obviously aviation isn't your forte...  

here must fly toy helicopters to think an adc can't display altitude on a mfd.

my guess is all you have is a steam gauge single encoding altimeter in that vfr only p.o.s. you fly.

Leave the convo to the big boys flying 92's and the guru who just finished up a recert on everything, and go crawl back into your robbie there ranger boy.

You'll never be a real pilot if you can't grasp a simple concept of an adc sending alt data to the mfd, transponder, fms, tcas, fcc's, fadec's and egpws over arinc bus.

do you even know what half of all those systems are?