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Appendices
Appendix-2 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 to-
gether 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 in-
terface 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.
UATA (Ultra AT Attachment), ATA/66, ATA/100, ATA133
ATA is the specification of disk drive interface, that integrates the con-
troller on the disk drive itself with the IDE technology.
UATA/66 uses both rising edge and falling edge to provide a data trans-
fer rate 16.6MB/s x4 = 66MB/s. To use UATA/66, you need special
UATA/66 IDE cable.
UATA/100/133 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 UATA/100/133, you need spe-
cial 80-wire IDE cable, the same as UATA/66.
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