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IBM
Desktop
XT 5160
IBM XT 5160 User Manual
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Specifications
The
specifications
for
the
keyboard
follow.
Power
Requirements
•
+5
Vdc
±
10%
•
Current
cannot
exceed
275
mAo
Size
•
Length:
492
millimeters
(19.4
inches)
•
Depth:
210
millimeters
(8.3
inches)
•
Height:
58
millimeters
(2.3
inches),
legs
extended
Weight
2.25
kilograms
(5.0
pounds)
4-51
145
147
Table of Contents
Table of Contents
10
Section 1. System Board
14
Section System Board1.
22
Description
24
Microprocessor
25
Data Flow Diagrams
26
System Memory Map
29
System Timers
31
System Interrupts
32
64/256K System Board
33
Ram
33
System Boards
33
256/640K System Board
34
Rom
34
Dma
35
I/O Channel
36
System Board Diagram
40
I/O Channel Description
41
I/O Address Map
45
I/O· Address Map
45
Other Circuits
47
Speaker Circuit
47
8255A I/O Bit Map
48
Environment
50
Power Cable
50
Size
50
Specifications
50
System Unit
50
Weight
50
Electrical
51
Heat Output
51
Noise Level
51
Connectors
53
Logic Diagrams - 64/256K
55
System Board
55
Logic Diagrams - 256/640K
67
Description Programming Interface Hardware Interface
80
Section 2. Coprocessor
80
Section 3. Power Supplies
86
Description
88
IBM Personal Computer XT Power Supply
88
Input Requirements
89
Outputs
89
Overvoltage/Overcurrent Protection
90
Power Good Signal
90
Connector Specifications and Pin Assignments
91
Description
92
IBM Portable Personal Computer Power Supply
92
Voltage and Current Requirements
92
Power Good Signal
93
Connector Specifications and Pin Assignments
94
Section 4. Keyboards
96
83-Key Keyboard Description
98
Introduction
98
Block Diagram
100
Character Codes
101
Encoding
101
Keyboard Encoding and Usage
101
Extended Codes
104
Extended Functions
104
Shift States
104
Special Handling
106
Extended Functions
107
Keyboard Layouts
107
Connector Specifications
114
Keyboard Logic Diagram
116
Description
117
Power-On Routine
120
Commands from the System
121
Commands to the System
121
Keyboard Scan Codes
123
Clock and Data Signals
127
Keyboard Encoding and Usage
128
Keyboard Layouts
139
Specifications
146
Section 5. System Bios
148
System BIOS Usage
150
Quick Reference - 256/640K Board
158
Quick Reference - 64/256K Board
258
Section 6. Instruction Set
324
8088 Register Model
326
Operand Summary
327
Second Instruction Byte Summary
327
Memory Segmentation Model
328
Segment Override Prefix
329
Use of Segment Override
329
8088 Instruction Set
330
Data Transfer
330
Arithmetic
333
Logic
336
String Manipulation
338
Control Transfer
339
8088 Instruction Set Matrix
343
8088 Conditional Transfer Operations
345
Processor Control
346
8087 Coprocessor Instruction Set
347
Data Transfer
347
Comparison
348
Arithmetic
349
Constants
351
Transcendental
351
Processor Control
352
Section7. Characters, Keystrokes, and Colors
356
Character Codes
358
Quick Reference
369
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IBM XT 5160 Specifications
General
Brand
IBM
Model
XT 5160
Category
Desktop
Language
English
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