Hi all, I'm taking something I wrote in Parallax 's assembler, and now just starting to learn the Micro chip MPASM , I find something a bit confusing. 1. Port direction control 2. port reading/writing.. ie: every interface to the world.. The problem arises because Parallex in their manual states that this is the instruction.. MOV #literal !RA for example sets the direction for the register, but in the Micro chip version, they are using the TRST command that is, according to the Micor chip test, not to be supported in the future. Help.. Simple I/O/ guys/gals... an simple example program would be great. Anything on the web that is very explicit? I have all the ASM stuff from the microchip web page, and their handbook etc. Regards, from a frustrated newbie. Brad