EISA SYSTEM COMPONENT (ESC)

This document describes both the 82374EB and 82374SB components. Unshaded areas describe the
82374EB. Shaded areas, like this one, describe the 82374SB operations that differ from the 82374EB.

The 82374SB also contains support for SMM power management

Integrates EISA Compatible Bus Controller
 Translates Cycles Between EISA and ISA Bus
 Supports EISA Burst and Standard Cycles
 Supports ISA Zero Wait-State Cycles
 Supports Byte Assembly/ is assembly for 8-, 16- and 32-Bit Transfers
 Supports EISA Bus Frequency of up to 8.33 MHz
Supports Eight EISA Slots
 Directly Drives Address, Data and Control Signals for Eight Slots
 Decodes Address for Eight Slot Specific AENs
Provides Enhanced DMA Controller
 Provides Scatter-Gather Function
 Supports Type A, Type B, Type C (Burst), and Compatible DMA Transfer
 Provides Seven Independently Programmable Channels
 Integrates Two 82C37A Compatible DMA Controllers
Integrates the Functionality of two 82C59 Interrupt Controllers and two 82C54 Timers
 Provides 14 Programmable Channelsfor Edge or Level Interrupts
 Provides 4 PCI Interrupts Routible to any of 11 Interrupt Channels
 Supports Timer Function for Refresh Request, System Timer, Speaker Tone, Fail Safe Timer, and CPU Speed Control
Advanced Programmable Interrupt Controller (APIC)
 Multiprocessor Interrupt Management
 Separate Bus For Interrupt Messages
5V CMOS Technology
82374SB System Power Management (Intel SMM Support)
  Fast On/Off Support via SMI Generation Hardware Events, Software Events, EXTSMIÝ, Fast Off Timer, System Events
 Programmable CPU Clock Control
 Enables Energy Efficient Desktop Systems