Chapter 2. System board features

Video subsystem

The video subsystem includes the Intel 810 graphics controller integrated in the Graphi Controller Hub (GMCH) and 4MB of 100MHz local graphics display cache SDRAM.

Graphics memory controller hub (Super Video Graphics Array)

The video subsystem uses system memory for display buffer, commands, and 3D textures AGP-enabled operating systems via Dynamic Video Memory Technology (DVMT). The Intel 810 gra controller drivers will adjust the memory footprint depending on available system memory, resolution, and presence of the display cache local memory. DVMT employs direct AGP and arbitration to dynamically allocate and deallocate memory for textures for applications texture memory.

The operating system requires allocation of up to 1MB of system memory to support lega properties will display up to 1MB less than physical system memory available to the ope

The integrated graphics memory controller hub supports all video graphics array (VGA) mo compliant with super video graphics array (SVGA) modes and Video Electronics Standards As (VESA) 1.2. Some of the features are:

Ÿ

2D and 3D hardware acceleration with hardware cursor

Ÿ

Integrated 230 MHz RAMDAC for

up to 1600x1200 at 85Hz resolution

Ÿ

Hardware Motion Compensation via Intel HWMC Software Development Kit

Ÿ

Advanced

Power

Management

(APM)

 

 

Ÿ

Advanced

Configuration

and

Power

Interface

(ACPI)

Ÿ

On

Now

(Suspend

to RAM)

 

 

 

Ÿ

Plug

and

Play

 

 

 

 

 

Ÿ

VESA Display Data Channel version

DDC2B

 

Ÿ

GDI,

Direct X, and

OpenGL v1.1 Application

Programming Interfaces

The integrated graphics memory controller subsystem supports the VESA Display Data Channel standard 1.1 and uses DDC1 and DDC2B to determine optimal values during automatic monito

The video subsystem has the following resource assignments:

Figure 2.

Video subsystem resources

 

 

 

 

 

 

 

 

 

 

 

 

Resource

Assignment

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ROM

(hex)

C0000–C7FFF (32KB)

 

 

 

 

 

 

RAM

(hex)

A0000–BFFFF

 

 

 

 

 

 

I/O

(hex)

3B0–3BB, 3C0–3DF

 

 

 

 

 

IRQ

 

PCI

interrupt

#A

(default assigned to ISA

IRQ #1)

 

DMA

 

None

 

 

 

 

 

 

 

For further

information

on

resource

assignments,

see

Appendix B, “System address maps” on

and

Appendix C,

“IRQ and

DMA channel

assignments”

on

page 40.

6 Technical Information Manual

Page 14
Image 14
IBM 6278, 6288, 6268 manual Video subsystem, Graphics memory controller hub Super Video Graphics Array, Apm, Acpi, DDC2B GDI

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.