It wasn't in the PoP - it was in the back of the Functional Characteristics manual for the 360/67. There was a note that addresses in the upper half of a 32-bit address space might appear negative because of the sign bit causing address comparisons to be reversed.
In 32-bit mode, LA loaded 32 bits. I had a word with Gene Amdahl about it once - he said the word 'algebraic' in the BXLE/BXH definition was the biggest mistake in the /360 design and the ultimate reason XA was only 31-bit. -- Phil Payne http://www.isham-research.co.uk +44 7833 654 800 ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
