Compaq 164SX User Manual Page 72
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- Table of contents
- BOOKMARKS
- AlphaPC 164SX Motherboard 1
- Technical Reference Manual 1
- Contents 3
- 4 Functional Description 4
- Preface 9
- Conventions 10
- Term Words Bytes Bits Other 11
- Signal Names 13
- UNPREDICTABLE and UNDEFINED 13
- • UNPREDICTABLE 13
- • UNDEFINED 14
- Introduction 15
- 1.1.1 21174 Core Logic Chip 17
- 1.1.2 Memory Subsystem 17
- (Sheet 2 of 2) 18
- 1.2 Software Support 19
- 1.3 Hardware Design Support 20
- 2.4 Password Bypass (CF2) 25
- 2.5 Fail-Safe Booter (CF7) 25
- 2.6 Mini-Debugger (CF3) 26
- (Sheet 1 of 2) 29
- This pinout is ATX-compliant 33
- Pin Signal Description 33
- Pin Voltage 33
- 3.1 Power Requirements 37
- 3.3 Board Dimensions 38
- Board Dimensions 39
- 3.3.1 ATX Hole Specification 39
- Functional Description 41
- 4.2 21174 Core Logic Chip 43
- 21174 Core Logic Chip 45
- 4.2.3 PCI Devices 45
- • 32-bit memory space 45
- • 32-bit I/O space 45
- 4.3 ISA Bus Devices 46
- ISA Bus Devices 47
- 4.3.2 ISA Expansion Slots 48
- 4.3.3 ISA I/O Address Map 48
- 4.4 Interrupts 49
- Interrupts 50
- 4.5 System Clocks 52
- System Clocks 53
- 4.6 Reset and Initialization 54
- 4.7 DC Power Distribution 55
- Upgrading the AlphaPC 164SX 57
- 5.2 Upgrading SDRAM Memory 58
- ±1 in-lb 61
- ±2 in-lb 61
- A.1 Customer Support 63
- A.2 Supporting Products 64
- A.3 Alpha Products 65
- A.4 Alpha Documentation 66
- A.5 Third–Party Documentation 67
- Numerics 69
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