Diabolo,
I just revisited this site to see any developments and saw from your profile that you operate B777 (I hadn't checked that before). For heaven's sake don't use the DAS suggestion that I made, it belongs to 'low and slow'. If you want more info, I and many others would be happy to comply, but in the meantime just read the TAS directly from the top of your B777 PFD.
Oh what a wonderful day in so many ways if "they" could standardise on EAS as primary airspeed indications for aircraft, for this and countless other scenarios.