I am reading the book "The 8086 / 8088 Primer Second Edition" by Stephen P Morse. In it on page 54, it says
The 8086 provides instructions to facilitate the task of sign extension. These instructions were initially named
SEX(sign extend) but were later renamed to [...]
CBW(convert byte to word), and
CWD(convert word to double word).
What Intel chip provided the primitive
SEX (as documented) and what was the last chip produced before Intel underwent the
SEX change documenting the new