1. A bus apparatus for interconnecting a plurality of nodes comprising: a first plurality of bus lines coupled to said nodes; a second plurality of bus lines coupled to said nodes; each of said nodes including; transceiver means for both transmitting onto and receiving from said first bus lines, first signals representative of data and said second bus lines, second signals representative of status; delay means for delay readying of untransmitted ones of said data signals until it has transmitted signals responsive to received ones of said data signals; priority storage means for storing signals representative of said nodes priority for access to said first and second bus lines, each of said nodes having a unique priority number stored in said priority storage means; adapter circuit means for coupling at least one of said nodes with an input/output bus, said adapter circuit means includes: a. an adapter buffer memory; b. selector means for selectively coupling said buffer memory to said input/output bus on said bus lines; c. a buffer state memory for storing signals representative of the state of said buffer memory; d. hunting means for examining the contents of said buffer state memory to identify locations in said buffer memory which are able to receive data from said input/output bus and from said first and second bus lines; e. addressing means coupled to said hunting means and said buffer memory for addressing locations in said buffer memory identified by said hunting means; interface circuit means for coupling between at least one of said nodes and said bus lines, said interface circuit means includes: a. an interface buffer memory for providing temporary storage of data being transferred between said one node and said bus lines, said buffer memory including a plurality of sections each of which is dedicated to receive data from a certain one of said nodes and to transmit data to a certain one of said nodes; arbitration means coupled to said first and second lines, said transceiver means and said storage means, said arbitration means includes: a. means for sending said priority number on said first lines when said node is ready to transmit said data signals; b. means for sending said priority number on said second lines when said node is ready to transmit said status signals; c. means for receiving priority numbers from said first and second lines from said nodes and comparing them with said node's priority number; d. means for causing said node to transmit said data or status signals on said first and second lines if said node has the highest priority and has sent its priority number on one of said first and second lines; e. means for updating said priority number by lowering said priority number if said node has transmitted data signals; whereby separate fair accessing said nodes to said first and second lines is maintained.