It has come to my attention that the current version of Keil's A51 assembler now handles bit memory addressing the same way everyone else's 8051 assembler does. (I *rarely* use Windoze, so was not aware of this until recently.) The -k command line option was added long ago to deal with the old DOS based Keil A51.

Do NOT use the -k option if you intend to re-assemble with the Windoze Keil A51.

I've checked this with Keil's A51 version 7.10, but have no idea what version of A51 made the change.

If you find any other problems with D52 relating to Keil (or anything else for that matter), please contact me at the email address listed at the beginning of every source file.

Jeff