Isa Bus Overview; Isa Connector 3 - Compaq Deskpro EP 6233 Technical Reference Manual

Chapter 4 System Support
4.4

ISA BUS OVERVIEW

NOTE: This section describes the ISA bus in general and highlights bus
implementation in this particular system. For detailed information regarding ISA bus
operation, refer to the Compaq Extended Industry Standard Architecture (EISA)
Technical Reference Guide.
The industry standard architecture (ISA) bus provides an 8-/16-bit path for standard I/O
peripherals as well as for optional devices that can be installed in the ISA expansion slots. Figure
4-8 shows the key functions and devices that reside on the ISA bus.
66-MHz slot 1 (2-DIMM) system only
Figure 4–8. ISA Bus Block Diagram
4-16 Compaq Deskpro EP Series of Personal Computers
PCI Bus
82371 South Bridge
PCI/ISA
Bridge Function
8-/16-Bit ISA Bus
PC 87309 I/O Controller
Keyboard/ Diskette
Mouse I/F I/F
First Edition - April 1998

ISA Connector 3

ISA Connector 2
BIOS ROM
and Buffers
ISA Connector 1
Serial Parallel
I/F (2) I/F