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Model 990 Computer TX990 Operating System Documentation
Company:
Texas Instruments
Part:
944776-9701 Change 1
Date:
1977-12-15
Keywords:
Copies
No copies known to be online.
Table of Contents
Section I
Scope of the TX990 Operating System
1.1
Introduction
Section II
TX990 Structure
2.1
TX990 Operating System Control Flow
2.2
Task Scheduler
2.3
Memory Management
2.4
Supervisor Call Interface
2.5
Input/Output Operations
2.6
File Management Tasks (FMP1, FMP2, FMP3, FMP4, FUR, VOLUME)
2.7
Operator Control
2.8
Diagnostic Task (DTASK), Task 0D₁₆
2.9
Initial Start Task (STASK), Task 10₁₆
2.10
Single Dynamic Task Loader Routine
2.11
Multiple Dynamic Task and Procedure Loader
2.11.1
Install Task Call Block
2.11.2
Install Procedure Call Block
2.11.3
Delete Task Call Block
2.11.4
Delete Procedure Call Block
2.12
Control Program (CNTROL), Task 16₁₆
2.13
Rebid Task
Section III
Privileged Supervisor Calls
3.1
General
3.2
Get System Table
3.3
Direct Disc I/O
3.3.1
Introduction
3.3.2
Track-based I/O
3.3.3
Allocation Unit-based I/O
3.3.4
Floppy Disc Special Operations
3.3.5
Disc DSR Errors
3.3.6
Disc Read Format Data (Diskette)
Section IV
Modifying TX990
4.1
General
4.2
Support of Nonstandard Devices
4.2.1
Physical Device Table
4.2.2
Interrupt Routine
4.2.3
Device Service Routine
4.3
Extended Operations Routines
4.4
User-Supplied Supervisor Call Routines
4.5
Operator Command Processing
4.5.1
Modifying an OCP Command
4.5.2
Adding an OCP Command to a Module
4.5.3
Adding an OCR Command Module
Section V
Data Structures
5.1
General
5.2
TXDATA
5.2.1
Device Name Table
5.2.2
Logical Device Table
5.2.3
Buffer Pool
5.2.4
FMPBUF
5.2.5
Physical Device Tables
5.2.6
Multiunit Workspace
5.2.7
Keyboard Status Block
5.2.8
Interrupt Vector Table
5.2.9
Interrupt Decoder
5.2.10
User-defined SVC Table
5.2.11
Active Queue Weighting Factors
5.2.12
Intertask Message Queue
5.3
Task Definition
5.3.1
Task Status Block
5.4
TXROOT
5.4.1
System Table
5.4.2
System Flags
5.4.3
Queues
5.4.4
Supervisor Call (SVC) Table
5.5
Physical Diskette Structure
5.6
Logical Diskette Structure
5.6.1
Boot Loader
5.6.2
Disc Information Block
5.6.3
Allocation Bit Map
5.6.4
Bad Allocation Bit Map
5.6.5
Directory
5.7
Logical File Structure
5.7.1
Sequential File
5.7.2
Relative Record File
5.7.3
File Control Block (FCB)
Section VI
Module Descriptions
6.1
General
6.2
TX990 Kernel Modules
6.2.1
TXROOT
6.2.2
TSKFUN
6.2.3
IOSUPR
6.2.4
CNVRSN
6.2.5
MEMSVC
6.2.6
TBUFMG
6.2.7
TSKLDR
6.2.8
TITTCM
6.2.9
CRTPRO
6.2.10
STA913
6.2.11
STA911
6.2.12
SVC913
6.2.13
SVC911
6.2.14
EVENTK
6.2.15
DTASK
6.2.16
TXSTRT
6.2.17
TXEND
6.2.18
STASK
6.2.19
IMGLDR
6.2.20
DMEMSVC
6.2.21
DYNSTK
6.2.22
DTSKLDR
6.3
Device Service Routines
6.3.1
FPYDSR
6.3.2
DSR733
6.3.3
KSRDSR
6.3.4
DSR913
6.3.5
DSR911
6.3.6
LPDSR
6.3.7
CRDSR
6.3.8
DSRTTY
6.3.9
DSRSMT
6.3.10
DIGDSR
6.3.11
FLPDSR
6.4
File Management
6.4.1
File I/O Supervisor Call Processor Modules
6.4.2
File Utility Module Descriptions
6.4.3
Volume (Volume Name Support)
6.5
Operator Communication Package (OCP)
6.5.1
OCPTSK
6.5.2
OCPTBL
6.5.3
OCPPRC
6.5.4
OCPLRT
6.5.5
DOCPLRT
6.5.6
OCPSLD
6.5.7
OCPIOU
6.5.8
DOCPIOU
6.5.9
OCPTAD
6.5.10
OCPTLD
6.5.11
OCPEND