User Manuals: IBM Personal System/2 50 Desktop Computer

Manuals and User Guides for IBM Personal System/2 50 Desktop Computer. We have 2 IBM Personal System/2 50 Desktop Computer manuals available for free PDF download: Technical Reference

IBM Personal System/2 50 Technical Reference

IBM Personal System/2 50 Technical Reference (62 pages)

Brand: IBM | Category: Desktop | Size: 1 MB

Table of Contents

Table of Contents
5
Section 1. System Overview
9
Description
11
System Board Features
11
1-1. Model and Submodel Bytes
11
1-2. System Board Devices and Features
12
System Board Block Diagram
13
System Board I/O Address Map
14
Specifications
15
1-5. Performance Specifications - Type 1 System Board
15
1-6. Performance Specifications - Type 2 System Board
16
1-7. Physical Specifications
17
Programmable Option Select
21
Description
21
Section 2. Programmable Option Select
21
POS Address Map
23
Card Selected Feedback
24
System Board Setup
24
Card Selected Feedback Register (Hex 0091)
24
System Board Enable/Setup Register (Hex 0094)
25
System Board POS Register 2 (Hex 0102)
26
2-4. System Board
26
2-5. Parallel Port Select Bits
26
P~S Register 2 (Hex 0102)
26
System Board POS Register 3 (Hex 0103)
27
System Board POS Register (Hex 0103)
27
Adapter Enable/Setup Register (Hex 0096)
28
System Board
29
Description
31
Micro Channel
31
Adapter Identification
31
Central Arbiter
31
Arbitration Bus Priority Assignments
32
Arbitration Register, Write to Hex 0090
33
Arbitration Register, Read Hex 0090
33
Central Arbiter Programming
33
Memory
35
Read-Only Memory Subsystem
35
Random Access Memory Subsystem
35
System Memory Map
36
System Memory Maps
36
System Board Memory Connector, Type
37
System Board Memory Connector
37
System Board Memory Connector, Type
38
3-7. Presence Detect Encoding
39
Real-Time Clock/Complementary Metal-Oxide Semiconductor RAM
40
RT/CMOS RAM Address Map
40
RT/CMOS Address Register and NMI Mask (Hex 0070)
41
RT/CMOS Data Register (Hex 0071)
41
RT/CMOS RAM I/O Operations
42
3-11. Real-Time Clock Bytes
43
Status Register a
44
Status Register B
44
Status Register C
46
Status Register D
46
Diagnostic Status Byte
47
CMOS RAM Configuration
47
Diskette Drive Type Byte
48
Equipment Byte
50
Miscellaneous System Functions
52
Nonmaskable Interrupt
52
System Control Port B (Hex 0061)
52
System Control Port a (Hex 0092)
54
Power-On Password
56
Type 2 Serial Port Controller
57
Hardware Compatibility
57
Index
59

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IBM Personal System/2 50 Technical Reference

IBM Personal System/2 50 Technical Reference (66 pages)

Brand: IBM | Category: Desktop | Size: 1 MB

Table of Contents

Table of Contents
7
Section 1. System Overview
11
- System Board I/O Address Map
  11
Description
13
- Model and Submodel Bytes
  13
System Board Features
13
System Board Block Diagram
15
- Physical Specifications
  19
- Acoustical Readings
  20
Power Supply
21
- Outputs
  21
- Component Maximum Current
  21
- Channel Load Current
  21
- Output Protection
  22
- Voltage Sequencing
  22
Section 2. Programmable Option Select
23
- System Board POS Register 2 (Hex 0102)
  23
Description
25
POS Address Map
27
Card Selected Feedback
28
System Board Setup
28
Micro Channel Implementation
35
- Exception Reporting
  35
- Adapter Identification
  35
- Central Arbiter
  35
- Arbitration Register, Read Hex0090
  37
- Read-Only Memory Subsystem
  39
- Random Access Memory Subsystem
  39
- Presence Detect Encoding
  43
- Status Registerc
  47
- Status Registera
  48
- Ram
  51
- Diagnostic Status Byte
  51
- Diskette Drive Type Byte
  53
- Diskette Drive Type Byte (Bits3-0)
  53

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