Where is the computer on a 1989 camaro rs v-6?

There's no "computer" in the sense of a single, easily identifiable box like in modern cars on a 1989 Camaro RS V6. The engine control unit (ECU), also called a Powertrain Control Module (PCM) in some GM literature of that era, is integrated into the car's wiring harness and is usually located somewhere under the dash or in the console area. It's not a readily accessible component; you'd have to do some digging to find it. Precise location varies slightly depending on the specific options and trim levels. A service manual would be the best resource for pinpointing it.