IBM PC 300PL List Bus Mastering Support For Fast Performance 64-bit 125, Resource Assignment

Chapter 2. System board features

The video subsystem supports all video graphics array (VGA) modes and is compliant with graphics array (SVGA) modes and Video Electronics Standards Association (VESA) 1.2. Some e features include:

Ÿ

Video

subsystem on a

chip,

including

2D,

3D,

and a video port

Ÿ

66 MHz AGP system bus interface with

2X

or 4X mode

Ÿ

Sideband signaling (some models only)

Ÿ

Command

list

bus

mastering

support

for

fast

2D

performance

Ÿ

64-bit,

125

MHz

SDRAM

or

166

MHz

SGRAM

interface

Ÿ

Plug and

Play support

Ÿ

Advanced

Power

Management

support

Ÿ

Color

space

conversion

ŸHardware scaling

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)

VGA

registers: Attributes 0–14, CRT controller 0–18/22/24/26,

CRTC

Extension

0-6, DACSTAT,

FEAT, GCTL

0-8,

INSTS0-1, MISC, Sequencer 0-4, DAC

IRQ

PCI

interrupt 1 (automatically assigned to

IRQ

0BH by POST

or

can be

disabled in

the Configu

Utility)

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.

The PC 300PL Personal Computer supports the following video subsystem modes:

8 Technical Information Manual