bms1

BASIC MAPPING SUPPORT

Collection of assembler language macros

Macro An instruction which generates additional code when passed through an assembler program.

An interface between the terminal control and application programs.


Format Independence

The ability to send data to a device without having to be concerned with the format in which the data will be displayed

Device Independence

The ability of an application program being written in such a way that it does not depend on the physical characteristics of the devices.


CREATION OF MAPS

MAP Representation of one screen format

MAPSET One or a group of maps With a name up to 7 characters registered in the PPT

FIELDS Group of one or more characters

There are two type of Fields

1. Constant fields or Literal fields 2. Variable fields or Data Fields

BMS - Map definition Macros

DFHMSD - Defines a Mapset

DFHMDI - Defines a map in a mapset

DFHMDF - Defines a field in a map

The BMS macro is run through an assembler program to produce two maps.

Physical Map & Symbolic Map



MAP GENERATION

Symbolic MapPhysical Map

Design Screen

Code Map

Assembler

-Load Library- Contains Literals

- Copy Library- Contains data Fields


EXPLANATION OF TERMS IN SYNTAX

TYPE =MAP :Creates a physical map =DSECT :Creates a Symbolic map =&SYSPARM : both PM & SM =FINAL :Indicates the end of map set coding

LANG - Specifies the ProgrammIng language

(ASM,COBOL,PL/I or RPG) =COBOL is usually coded.


MODE - Indicates the input/output operation IN :For the input map OUT :For the output map INOUT :For the input/output map;

Used for maps involving both input/output.

TERM - Specifies the type of terminal that can be used with the map .

=3270 is preferred.


CTRL - Specifies a list of control options in

effect for each map in the map set,like:

FREEKB Free keyboard after each output ALARM Sound audio alarm during output FRSET Field Reset

STORAGE - Acquires a separate symbolic map area for each map in the map set.

= AUTO


TIOAPFX -Generates a 12 byte filler at the beginning of the symbolic map for control characters.

= YES


DFHMDI Macro parameter

SIZE=(lines,columns), LINE=line-number , COLUMN=Column-number,

CTRL=(control-option...)

BASIC MAPPING SUPPORT EXPLANATION OF TERMS IN SYNTAX

SIZE - Specifies the size of the map in lines and columns. =(24,80) is usually coded for a 24*80 screen

LINE - Specifies the starting line number. = 1 is usually coded.

COLUMN - Specifies the starting column number

= 1 is usually coded. CTRL - Same as CTRL option for DFHMSD macro.


DFHMDF Macro parameter

POS=(LINE,COLUMN), INITIAL=' LITERAL' LENGTH=FIELD-LENGTH, ATTRB=(BRT|NORM|DRK,

PROT|ASKIP|UNPROT, NUM, IC, FSET), PICIN = ' PICTURE - STRING ' PICOUT =' PICTURE-STRING '

Field Attributes

Field Intensity: NORM / BRT / DRK

Field protection attribute :

PROT / UNPROT / ASKIP

Field Characteristic : NUM

Initial Cursor Positioning : IC

Field Modification Indication : FSET


The Symbolic map contains: Each data field with FIVE(5) suffixed Suffixed I, O, A, L, F

The mapname suffixed with I & O (both present if MODE=INOUT is coded) For example mapname is ADDM (DFHMDI) ADDMI for input group & ADDMO for out group

I - Data entered by the terminal operator and received into the program.

O - Used to hold the output field for operations requiring the send of a map.


A - one-byte field that contains the attribute byte used during output procedures to override the attribute field defined in the BMS map.

L - A half word binary field that contains the length of data entered by the terminal operator.

F - one-byte flag field Contains 0 or 1 it indicate where the data field is modified or not

bms1

Education