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

6947ch03.fm

–Optica Technologies 34600 FXBT ESCON Converter. For more information, check the Optica Technologies Web site:

http://www.opticatech.com/34600.asp

￿ESCON 4-port channel cards (z900 FC 2313)

ESCON 4-port channel cards are not offered as a new build option and are replaced with new 16-Port ESCON cards (FC 2323) during an upgrade from z900.

The 16-Port ESCON card has MT-RJ connectors.

￿FICON channel cards (pre-FICON Express) (z900 FC 2315 and FC 2318)

FICON channel cards (FC 2315 and FC 2318), the original pre-FICON Express cards, are not offered as a new build option and are replaced with new FICON Express cards

(FC 2319 or FC 2320) during an upgrade from z900. The FICON Express cards have LC Duplex connectors.

￿OSA-2 adapter cards (z900 FC 5201 and FC 5202)

The OSA-2 Token Ring (z900’s FC 5201) and OSA-2 Fiber Distributed Data Interface (FDDI) (z900’s FC 5202) features are not offered as a new build option and are not offered on an upgrade from z900.

For Token Ring connectivity, use the equivalent OSA-Express adapter.

If FDDI connectivity is still desired, a multiprotocol switch or router with the appropriate network interface (for example, 1000BASE-T Ethernet, Gigabit Ethernet) can be used to provide connectivity between the z990 server and a FDDI LAN, via an OSA-Express adapter.

￿OSA-Express ATM adapters (z900’s FC 2362 and FC 2363)

The OSA-Express Asynchronous Transfer Mode (ATM) features are not offered as a new build option and are not offered on an upgrade from z900.

If ATM connectivity is still desired, a multiprotocol switch or router with the appropriate network interface (for example, 1000BASE-T Ethernet, Gigabit Ethernet) can be used to provide connectivity between the z990 server and an ATM LAN, via an OSA-Express adapter.

3.3.2Cryptographic feature cards

Table 3-4gives a summary of all cryptographic feature cards that are supported on z990 servers.

Table 3-4 Cryptographic feature cards

Cryptographic card types

Feature Codes (FC)

 

 

PCIXCC

0868

 

 

PCICA

0862

 

 

Cryptographic feature card no longer supported

The following cryptographic feature card is no longer supported on z990 servers:

￿PCI Cryptographic Coprocessor (PCICC) (z900’s FC 0861)

The PCI Cryptographic Coprocessor (PCICC) (FC 0861) is replaced with the PCIX Cryptographic Coprocessor (PCIXCC) (FC 0868) and the CMOS Cryptographic Coprocessor Facility that were offered on z900. In addition, functions from the

Chapter 3. I/O system structure

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IBM 990 manual Cryptographic feature cards, Cryptographic feature card no longer supported
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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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