I was able to "wake" the cpu up putting the car in zmodem mode by
Holding rst and udl at the same time then Letting go of rst then udl and the stat light will blink the morse code equivelent of z. using hyper terminal you set the baude rate to 38400, parity none , 8 bit , 1 stop bit .my problem was using usb to serial connection instead of straight serial to serial . So maybe this will help someone in the future cause it took a lot of calls to get this info since I found nothing in any tac 20 manual about this precedure
