The image I found on bitsavers is decus-5-9.bad. It has a problem where one of the data words on the 0600 page is missing either it's high or low half. The file decus-5-9.err "fixes" this by adding a "044" before "007", forming a call to the floating point package, and aligning the data thereafter to look like instructions. The result still has a sizeable checksum error, so there are still additional errors. Fortunately, I was able to obtain another copy from eBay, which does not report a checksum error, and have added that as decus-5,8-9.bn. I have retained the stuff from bitsavers, since it appears to be rather different from the eBay version. The file foo.{pal,lst,bin} is a disassembly of decus-5,8-9.bn. Vince