z/OS Assembler for Applications Programmers

Recommended Duration:
2 Days
Version
High-Level Assembler (HLASM)
for MVS & VM with z/OS improvements.
Benefits
Students who complete this course will be able to write or maintain Assembler programs that use hardware instructions introduced with z/Architecture and related techniques introduced with z/OS.
Audience
Experienced Assembler programmers needing to update their knowledge to include hardware and Assembler instructions and techniques that have become available with z/Architecture and z/OS. Systems programmers may also benefit from this course as a first exposure to the new hardware and software.
Prerequisites
Experience writing or maintaining Assembler applications; knowledge of predecessor capabilities such as covered in course OS/390 Assembler Language: Update.
Major Topics
  • z/Architecture overview
  • z/OS overview
  • Linkage and AMODE issues
  • Register management: preserving left hand word values
  • Register management: working with 64-bit values and 32-bit values
  • Packed decimal changes: TP
  • Packed decimal changes: ASCII and Unicode input and output
  • Packed decimal changes: converting between packed decimal and 64-bit integer
  • Binary arithmetic: halfword, fullword, doubleword data
  • Binary arithmetic: arbitrarily long binary numbers
  • Boolean instructions in 64-bit form
  • Shifting and rotating bits in registers
  • Working with data in ASCII
  • Introduction to Unicode
  • Working with data in Unicode
  • Floating point, as it relates to interlanguage communication
  • V1.2 facilities; IARV64
  • The Dead Zone
  • V1.3 update: AMODE64 programs
  • V1.4 update: new cell pool macros
  • z990 instruction set
  • z/OS V1.5 and HLASM V1.5
Exercises
There are eight hands-on exercises; five of them demonstrate using Assembler to generate HTML files from EBCDIC, ASCII, or Unicode inputs.