Olin wrote: > I meant a *whole* module I could assemble and reproduce the symptom with. Fine, sorry... Actualy, my code as posted, together with a "hint" you gave in a former post, solved it. It was a conflict beween this line : ; defram gbankadr ; and this two lines : udata_shr w_save res 1 ;saved W during interrupt, mapped to all banks I moved the w_save definition after the defram, like this : defram gbankadr w_save res 1 ;saved W during interrupt, mapped to all banks ; ; defram 0 and commented out the udata_shr line... I have compared this with the original /pic/qqq_intr.aspic file, and as far as I can see, the same problem is there. Search for "defram gbankadr" and "udata_shr". Jan-Erik. -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body