Intel 386 manual Eisa Chip SET

SYSTEM OVERVIEW

The 82385 I Cache Controller is a high performance peripheral designed specifically for

. the Intel386 DX microprocessor. The 82385 allows the Intel386 DX microprocessor to reach its full performance potential by offering the following features:

•Supports a 32-kbyte cache memory organized as either 2-way set associative or direct mapped.

•Integrated cache directory and management logic.

•Utilizes posted writes for zero wait states on write cycles.

•Guarantees cache coherency by bus watching.

•Supports non-cacheable accesses.

•Presents an Inte1386 DX microprocessor interface to system resources.

•Dhrystone benchmark shows an average hit rate of 95%.

1.5EISA CHIP SET

EISA extends the 32-bit transfer capability of the Intel386 DX microprocessor to the I/O expansion bus. The 82350 chip set is a highly integrated solution in a 5-piece chip set using 3 components:

•82358 EISA Bus Controller

•82357 Integrated System Peripheral

•82352 EISA Bus Buffer (3 used)

The 82355 Bus Master Interface Controller (BMIC) is provided for add-in board sup- porL The BMIC provides all of the necessary control signals, address lines and data lines for an EISA bus master to interface to the EISA bus.

The EISA specification and the 82350 chip set are both designed to be 100% backward compatible to the ISA (Industry Standard Architecture) AT-bus. Therefore, software and add-in boards designed for the ISA bus may be used in higher performance EISA systems.

This high performance, high integration 82350 EISA solution is designed to be used with the Intel486 DX and Intel386 SX microprocessors as.well as the Intel386 DX micropro- cessor (up to and including 33 MHz).

1.6 MCA CHIP SET

The 82311 chip set consists of standard peripheral components for implementing an IBM PS/2 compatible motherboard which supports the Micro Channel Architecture. Included in the Micro Channel compatible chip set are seven highly integrated VLSI peripherals including:

e' 82303 Local I/O Support Chip

•82304 Local I/O Support Chip

•82307 DMNCACP Controller

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