(IBM Mainframe Discussion List) wrote:
In a message dated 11/14/2007 7:45:09 A.M. Central Standard Time,
[EMAIL PROTECTED] writes:
My thinking,
right or wrong was that if they used the lowest bit to do the signaling,
they would have lost addressability to less.
That's exactly what they have done! 64-bit pointer-defined linkage
(e.g., BASSM to 64-bit mode routine) is specified by turning on bit 63
of the target address register. In this case, bit 32 (the bit that
signals 31-bit pointer-defined linkage) is treated simply as part of the
64-bit target address.
--
Edward E Jaffe
Phoenix Software International, Inc
5200 W Century Blvd, Suite 800
Los Angeles, CA 90045
310-338-0400 x318
[EMAIL PROTECTED]
http://www.phoenixsoftware.com/
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