Hi there! An old project of mine is runnining on a 80C552/30MHz (KBA, is the psot fix, I think). This processor is obsolete, but I need the speed (I think). The software was written by somebody else and I can't ask him anymore, because he died two years ago. I thought, that I could use the Dallas DS87C550 as a replacement, but I guess, it will not be a drop-in replacement. Is anybody expericned with that kind of migration?
The 89C662 may also work (perhaps with blowing the 12 clock bit) Erik