Dead Intel MDS controller board

Well, much to my dismay, but not too surprising, my last set of floppy diskette controller boards has failed and my Intel MDS is severely crippled. In my days of designing systems with Intel Microcomputer Development Systems I saw many of the floppy controller boards fail. That system had a two-board set of multibus cards in order to control up to four floppy diskettes. Seems kind of funny to call those huge 8" floppys "diskettes", but that's what they are. Anyway, of that two board set, I always have seen the same one fail. One card called the Channel Card which was based on Intel's 3000 series bipolar microprocessor never failed. It was always the other card, the Double Density Interface Board. When I "retired" all the MDSs where I worked, I kept three sets of those boards to keep my MDS going, fully expecting to have one or maybe even two go "bits up". Alas, last week, my third and last board set failed. And, yes, it was the interface card. The purpose of this post is to see if there might be someone on this list who would be able to advise me on a strategy for troubleshooting it (Tony Duell?) Better yet, but I'm not going to hold my breath on this one, would be someone who has an SBC-202 board-set he might be willing to part with, sell, trade, etc. Any ideas or leads would be appreciated. And, Tony, I might have a space ICE-80 manual for you. Will know next week. Thanks. Dave -- Dave Mabry dmabry(a)mich.com Dossin Museum Underwater Research Team NACD #2093