5160 motherboard slot restrictions?

I discovered tonight that the right-most ISA slot (the one closest to the power supply) in my newly-unearthed 5160 won't take the Silicon Valley Computer ADP50L IDE controller I'm playing with. It will take other (very short!) cards, but when I put the IDE controller into it, either the option ROM is invisible (ie. 55AA not found) or won't initialize for some reason, because I don't get functionality out of it (least of all, the boot "banner" produced by the card is missing). I can only conclude that: 1. The IDE board is slightly awry 2. The right-most ISA slot is slightly awry 3. There is some technical limitation I'm not aware of #1 and #2 are easy to accept, but not #3. Is there such a limitation? I remember that some of the very first PCI Pentium boards (circa 1994-1995) would only take PCI video cards in one particular PCI slot, so maybe that's where I'm pulling this from... -- Jim Leonard (trixter at oldskool.org) http://www.oldskool.org/ Help our electronic games project: http://www.mobygames.com/ Or check out some trippy MindCandy at http://www.mindcandydvd.com/ A child borne of the home computer wars: http://trixter.wordpress.com/