diagnostics on a '91?

Has anyone been succesful at getting diagnostics info to a computer from a '91 camry? I know that before '96 there was no OBD-2 so i dont have the standard OBD connection. If you know of any obd to usb or serial adapters for 3SFE motor let me know.
 
Thanks in advance

i think the diag connector is on the passenger side of the engine compartment near the strut support..jumper wire Te1 to E1 ..turn ignition on and start counting the check engine light flash..i'm going to guess code 25 or 26..