Hi, If anyone (1) bored, (2) interested in CADR architecture and (3) familiar with ldb and dpb, would you mind reading "A. I. memo 528" page 7,8 & 9 http://www.unlambda.com/lispm/memo528.pdf and then talking with me about how the ldb and dpb parts of the byte instruction should work? I think I get it but I have a head cold and I'm not completely sure. Another set of eyes would help. -brad