Computer ECU to PC Link?(MKIII)

Is there anyway I can get my MKIII ECU to connect to a laptop (via serial or other) to adjust the settings? Is there a piggy back ECU or something else out there that is compatible with a 1988 Supra?

If so, what all does it control? Boost? Airflow? Fuel? Spark? Or do i need to obtain seperate computers for all those options?

Thanks for you help guys!

Greddy E-manage has been used by a few people, has pretty much every feature the AEM standalone does IIRC. I've got the software for it on my comp and it seems fairly easy to use.

What exactly are some of the features? I will look it up when I get home. Thanks for the tip! Do you need any other controllers such as boost/fuel-air/ignition? I want to replace these systems because I have access to a laptop.

Do you have specific website I can visit?

Thanks for the reply!