Appendix

A. Connector pin

assignments

 

 

 

 

 

 

 

 

 

 

 

 

Figure

19

 

(Page

3

of

3).

System Memory Connector Pin Assignments

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Pin

 

 

x64

Non-Parity

 

 

x72 ECC

Pin

 

x64

Non-Parity

 

x72 ECC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

56

 

 

DQ17

 

 

 

DQ17

140

 

DQ49

 

 

DQ49

 

 

 

 

 

 

 

 

 

 

 

 

 

 

57

 

 

DQ18

 

 

 

DQ18

141

 

DQ50

 

 

DQ50

 

 

 

 

 

 

 

 

 

 

 

 

 

 

58

 

 

DQ19

 

 

 

DQ19

142

 

DQ51

 

 

DQ51

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

59

 

 

VCC

 

 

 

 

VCC

143

 

VCC

 

 

VCC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

60

 

 

DQ20

 

 

 

 

DQ20

144

 

DQ52

 

 

DQ52

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

61

 

 

NC

 

 

 

 

NC

145

 

NC

 

 

NC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

62

 

 

NC

 

 

 

 

NC

146

 

NC

 

 

NC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

63

 

 

NC

 

 

 

 

CKE1

147

 

NC

 

 

NC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

64

 

 

VSS

 

 

 

 

VSS

148

 

VSS

 

 

VSS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

65

 

 

DQ21

 

 

 

DQ21

149

 

DQ53

 

 

DQ53

 

 

 

 

 

 

 

 

 

 

 

 

 

 

66

 

 

DQ22

 

 

 

DQ22

150

 

DQ54

 

 

DQ54

 

 

 

 

 

 

 

 

 

 

 

 

 

 

67

 

 

DQ23

 

 

 

DQ23

151

 

DQ55

 

 

DQ55

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

68

 

 

VSS

 

 

 

 

VSS

152

 

VSS

 

 

VSS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

69

 

 

DQ24

 

 

 

DQ24

153

 

DQ56

 

 

DQ56

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

70

 

 

DQ25

 

 

 

 

DQ25

154

 

DQ57

 

 

DQ57

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

71

 

 

DQ26

 

 

 

 

DQ26

155

 

DQ58

 

 

DQ58

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

72

 

 

DQ27

 

 

 

 

DQ27

156

 

DQ59

 

 

DQ59

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

73

 

 

VCC

 

 

 

 

VCC

157

 

VCC

 

 

VCC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

74

 

 

DQ28

 

 

 

 

DQ28

158

 

DQ60

 

 

DQ60

 

 

 

 

 

 

 

 

 

 

 

 

 

 

75

 

 

DQ29

 

 

 

 

DQ29

159

 

DQ61

 

DQ61

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

76

 

 

DQ30

 

 

 

 

DQ30

160

 

DQ62

 

 

DQ62

 

 

 

 

 

 

 

 

 

 

 

 

 

 

77

 

 

DQ31

 

 

 

DQ31

161

 

DQ63

 

 

DQ63

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

78

 

 

VSS

 

 

 

 

VSS

162

 

VSS

 

 

VSS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

79

 

 

CK2

 

 

 

 

CK2

163

 

CK3

 

 

CK3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

80

 

 

NC

 

 

 

 

NC

164

 

NC

 

 

NC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

81

 

 

NC

 

 

 

 

NC

165

 

SA0

 

 

SA0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

82

 

 

SDA

 

 

 

 

SDA

166

 

SA1

 

 

SA1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

83

 

 

SCL

 

 

 

 

SCL

167

 

SA2

 

 

SA2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

84

 

 

VCC

 

 

 

 

VCC

168

 

VCC

 

 

VCC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Figure

20

(Page

1

of

3).

System memory connector pin input/output

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Pin

 

 

Signal

 

Name

 

 

I/O

Pin

 

Signal

Name

 

I/O

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

 

 

GND

 

 

 

 

N/A

85

 

GND

 

 

N/A

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2

 

 

MD0

 

 

 

 

I/O

86

 

MD32

 

I/O

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3

 

 

MD1

 

 

 

 

I/O

87

 

MD33

 

I/O

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4

 

 

MD2

 

 

 

 

I/O

88

 

MD34

 

I/O

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

5

 

 

MD3

 

 

 

 

I/O

89

 

MD35

 

 

I/O

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

6

 

 

VDD

 

 

 

 

I/O

90

 

VDD

 

 

N/A

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

7

 

 

MD4

 

 

 

 

I/O

91

 

MD36

 

 

N/A

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

8

 

 

MD5

 

 

 

 

I/O

92

 

MD37

 

 

I/O

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

9

 

 

MD6

 

 

 

 

I/O

93

 

MD38

 

 

I/O

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

10

 

 

MD7

 

 

 

 

I/O

94

 

MD39

 

 

I/O

 

 

 

 

 

 

 

 

 

 

 

 

 

 

11

 

 

MD8

(PAR0)

 

 

I/O

95

 

MD40

 

 

I/O

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Appendix A. Connector pin assignments27

Page 35
Image 35
IBM 6278, 6288, 6268 manual Assignments, Connector pin, System memory connector pin input/output

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.