It depends on the size of the shield, naturally. Don't forget the modifiers for flanking or attacking from the rear!Not what I meant. How many attacks against a shield-wielding target got to use the shield bonus? Or Dex bonus, depending on the direction of the attack? At least those were pretty much all gone in 3e.
It's possible the DM shielded you from incorporating some of those on your own, but they sure did clutter up the AD&D combat head space.