The Maintenance and Migration of Assembler Systems

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Software Migrations Limited

The Assembler People
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Contact Information

• Software Migrations LTD
• Website www.smltd.com
• Richard Kelly
• Account Manager
• Tel [phone]
• Email bob.jenkins_at_smltd.com

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SML

• Assembler solutions.
• Unveiling system complexity.
• Regain control of the application.
• Turns an IT issue into a business benefit.
• Crucial piece of the modernization jigsaw.

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SML and product - History
SML launched as specialists in comprehension/migra
tion
2006/7
SML re-born focussed on Assembler Migration
Solutions
2003/4
FermaT Workbench Software
Maintenance Migration
Late 90s
Migration projects to validate core research
Early 90s
Core technology research (WSL, transformation
theory)
Mid 80s
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The Assembler Language
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SML Product Set

• Audit and Discovery
• Productivity FermaT Workbench
• Modernisation

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The SML Solution
The FermaT Architecture
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Audit and Discovery

• Provides detailed information on the Assembler
  systems make-up.
• Components
• Modules
• macros
• Copybooks
• Size
• Complexity
• Extended to include SML complexity analysis.

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SML Complexity Analysis
Complexity
System Complexity
Standard
Interesting
Clever
High Risk
Instruction Complexity
Always Easy instructions
Dont want too many
Difficult
Why?
Load address Add Compare Branch
Channel command Word Addressing Mode Control
Section (CSECT) Dummy Section (DSECT)
Start Sub-channel Load Access Registers Insert
Address space Control
Invalid Page Table Entries Move with Destination
Key Signal Processor
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Assembler Estate Audit

• Designed to baseline the system.
• Support strategic direction

• Support budgeting and risk assessments.
• Concentrate resources and efforts.

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FermaT Workbench

• Rich set of Integrated tools
• Comprehension
• Documentation
• Data Definitions
• Complexity Metrics
• Change Assessments
• Impact Analysis
• Knowledge sharing
• Business Rules extraction

Specifically designed to meet the challenges of
Assembler systems maintenance and provide
complete system knowledge
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FermaT Workbench Benefits

• Full and accurate documentation of system - as it
  is today.
• Improve comprehension and learning curve.
• Impact analysis risk reduction.
• Accurate information required to estimate change
  effort.
• Increased control, productivity and
  sustainability.
• Increase transparency of program processes as an
  aid to corporate compliance.

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Workbench Call Graph
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Workbench Editor and Flowchart
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Workbench - Reports
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Technical Overview of Modernisation Technology
Translate
RAW WSL
Initial Transformation
Assm
RAW WSL
Restructured WSL
Data Definitions
Data Restructuring
Define Output Target Standards
AssemblerMacro Trans-lation
Target Source
Global Variable Replacement
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The FermaT Modernisation Service

• Code can be quickly generated and remediated.
• Reduced effort and risk over alternative methods.
• Functional equivalence.
• Restructured and maintainable.
• Removes a long standing headache. Regains control
  of the system and turns an IT issue into a
  business benefit.

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SML Product Set

• Audit and Discovery
• Productivity FermaT Workbench
• Modernisation
• SML The Assembler People

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SML

• Questions