58
Pin
Signal
Pin
Signal
Pin
Signal
9
D01+(4)
23
DOIOW-
36
DA2
10
D01+(11)
24
Ground
37
CS1P-
11
D01+(3)
25
D0IOR-
38
CS3P-
12
D01+(12)
26
Ground
39
IDEACTVP-
13
D01+(2)
27
IORDY
40
Ground
14
D01+(13)
Sound Controller
The sound controller is the Crystal CS4236B from Crystal Labs. Integrated onto the system board,
the controller is a complete, full-featured PC 97 compliant sound implementation. The sound
controller has the following features and specifications:
Feature
Specification
Sound Controller
Crystal Labs CS4236B
Audio Resolution
16-bit
Sound Blaster Compatibility
PC 97
MIDI/UART Mode/Compatibility
Roland MPU401
Bus Interface
16-bit ISA
CODEC
Delta Sigma-based Windows Sound System
CODEC FIFO
16 Samples
FM Synthesizer
Crystal internal FM synthesis
External Audio Inputs
Microphone (Monaural), Stereo Line-In
Internal Audio Inputs
Stereo FM Synthesis, Stereo Wave Data, Stereo CD,
Monaural PC Speaker
Audio Outputs
Stereo Line-Out
MIDI/Joystick
MIDI In, MIDI Out, up to 4 fire buttons
ADPCM Audio Compression
4:1, 3:1, and 2:1
Sampling Rate Range
5 KHz - 44.1 KHz in 228 selectable steps
The Crystal CS4236B sound controller is configured entirely through I/O port accesses. When the
system is powered up, the hardware forces the Crystal CS4236B to respond to default I/O port
addresses, interrupt request (IRQ) level, and direct memory access (DMA) request and acknowledge.
The following table shows the default sound controller configurations and available programmable
settings.
Parameter
Default
Base I/O Address / MPU-401
220/330
8-bit Playback DMA
1
8-bit Capture DMA
3
Base IRQ / MPU IRQ
5/15
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