Bob Ammerman wrote: > On an 18F you could also say: CLRF WREG Hi Bob, Definitely true, but that would be architecture-specific (not portable across all PICmicro cores) just like 'CLRW' was in the original source code the original posted has. Using 'ANDLW 0x00' is architecture-independent (portable across various PICmicro cores) if you want the source code to compile on multiple PICmicro cores. Best regards, Ken Pergola -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu