What is a midrange system?
For this book, we consider IBM POWER-based systems to be midrange systems. There are other legacy systems such as Solaris and HP-UX that some may also consider to be midrange systems. However, we will cover those in Chapter 4.
IBM POWER systems use a high-performance computer chip and are the latest generation of big-endian hardware that power the iSeries (also known as AS/400) and AIX (IBM’s Unix variant) operating systems. POWER systems share some characteristics with the IBM zSeries hardware, such as the ability to be partitioned in logical partitions (LPARs), run big-endian bit ordering, and use Extended Binary Coded Decimal Interchange Code (EBCDIC) encoding. A single POWER platform can run LPARs with both iSeries and AIX. Finally, it’s important to understand that applications developed for POWER operating systems are not compatible with x86-based hardware. This means that some type of transformation will be necessary...