>I need to know the dataset names of the files that are allocated (DD stmts) of 
>a STC.
>Can some one point me to the initial CB, I looked at TCB , do I assume this is 
>the >place to start ? 

Start with the PSA at absolute address zero (IHAPSA).  Field PSATOLD contains 
the address of the current TCB (IKJTCB).  Field TCBTIO contains the address of 
the Task Input Output Table (TIOT - mapped by IEFTIOT1).  The TIOT is an array 
containing one or more entries for each DDNAME (field TIOEDDNM).  Within the 
TIOT entry, field TIOEJFCB contains a three byte address of the Job File 
Control Block (JFCB).  The JFCB contains the DSNAME.

I will send separately a little ASM subprog that does this and a bit more.

John

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