In a message dated 3/20/2006 6:38:02 A.M. Central Standard Time, [EMAIL PROTECTED] writes:
Just guessing: doesn't the LA of DOGETS set the high-order bit? >Thus, the adressing mode will not be set to 24-bit... LA does never set the high order bit. It always clears all high order bits not being used in the current addressing mode (only in the low half of the 64 general purpose register, to be precise). A purist might disagree and say that LA sets the high order bit to zero. Remember the mainest rule of thumb: when in doubt, read (or re-read) the Principles of Operation description. E.g.: "In the 31-bit addressing mode, the address is placed in bit positions 33-63, bit 32 is set to zero, and bits 0-31 remain unchanged." Bill Fairchild Plainfield, IL Gens nefaria Bushorum delenda est. ---------------------------------------------------------------------- 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
