UPGRADING REPAIRING PCs

More documents

Recommendations

Info

54 Chapter 2—System Components and Configuration I/O Port Addresses Your computer’s I/O ports enable communications between devices and software in your system. They are equivalent to two-way radio channels. If you want to talk to your serial port, you need to know which I/O port (radio channel) it is listening on. Similarly, if you want to receive data from the serial port, you need to listen on the same channel on which it is transmitting. One confusing issue is that I/O ports are designated by hexadecimal addresses similar to memory addresses. They are not memory; they are ports. Motherboard and chipset devices are normally set to use I/O port addresses from 0h to FFh, and all other devices use from 100h to FFFFh. Table 2.22 shows motherboard and chipset-based I/O port usage. Table 2.22 Motherboard and Chipset-Based Device Port Addresses Address (Hex) Size Description 0000–000F 16 bytes Chipset - 8237 DMA 1 0020–0021 2 bytes Chipset - 8259 interrupt controller 1 002E–002F 2 bytes Super I/O controller configuration registers 0040–0043 4 bytes Chipset - Counter/Timer 1 0048–004B 4 bytes Chipset - Counter/Timer 2 0060 1 byte Keyboard/Mouse controller byte - reset IRQ 0061 1 byte Chipset - NMI, speaker control 0064 1 byte Keyboard/mouse controller, CMD/STAT byte 0070, bit 7 1 bit Chipset - Enable NMI 0070, bits 6:0 7 bits MC146818 - Real-time clock, address 0071 1 byte MC146818 - Real-time clock, data 0078 1 byte Reserved - Board configuration 0079 1 byte Reserved - Board configuration 0080–008F 16 bytes Chipset - DMA page registers 00A0–00A1 2 bytes Chipset - 8259 interrupt controller 2 00B2 1 byte APM control port 00B3 1 byte APM status port 00C0–00DE 31 bytes Chipset - 8237 DMA 2 00F0 1 byte Math coprocessor reset numeric error To find out exactly which port addresses are being used on your motherboard, consult the board documentation or look up the settings in the Windows Device Manager.
Other Add-On Card Configuration Issues 55 Bus-based devices (I/O devices found on the motherboard or on add-on cards) normally use the addresses from 100h on up. Table 2.23 lists the commonly used bus-based device addresses and some common adapter cards and their settings. Table 2.23 Bus-Based Device Port Addresses Address (Hex) Size Description 0130–0133 4 bytes Adaptec SCSI adapter (alternate 0134–0137 4 bytes Adaptec SCSI adapter (alternate) 0168–016F 8 bytes Fourth IDE interface 0170–0177 8 bytes Secondary IDE interface 01E8–01EF 8 bytes Third IDE interface 01F0–01F7 8 bytes Primary IDE/AT (16-bit) hard disk controller 0200–0207 8 bytes Gameport or joystick adapter 0210–0217 8 bytes IBM XT expansion chassis 0220–0233 20 bytes Creative Labs Sound Blaster 16 audio (default) 0230–0233 4 bytes Adaptec SCSI adapter (alternate) 0234–0237 4 bytes Adaptec SCSI adapter (alternate) 0238–023B 4 bytes MS bus mouse (alternate) 023C–023F 4 bytes MS bus mouse (default) 0240–024F 16 bytes SMC Ethernet adapter (default) 0240–0253 20 bytes Creative Labs Sound Blaster 16 audio (alternate) 0258–025F 8 bytes Intel above board 0260–026F 16 bytes SMC Ethernet adapter (alternate) 0260–0273 20 bytes Creative Labs Sound Blaster 16 audio (alternate) 0270–0273 4 bytes Plug-and-Play I/O read ports 0278–027F 8 bytes Parallel Port 2 (LPT2) 0280–028F 16 bytes SMC Ethernet adapter (alternate) 0280–0293 20 bytes Creative Labs Sound Blaster 16 audio (alternate) 02A0–02AF 16 bytes SMC Ethernet adapter (alternate) 02C0–02CF 16 bytes SMC Ethernet adapter (alternate) 02E0–02EF 16 bytes SMC Ethernet adapter (alternate 02E8–02EF 8 bytes Serial Port 4 (COM 4) 02EC–02EF 4 bytes Video, 8514, or ATI standard port 02F8–02FF 8 bytes Serial Port 2 (COM 2) 0300–0301 2 bytes MPU-401 MIDI port (secondary) 0300–030F 16 bytes SMC Ethernet adapter (alternate) 0320–0323 4 bytes XT (8-bit) hard disk controller 0320–032F 16 bytes SMC Ethernet adapter (alternate) 0330–0331 2 bytes MPU-401 MIDI port (default) 0330–0333 4 bytes Adaptec SCSI adapter (default) 0334–0337 4 bytes Adaptec SCSI adapter (alternate)
Page 1 and 2:
UPGRADING AND REPAIRING PCs TECHNIC
Page 3 and 4:
Associate Publisher Greg Wiegand Se
Page 5 and 6:
Contents 1 General Technical Refere
Page 7 and 8:
Contents vii IDE Hard Drive Identif
Page 9 and 10:
Serial Port Configuration 172 Avoid
Page 11 and 12:
Contents xi Sound Quality Standards
Page 13 and 14:
About the Authors Scott Mueller is
Page 15 and 16:
watch, photograph, and (occasionall
Page 17 and 18:
Tell Us What You Think! As the read
Page 19 and 20:
Chapter 1 General Technical Referen
Page 21 and 22: Understanding Bits, Nibbles, and By
Page 23 and 24: Note Glossary of Essential Terms 5
Page 25 and 26: Glossary of Essential Terms 7 Table
Page 27 and 28: Glossary of Essential Terms 9 Table
Page 29 and 30: Table 1.5 Hexadecimal/ASCII Convers
Page 31 and 32: Hexadecimal/ASCII Conversions 13 Ta
Page 33 and 34: Table 1.5 Hexadecimal/ASCII Convers
Page 35: Hexadecimal/ASCII Conversions 17 Ta
Page 38 and 39: 20 Chapter 2—System Components an
Page 54 and 55: 36 Caution Chapter 2—System Compo
Page 56 and 57: 38 Table 2.15 Troubleshooting Power
Page 62 and 63: 44 modules can be divided by 9, but
Page 68 and 69: 50 Other Add-On Card Configuration
Page 87 and 88: Chapter 3 3 BIOS Configurations and
Page 89 and 90: Where BIOS Updates Come From 71 Tab
Page 91 and 92: How to Recover from a Failed BIOS U
Page 93 and 94: Note A complete list of PnP device
Page 95 and 96: Other BIOS Troubleshooting Tips 77
Page 97 and 98: Determining the Motherboard Manufac
Page 99 and 100: Determining the Motherboard Manufac
Page 101 and 102: Table 3.8 Common Keystrokes Used to
Page 103 and 104: Phoenix BIOS Beep Codes The followi
Page 105 and 106: Port 80h Beep Code Codes Error Mess
Page 107 and 108: BIOS Configuration Worksheet 89 BIO
Page 109 and 110: BIOS Configuration Worksheet 91 Sha
Page 111 and 112: 4 SCSI and IDE Hard Drives and Opti
Page 113 and 114: Cable key prevents improperly plugg
Page 115 and 116: Breaking the 504MB (528-Million-Byt
Page 117 and 118: Table 4.3 Using LBA Mode Operating
Page 119 and 120: 5. Use the #4 option—View Current
Page 121 and 122: Using LBA Mode 103 Table 4.6 Why ID
Page 123 and 124:
Sources for BIOS Upgrades 105 Table
Page 125 and 126:
Improving Hard Disk Speed 107 Figur
Page 127 and 128:
Bus-Mastering Chipsets for IDE 109
Page 129 and 130:
Table 4.13 Bus-Mastering Chipsets b
Page 131 and 132:
Table 4.14 Other IDE Drive Installa
Page 133 and 134:
standard single-ended SCSI devices
Page 135 and 136:
SCSI Drive and Device Configuration
Page 137 and 138:
SCSI Drive and Device Configuration
Page 139 and 140:
Following these tips will help mini
Page 141 and 142:
SCSI Configuration Troubleshooting
Page 143 and 144:
Using FDISK 125 Using FDISK FDISK i
Page 145 and 146:
Benefits of Hard Disk Partitioning
Page 147 and 148:
How FDISK and the Operating System
Page 149 and 150:
How FDISK and the Operating System
Page 151 and 152:
Now, the operating system can use t
Page 153 and 154:
The command switches are explained
Page 155 and 156:
MS-DOS Command-Line Access to CD-RO
Page 157 and 158:
• Make sure the drive shows up as
Page 159:
Troubleshooting Optical Drives 141
Page 162 and 163:
144 Chapter 5—Floppy, Removable,
Page 164 and 165:
Page 166 and 167:
Page 168 and 169:
Page 170 and 171:
Page 172 and 173:
Page 174 and 175:
156 • OnStream’s ADR (Advanced
Page 176 and 177:
Page 178 and 179:
160 Table 5.13 High-Performance Tap
Page 180 and 181:
Page 182 and 183:
Page 184 and 185:
166 Chapter 6—Serial Ports and Mo
Page 186 and 187:
168 Table 6.2 25-Pin (PC, XT, and P
Page 188 and 189:
170 Table 6.4 Overview of UART Chip
Page 190 and 191:
Page 192 and 193:
Page 194 and 195:
Page 196 and 197:
Page 198 and 199:
Page 200 and 201:
Page 202 and 203:
Page 204 and 205:
Page 206 and 207:
188 (These settings require changes
Page 208 and 209:
190 Chapter 7—Parallel Ports, Pri
Page 210 and 211:
192 Building a Parallel Loopback Pl
Page 212 and 213:
Page 214 and 215:
Page 216 and 217:
Page 218 and 219:
Page 220 and 221:
Page 222:
show all

UPGRADING REPAIRING PCs

Create successful ePaper yourself

Delete template?

Save as template?