Audio Subsystem
The crystal audio subsystem provides 16-bit stereo audio with
high-quality FM music synthesis using four operators per voice.
The Sound Blaster support function provides three system settings:
I/O address, IRQ level, and DMA channel.
Sound Blaster Support Function
Audio Port Specifications
Audio output:
–
⅛
-inch mini-jack for headphone
– Headphone speaker output: 22 mW (32
Ω
) maximum
– Maximum output level: 2.4 Vpp
– Output impedance: 75
Ω
Audio input:
–
⅛
-inch mini-jack for microphone or line input
– Microphone gain: 26 dB minimum, 48.5 dB maximum
– Maximum input level:
Microphone: 125 mVpp
Line In:
3.0 Vpp
– Input impedance:
Microphone:
47 k
Ω
Line In:
30 k
Ω
I/O Address
IRQ Level
DMA Channel
0220–022F (Default)
0240–024F
0338–033F (FM synthesizer)
IRQ 5 (Default)
IRQ 7
IRQ 10
IRQ 11
DMA 0
DMA 1 (Default)
–
–
ThinkPad 560Z Subsystems
3-5