I have finally had time to start bringing up my Northstar Horizon system. What I was hoping was that someone had the hex prom code or source for the Intel monitor in the MDS-800. In past time, I actually had ISIS-II running on a Northstar system and it requires a Intel style monitor program at 0f800H. Once I get access to my 8" disks again, I will be able to supply modified source that would allow someone else to do the same thing. best regards, Steve Thatcher