Advanced Micro Devices reckons that it retains indefinite rights to manufacture the Intel parts it is already making, notably the 8086 and 80286 microprocessors, and is entitled to any updates to those parts unit 1991, but is very unhappy that Intel will not allow it to make the 80386 or the 8087 maths co-processor: Intel wants to terminate the pact as of April 1 1988 (CI No 661); IBM has rights to make the 80386 and is being regarded as the second source, although IBM does not currently sell any of its circuits on the merchant market.