In pouring over the documentation for the 13304A (FAB), I find one thing unclear. Is there a way to disable a given block? Empirically, it seems that if you have roms in a given block they are going to get mapped SOMEWHERE, depending on the jumpers and if you don't have roms in a given block you don't have to worry about setting jumpers to disable that block. But I was curious if there was a given jumper combination for a block to disable it - without having to pull the roms. Not a huge deal, just curious, and I don't see it in the docs. Any thoughts? Best, J