Multibus-International

Model: SBC547

Manufactured by: Intel Corporation

The SBC547 board is a terminal controller expansion for the Intel System 320. The board communicates with a MULTIBUS host as a slave board.

The board uses an Intel 80186 microprocessor, operating at 8 MHz as its CPU. The 80186 controls eight serial channels sending data to or receiving data form the MULTIBUS host. The on-board 80186 gains the attention of the MULTIBUS host by generating an interrupt over the MULTIBUS interface to the host. A flag byte mechanism allows the MULTIBUS host to interrupt the board, to reset the board, or to reset an interrupt to the MULTIBUS host generated to the board.

The eight serial interfaces on the SBC 547 board are through eight 9-pin connectors. The 9-pin connections are fully compatible with the IBM PCAT connections.

The SBC547 board has four on-board 82530 Serial Communications Controllers (SCC). Each 82530 SCC contains two on-chip baud rate generators, allowing each channel to be independently programmed for separate baud rates. The maximum transfer rate per channel is 19.2K baud.

The SBC547 board has four 64Kx4 DRAM (Dynamic Ram) devices, a total of 128 kbytes per board. The upper 32K bytes can be addressed by other MULTIBUS boards.

The SBC547 also includes two 28-pin sockets. These sockets are populated with firmware EPROMs.

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