Description:

Overview:

The Intel 82350DT EISA chip set is the industry's first 100% EISA/ISA compatible chip set. The 82350DT EISA chip set supports the 50, 33 MHz and 25 MHz 386 CPU or i486 CPU, 82385 Cache Controller, and optional 80387 numerics coprocessor. The core EISA chip set includes three chips:

• 82352DT EISA Bus Buffers (EBB) (Optional)
• 82357 Integrated System Peripheral (ISP)
• 82358 EISA Bus Controller (EBC)

The ISP performs the DMA functions of the system and is fully compatible with ISA functions. It integrates seven 32-bit DMA channels, five 16-bit timer/ counters, two eight channel interrupt controllers, and provides for multiple NMI control and generation. It provides refresh address generation and keeps track of pending refresh requests when the bus is unavailable. The ISP supports multiple EISA bus masters while offering intelligent system arbiter services which grant the bus on a rotational basis.

The EBC is the EISA "engine". It is an intelligent bus controller that controls 8, 16 and 32-bit bus masters and slaves. It provides the state machine interface to Host, ISA and EISA busses and other IC's in the chip set. It offers a simple interface to the 386/i486 CPU and EISA bus. The EBC services as a bridge between the EISA and ISA devices. Data bus size mismatches are handled automatically by the EBC (including byte assembly and disassembly). It also guarantees cache operation on the Host, EISA, and ISA busses.

Configurations:

82350 Mode:

• 82358DT EISA Bus Controller
• 82357 Integrated System Peripheral (ISP)
• 82352DT EISA Bus Buffers (EBB) (Optional 0-3)
  • 82352DT As Data Swap Buffer
  • 82352DT As Address Buffer
  • 82352DT As Data Parity Buffer

The 82350DT can directly replace the 82350 in this configuration.

82350DT Enhanced system Mode:

• 82358DT EISA Bus Controller
• 82359 DRAM Controller
• 82357 Integrated System Peripheral (ISP)
• 82352DT EISA Bus Buffers (EBB) (As Address Buffer)
• 82353 Advanced Data Path Device (2x)
• 82351 Local I/O EISA Support Peripheral (LIOE)

82350DT Buffered system Mode:

• 82358DT EISA Bus Controller
• 82359 DRAM Controller
• 82357 Integrated System Peripheral (ISP)
• 82352DT EISA Bus Buffers (EBB)
  • 82352DT As Address Buffer
  • 82352DT As Data Buffer
• 82353 Advanced Data Path Device (2x)
• 82351 Local I/O EISA Support Peripheral (LIOE)

See also: 82350 EISA Chip Set

Documented parts

• Intel 82351 (LIO.E)
• Intel 82352DT (EBB)
• Intel 82353 (ADP)
• Intel 82357 (ISP)
• Intel 82358DT (EBC)
• Intel 82359 (DRAM Controller)