Appendix

A. Connector

pin

assignments

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Figure

23

(Page

2

of

2).

 

IDE connector pin assignments

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Pin

 

 

Signal

 

 

 

 

 

 

I/O

Pin

 

Signal

 

 

 

 

I/O

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

15

 

 

Data

bus

bit

1

 

 

I/O

35

 

SA0

 

 

 

 

O

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

16

 

 

Data

bus

bit

14

 

I/O

36

 

SA2

 

 

 

 

O

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

17

 

 

Data

bus

bit

0

 

 

I/O

37

 

CS0#

 

 

 

 

O

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

18

 

 

Data

bus

bit

15

 

I/O

38

 

CS1

 

 

 

 

O

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

19

 

 

Ground

 

 

 

 

NA

39

 

Active#

 

 

 

I

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

20

 

 

Key

 

(Reserved)

 

 

NA

40

 

Ground

 

 

 

 

NA

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Diskette

drive

connector

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Figure

24.

Diskette Drive Connector Pin Assignments

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Pin

 

 

Signal

 

 

 

 

 

 

I/O

Pin

 

Signal

 

 

 

 

I/O

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

 

 

Drive

2

installed #

I

2

 

High

density

select

O

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3

 

 

Not

connected

 

 

 

NA

4

 

Not connected

 

 

NA

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

5

 

 

Ground

 

 

 

 

NA

6

 

Data

rate 0

 

 

NA

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

7

 

 

Ground

 

 

 

 

NA

8

 

Index#

 

 

 

I

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

9

 

 

Reserved

 

 

 

 

NA

10

 

Motor

enable

0#

 

O

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

11

 

 

Ground

 

 

 

 

NA

12

 

Drive

select

1#

 

O

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

13

 

 

Ground

 

 

 

 

NA

14

 

Drive

select

0#

 

O

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

15

 

 

Ground

 

 

 

 

NA

16

 

Motor

enable

1#

 

O

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

17

 

 

MSEN1

 

 

 

 

 

 

I

18

 

Direction

in#

 

 

O

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

19

 

 

Ground

 

 

 

 

NA

20

 

Step#

 

 

 

 

O

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

21

 

 

Ground

 

 

 

 

NA

22

 

Write

data#

 

 

O

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

23

 

 

Ground

 

 

 

 

NA

24

 

Write

enable#

 

 

O

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

25

 

 

Ground

 

 

 

 

NA

26

 

Track0#

 

 

 

 

I

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

27

 

 

MSEN0

 

 

 

 

 

 

I

28

 

Write

protect#

 

I

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

29

 

 

Ground

 

 

 

 

NA

30

 

Read

data#

 

 

I

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

31

 

 

Ground

 

 

 

 

NA

32

 

Head

1

select#

 

O

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

33

 

 

Data

rate 1

 

 

 

NA

34

 

Diskette

change#

 

I

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Power

supply

connector

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Figure

25

(Page

1

of

2).

 

Power Supply Connector Pin Assignments

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Pin

 

 

 

 

 

Signal

Name

 

 

 

Pin

 

 

Signal

Name

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

 

 

 

 

 

+3.3

V

 

11

 

 

 

+3.3

V

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2

 

 

 

 

 

+3.3

V

 

12

 

 

 

12 V

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3

 

 

 

 

 

Ground

 

 

 

13

 

 

 

Ground

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4

 

 

 

 

 

+5

V

 

 

 

14

 

 

 

ON/OFF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

5

 

 

 

 

 

Ground

 

 

 

15

 

 

 

Ground

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

6

 

 

 

 

 

+5

V

 

 

 

16

 

 

 

Ground

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

7

 

 

 

 

 

Ground

 

 

 

17

 

 

 

Ground

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

8

 

 

 

 

 

PWR

GOOD

 

18

 

 

 

Reserved

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

32 Technical Information Manual

Page 40
Image 40
IBM 6268, 6288, 6278 manual Supply, Diskette Drive Connector Pin Assignments

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.