6947ch03.fm

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

 

 

 

PCHID numbers

 

 

I/O cage slot

 

 

 

 

 

 

1st I/O cage

2nd I/O cage

3rd I/O cage

 

 

 

 

 

 

 

 

12 (front)

1A0

- 1AF

3A0

- 3AF

5A0

- 5AF

 

 

 

 

 

 

 

13 (front)

1B0

- 1BF

3B0

- 3BF

5B0

- 5BF

 

 

 

 

 

 

 

15 (front)

1C0

- 1CF

3C0

- 3CF

5C0

- 5CF

 

 

 

 

 

 

 

16 (front)

1D0

- 1DF

3D0

- 3DF

5D0

- 5DF

 

 

 

 

 

 

 

17 (front)

1E0

- 1EF

3E0

- 3EF

5E0

- 5EF

 

 

 

 

 

 

 

18 (front)

1F0

- 1FF

3F0

- 3FF

5F0

- 5FF

 

 

 

 

 

 

 

19 (rear)

200

- 20F

400

- 40F

600

- 60F

 

 

 

 

 

 

 

20 (rear)

210

- 21F

410

- 41F

610

- 61F

 

 

 

 

 

 

 

21 (rear)

220

- 22F

420

- 42F

620

- 62F

 

 

 

 

 

 

 

22 (rear)

230

- 23F

430

- 43F

630

- 63F

 

 

 

 

 

 

 

24 (rear)

240

- 24F

440

- 44F

640

- 64F

 

 

 

 

 

 

 

25 (rear)

250

- 25F

450

- 45F

650

- 65F

 

 

 

 

 

 

 

26 (rear)

260

- 26F

460

- 46F

660

- 66F

 

 

 

 

 

 

 

27 (rear)

270

- 27F

470

- 47F

670

- 67F

 

 

 

 

 

 

 

29 (rear)

280

- 28F

480

- 48F

680

- 68F

 

 

 

 

 

 

 

30 (rear)

290

- 29F

490

- 49F

690

- 69F

 

 

 

 

 

 

 

31 (rear)

2A0

- 2AF

4A0

- 4AF

6A0

- 6AF

 

 

 

 

 

 

 

32 (rear)

2B0

- 2BF

4B0

- 4BF

6B0

- 6BF

 

 

 

 

 

 

 

Note that I/O cage slot numbers 05, 14, 23, and 28 are reserved for eSTI-M cards.

The PCHID number range from 000 to 0FF is reserved for ICB-4 links. As ICB-4 links are directly connected to a book, Table 3-6 shows the ICB-4 PCHID numbers range for each book.

Table 3-6 PCHID numbers for ICB-4 links

CEC cage book

PCHID numbers

 

 

0

010 - 01B

 

 

1

020 - 02B

 

 

2

030 - 03B

 

 

3

000 - 00B

 

 

Important: If the STI Rebalance feature (Feature Code 2400) is selected on a z990 server upgrade, the current ICB-4 PCHID numbers may change. This requires the corresponding update of the ICB-4 link definition in the z990 server I/O configuration.

The server’s PCHID Report has all installed PCHID numbers. At definition time, PCHIDs are assigned to Channel Path IDs (CHPIDs) using the CHPID Mapping Tool, or HCD/HCM, or

88IBM eServer zSeries 990 Technical Guide

Page 101 Page 103
Page 102
Image 102
IBM 990 manual CEC cage book Pchid numbers
Page 101 Page 103

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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