Not all 8051 assemblers are equal:
2 months ago I fabed an s87c552-4-68 philips, layed it all out real good, man I had it going on, after board assembly, pulled out the Ye old
eprom emulator, wrote the code to toggle p4.0, download, nothing happing, even had the correct Derivative configured. Now after about a week
I switched over to my 8749 board, which uses a different assembler, and all works fine. So my bout went on for about 2 more weeks, finally, I got
on the net and downloaded 4 more different 8051 assemblers, and after switching to another my code really works great. At first I thought "man surly
I've not lost it that bad !", Well this just goes to show assemblers are not created equal.



P.S. I went back to the first assembler and output a intel hex file from it, and out a hex file from the one that works
and the files look to be a perfact match ":" and all ! org 000h