On Thu, 4 Apr 2019 15:03:43 +0000, Gene Hudders <eshudd...@aol.com> wrote:

> I'm sorry, but I don't have to make any changes
> to my 31 bit programs using CALLs and using
> 64-bit addressing. We have lots of programs
> doing both AM31 and AM64 with the only change
> is the instructions to change the addressing mode.

If you are changing addressing mode to
31-bit, so that you can cope with the
x'80' bit in a CALL, then you would need
to do the same thing with an AM32
program.

> Do you realize how many user programs that
> have CALLs embedded in the code that would
> require eliminating the HO X'80' bit?

A problem that exists when trying to
convert to pure AM64 too.

BFN. Paul.

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