Assembler Language

Course: A1

Duration: 4 Days

Level: II

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Topics Covered In This Course

CONTROL SECTION

Source Code Definitions; Object Modules, and Load Modules
- Control Section Definition
- START Command Definition
- CSECT Command Definition
- Setting up Addressability in a Control Section
- USING Statement
- BASR Instruction (Branch and Save Register)
- Multiple Base Register Specifications
- MVC Move Character Instruction
- LA Load Address Instruction
- Symbolic Address
- Base Addressing
- Displacement Calculations
- Index Addressability
- MVS Move Immediate
- LITERALS
- EQUATES

DATA DEFINITIONS

Define Constant
- Binary
- Characters
- Hexadecimal
- Fixed Point
- Addressing
  - Operand Subfields, Length Attributes, Constant Alignment, Padding, Types, Duplication Factor Expressions, Bit length Modifier, Y CONS, A CONS, V CONS
- Define Storage

INSTRUCTION SET

CLC:
Compare Logical Character
B:
Branch Instruction Format
CLI:
Compare Logical Integer
STM:
Storage Multiple
IC:
Insert Character
STC:
Store Character
L:
Load
LH:
Load Halfword
LR:
Load Register
SH:
Subtract Halfword
ST:
Store
LTR:
Load and Test
DSECT:
Dummy Section

How to Define a Dummy Section.
What a Dummy Section Is.
How to Use a Dummy Section.

DAY 1 WORKSHOP

Read Card Input Until Last Card, then Output Cards
- OS/390:
- I/O Needs
- DOS:
- I/O Needs
- C:
- Compare Function
- CH:
- Compare Halfword
- CR:
- Compare Register
- BCT:
- Branch on Count
- BCTR:
- Branch on Count Register
- BAL:
- Branch and Link
BINARY CONVERSION
- PACK:
- Pack
- CVB:
- Convert to Binary
- CVD:
- Convert to Decimal
- UNPK:
- Unpack
BINARY ARITHMETIC
- AR:
- Add Register
- A:
- Add Instruction
- AH:
- Add Halfword
- SR:
- Subtract Register
- SH:
- Subtract Halfword
- MH:
- Multiply Halfword
- M:
- Multiply
- D:
- Divide
- DR:
- Divide Register

DAY 2 WORKSHOP

Sort Data Using A Bubble Sort
DECIMAL ARITHMETIC
- AP:
- Add Decimal
- CP:
- Compare Decimal
- DP:
- Divide Decimal
- ED:
- Edit
- EDMK:
- Edit and Mark
- MP:
- Multiply Decimal
- SRP:
- Shift and Round Decimal
- SP:
- Subtract Decimal
- ZAP:
- Zero and ADD

DAY 3 WORKSHOP

Binary Arithmetic
LINKAGE INSTRUCTIONS
- BAS/BASR:
- Branch and Save Register
DAY 4 WORKSHOP
- Packed Arithmetic

What You Can Expect

Develop a better understanding of the machine and how it processes instructions.
Develop the skills to write assembler programs, particularly those small functions which will increase efficiency of their corporation's computing throughput.
Gain a practical introduction to the essential operating system interfaces with Assembler.
Enhance their diagnostic skills.
Improve their dump analysis skills.

Who Should Take This Course

New System Programmers, Technical Support and Software Programmers and Application Programmers who need the ability to write and debug Assembler Language programs and better understand the software that their installation uses.

Recommended Prerequisites

Knowledge of the internal organization and operation of the system/ 370 series including 43xx and 30xx machines and hexadecimal arithmetic is recommended. Previous Programming experience recommended.

Training Style

This class is taught by lecture with hands-on workshops

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Related Courses

Code	Course Title	Duration	Level
A2	Advanced Assembler Language	4 Days	III	Details

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