On Aug 8, 2012, at 01:04, Alan Altmark wrote:
>
> First pointer: We welcome your CMS questions over on IBMVM! ;-)
>
> Sorry I haven't been watching IBM-MAIN as closely as I should, but the "TTR"
> isn't. It's the CMS file system record number of the record that was just
> read (shifted left 8 bits) i.e. rrrrrr00. At OPEN, no records have been
> read, so the record number is zero. You NOTEd the zero value and added 1.
> Then you POINTed to 0x000001, but that low-order byte isn't used, so you are
> effectively pointing to record zero. ...
>
IIRC, there's an OS convention that setting the lowest byte
("Z") of the TTRZ to '01'x causes reading of the block following
thenone POINTed to by the TTR. Does CMS respect this?
-- gil
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