So an RX02 can be jumpered to work with the non-DMA RXV11; but the DMA RXV21 can't be configured to work with an RX01. Which of these two is a more interesting/useful thing to be able to do? People at MIT used to theorize the existence of a virulent biological virus, 'Honeywell Brain Damage'; I wonder if there's a DEC mutation? Those used to be fairly common on eBay for not many dineros; I only see one moderately expensive one at the moment, though. I'd definitely go this way, though - maybe Paul A has one available? Noel