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Intel High Definition Audio (IHDA) (also called HD Audio or development codename Azalia) is a specification for the audio sub-system of personal computers. It was released by Intel in 2004 as the successor to their AC'97 PC audio standard.
In July 2006, IDT acquired the PC Audio division of Austin-based company SigmaTel for $80 million. This included SigmaTel's designs, marketing and manufacturing rights for its products, and software drivers. IDT planned to maintain the production flow of the existing SigmaTel products as part of the purchase agreement. [18]
AC'97 (Audio Codec '97; also MC'97 for Modem Codec '97) is an audio codec standard developed by Intel Architecture Labs and various codec manufacturers in 1997. The standard was used in motherboards, modems, and sound cards.
The interrupt descriptor table (IDT) is a data structure used by the x86 architecture to implement an interrupt vector table. The IDT is used by the processor to determine the memory addresses of the handlers to be executed on interrupts and exceptions. The details in the description below apply specifically to the x86 architecture.
SigmaTel's AC'97 audio codec chip. SigmaTel, Inc., was an American system-on-a-chip (SoC), electronics and software company headquartered in Austin, Texas, that designed AV media player/recorder SoCs, reference circuit boards, SoC software development kit reference designs used to make media players for Apple iPod Shuffle, Samsung, Sony Walkman and 150 others built around a custom cooperative ...
However, since DOS and most DOS programs run in real mode (VCPI or DPMI makes a protected-mode program look like a real-mode program to DOS and the rest of the system by switching back and forth between the two modes), DOS TSRs and device drivers also run in real mode, and so any time one gets control, the DOS extender has to switch back to ...
An option ROM for the PC platform (i.e. the IBM PC and derived successor computer systems) is a piece of firmware that resides in ROM on an expansion card (or stored along with the main system BIOS), which gets executed to initialize the device and (optionally) add support for the device to the BIOS.
IDT Corporation [2] [3] (originally standing for International Discount Telecommunications) is a multinational provider of cloud communications, point of sale systems, unified communications, and financial services foreign exchange services for selected clients.
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