Technical Reference Guide
Chapter 5
INPUT/OUTPUT INTERFACES
5. Chapter 5 INPUT/OUTPUT INTERFACES
5.1INTRODUCTION
This chapter describes the standard (i.e., system board) interfaces that provide input and output (I/O) porting of data and specifically discusses interfaces that are controlled through
♦ Enhanced IDE interface (5.2) | page | |
♦ Diskette drive interface (5.3) | page | |
♦ | Serial interfaces (5.4) | page |
♦ | Parallel interface (5.5) | page |
♦ Keyboard/pointing device interface (5.6) | page | |
♦ Universal serial bus interface (5.7) | page | |
♦ | Audio subsystem (5.8) | page |
♦ Network Interface Controller (5.9) | page |
5.2ENHANCED IDE INTERFACE
The enhanced IDE (EIDE) interface consists of primary and secondary controllers integrated into the south bridge component of the chipset. Two
♦Programmed I/O (PIO) mode – CPU controls drive transactions through standard I/O mapped registers of the IDE drive.
♦8237 DMA mode – CPU offloads drive transactions using DMA protocol with transfer rates up to 16 MB/s.
♦Ultra ATA/100 mode – Preferred bus mastering
5.2.1IDE PROGRAMMING
The IDE interface is configured as a PCI device during POST and controlled through
Compaq D315 and hp d325 Personal Computers
Featuring the AMD Athlon XP Processor
Second Edition - April 2003