IBM XT 5160

Connector Specifications and Pin Assignments 3-6
IBM Portable Personal Computer Power Supply 3-7
Description 3-7
Voltage and Current Requirements 3-7·
Power Good Signal 3-8
Connector Specifications and Pin Assignments 3-9
SECTION 4. KEYBOARDS 4-1
Introduction 4-3
83-Key Keyboard Description 4-3
Block Diagram 4-5
Keyboard Encoding and Usage 4-6
Extended Codes 4-9
Keyboard Layouts 4-12
Connector Specifications 4-19
Keyboard Logic Diagram 4-21
101/102-Key Keyboard 4-22
Description 4-22
Power-On Routine 4-25
Commands from the System 4-26
Commands to the System 4-26
Keyboard Scan Codes 4-28
Clock and Data Signals 4-32
Keyboard Encoding and Usage 4-33
Keyboard Layouts 4-44
Specifications 4-51
Logic Diagram 4-52
SECTION 5. SYSTEM BIOS
5-1
System BIOS Usage 5-3
System BIOS Listing -
11/22/85 5-11
Quick Reference -
256/640K Board 5-11
System BIOS Listing -
11/8/82 5-111
Quick Reference -
64/256K Board 5-111
SECTION 6. INSTRUCTION SET 6-1
8088 Register Model 6-3
Operand Summary 6-4
Second Instruction Byte Summary 6-4
Memory Segmentation Model 6-5
Segment Override Prefix 6-6
Use of Segment Override 6-6
8088 Instruction Set 6-7
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