Sigh. As long as it's possible to "get there from here", I don't much mind how an instruction set's laid out. I'll learn it and learn to work around the problem areas, such as the lack of an inclusive-OR instruction on the CP1600, or the weird setup of the RCA COSMAC, or the asymnetry of <fill in the blank>'s instruction set, or the lack of a hardware stack on a PDP/8. If you want strange and asymnetric, try working with a few samples of the current crop of microcontrollers. You can get used to anything. In a way, this line of discussion reminds me of an Inuit criticizing the Tongan language for the lack in the vocabulary for different types of snow. You work with what you've got. Cheers, Chuck