EM3270 Manual

Tandem EM3270 Manual—110332 E-1

Color-Mapping and Function-Key

Mapping

This appendix describes the EM3270 emulator PC6530 (PCT) color support and

provides three user-replaceable procedures that control color mapping for 3270 base and

extended color support.

It also summarizes the function-key mapping operations that take place when the

emulator is running and describes the procedures for replacing the standard set of

function-key mappings with a customized set.

PCT Color Mapping

If you are using PCT version C20 or later, these procedures are not needed. They are

maintained to provide compatibility with previous releases of EM3270.

Use the CONFIG utility program provided with the PCT product to modify the

configuration file PCT.INI. Include COLOR_MAPPING_ON in the PCT.INI file and the

EM3270 emulator automatically maps the IBM colors to the terminal colors. Refer to

the PCT6530 User's Guide for specific directions.

The EM3270 emulator provides support for 3270 color attributes to work with PCT. The

following color mapping facility is provided for anyone not using a current version of

PCT, version C20 or greater. To enable this support, use the SET command specifying:

SET DEVICE COLOR ON

With COLOR set to ON, extended highlighting attributes are ignored by the EM3270

emulator. Refer to Section 4, “EM3270 Emulator Command Set,” for a complete

explanation of the SET command.

The EM3270 emulator provides three user-replaceable procedures that control color

mapping for base and extended color support. These procedures associate specific video

settings with the corresponding 3270 base and extended attribute values. They are listed

in the “Color-Support Mapping” sections later in this appendix.

IBM 3270 Color Support

The IBM 3270 color terminals support two types of color control by application

programs. The first is base color mapping and provides four colors for programs that use

the Start Field Order (SF) to create fields. Since SF has no provision for color

specification, the colors are assigned as follows:

Note. You can also use the EM3270 emulator color feature with conventional Tandem

terminals to provide reverse and underline video for existing IBM host applications.