Draft Document for Review April 7, 2004 6:15 pm

6947ch06.fm

30 logical partitions and two LCSSs. Support to further exploit z990 functions will be delivered as an Open Source Contribution via:

http://www.software.ibm.com/developerworks/opensource/linux390

Commercial distributions of Linux on zSeries are available from Linux distributors, such as Red Hat, SUSE, and TurboLinux. To learn more about distributor offerings, contact these distributors through their representatives or through the following Web sites:

￿Red Hat http://www.redhat.com

￿SUSE http://www.suse.com

￿Turbolinux http://www.turbolinux.com

z990 Exploitation support is also delivered by Developer Works. For details regarding functions that are not yet available via distributor offerings, information on Linux support for FCP, VLAN, IPv6, SNMP, TCP/IP Broadcast, Query ARP, and Purge ARP, refer to:

http://www.ibm.com/developerworks

For Linux support, visit the Web site:

http://www.software.ibm.com/developerworks/opensource/linux390

6.7 Summary of software requirements

The following tables provide summaries of software requirements for z990 functions and features. Software requirements for the Cryptographic functions of the z990 are found in Cryptography, paragraph “Software requirements” on page 129.

6.7.1 Summary of z/OS and OS/390 software requirements

Table 6-2 Minimum z/OS and OS/390 Software Requirements

Software Requirements

z/OS

z/OS

z/OS

z/OS

z/OS

OS/390

 

V1.6 a

V1.5

V1.4

V1.3

V1.2

V2.10

Functions

 

 

Exploit

 

 

 

 

 

 

 

 

 

 

16 to 30 logical partitions

X

X

X

 

 

 

 

 

 

 

 

 

 

Two Logical Channel Subsystems (LCSSs)

X

X

X

 

 

 

 

 

 

 

 

 

 

Four Logical Channel Subsystems (LCSSs)

X

Xb

Xb

 

 

 

Dynamic I/O support for multiple LCSSs

X

X

X

 

 

 

 

 

 

 

 

 

 

Dynamic Add/Delete Logical Partition Name

X

 

 

 

 

 

 

 

 

 

 

 

 

Extended Translation Facility

X

 

 

 

 

 

 

 

 

 

 

 

 

zSeries Application Assist Processor (zAAP)

Xc

 

 

 

 

 

24 processors within a single logical partition

X

 

 

 

 

 

 

 

 

 

 

 

 

Internal spanned channels

X

X

X

X

X

 

 

 

 

 

 

 

 

External spanned channels

X

X

X

 

 

 

 

 

 

 

 

 

 

Chapter 6. Software support 147

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IBM 990 manual Summary of software requirements, Summary of z/OS and OS/390 software requirements, V1.4
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990 specifications

The IBM 990 series, often referred to in the context of IBM's pioneering efforts in the realm of mainframe computing, represents a unique chapter in the history of information technology. Introduced in the late 1960s, the IBM 990 series was designed as a powerful tool for enterprise-level data processing and scientific calculations, showcasing the company's commitment to advancing computing capabilities.

One of the main features of the IBM 990 was its architecture, which was built to support a wide range of applications, from business processing to complex scientific computations. The system employed a 32-bit word length, which was advanced for its time, allowing for more flexible and efficient data handling. CPUs in the IBM 990 series supported multiple instructions per cycle, which contributed significantly to the overall efficiency and processing power of the machines.

The technology behind the IBM 990 was also notable for its use of solid-state technology. This provided a shift away from vacuum tube systems that were prevalent in earlier computing systems, enhancing the reliability and longevity of the hardware. The IBM 990 series utilized core memory, which was faster and more reliable than the magnetic drum memory systems that had been standard up to that point.

Another defining characteristic of the IBM 990 was its extensibility. Organizations could configure the machine to suit their specific needs by adding memory, storage, and peripheral devices as required. This modular approach facilitated the growth of systems alongside the technological and operational demands of the business environments they served.

In terms of software, the IBM 990 series was compatible with a variety of operating systems and programming environments, including FORTRAN and COBOL, enabling users to access a broader array of applications. This versatility was a significant advantage, making the IBM 990 an appealing choice for educational institutions, research facilities, and enterprises alike.

Moreover, the IBM 990 was engineered to support multiprocessing, which allowed multiple processes to run simultaneously, further increasing its effectiveness in tackling complex computing tasks.

In summary, the IBM 990 series represents a significant advancement in computing technology during the late 20th century. With a robust architecture, versatile configuration options, and a focus on solid-state technology, the IBM 990 facilitated substantial improvements in data processing capabilities, making it a cornerstone for many businesses and academic institutions of its time. Its impact can still be seen today in the continued evolution of mainframe computing.
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