

	Software
	Release
	Announcement
	

CTOS III
R1.2.0
B25V10









To order additional copies of this document
	United States customers, call Unisys Direct at 18004481424.
	All other customers, contact your Unisys Sales Office.
	Unisys personnel, use the Electronic Literature Ordering (ELO) system.
	
Distribution lists:
SA, SN, SU, SW, PR5
System:	CTOS
Release:	R1.2.0
	April 1994
Part Number:	43597434003
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Contents
Section 1	
General Description		1
1.1	File Naming Conventions		2
1.2	Preconfigured Operating Systems		3
1.3	Standards		3
Section 2	
Release Functionality		5
2.1	Hardware Support		5
2.1.1	SGS3400 ISA Server		5
2.1.2	CTOS IO Processors (IOPs)		5
2.1.3	SG1000 and SG1200 Notebook Workstations		7
2.1.4	SG4000SG6000SG7000 EISA Systems		7
2.1.5	Generic Common Platform Support		7
2.2	Installable Client and Server Agents		8
2.3	System Configuration File		8
2.3.1	RamExclude Entry		9
2.4	Debugger		10
2.4.1	IO Breakpoints on Pentium Machines		11
2.4.2	Extensions to the CodeV Display		11
2.4.3	DateTime type support in the Structure formatter		11
2.4.4	Other Debugger changes		11
2.5	System Administration		12
2.6	New Operations		12
2.6.1	Request Procedural Interfaces		12
2.6.2	SystemCommon Procedural Interfaces		12
2.7	Status Codes		13
2.7.1	Operating system		13
2.7.2	File system		14
2.7.3	SCSI Manager		14
Section 3	
Product Interdependencies		15
3.1	Software		15
3.1.1	Required Software		15
3.1.2	OS Memory Sizing		16
3.2	Hardware		17
3.2.1	Required Hardware		17
3.2.2	Recommended Additional Hardware		17
3.3	Software Compatibility Matrix		18
Section 4	
Migration Requirements		23
4.1	Compatibility with Previous Versions		23
4.2	Hardware Configuration Changes Required		23
4.3	Software Configuration Changes Required		23
4.4	Application Compatibility		24
Section 5	
Corrections		25
Section 6	
Restrictions and Known Limitations		29
6.1	Known Limitations		29
6.1.1	CTOS 		29
6.1.1.1	Configuration File Parameters		29
6.1.1.2	File System		29
6.1.1.3	Debugger		30
6.1.1.4	Keyboard		30
6.1.2	Supported Products		30
6.1.3	System Configuration		30
6.1.3.1	SG4000		30
6.1.3.2	SG60007000		30
6.2	General Information		30
6.2.1	System Administration		30
6.2.1.1	Videoless Server Workstations		30
6.2.1.2	SG1000SG1200 Keyboard		31
6.2.1.3	ICC Block Allocation		31
6.2.1.4	Updates to Configuration File Entries		31
6.2.1.5	Updating the Configuration File		31
6.2.1.6	Configuring with 128MB of Memory		32
6.2.1.7	Adjusting Sysgen parameters		32
6.2.1.8	IO Port Conflict with the ClientCard		33
6.2.1.9	SG1000 and SG1200 Setup Option		33
Section 7	
Support		35
7.1	Introduction		35
7.2	Warranty		35
7.3	Support Category		35
7.4	Support Discontinuance		36
7.5	Product Assistance		37
7.5.1	Instructions		37
7.5.2	Environment		37
7.5.3	Software Components		37
7.5.4	Hardware Components		38
7.5.5	Circumstances		38
Section 8	
Customer Product Information		39
8.1	Overview		39
8.2	CTOS User Documentation		39
8.3	Recommended Additional User Documentation		40
8.4	CTOS Programming Documentation		40
Section 9	
List of Files on Product Media		43
9.1	Contents of the Distribution Diskettes		43
9.2	Required Files		46
Section 10	
Ordering Procedure		47
Section 1	
General Description	
This Software Release Announcement (SRA) describes CTOS III R1.2.0.  It provides a highlevel product feature description and information about support and how to order CTOS III R1.2.0.
CTOS III is a realtime multitasking, messagebased operating system.  It provides a multiuser environment, sophisticated virtual memory management, comprehensive file management, and shared resource processing over the CTOS cluster.
This release of CTOS III introduces support for the new ISAbased small server systems, the SGS3400 series.  These CTOS server systems have been designed to provide a cost effective CTOS server solution for clusters consisting of a small number of workstations.
As this CTOS release is an evolution of the CTOS III R1.1 release, it continues to provide full support for the hardware products supported by release R1.1.  These include:
	 Multiprocessor operation on the SG4000 and SG6000 80486 based models, and SG7000 Pentium EISA processor models, using the looselycoupled multiprocessor architecture that first debuted on the CTOSXE platform.  
	 Support of the SG24003400 ISA based client workstations.  These are highly cost effective CTOS Client cluster workstations based upon industry standard hardware architectures.
	 Support for the SG10001200, the CTOS notebook computers.  These units are supported in both 386 and 486 microprocessor versions with either color or monochrome displays.
	 Continued support for the 80386 based Unisys BSeries of modular CTOS workstations, and their Convergent cousins.  See the hardware compatibility matrix elsewhere in this document.

1.1	File Naming Conventions	
This CTOS III release is both a server and a workstation release and is comprised of a variety of files whose names describe the functionality and contents of the file.  The following tables indicate the compon