------------------------------<snip>--------------------------------
OK. The current standard is a single FW (with the high bit set) pointing at a HW with length followed by 0-100 bytes of data (the FW being pointed to by R1).

Make the new method a 2 FW Parm list with FW 1 pointing at the old 100 character PARM and FW 2 (which is End of Parmlist flagged) pointing at the new Long Parm. The only GOTHCHA with an old style program is if it gets paranoid and actually checked the end-of-parmlist flag on the single FW it expects to be passed to it.

BTW: There are a number of IBM utilities that ALREADY check the length of their Parmlist since they support being launched by JCL with a PARM and being CALLED with a real muli-parm parmlist (the 2nd and subsequent parms often being DDN overrides).
-----------------------------------<unsnip>--------------------------------
What's to stop older programs from interpreting the second FW as a pointer to a DDNAME list?

Rick

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