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Personal System/2 65 SX
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IBM Personal System/2 65 SX Technical Reference
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Contents
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Table of Contents
Table of Contents
System Overview
System-Board Features
Eee
System-Board I/O Address Map
Specifications
Output Protection
Power Supply Connectors
System-Board I/O Address Map
Physical Specifications
Component Maximum Current
Channel Load Current
Power Supply
Section 2. Programmable Option Select
System-Board Enable/Setup Register (Hex 0094)
System-Board POS Register 2 (Hex 0102)
System-Board POS Register 5 (Hex 0105)
System-Board POS Address Map
Card-Selected Feedback
System-Board POS I/O Address Map
System-Board Enable/Setup Register (Hex 0094)
System-Board POS Register 2 (Hex 0102)
System-Board POS Register 3 (Hex 0103)
System-Board POS Register 4 (Hex 0104)
Adapter Setup
Section 3. System Board
Arbitration-Bus Priority Assignments
System-Memory Map
RT/CMOS Address and NMI Mask Register (Hex 0070)
RT/CMOS Data Register (Hex 0071)
Real-Time Clock Bytes
Description
Microprocessor and Math Coprocessor
Micro Channel Implementation
Central Arbiter
Arbitration Register, Write to Hex 0090
Arbitration Register, Read Hex 0090
Memory
ROM Subsystem
Diskette-Drive Connector
System-Memory Map
Error Recovery
System-Board Memory Connectors
Rt/Cmos Ram
Status Registera
Status Registerb
Status Registerc
Status Registerd
Diskette-Drive-Type Bits (Bits 3-0)
Equipment Byte
Nonmaskable Interrupt
Power-On Password
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