Thank you. Finally something that makes the author's intentions clear. (rant) But, an unqualified "All previously existing format-RSE and format-RXE instructions are changed - - - " should be read as written.
The reader should not need to read into the paragraph what is not there. The words "All previously existing" are incorrect. There are more RXE instructions described in other chapters not affected. Also neither chapter 7 nor anything in chapter 7 changed "All previously existing format-RSE and format-RXE instructions - - -". That would be even more senseless. "All" should be qualified and "existing" removed. Something like: "Instructions described in chapter 7 that were previously format-RSE and format-RXE instructions are changed - - -". or "Instructions that were previously described as format-RSE and format-RXE in chapter 7 are changed - - -". There is a difference between "All in existence" and a "few in a chapter". (/rant)
