Originally Posted by
peekay4
Probably not even that... the 486 didn't exist when the A320 entered service. Most A320s run 286s; some very early ones had 186s.
I don't know what kind of processor the pre-GPS B767 had, but the database memory was only 500 K. When TWA got ETOPS approval, they had to remove the low-altitude en route airways in the U.S. to make room for the essential airways in western Europe.
The design was set around 1979, so what was available then to crunch the numbers?
Today, some vendors are hitting limits with a 20 meg database in world-wide subscriptions.