Hi Jim, What a coincidence -- we just got a lengthy email from Wayne Farmer in the ibm1130.org guestbook, who also talked about working with the that same Meta IV (production serial #1 in fact), at UC San Diego, and he described working with these very microcode ROMs. Hey, are you planning on coming to the Vintage Computer Festival in Mountain View, CA in November? If you are it would be great if you could bring this microcode board with you to show off at the IBM 1130 party which will be held Saturday evening during the VCF. Brian