operation simDhs or Dhs
gtos_start_operation: enter
gtos_start_operation: forward to hardware
write_to_hardware: out simDhs -> stoh_start_operation $opnames
gtos_start_operation: exit
gtos_start_operation: enter
gtos_start_operation: forward to hardware
write_to_hardware: out simDhs -> stoh_start_operation $opnames
gtos_start_operation: exit