From: Neil Cherry <ncherry(a)home.net> seems more MVII is a Q-bus machine and like it's compatable Q-bus PDP-11s that went before and during its a reasonably easy bus to interface to and DEC did a fair job of makeing the documentation for it easy to get. Designing a PIO SCSI card would be easy, DMA a bit harder but there is no secrets there either. Programming is another thing though as the Q-bus is an annex of the processor address space and DMA between memory (on private(PMI) bus) and QBUS devices is more complex programming. However RQDX (disks), DEQNA/DELQA (NIC) do the dma trick so that is already known. Allison