So I was debugging a short program I'd written and I was having some weird problems. Working through it with a debugger showed me that CLR A and CLR ACC were not equivalent (which I did not expect).

I'm working with the AS31 compiler. Here's how the commands act in the simulator (the one from http://www.vaultbbs.com/sim8052/ )

CLR ACC    ;seems to clear only A.0 bit
CLR A      ;seems to clear all Acc bits
CLR B      ;seems to clear only B.0 bit
????       ;can I use CLR to clear all B bits or
           ;do I have to use mov B, #0

Can someone explain this to me? Because it just seems weird, and I didn't see any references in the tutorial or the 8052 instruction list pages.

Thanks!

-Sam