10.02_devices/2_src/rx211.cpp
// RXV21 has is QBUS + DMA
RXV21 has is QBUS + DMA
RXV21 has is QBUS + DMA
RXV21_c::RXV21_c(): RX211_c() {
    is_RXV21 = true ;
    type_name.value = "RXV12";
    set_default_bus_params(0777170, 16, 0264, 4);
}
RXV21_c :: RXV21_c ( ) : RX211_c ( ) { is_RXV21 = true ; type_name . value = " " ; set_default_bus_params ( 0777170 , 16 , 0264 , 4 ) ; }
RXV21 has is QBUS + DMA
RXV21 has is QBUS + DMA
// INTR level 4 instead of RX11s 5