gtpd2m1j | Data Communications Services Reference |
This section describes the process and procedures necessary to (a) create, load, utilize, and maintain the online Terminal Map Record files, and (b) generate symbolic reference modules (DSECTS) in user assembled programs. In addition, the terminal inputs required to utilize paging and scrolling, and their resultant responses, are detailed. The information set forth includes input preparation, system error and message interpretation, general process flow, input messages and associated responses, and the job control language (JCL) necessary to invoke the offline phases of processing.
The process of creating and defining map formats results in the
generation of symbolic reference modules (DSECTs) in user assembled
programs and the initialization and maintenance of the physical
online map records used by the Input/Output Mapping Program. The
following steps outline the entire process involved in order to obtain the
final results.
The Mapping Support macro instructions are used in application development to declare a data structure used in processing terminal displays. DPANL and DDATA macro instructions (called map statements) written by an application programmer must be placed onto a Map Source Statement Library with an MVS utility program. Map statements are then included in ECB controlled source code through the use of the assembly language COPY instruction. The copied map statements have the effect of declaring symbolic names used in a display data structure, since the DPANL and DDATA instructions expand into a DSECT included in the source code. The DSECT is adjusted and a register is assigned as the result of parameters included in the map statement coding.
The effect of using map statements is analogous to the use of a data macro instruction. However, map statements do not appear in the source code of ECB controlled programs. This means that source code does not contain the register assignment of the DSECT generated as the result of copied map statements.
A map statement on the Map Source Library is used in two different ways:
This macro, which consists of parameterized keywords coded by the user, provides the capability for the user to specify, for each format or panel, a unique map name and sequence number, a related terminal type, 3270 command and control information, and DSECT size. There are two of these statements for each user written map.
This macro statement, which is coded by the user, defines the symbolic name, length, characteristics, and position of each field in a user designated report or display. The inclusion of the field name provides the user symbolic addressability to a specific area of a DSECT. There is a single DDATA statement for each field appearing in a user desired report or display.
This record is constructed offline by ASLOL. The data that is contained in each record is obtained from the keyword parameters of the DPANL and DDATA macro source statements previously written by the user. After the MSP Records have been constructed and written to the MRT File, they are loaded by the online ASL program for use by the Input/Output Mapping Program to format data streams. There is one physical Terminal Map Record created for each terminal type specified on the DPANL macro statement of a specifically named and numbered map.
There are two (2) DPANL statements required for each user defined map. The first precedes and the latter follows the DDATA field definitions.
The following examples of DPANL statements and their associated MVS Assembler generated parameters are provided as representative samples of this macro. Note that a map definition consists of DPANL and DDATA statements; only examples of the former are shown at this point.
|...+....1....+....2....+....3....+....4....+....5....+....6....+....7... MAP1 DPANL DSECT=START, X MODE=IN, X SEQNO=75, X MAXFLDS=10 +MAP1I DSECT +MAP1IHDR DS 0CL16 MESSAGE BLOCK HEADER +MAP1IBID DS CL2 RECORD ID +MAP1ICHK DS CL1 RECORD CHECK +MAP1ICTL DS CL1 RECORD CONTROL FIELD +MAP1IPGM DS CL4 MODIFYING PROGRAM FIELD +MAP1IFCH DS CL4 FORWARD CHAIN ADDRESS +MAP1ILIT DS CL4 LINE IA TA & CPUID +MAP1IMF DS CL2 INPUT FIELD BIT INDICATORS --- --- --- --- DPANL DSECT=END,REG=R1 + USING MAP1I,R1 + IS CSECT +#MAP1I EQU 75 MAP SEQUENCE NUMBER
|...+....1....+....2....+....3....+....4....+....5....+....6....+....7... MAP2 DPANL DSECT=START, X MODE=OUT, X SEQNO=128, X DEV=(3277-1,3286-1), X OMSGBLK=128, X CMD=W +MAP2O DSECT +MAP2OHDR DS 0CL16 MESSAGE BLOCK HEADER +MAP2OBID DS CL2 RECORD ID +MAP2OCHK DS CL1 RECORD CHECK +MAP2OCTL DS CL1 RECORD CONTROL FIELD +MAP2OPGM DS CL4 MODIFYING PROGRAM FIELD +MAP2OFCH DS CL4 FORWARD CHAIN ADDRESS +MAP2OLIT DS CL4 LINE IA TA & CPUID --- --- --- DPANL DSECT=END,REG=R4 + USING MAP2O,R4 + IS CSECT +#MAP2O EQU 128 MAP SEQUENCE NUMBER
|...+....1....+....2....+....3....+....4....+....5....+....6....+....7... MAP3 DPANL DSECT=START,MODE=BOTH,SEQNO=(3,4),MAXFLDS=17 DDATA DPANL DSECT=END,REG=R4 +MAP3I DSECT MSG BLOCK DSECT +MAP3IHDR DS 0CL16 MSG BLOCK HEADER +MAP3IBID DS CL2 RECORD ID +MAP3ICHK DS CL1 RCD CHECK +MAP3ICTL DS CL1 RCD CONTROL FIELD +MAP3IPGM DS CL4 MODIFY PGM FIELD +MAP3IFCH DS CL4 FWD CHAIN FIELD +MAP3ILIT DS CL4 LINE IA TA & CPU ID +MAP3IMF DS CL3 MODIFY FIELDS INDICATORS DS GENERATED BY DDATA - REFERENCE DDATA MACROS + USING MAP3I,R4 + IS + CSECT +#MAP3I EQU 3 MAP SEQUENCE NUMBER --- --- --- --- --- +MAP3O DSECT MSG BLOCK DSECT +MAP3OHDR DS 0CL16 MSG BLOCK HEADER +MAP3OBID DS CL2 RECORD ID +MAP3OCHK DS CL1 RCD CHECK +MAP3OCTL DS CL1 RCD CONTROL FIELD +MAP3OPGM DS CL4 MODIFY PGM FIELD +MAP3OFCH DS CL4 FWD CHAIN FIELD +MAP3OLIT DS CL4 LINE IA TA & CPU ID +MAP3ORES DS CL3 NOT USED DS GENERATED BY DDATA - REFERENCE DDATA MACRO USING MAP3O,R4 + IS CSECT +#MAP30 EQU 4 MAP SEQUENCE NUMBER
There is a variable number of DDATA statements for each user defined map. Generally, there is one (1) DDATA statement for each field the user desires to define for input or output data streams. For a detailed description of the various keywords and parameters to be declared by using the DDATA macro, see TPF General Macros.
The following examples of DDATA statement and their associated MVS assembler generated parameters are provided as representative examples of this macro.
|...+....1....+....2....+....3....+....4....+....5....+....6....+....7... ABCD DDATA POS=(1,1),LENGTH=10,REPEAT=4 (input map) ABCD0L DS H DATA FIELD INPUT LENGTH ABCD0I DS CL10 INPUT DATA ABCD1L DS H ABCD1I DS CL10 ABCD2L DS H ABCD2I DS CL10 ABCD3L DS H ABCD3I DS CL10
|...+....1....+....2....+....3....+....4....+....5....+....6....+....7... XYZ DDATA POS=(5,10),LENGTH=3,REPEAT=2 (output map) DS 0H XZY0A DS CL1 ATTRIBUTE BYTE DS CL1 RESERVED XYZ0O DS CL3 OUTPUT DATA DS 0H XYZ1A DS CL1 ATTRIBUTE BYTE DS CL1 RESERVED XYZ1O DS CL3 OUTPUT DATA
In this case, the first field will be positioned at row 5, column 10 of a display/print; the second field (XYZ1A + XYZ1O) will be at row 6, column 10.
The MNOTE messages produced by the DPANL and DDATA macros are self- explanatory. The severity code associated with each MNOTE message indicates whether corrective action is necessary or not. A severity code of 2 indicates that a default value is assigned to an omitted keyword parameter. A severity code of 4 indicates a condition which must be corrected. A severity code of 0 is an information message.
The following section details the JCL requirements, hardware, card input, and messages associated with the offline portion of the Mapping Support. This phase of the package provides the user with the means of creating and replacing entire Terminal Map Record (MSP) files, and of adding, deleting, and replacing individual MSP records residing in a file.
System hardware requirements for the execution of the offline version of the Map File Load/Create program are as follows.
Device | #REQ | Device Name | Purpose |
---|---|---|---|
CARD READER | 1 |
OS/READER SYSIN | Read JCL to initiate program ASLOL. Sort program/print program. |
PRINTER | 1 |
OS/PRINTER SYSPRINT/SYSUT2 | Print JCL error messages/ utility messages. |
Name given printer device by program ASLOL to log program error messages. | |||
DISKS | 1 (min) | MAPD/MAPS | Names given users Map Source Library. |
SORTWK01,02,03 | Disk workspace for Sort program. | ||
TAPE | 1 | MAPTAPE | Name given MRT tape to be created by program ASLOL. |
SORTIN/SORTOUT | Same MRT tape created by ASLOL but used as input/output to Sort program. | ||
SYSUT1 | Same MRT tape created by ASLOL and sorted by Sort. Now used as input to Print/ Punch utility. |
Hardware requirements for the modify phase are the same as the Create run, with the following exception. The card reader will be used by the ASLOL program as an input device with the logical name Card needed in the JCL run (see JCL Examples).
//CREATE JOB //JOBLIB DD DSN=P8740SM1.VSM1.PTF0037.SORTLIB,DISP=SHR //MAPINIT EXEC PGM=IEHINITT (INITIALIZE MRT TAPE) //SYSPRINT DD SYSOUT=A //LABEL DD UNIT=(TAPE,,DEFER) //SYSIN DD * LABEL INITT SER=111111 /*
//MAPGEN EXEC PGM=ASLOL,PARM='CREATE,PRINT',TIME=5 (MRT CREATE) //STEPLIB DD DSN=USER LINK LIBRARY,DISP=(SHR,PASS) (ASSUMED CATALOGED) //PRINT DD SYSOUT=A,DCB=(RECFM=FB,BLKSIZE=3630,LRECL=121) //MAPD DD DSN=USER MAP LIBRARY,DISP=SHR (ASSUMED CATALOGED) //MAPS DD DSN=USER MAP LIBRARY,DISP=SHR (ASSUMED CATALOGED) //MAPTAPE DD DCB=(BLKSIZE=1055,LRECL=1055,RECFM=FB),DSN=MAPRCDS, // UNIT=(TAPE,,DEFER),VOL=SER=111111,DISP=(OLD,PASS), // LABEL=(,SL) //SYSUDUMP DD SYSOUT=A //PRINT2 DD SYSOUT=A,DCB=(RECFM=FBA,BLKSIZE=3630,LRECL=121) //SYSOUT DD SYSOUT=A //SORTLIB DD DSN=SYS1.SORTLIB,DISP=SHR //STORE DD DSN=&&PRTDATA,DCB=BLKSIZE=18,LRECL=18,RECFM=FB), // UNIT=SYSDA,SPACE=(TRK,(20),,CONTIG),DISP=(NEW,DELETE) //SORTIN DD DSN=&&PRTDATA,DISP=(,PASS),VOL=REF=*.STORE //SORTOUT DD DSN=&&PRTDATA,DISP=(OLD,DELETE),VOL=REF=*.STORE //SORTWK01 DD UNIT=SYSDA,SPACE=(TRK,(20),,CONTIG) //SORTWK02 DD UNIT=SYSDA,SPACE=(TRK,(20),,CONTIG) //SORTWK03 DD UNIT=SYSDA,SPACE=(TRK,(20),,CONTIG) //CARD DD * /* //SORT EXEC SORTD (MRT SORT) //SORT.SORTIN DD DSN=MAPRCDS,UNIT=(TAPE,,DEFER),VOL=SER=111111, // DCB=(LRECL=1055,BLKSIZE=1055,RECFM=FB), // LABEL=(,SL),DISP=OLD //SORT.SORTOUT DD UNIT=AFF=SORTIN,DSN=MAPRCDS,VOL=SER=111111, // DCB=(LRECL=1055,BLKSIZE=1055,RECFM=FB),LABEL=(,SL), // DISP=(NEW,PASS) //SORT.SORTWK01 DD UNIT=SYSDA,SPACE=(TRK,(20),,CONTIG), // VOL=REF=*.MAPGEN.SORTWK01 //SORT.SORTWK02 DD UNIT=SYSDA,SPACE=(TRK,(20),,CONTIG), VOL=REF=*.MAPGEN.SORTWK02 //SORT.SORTWK03 DD UNIT=SYSDA,SPACE=(TRK,(20),,CONTIG), VOL=REF=*.MAPGEN.SORTWK03 //SORT.SYSIN DD * SORT FIELDS=(23,1,CH,A,13,2,BI,A,5,4,CH,A,9,2,BI,A),SIZE=E120 END /* //PRINT EXEC PGM=IEBPTPCH (PRINT FINAL SORTED MRT) //SYSUT1 DD DCB=(BLKSIZE=1055,LRECL=1055,RECFM=FB),DSN=MAPRCDS, // UNIT=(TAPE,,DEFER),VOL=SER=111111,DISP=(OLD,KEEP), // LABEL=(,SL) //SYSPRINT DD SYSOUT=A //SYSUT2 DD SYSOUT=A //SYSIN DD * PRINT TOTCONV=XE /* //
//MODIFY JOB //JOBLIB DD DSN=P8740SM1.V3M1.PTF0037.SORTLIB,DISP=SHR //MAPINIT EXEC PGM=IEHINITT (INITIALIZE MRT MOD TAPE) //SYSPRINT DD SYSOUT=A //LABEL DD UNIT=(TAPE,,DEFER) //SYSIN DD * LABEL INITT SER=111111 /*
//MAPGEN EXEC PGM=ASLOL,PARM='MODIFY,PRINT',TIME=8 //STEPLIB DD DSN=USER LINK LIBRARY,DISP=(SHR,PASS) (ASSUMED CATALOGED) //PRINT DD SYSOUT=A,DCB=(RECFM=FB,BLKSIZE=3630,LRECL=121) //MAPD DD DSN=USER MAP LIBRARY,DISP=SHR (ASSUMED CATALOGED) //MAPS DD DSN=USER MAP LIBRARY,DISP=SHR (ASSUMED CATALOGED) //MAPTAPE DD DCB=BLKSIZE=1055,LRECL=1055,RECFM=FB),DSN=MAPRCDS, // UNIT=(TAPE,,DEFER),VOL=SER=111111,DISP=(OLD,PASS), // LABEL=(,SL) //SYSUDUMP DD SYSOUT=A //PRINT2 DD SYSOUT=A,DCB=(RECFM=FBA,BLKSIZE=3630,LRECL=121) //SYSOUT DD SYSOUT=A //SORTLIB DD DSN=SYS1.SORTLIB,DISP=SHR //STORE DD DSN=&&PRTDATA,DCB=(BLKSIZE=18,LRECL=18,RECFM=FB), // UNIT=SYSDA,SPACE=TRK,(20),,CONTIG),DISP=(NEW,DELETE) //SORTIN DD DSN=&&PRTDATA,DISP=SHR,VOL=REF=*.STORE //SORTOUT DD DSN=&&PRTDATA,DISP=(OLD,DELETE),VOL=REF=*.STORE //SORTWK01 DD UNIT=SYSDA,SPACE=(TRK,(20),,CONTIG) //SORTWK02 DD UNIT=SYSDA,SPACE=(TRK,(20),,CONTIG) //SORTWK03 DD UNIT=SYSDA,SPACE=(TRK,(20),,CONTIG) //CARD DD * D 299 B DELETE MAP WITH SEQ NO. OF 299 FOR DEV TYPE B D 2300 BF DELETE MAP WITH SEQ NO. OF 2300 FOR DEV TYPE B & F D 3000 BF DELETE MAP WITH SEQ NO. OF 3000 FOR DEV TYPE B & F D 2800 ABC DELETE MAP WITH SEQ NO. OF 2800 FOR DEV TYPE A, B & C A AAAA ADD MAP NAMED AAAA A MAP ADD MAP NAMED MAP A LARG ADD MAP NAMED LARG A RCDS ADD MAP NAMED RCDS R TKT1 REPLACE MAP NAMED TKT1 R PAGE REPLACE MAP NAMED PAGE R LARG REPLACE MAP NAMED LARG R ZZZZ REPLACE MAP NAMED ZZZZ /* //PRINT EXEC PGM=IEBPTPCH (PRINT MRT MOD TAPE) //SYSUT1 DD DCB=(BLKSIZE=1055,RECFM=FB),DSN=MAPRCDS, // UNIT=(TAPE,,DEFER),VOL=SER=111111,DISP=(NEW,KEEP), // LABEL=(,SL) //SYSPRINT DD SYSOUT=A //SYSUT2 DD SYSOUT=A //SYSIN DD * PRINT TOTCONV=XE /* //
For the Map File Create program, the input requirements for a Create run are as follows:
The input requirements for the modify run of the Map File Load/Create run are as follows:
|...+....1....+....2....+....3....+....4....+....5....+....6....+....7... D Map Device Type Code Seq. #
|...+....1....+....2....+....3....+....4....+....5....+....6....+....7... R Map Name
|...+....1....+....2....+....3....+....4....+....5....+....6....+....7... A Map Name
Delete a map for Device Type A (3277-1) with sequence number 123.
|...+....1....+....2....+....3....+....4....+....5....+....6....+....7... D 123 A
Delete a map for Device Types A and B (3277-1 and 3277-2) with sequence number 156.
|...+....1....+....2....+....3....+....4....+....5....+....6....+....7... D 156 A B
Modify the existing map named Map1 with the version now on the Map Source Library.
|...+....1....+....2....+....3....+....4....+....5....+....6....+....7... R MAP1
Add to the existing map file the map named MAP2 now in the Map Source Library.
|...+....1....+....2....+....3....+....4....+....5....+....6....+....7... A MAP2
All error and communication messages issued by the offline generic mapping support program are full length descriptive messages and should provide the user with information about what action to take in order to correct the problem. Should the user have difficulty understanding the messages and what action, if any, to take, see Messages (System Error and Offline) and Messages (Online).
To format (map) input and output data streams, the user written application program segment must request activation of the Input/Output Mapping Program. This is accomplished by means of an ENTER type macro to members ASFO/ASFI for RCB associated devices or to ASFP/ASFJ for devices not associated with an RCB. In addition, the user passes information in a variable length work area and the unformatted data stream to the mapping function. A more detailed explanation of these points follows.
This phase of processing reformats native mode data streams emanating from the IBM 3270 Information Display terminal. The native mode data, includes device dependent control characters (buffer address and buffer order characters) interspersed among the entered text. Input mapping deletes from the data stream the device dependent control characters inserted by the 3270 control unit and places the agent/operator entered text in specific areas of blocks of main storage; these areas coincide with a previously defined symbolic reference module (DSECT). In addition, a series of bit indicators, one for each possible input field, is used by the input mapping function to summarize, to the user application, the contents of each respective input field. When text is entered for a field, the corresponding bit is set on.
These bit indicators are stored in the field suffixed by IMF in the user DSECT.
The reformatted block is then returned to the user via the BACKC macro or passed to a user determined destination via the ROUTC macro.
The user written application program segment entry requirements to input mapping are summarized as follows:
It is the user application's responsibility to determine if the device has an associated RCB. If the device has an associated RCB, the user application codes an ENTRC ASFI to regain control or codes ENTNC ASFI if not. If the device does not have an associated RCB, the user application codes an ENTRC ASFJ to regain control or codes an ENTNC ASFJ if no return is desired.
Bytes 0-1 | Contain the map sequence number in binary representation. |
Byte 2 | For return, must be set to a X'00'. On return from ASF, contains X'00' for nonerror condition or binary value for error condition. |
Bytes 3-5 | Reserved for use by Mapping Support Package.
|
Bytes 0-1 | Contain the map sequence number in binary representation. |
Byte 2 | For no return, must be set to a X'80'. |
Bytes 3-5 | Reserved for use by the Mapping Support Package. |
Bytes 6-17 | This represents the Routing Control Parameter List (RC0PL) that is used to route messages. |
Bytes 6-9 | Contain the message destination, either a terminal address and processor ID or a symbolic application name. |
Bytes 10-13 | Contain the symbolic application name origin of this message. |
Bytes 14-17 | Contain control information - Reference RC0PL.
|
An example of code necessary to invoke the input formatting function may consist of the following:
BEGIN -- -- -- -- LA R1,#MAP1I MAP SEQUENCE NUMBER STH R1,EBW000 STORE IN WORK AREA MVI EBW002,X'00' INDICATE RETURN LA R1,EBW000 ADDR OF WORK AREA ENTRC ASFI CLI 2(R1),X'00' ERROR RETURN BNE ERROR YES L R2,CE1CR0 USER DSECT TM MAP1IMF,X'40' SECOND INPUT FIELD CONTAIN DATA BO TAG1 YES TM MAP1IMF,X'01' EIGHTH INPUT FIELD CONTAIN DATA BZ TAG2 NO -- -- -- -- -- FINIS
This phase formats for display on 3270 CRTs and for printing on hard copy terminals output messages which have been constructed by the user application program. For 3270 type terminals, whether CRT or printer, output mapping reformats the user created data stream, which consists solely of text, and constructs an output message containing device dependent control characters. These control characters consist of 3270 commands, orders, and attributes. The user created text is resident in a block(s) of storage which coincides with a program member assembled symbolic reference module (DSECT).
For non-3270 type devices supported by output mapping, data fields are placed in their defined positions by using blanks (X'40') as fill characters or, for those devices equipped with a mechanical tab feature (for example, 1980 Model 24), tab control characters (X'05'). When fields are placed on new lines, carriage control characters (X'15') are inserted into the output data stream. The positioned data is obtained from the user program generated DSECT.
After the output data has been mapped, the blocks are either returned to the user via the execution of a BACKC macro, or the data is routed to a terminal/application via the ROUTC macro.
The user written application program segment entry requirements to output mapping are summarized as follows:
Examples:
For LNIATA: Bytes 12-15 520302C1
For RID: Bytes 12-15 001006C1
The purpose of the following sample code is to provide an example of how the entry requirements to output mapping (ASFO) may be accomplished:
BEGIN --- --- --- --- GETCC D0,L2 OBTAIN 1055 BYTE BLOCK L R2,CE1CR0 LOAD BASE ADDRESS MVI MAP2OBID,X'00' INITIALIZE BLOCK MVC MAP2OBID+1(256),MAP2OBID MVC MAP2OBID+256(256),MAP2OBID MVC MAP2OBID+512(256),MAP2OBID MVC MAP2OBID+768(256),MAP2OBID MVC MAP2OBID+1024(26),MAP2OBID MVC MAP2OLIT(4),LITC LNIATA & CPUID --- --- --- --- --- XC EBW000(18),EBW000 LA R1,#MAP2O MAP SEQUENCE NBR STH R1,EBW000 STORE IN WORK AREA MVI EBW002,X'80' INDICATE NO RETURN MVC EBW006(12),PRCPL MOVE RCPL TO WORK AREA LA R1,EBW000 ENTNC ASFO OUTPUT MAPPING --- --- --- --- --- LITC DC XL4'030802C1' LNIATA & CPUID PRCPL DC XL12'Reference Routing Control Parameter List RC0PL' FINIS
Mapping activates the Page/Scroll program (03-ASC) when more than one screen is needed to complete a display. The Page/Scroll program, in turn, creates a Multiple Screen Control Record (AS5MB) for this entry. This allows the program to control each display, based on user input and information contained in the AS5MB record.
The user, at map creation time, can specify the type of display that best fits his needs. For information, see Terminal Panel Display Macro (DPANL). If SCREEN=SPLIT was specified at map create time, the Page/Scroll program can interpret input for the upper portion of the screen, the lower portion or both. This allows the user to page or scroll the upper half or lower half of the screen independently of each other. If SCREEN=FULL was specified or the default taken, the Page/Scroll program accepts input only from the last line of the screen and pages or scrolls the entire display.
The following pages provide examples of messages required to invoke the page/scroll function. The page and scroll entries are shown with their respective responses.
DEN TUL 08/04/74 CLASS FARE AIRLINES A 88.80 AA AC AD AE AF AG BA BC BD BE BF BJ T 44.07 AB AC BE F 88.80 AB AC AE AT AJ AK BB BC BE Y 44.07 AA AC AD AE AF AH BA BH Z 44.07 AA AC AD AE AF AH BA BC BD BE BF BH Agent Request: PD2 Where: PD2 = Page forward 2 pages.
DAL F 88.80 AA-AC AD-AE AF-AH BA-BC BD-BE BF-BH ELP T 88.80 AA-AB AC-AD AE-AF BA-AB CA-BC A 44.07 AB-AC CA-CD EF-AB BB-BC Agent Request: MU3 Where: MU3 = Move display forward three lines.
BB BA BC BD BE BF CLASS FARE AIRLINE PAIRS DAL F 88.80 AA-AC AD-AE AF-AH BB-BC BD-BE BF-BH CA-CC CD-CE CF-CH ELP T 88.80 AA-AB AC-AD AE-AF BA-AB CA-BC A 44.07 AB-AC CA-CD EF-AB BB-BC Agent Request: PT Where: PT = Redisplay page 1.
DEN TUL 08/04/74 CLASS FARE AIRLINES A 88.80 AA AC AD AE AF AG BA BC BD BE BF BJ T 44.07 AB AC AE F 88.80 AB AC AE AI AJ AK BB BC BE Y 44.07 AA AC AD AE AF AH BA BH Z 44.07 AA AC AD AE AF AH BA BC BD BE BF BH Agent Request: PD12B Where: PD12B = Incorrect page request.
DEN TUL 08/04/74 CLASS FARE AIRLINES A 88.80 AA AC AD AE AF AG BA BC BD BE BF BJ T 44.07 AB AC AE F 88.80 AB AC AE AI AJ AK BB BC BE Y 44.07 AA AC AD AE AF AH BA BH Z 44.07 AA AC AD AE AF AH BA BC BD BE BF BH INVALID FORMAT
DEN TUL 08/04/74 CLASS FARE AIRLINES A 88.80 AA AC AD AE AF AG BA BC BD BE BF BJ T 44.07 AB AC AE PB F 88.80 AB AC AE AI AJ AK BB BC BE Y 44.07 AA AC AD AE AF AH BA BH Z 44.07 AA AC AD AE AF AH Agent Request: PD2 Where: PB = Page to last page. PD2 = Page down 2 pages.
AA-AC AB-AD AF-AE BB-BC Y 44.07 AB-AC DAL F 88.80 AA-AC AD-AE AF-AH BA-BC BD-BE BF-BH MU3 CA-CC CD-CE CF-CH ELP T 88.80 AA-AB AC-AD AE-AF BA-AB CA-BC A 44.07 AB-AC CA-CD EF-AB BB-BC Agent Request: PU2 Where: MU3 = Display 3 lines more from top. PU2 = Page up 2 pages.
HNL F 88.80 AA-AB AC-AB AD-AC BC-BD M 44.07 CA-CC CB-CD CE-CF AA-AC AB-AD AF-AE BB-BC > F 88.80 AB AC AE AI AJ AK BB BC BE Y 44.07 AA AC AD AE AF AH BA BH Z 44.07 AA AC AD AE AF AH > Where: > indicates where user is to input page/scroll request (First character of page/scroll request overlays > character)