DTACK is generated automatically by the GLU. So i dont need to worry about it. The backlit portable has no wait states. So the speed is literally as fast as the RAM access time. 

The non-backlit has wait states, I present the data available instantly, but the machine can only accept it within a certain amount of wait-states. 

Its hard to say why the chip was bad. I could have killed it for all i know. I dont have any ESD matting or anything. 

Also, do you have a link to any of those utilities?