Technical data

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