A multiport SRAM has an array of cells, a first port, and a second port. An IO subsystem A for an open system and an IO subsystem B for a mainframe are connected by a communication unit. The exhaust purifying apparatus further includes an NOx adsorbent material for adsorbing NOx in the exhaust. Gear stages and shift elements selectively engage to change gears in the partial transmissions The hollow shaft couples stage to a solid shaft of the countershaft assembly which has hollow shaft that can couple the solid shaft via shifting element and can couple, via stage.