INTEL iSBC-286/12
SINGLE BOARD COMPUTER

General Description
Documents
Block Diagram
Summary

General description

The iSBC 286/12 Single Board Computers is members of Intel’s high performance family of 16-bit microcomputers.

The board feature an 80286 microprocessor running at 8 MHz together with 1 megabyte of dual-ported, 0 wait-state, parity memory. These features make the iSBC 286/12 board the ideal single board solution for applications requiring high performance and up to 1 megabyte of memory. For those applications needing more memory, up to four memory expansion boards may be connected to the iSBC 286/12 boards over its P2 interface. The P2 interface supports both standard iLBX memory boards and Intel’s EX series of synchronous, 0 wait-state, memory boards that provide up to 16 megabytes of system memory. The iSBC 286/12 board also feature two sockets for user installed 80287 Numeric Data Processor and 82258 Advanced Direct Memory Access Controller devices.
These components further increase board performance by off-loading time intensive tasks from the 80286 microprocessor. The iSBC 286/12 CPU board is true single-board solutions that also include two serial lI/O channels, one parallel line printer channel, local memory, interrupt controllers and programmable timers all on one board.

 

The following list briefly describes some of the major features of the iSBC-286/12 board:

  • 8 MHz 80286 Microprocessor
  • Two JEDEC 28-Pin Sites for up to 128K Bytes of Local EPROM Memory, Expandable to 256K ytes Using an iSBC® 341 Expansion Module
  • 1 Megabyte, 0 Wait-State, Dual-Port, Parity Memory
  • Supports User Installed 80287 Numeric Data Processor and 82258 Advanced DMA Controller Devices
  • Two iSBX Bus Interface Connectors for I/O Expansion
  • Synchronous High-Speed Interface for 0 Wait-State Read/Write to EX Memory Expansion Boards
  • iLBX Interface for iLBX Memory Board Expansion
  • 16 Levels of Vectored Interrupt Control
  • Centronics-Compatible Parallel I/O Printer Interface
  • Two Programmable Multiprotocol Synchronous/ Asynchronous Serial Interfaces; One RS232C, the Other RS232C or RS422/449 Compatible

Block diagram

The MULTIBUS System Architecture

The MULTIBUS, system architecture includes 'three bus structures: the system bus, the local bus extension and the iSBX MULTIMODULE expansion bus. Each bus structure is optimized to satisfy particular system requirements. The system bus provides a basis for general system design including memory and I/O expansion as well as multiprocessing support. The local bus extension allows large amounts of high performance memory to be accessed from a CPU board over a private bus. The MULTIMODULE extension bus is a means of adding inexpensive I/O functions to a base CPU board. Each of these three bus structures are implemented on the iSBC-286/12 board providing a total system architecture solution.