9370 SPD I/O Bus Extension Features
Original Publication Date: 1989-Jun-01
Included in the Prior Art Database: 2005-Jan-28
Extending the 9370 SPD I/O Bus into I/O Expansion Modules for the purpose of attaching more I/O devices to be contained within the processor is accomplished by a Bus Extension Unit (BEU) which extends the functions of the BEU into the I/0 Expansion Module. The BEU consists of a pair of logic cards interconnected by a cable. The card in the pair nearer the Bus Control Unit (BCU) is referred to as the primary BEU card and the other card as the secondary BEU card, as shown in Fig. 1.