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APPENDICES
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Appendix-3 Technical Terms
AC’97
AC’97 is a device designed to include a digital processor for modem and an
audio CODEC for analog I/O. These two parts are linked together by AC’97
link bus. Putting the digital processor into the main system chipset will reduce
the cost of sound/modem onboard solution.
ACPI (Advanced Configuration & Power Interface)
ACPI is developed together by Intel, Microsoft and Toshiba. This interface
provides a channel of management of the PC system and its hardware such
as CPU and BIOS, pushing the PC power management to
a more advanced and user-friendly level.
AGP (Accelerated Graphic Port)
AGP is a bus interface targeted for high-performance 3D graphics. AGP
takes advantage of both rising and falling edge of the 66MHz clock. For 2X
AGP, the data transfer rate is 66MHz x 4byte x 2 = 528MB/s. AGP
4X mode is 66MHz x 4byte x 4 = 1056MB/s.
AMR (Audio/Modem Riser)
AMR is an interface to connect the CODEC circuit of AC’97 sound/modem
solution to the mainboard through an AMR card and an AMR connector.
APM (Advanced Power Management)
APM is developed by Intel and Microsoft , intending for PC power
management through the system BIOS. Through APM, the PC power
consumption can be reduced to 5W or lower.
ATA (AT Attachment), ATA/66, ATA/100
ATA is the specification of disk drive interface, that integrates the controller
on the disk drive itself with the IDE technology.
ATA/66 uses both rising edge and falling edge to provide a data
transfer rate 16.6MB/s x4 = 66MB/s. To use ATA/66, you need
special ATA/66 IDE cable.
ATA/100 also uses both rising edge and falling edge as ATA/66,
but clock cycle time is reduced to 40ns. The data transfer rate is
(1/40ns) x 2 bytes x 2 = 100MB/s. To use ATA/100, you need
special 80-wire IDE cable, the same as ATA/66.