Hardware Specifications and Configurations
1-41
System IO Address Map
I/O address (hex)
System function (shipping configuration)
000 - 00F
DMA controller no. 1
010 - 01F
Unused
020 - 021
Interrupt controller no. 1
022 - 03F
Unused
040 - 043
Counter/timer registers
060
Keyboard controller
061
Speaker controller
062 - 063
Unused
064
Keyboard controller
065 - 06F
Unused
070 - 071
CMOS/RTC
072 - 073
Alternate RTC address port / data port
074 - 080
Unused
081 - 08F
DMA page registers
090 - 091
Unused
092
FAST INIT register
093 - 09F
Unused
0A0 - 0A1
Interrupt controller no. 2
0A2 - 0BF
Unused
0C0 - 0DF
DMA controller no. 2
0E0 - 0EF
Unused
0F0 - 0FF
Numeric data processor
100 - 3AF
Unused
3B0 - 3BB
VGA
3BC - 3BF
Unused
3C0 - 3DF
VGA
3E0 - 40A
Unused
40B
DMA1 Extend
40C - 4CF
Unused
4D0
Interrupt edge control
4D1 - 4D5
Unused
Summary of Contents for E644
Page 1: ...eMachines E644 E644G SERVICEGUIDE ...
Page 4: ...iv ...
Page 10: ...x ...
Page 11: ...CHAPTER 1 Hardware Specifications ...
Page 14: ...1 4 ...
Page 53: ...CHAPTER 2 System Utilities ...
Page 80: ...2 28 System Utilities ...
Page 81: ...CHAPTER 3 Machine Maintenance Procedures ...
Page 84: ...3 4 ...
Page 118: ...3 38 Machine Maintenance Procedures ID Size Quantity Screw Type B ICW50 CPU Thermal Screw 4 ...
Page 135: ...CHAPTER 4 Troubleshooting ...
Page 162: ...4 28 Troubleshooting ...
Page 163: ...CHAPTER 5 Jumper and Connector Locations ...
Page 172: ...5 10 Jumper and Connector Locations ...
Page 173: ...CHAPTER 6 FRU Field Replaceable Unit List ...
Page 174: ...6 2 Exploded Diagrams 6 4 FRU List 6 6 Screw List 6 18 ...
Page 191: ...CHAPTER 7 Model Definition and Configuration ...
Page 192: ...7 2 eMachines E644 7 3 eMachines E644G 7 8 ...
Page 200: ...7 10 Model Definition and Configuration ...
Page 201: ...CHAPTER 8 Test Compatible Components ...
Page 202: ...8 2 Microsoft Windows 7 Environment Test 8 4 ...
Page 212: ...8 12 Test Compatible Components ...
Page 213: ...CHAPTER 9 Online Support Information ...
Page 214: ...9 2 Introduction 9 3 ...
Page 216: ...9 4 Online Support Information ...