Hi Richard,

I also had same problem.
The assembler details:
Version 4.02a 8051 Macro Assembler
1985. one executable software file.

I have written some programs for 8052, it produced the same error and then i checked the list. It assembled the correct sfr address even though it was not available in 8051.

I just ignored the Error after confirmation from list file and linked it.

No problem with my software.

You can live with sfr non-existant error!!!!

If you require x8051.exe and link.exe of i am using, can send you through mail.

V.Nagarajan.