--- Sridhar the POWERful <vance(a)ikickass.org> wrote: You'd probably get bus timeouts. Does the DWBUA work in a VAX 7000? I know it became an issue in machines newer than the 8800. I do not recall where it falls off the trolley. The tech manual for the DWBUA describes its requirement for Unibus boards. I presume that *if* the DWBUA works as expected in the 7000 to begin with, *and* the Qniverter doesn't violate any of the requirements of the DWBUA, it would work, if the device driver didn't mind being stuffed into an 18-bit backplane vs 22-bit (and the mapping registers being different, etc., from Qbus to Unibus). Analyzing how an RL11 vs an RLV21 is set up by the VMS driver might be an interesting exercise to see how it might behave. I presume the register model between those two controllers is virtually the same; the difference would be the buses and the mapping registers. So presuming the hardware didn't glitch, you might be able to make it work if the software doesn't throw a rod (or if you can modify/replace the driver). -ethan __________________________________________________ Do You Yahoo!? Yahoo! Tax Center - online filing with TurboTax http://taxes.yahoo.com/