> -----Original Message-----
> From: IBM Mainframe Discussion List On Behalf Of Edward E. Jaffe
>
> Steve Comstock wrote:
>
> > Will the new instructions, and modifications to existing
> instructions,
> > introduced with the z9 series be retrofitted to the earlier z800,
> > z890, z900 and / or z990 series?
>
>
> No. But you can use STFLE to determine which facilities are
> present. The presence of STFLE is indicated by bit 7 of the
> output from STFL in the PSA.
But STFL is a privileged instruction (STFLE is not). Who issues the
original STFL? the operating system during IPL?
-jc-
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