Russ Hanson wrote: > > I know that set 3,(iy+$05) sets white text on black and res > 3,(iy+$05) returns it to normal. I also know of res 1,(iy+$0D) but have > no idea what this one does. Please explain what this command does and > list other res and set and explain them. thank you > Russ Hanson set and res are commands that change the flags on the calc. flags are internal settings that control how the calc operates