mode.