Thanks Mike and John. That answers my questions.

Jim McAlpine

On 5/25/05, McKown, John <[EMAIL PROTECTED]> wrote:
> > -----Original Message-----
> > From: IBM Mainframe Discussion List
> > [mailto:[EMAIL PROTECTED] On Behalf Of Jim McAlpine
> > Sent: Wednesday, May 25, 2005 8:56 AM
> > To: [email protected]
> > Subject: unicode on z/OS
> >
> >
> > We are running z/OS 1.2 and DB2 V7 and are looking at implementing
> > unicode.  Looking in the POO, there are 3 levels of hardware
> > instructions associated with unicode called z/Architecture Extended
> > Translation Facility,  z/Architecture
> > Extended Translation Facility 2 and z/Architecture Extended
> > Translation Facility 3.
> >
> > The POO says that if neither of the first 2 levels are implemented in
> > the hardware, then z/OS will simulate those instructions.  However it
> > doesn't say what happens if the first 2 levels are implemented in your
> > hardware but the 3 level isn't.  Can someone confirm that those
> > instructions associated with the 3rd level will be simulated by z/OS
> > if they are not there.
> >
> > The reason for asking is that we have a Flex-ES machine and it
> > apparently implements the first 2 levels, but not the 3rd.
> >
> > Jim McAlpine
> 
> Jim,
> 
> Since nobody else answered your question about instructions, I thought
> that I'd give you this reference. It is all that I can find.
> 
> http://publibz.boulder.ibm.com/cgi-bin/bookmgr_OS390/BOOKS/E0Z2A141/3.1
> 
> Basically, to me, it states that Unicode services will run on any
> processor which will run z/OS. Unicode Services will use the hardware
> instructions if they exist. So I would guess that the subroutines check
> the bits in the IHAPSAE (PSA Extention) to determine if the hardware
> instructions exist on the processor. If so, it uses them, otherwise it
> uses other instructions.
> 
> 
> --
> John McKown
> Senior Systems Programmer
> UICI Insurance Center
> Information Technology
> 
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