Hello Bernd. I'm far from an expert in the subject, but I'm in the middle of reading Programming Boot Sector Games, by Oscar Toledo. In this book, Mr. Toledo explains on page 49 about CS XLAT (no mention about AL in the code, but the text makes it clear it uses AL) precisely what you mention in your first email, but says it works with the 8088. This information can be trusted, IMHO, since he later uses PUSHA and POPA and makes it clear that it will require a 80186.
Hope this helps. Sadly, I only have access to 486s and up. Daniel
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