Invoking the assembler on TSO

On TSO, you can use TSO commands, command lists (CLISTs), REXX EXECs, or ISPF to assemble your program. Figure 1 shows how to allocate the data sets and assemble the source program using the ALLOCATE and CALL commands. The commands are shown in bold text.

Figure 1. Assembling on TSO

READY
ALLOCATE FILE(SYSPRINT) DATASET(*) REUSE
READY
ALLOCATE FILE(SYSTERM) DATASET(*) REUSE
READY
ALLOCATE FILE(SYSLIN) DATASET(PROG.OBJ) NEW TRACKS SPACE(3,3)
    BLKSIZE(80) LRECL(80) RECFM(F B) CATALOG REUSE
READY
ALLOCATE FILE(SYSADATA) DATASET(PROG.ADATA) NEW CYLINDERS
    SPACE(1 1) BLKSIZE(32760) LRECL(32756) RECFM(V B)   
    REUSE CATALOG
READY
ALLOCATE FILE(SYSIN) DATASET(PROG.ASSEMBLE) SHR REUSE
READY
ALLOCATE FILE(ASMAOPT) DATASET(PROG.OPTIONS) SHR REUSE
READY
CALL *(ASMA90) ‘ADATA,LIST(133),OBJECT,TERM’
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Assembler listing and messages
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READY
FREE FILE(SYSADATA,SYSPRINT,SYSTERM,SYSLIN,SYSIN)
READY

You can enter ALLOCATE commands in any order; however, you must enter all of them before you start the assembly. Table 1 shows the data sets you must allocate when you specify particular assembler options.

Table 1. Assembler options and data sets required
Option Specified	Data Sets Required
Any	SYSUT1 and SYSIN
LIST	SYSPRINT
TERM	SYSTERM
OBJECT	SYSLIN
DECK	SYSPUNCH
ADATA	SYSADATA, WORKFILE, and SYSUT1

Exit Option: If you specify the EXIT option, the user exit program module must be in a partitioned data set that is in the standard search sequence, including the Link Pack Area (LPA).