dexrow

The book is dos... dos is ended.. (or the end from a german jeskola buzz site I may have the spelling wrong memory and all)..
There is music software in this book.. on page 82 we go from

9.1
to
9.1.1 (data registers)..

hex can be represented by 24h ( h for hex ) or with the $ symbol.. this creates all kinds of fun for search engines.. fl is mentioned.. (Fruty loops could be a reference to the letters but they stand for flag registers. The book has alot of music stuff in it. )..

some odd statements ...

using mov...

mov1.dem (move one democrat???)
speakerto.dem

I haven't even had that much time to look through this.. copyright is 1989 - 1993 or 1990 - 1993
My thoughts are you would look for work that uses this as a source..