Appendix

B.

System

address

maps

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Figure 34 (Page

2 of

3).

I/O address map

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Address

(Hex)

 

 

Size

 

 

Description

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0080

 

 

 

1

 

byte

 

POST checkpoint register during POST only

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

008F

 

 

 

1

 

byte

 

Refresh

 

page

register

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0080–008F

 

 

16

 

bytes

 

ICH1, DMA

page

registers

 

 

 

 

 

 

 

 

 

 

 

 

 

0090–0091

 

 

15

 

bytes

 

General

I/O

 

locations — available to PCI bus

 

 

 

 

 

 

 

 

 

 

 

 

 

0092

 

 

 

1

 

byte

 

PS/2

keyboard

controller

registers

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0093–009F

 

 

15

 

bytes

 

General

I/O

 

locations

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

00A0–00A1

 

 

2

bytes

 

Interrupt

controller

2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

00A2–00BF

 

 

30

 

bytes

 

APM

control

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

00C0–00DF

 

 

31

bytes

 

DMA

2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

00E0–00EF

 

 

16

 

bytes

 

General

I/O

 

locations — available to PCI bus

 

 

 

 

 

 

 

 

 

 

 

 

 

00F0

 

 

 

1

 

byte

 

BX,

Coprocessor

Error

Register

 

 

 

 

 

 

 

 

00F1–016F

 

 

127

bytes

 

General I/O locations — available to PCI bus

 

 

 

 

 

 

 

 

 

 

 

 

 

0170–0177

 

 

8

bytes

 

Secondary

IDE

channel

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

01F0–01F7

 

 

8

bytes

 

Primary

IDE

channel

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0200–0207

 

 

8

bytes

 

Available

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0220–0227

 

 

8

bytes

 

SMC 37C673, Serial port 3 or 4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0228–0277

 

 

80

bytes

 

General

I/O

 

locations

available

to PCI bus

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0278–027F

 

 

8

bytes

 

SMC

27C673,

LPT3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0280–02E7

 

 

102

bytes

 

Available

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

02E8–02EF

 

 

8

bytes

 

SMC

PC37C673,

Serial port

3

or

4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

02F8–02FF

 

 

8

bytes

 

COM2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0338–033F

 

 

8

bytes

 

SMC PC37C673, Serial port 3 or 4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0340–036F

 

 

48

 

bytes

 

Available

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0372–0375

 

 

4

bytes

 

Available

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0376–0377

 

 

2

bytes

 

IDE

channel

1

command

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0378–037F

 

 

8

bytes

 

LPT2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0380–03B3

 

 

52

 

bytes

 

Available

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

03B4–03B7

 

 

4

bytes

 

Video

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

03BA

 

 

 

1

 

byte

 

Video

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

03BC–03BE

 

 

16

 

bytes

 

LPT1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

03C0–03CF

 

 

16

 

bytes

 

Video

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

03D4–03D7

 

 

4

bytes

 

Video

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

03DA

 

 

 

1

 

byte

 

Video

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

03D0–03DF

 

 

11

bytes

 

Available

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

03E0–03E7

 

 

8

bytes

 

Available

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

03E8–03EF

 

 

8

bytes

 

COM3

or

COM4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

03F0–03F5

 

 

6

bytes

 

Diskette

 

channel

1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

03F6

 

 

 

1

 

byte

 

Primary IDE channel command port

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

03F7

(Write)

 

1

 

byte

 

Diskette

 

channel

1

command

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

03F7,

bit

7

 

1

 

bit

 

Diskette

 

disk

change

channel

 

 

 

 

 

 

 

 

 

 

 

 

 

 

03F7,

bits

6:0

 

7

bits

 

Primary

IDE

channel

status port

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

03F8–03FF

 

 

8

bytes

 

COM1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0400–047F

 

 

128

bytes

 

Available

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Appendix B. System address maps37

Page 45
Image 45
IBM 6288, 6268, 6278 manual Maps, ICH1, DMA

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.