1. A method for implementing non-standard input/output (I/O) adapters in a standardized I/O architecture, the method comprising: receiving, at an I/O adapter, a request from a requester to perform an operation on one of the I/O adapters; determining that the request is in a format other than a format supported by an I/O bus; determining that the requester requires a completion response for the request; transforming the request into the format supported by the I/O bus; transmitting the request to the I/O adapter; receiving the completion response from the I/O adapter, the completion response comprising an indicator that the request has been completed, the completion response in the format supported by the I/O bus; and transmitting the completion response to the requester.