NonStop S-Series Server Description Manual (G06.24+)

Contents

HP NonStop S-Series Server Description Manual—520331-003

2. Principles of System Operation

Tri-Star Topology 1-44

Layered Topologies for 6780 Switches 1-46

Connections Between Zones in Layered Topology 1-48

2. Principles of System Operation

ServerNet Devices 2-2

ServerNet Device Identification 2-4

ServerNet Packets 2-6

Packet Transmission and Reception 2-8

Sequence for Outgoing Requests 2-10

Sequence for Responses to Outgoing Requests 2-12

Sequence for Incoming Requests 2-14

Sequence for Responses to Incoming Requests 2-16

3. TNS Data Formats and Number Representations

TNS Words and RISC Words 3-2

TNS Data Formats 3-4

TNS Byte Instructions 3-6

Instructions for Unsigned and Signed Arithmetic 3-8

Instructions for Decimal and Floating-Point Arithmetic 3-10

4. Memory Addressing and Access

The Process Address Space 4-2

Organization of the Process Address Space 4-4

Addressing in the Process Address Space 4-6

Address Formats 4-8

Selectable and Flat Logical Segments 4-10

First Four Relative Segments

4-12

Main Stack and SRL Data

4-14

Last Eight Regions 4-16

Native Process Code Allocations 4-18

TNS Process Code Allocations 4-20

Allocation for TNS and Accelerated Code 4-22

Chart of Nonprivileged Space Allocation 4-24

Physical Memory Addressing 4-26

Kseg0 Usage 4-28

Kseg2 Usage 4-30

Kseg1 Memory Access 4-32

Kseg0 Memory Access 4-34

Kseg2 and Nonprivileged Space Memory Access 4-36