Ummmmm, there's nothing wrong with that chip. It was quite modern in its day. If the car is running well there would be no reason to change it.....
You can read the codes out by jumping the ALDL plug, or by swapping in a stock chip (or any chip with a standard data stream)
Do it like this:
Key off for at least 10 sec.
change chips to a stock style one
key on, do not start the car.
read the codes from the Scanmaster
key off for at least 10 seconds
swap the chip back.
Bob