On Sat, Jun 20, 2015 at 10:58 AM, tony duell <[email protected]> wrote: >> I am looking for any information on a National Semiconductor RAM board that >> I think goes in >> a VAX 11/730.
> Pressing the > button turns off the yellow LED and completely disables the board. Quite why > you'd want to do this I do > not know... The reason you'd want a button to disable the board is when running diagnostics, you can "remove all the non-DEC memory" without physically removing it. Of course it still could be the source of a problem, but at least operational memory boards can be "deleted" so they don't grossly affect the diagnostic code. It's a "feature" to allow customers to buy less-expensive RAM and still have a way to pass diagnostics without fingerpointing from DEC about that "other" board in there. -ethan
