Introduction

R

Term

Description

 

 

GART

Graphics Aperture Re-map Table. This table contains the page re-map information used

 

during AGP aperture address translations.

 

 

GTLB

Graphics Translation Look-aside Buffer. A cache used to store frequently used GART

 

entries.

 

 

UP

Uni-Processor.

 

 

DBI

Dynamic Bus inversion.

 

 

MSI

Message Signaled Interrupts. MSIs allow a device to request interrupt service via a

 

standard memory write transaction instead of through a hardware signal.

 

 

IPI

Inter Processor Interrupt.

 

 

SDR

Single Data-Rate SDRAM memory.

 

 

Table 2. Data Type Notation

Data Type

Size

 

 

bit (b)

Smallest unit, 0 or 1

 

 

byte

8 bits

 

 

word

16 bits = 2 bytes

 

 

DWord (DW)

Doubleword: 32 bits = 4 bytes

 

 

QWord (QW)

Quadword: 8 bytes = 4 words

 

 

DQWord (DQW)

Double Quadword. 16 bytes or 8 words. This is sometimes

 

referred to as a Superword (SW or SWord), and is also

 

referred to as a “Cache Line”.

 

 

Kilobyte (KB)

1024 bytes

 

 

Megabit (Mb)

1, 048,576 bits = 128 KB

 

 

Megabyte (MB)

1,048,576 bytes = 1024 KB

 

 

Gigabit (Gb)

1024 Mb

 

 

Gigabyte (GB)

1024 MB

 

 

Table 3. Number Format Notation

Number Format

Notation

Example

 

 

 

Decimal (default)

 

14

 

 

 

Binary

b

1110b

 

 

 

Hex

h

0Eh

 

 

 

12

Intel® 82845 MCH for SDR Datasheet

Page 12
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Intel 845 manual Data Type Notation, Data Type Size, Number Format Notation Example