Ok, so we banged the MSV11-P revision B/C memory issues into the ground (looks like the problem is burst mode DMA on Q Bus can cause random failures that corrupt disks) however does anyone know if the bug will affect the board if you use it as a normal Q bus memory board? In other words, if you put the board *below* an 11/73 or 11/83 so it reports as a non-PMI memory will it still have the same problem? I'd like to run my system with a full 4mb of memory, using my normal parity 2mb board and a 2mb MSV11-P board that was from an 11/83? Inquiring minds want to know :-) C