I really can't believe it, decades we are searching and now? One bomb after another...
With this post I suggest bob1200xl to be Atari user of the year, too!!!
Here is why:
http://atariage.com/forums/topic/217770-action-source-code/page-2
post #31
Did you all really got the point what Bob actually did for us?
I can't believe it:
BASICXL102.zip
As he has written: This is(!) the source code for OSS Basic XL 1.02 on 2 DOS II Version 2.0D disks without any DOS. That me
The book is wrong. The command should be MOVE $0570,$C4,-4 to install the extension. Looking at the BXL listing, the FMOVER and EXPMOVE routines are strange. I suspect that whoever implemented the MOVE command didn't realize that the requirements for those two routines are very specific and the code in the XMOVE cartridge routine doesn't set the stage properly.
It should be possible to disassemble the BXE extension file and rip out the routines that BXL is missing and add them to the BXL ext