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60
ACPI
(
A
dvanced
C
onfiguration and
P
ower
I
nterface) is a power management specifica-
tion that allows the operating system to control the amount of power distributed to the
computer’s devices. Devices not in use can be turned off, reducing unnecessary power
expenditure.
AGP
(
A
ccelerated
G
raphics
P
ort) is a PCI-based interface which was designed
specifically for demands of 3D graphics applications. The 32-bit AGP channel directly
links the graphics controller to the main memory. While the channel runs at only
66MHz, it supports data transmission during both the rising and falling ends of the
clock cycle, yielding an effective speed of 133MHz.
AMR
(
A
udio
M
odem
R
iser) is a modem that can be used on Intel Reference
Motherboard platforms using Intel’s core logic chipsets supporting AC-Link 2.1 It
supports fax and all data feeback modes. It provides high speed communicstions
between your perosn al computer and a remote location, such as an Internet Service
Provider (ISP)
AT
was the original form factor of IBM’s PC.
ATAPI
(
AT A
ttachment
P
acket
I
nterface), also known as IDE or ATA, is a drive
implementation that includes the disk controller on the device itself. It allows CD-
ROMs and tape drives to be configured as master or slave devices, just like hard drives.
ATX
form factor was designed to replace the AT form factor. It improves on the AT
design by rotating the board ninety degrees, so that the IDE connectors are closer to the
drive bays, and the CPU is closer to the power supply and cooling fan. The keyboard,
mouse, serial, USB, and parallel ports are built in.
Appendix
Glossary
Appendix
Glossary
