You probably already found the description of XORLW so I guess you are asking about the (0x05 ^ 0x20)... This is an expression that can be evaluated at compile time, so the compiler will do that replacing it with the literal. The oparator ^ is an XOR actually, but you can find the explanation for that in the help. Tamas On Tue, Jan 6, 2009 at 8:50 PM, Harry H. Arends wrote: > LS, > > Could someone explain this construction to me. > I looked in the MPASM help file but cant find a description. > > xorlw (0x05 ^ 0x20) ; CV545 > > Regards > > Harry > > -- > http://www.piclist.com PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > -- Rudonix DoubleSaver http://www.rudonix.com -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist