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2 System Board
Devices on the ISA Bus
Audio Controller
The HP Kayak XA PC Workstation has an audio chip (AD1816) integrated
on the system board. This single chip is a Plug and Play multimedia audio
subsystem for concurrently processing multiple digital streams of 16-bit
stereo audio.
Host Interface The AD1816 audio chip contains all necessary ISA bus logic on chip. This
logic includes address decoding for all onboards resources, control and signal
interpretation, DMA selection and control logic, IRQ selection and control
logic, and all interface configuration logic.
Audio Chip
Specifications
It is driven from the ISA bus, and has the following specification:
Feature: Description:
Digitized Sounds • 16-bit and 8-bit stereo sampling from 4 kHz to 55.2 kHz
• Programmable sample rates with 1 Hz resolution
• Hardware Full Duplex Conversion
• 16-bit software-based real-time audio compression/
decompression system
Music Synthesizer • Integrated OPL3 compatible music synthesizer
Mixer • AC’97 and MPC-3 audio mixer
• Input mixing sources: microphone, LINE In,
CD Audio, AUX Audio, and digitized sounds
• Output mixing of all audio sources to the LINE Out or
integrated PC Workstation speaker
• Multiple source recording and Left/Right channels
swapping or mixing
Line Input • Input impedance: 15 kohms
• Input range: 0 to 2 Vpp
Line Output • Stereo output of 5 mW per channel with headphone
speakers (impedance >600 ohms)
Audio Front Panel • Microphone input jack
• Stereo output jack
• Master volume control potentiometer