6530 Programmer's Guide

6530 Programmer’s Guide 1-1
1
Overview
This chapter briefly describes the features of the 6530. This chapter also
provides descriptions of 6530 configuration parameters.
6530 Features
The 6530 provides the following features to enhance terminal operation
in online transaction processing environments:
A 25 row by 80 column screen format, with a message/status and
error line separate from the display of other screen data.
Two major operating modes: conversational and block.
Display memory for storage of displayable (graphics) data entered
from the keyboard or received from the host.
Video and data attributes for specifying how characters are
displayed on the screen and what type of characters can be entered
from the keyboard.
Support for both 7-bit and 8-bit character codes, including the
standard ASCII character set and international character sets.
6530-compatible keyboard operation, including local editing
capabilities, function keys to invoke application-specific functions,
and several levels of reset from the keyboard.
Configuration parameters for selecting options and setting up host
communications.
Screen Format The 6530 screen format consists of 25 rows by 80 columns. The cursor
type, which is selected by a configuration parameter, can appear as either
a blinking underscore or blinking reverse video block.
The first 24 rows of the screen display the characters written into display
memory. The bottom (25th) row is reserved and alternately displays two
types of lines: a message/status line and an error line. Both lines are
stored in an area of memory separate from the rest of the screen display.