Appendix

A. Connector

pin

assignments

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Figure

22 (Page

2

of

3).

PCI connector pin assignments

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Pin

 

Signal

 

 

 

 

I/O

Pin

Signal

 

 

 

 

I/O

 

 

 

 

 

 

 

 

 

 

 

 

A2

 

+12 V DC

 

NA

B2

TCK

 

 

 

 

O

 

 

 

 

 

 

 

 

 

 

 

 

 

A3

 

TMS

 

 

 

 

O

B3

Ground

 

 

NA

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A4

 

TDI

 

 

 

 

O

B4

TDO

 

 

 

 

I

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A5

 

+5

V

DC

 

 

NA

B5

+5

V

DC

 

 

NA

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A6

 

INTA#

 

 

 

I

B6

+5

V

DC

 

 

NA

 

 

 

 

 

 

 

 

 

 

 

 

 

A7

 

INTC#

 

 

 

I

B7

INTB#

 

 

 

I

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A8

 

+5

V

DC

 

 

NA

B8

INTD#

 

 

 

I

 

 

 

 

 

 

 

 

 

 

 

A9

 

Reserved

 

 

NA

B9

PRSNT1#

 

 

I

 

 

 

 

 

 

 

 

 

A10

 

+5 V DC (I/O)

NA

B10

Reserved

 

 

NA

 

 

 

 

 

 

 

 

 

 

 

 

A11

 

Reserved

 

 

NA

B11

PRSNT2

 

 

 

I

 

 

 

 

 

 

 

 

 

 

 

 

A12

 

Ground

 

 

 

NA

B12

Ground

 

 

NA

 

 

 

 

 

 

 

 

 

 

 

 

A13

 

Ground

 

 

 

NA

B13

Ground

 

 

NA

 

 

 

 

 

 

 

 

 

 

 

A14

 

+3.3V

AUX

 

NA

B14

Reserved

 

 

NA

 

 

 

 

 

 

 

 

 

 

 

 

 

A15

 

RST#

 

 

 

 

O

B15

Ground

 

 

NA

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A16

 

+5

V

DC

(I/O)

NA

B16

CLK

 

 

 

 

O

 

 

 

 

 

 

 

 

 

 

 

 

 

A17

 

GNT#

 

 

 

 

O

B17

Ground

 

 

NA

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A18

 

Ground

 

 

 

NA

B18

REQ#

 

 

 

 

I

 

 

 

 

 

 

 

 

 

 

A19

 

PCIPME

 

 

 

NA

B19

+5 V DC (I/O)

NA

 

 

 

 

 

 

 

 

 

A20

 

Address/Data

30

I/O

B20

Address/Data

31

I/O

 

 

 

 

 

 

 

 

 

 

 

A21

 

+3.3

V

DC

 

NA

B21

Address/Data

29

I/O

 

 

 

 

 

 

 

 

 

 

A22

 

Address/Data

28

I/O

B22

Ground

 

 

NA

 

 

 

 

 

 

 

 

 

A23

 

Address/Data

26

I/O

B23

Address/Data

27

I/O

 

 

 

 

 

 

 

 

 

 

 

A24

 

Ground

 

 

 

I/O

B24

Address/Data

25

NA

 

 

 

 

 

 

 

 

 

 

 

A25

 

Address/Data

24

I/O

B25

+3.3

V

DC

 

NA

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A26

 

IDSEL

 

 

 

O

B26

C/BE

 

3#

 

 

I/O

 

 

 

 

 

 

 

 

 

 

 

A27

 

+3.3

V

DC

 

NA

B27

Address/Data

23

I/O

 

 

 

 

 

 

 

 

 

 

A28

 

Address/Data

22

I/O

B28

Ground

 

 

NA

 

 

 

 

 

 

 

 

 

A29

 

Address/Data

20

I/O

B29

Address/Data

21

I/O

 

 

 

 

 

 

 

 

 

 

 

A30

 

Ground

 

 

 

I/O

B30

Address/Data

19

NA

 

 

 

 

 

 

 

 

 

 

 

A31

 

Address/Data

18

I/O

B31

+3.3

V

DC

 

NA

 

 

 

 

 

 

 

 

 

A32

 

Address/Data

16

I/O

B32

Address/Data

17

I/O

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A33

 

+3.3

V

DC

 

NA

B33

C/BE

 

2#

 

 

I/O

 

 

 

 

 

 

 

 

 

 

 

 

A34

 

FRAME#

 

 

 

I/O

B34

Ground

 

 

NA

 

 

 

 

 

 

 

 

 

 

 

 

A35

 

Ground

 

 

 

NA

B35

IRDY#

 

 

I/O

 

 

 

 

 

 

 

 

 

 

 

 

 

A36

 

TRDY#

 

 

 

I/O

B36

+3.3

V

DC

 

NA

 

 

 

 

 

 

 

 

 

 

 

 

 

A37

 

Ground

 

 

 

NA

B37

DEVSEL#

 

 

 

I/O

 

 

 

 

 

 

 

 

 

 

 

 

 

A38

 

STOP#

 

 

 

 

I/O

B38

Ground

 

 

NA

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A39

 

+3.3

V

DC

 

NA

B39

LOCK#

 

 

 

 

I/O

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A40

 

SDONE

 

 

 

 

I/O

B40

PERR#

 

 

 

I/O

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A41

 

SBO#

 

 

 

 

I/O

B41

+3.3

V

DC

 

NA

 

 

 

 

 

 

 

 

 

 

 

 

 

A42

 

Ground

 

 

 

NA

B42

SERR#

 

 

 

I/O

 

 

 

 

 

 

 

 

 

 

 

 

 

A43

 

+3.3

V

DC

 

NA

B43

+3.3

V

DC

 

NA

 

 

 

 

 

 

 

 

 

 

 

 

 

A44

 

C/BE(1)#

 

 

I/O

B44

C/BE

 

1#

 

 

I/O

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

30 Technical Information Manual

Page 38
Image 38
IBM 6278, 6288, 6268 manual Pin, Connector

6278, 6268, 6288 specifications

The IBM 6278, 6288, and 6268 are part of IBM's extensive lineup of mid-range computers, specifically tailored for business environments in the late 1980s and early 1990s. These systems were designed to handle substantial data processing tasks, facilitating efficient business operations with robust performance and reliability.

The IBM 6278 was notable for its high-performance capabilities, making it suitable for a variety of applications ranging from transaction processing to complex computations. One of the main features of the 6278 was its multiprocessing capability, which allowed it to run multiple tasks concurrently. This was achieved through a combination of advanced hardware and software that optimized performance and resource allocation.

Similarly, the IBM 6288 was recognized for its versatility and scalability. This system incorporated enhanced memory management and was capable of handling larger workloads than its predecessors. The 6288 was designed with user-friendly interfaces and supported various input/output devices, making it easier for organizations to integrate into existing IT infrastructures. Additionally, it provided improved connectivity options, essential for modern networking needs at the time.

The IBM 6268, on the other hand, offered a balance between cost and performance, appealing to smaller businesses or those with less intensive data processing requirements. Despite being less powerful than the 6278 and 6288, the 6268 still managed to include essential features such as reliable data storage, effective processing speed, and compatibility with IBM's extensive software ecosystem.

All three models utilized IBM's proprietary operating systems, which were well-known for their robustness and security features. They were built with technologies such as error detection and correction, ensuring the integrity of data processing tasks. The architecture of these systems also allowed for easy upgrades, enabling businesses to expand their capabilities without a complete overhaul of their IT infrastructure.

In summary, the IBM 6278, 6288, and 6268 represented a significant advancement in mid-range computing technology during their era. Their main features encompassed multiprocessing, scalability, and user-friendly interfaces, making them valuable assets for businesses seeking reliable and efficient computing solutions. These systems laid the groundwork for future innovations in business computing, and despite their age, they remain a significant part of IBM's legacy in the computing industry.