PB bus interface logic with system of ISA bus

摘要

PURPOSE: A PB(Parallel Bus) bus interface logic with a system using an ISA(Industry Standard Architecture) bus is provided to additionally configure an ISA interface logic for transceiving data through the ISA bus from a motherboard or an external device having the built-in ISA bus, so as to temporarily store a transceived PB message in a queue and to process the message. CONSTITUTION: A subscriber board(100) connected to a subscriber for providing a service comprises a motherboard(110) having an ISA bus I/O port connected to the subscriber board(100) and also having an internal CPU. An ISA bus I/O port connector(120) connects an ISA bus I/O port controller(111) of the motherboard(110) with the subscriber board(100), and an ISA interface logic(130) connected with the ISA bus I/O port connector(120) for transceiving a PB message with a system. A control board(200) comprises a CPU(210) arranged internally, a receiving controller(220) receiving the PB message transmitted from the subscriber board(100), and a transmission controller(230) transmits the PB message to the system.