> -----Original Message-----
> From: IBM Mainframe Discussion List On Behalf Of Rick Fochtman
>
> -----------------------<snip>-----------------------
>
> >The "bar" is the "hole" in z/OS between 2G and 4G for all address
> >spaces, as you said. The origin of this thread was the
> desire for a CSA
> >in the "above the bar" area, similar to the CSA "below the line" and
> >the CSA "above the line". I termed the phrase GCSA for this
> area (G for
> >the
> >64 bit Grande instructions ).
> >
> >
> -----------------------<unsnip>---------------------
> Huh? I was told that "The Bar" was the top of the 31-bit
> addressable space. What did I miss?
The "bar" is actually 2GiB wide, beginning at 64-bit address
x'00000000_80000000' and ending at 64-bit address x'00000000_FFFFFFFF'.
In the context of this thread, the "bar" and the "hole" are one and the
same.
-jc-
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