ABI 

The Application Binary Interface (ABI) defines the application interface to the B6700 Architecture and MCP.

The ABI describes the layout of  an executable codefile, how a codefile begins and ends execution, and how basic types can be created and destroyed.

These documents provide additional information and were used as references for this document.

• B6700 CodeFile Layout.  << complete references >>

• UNISYS ClearPath HMP NX4800 and ClearPath A 2800 Level Delta Architecture Support Reference Manual. # 7012 6610-000 Unisys May1996. (Printed)

• UNISYS Libra Model 180 Architecture Support Reference Manual. # 6888 2141-000 January 2003. (CD-ROM)

• Computer Systems Organization, The B5700/B6700 Series. Elliott I Organick. Academic Press, 1973

• Stack Architecture.

• MCP 5.0 Symbol.

• Algol Compiler 5.0 Symbol.

This document is divided into these sections:

• MCP Compiler Interface.

• CodeFile Segment Zero.

• Minimum CodeFile Requirements. 

• CodeFile Execution.

• Passing Parameters to Programs.

• Dynamic Code Compilation.

• Segment Dictionary.

• Code Segment Descriptors.

• Stack Building Code.

• Software Control Word.

• Intrinsics.

• Single Precision Operands.

• Double Precision Operands.

• Single Dimension Arrays.

• Multi Dimension Arrays.

• Strings.

• String Arrays.

• Structure Block Type Descriptor.

• Structure Block Variables.

• Structure Block Arrays.

• Structure Block Reference.

• Server Library.

• Server Library EntryPoint.

• Connection Library.

• Connection Library EntryPoint

• Library Template and Library Directory.

• In Stack Arrays.

• On Fault.

• Epilog Procedure.

• Exception Procedure.

• Normal Try Statement.

• Limited Try Statement.

• Try Expression.

• ..

• ..

• Limits.

Initial Version : 1-Mar-2004
Last Edited : 01-Apr-2004