Abstract: A transfer type selector selects a transfer type used for maintaining cache coherency according to address values used for accessing memory and is programmable so that different transfer types can be selected for different applications. In one embodiment, a table has different address ranges each having associated transfer types. Transfer type selection logic selects one of the transfer types associated with the address range containing the address in a memory transaction request.

Abstract: A method and apparatus for auto-detection of ISDN BRI services available for use by terminal equipment is disclosed. This auto-detection provides a variety of simulated call activity stimuli to the ISDN switch peered with the terminal equipment, thus exercising secondary ISDN features such as call conferencing, call forward, call transfer, and X.25/D channel data transfer capability in a manner that can be detected by the terminal equipment. For instance, the call conferencing feature can be detected by having the terminal equipment place a call to it's own directory number using one B-channel, answering the call on the other B-channel, and then attempting to add a third party to this call. By evaluating the messages returned from the switch during the attempted third party addition, the auto-detection process can determine whether the call conferencing feature is available.