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https://github.com/reactos/reactos.git
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51 lines
1.1 KiB
C
51 lines
1.1 KiB
C
/*
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* COPYRIGHT: See COPYING in the top level directory
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* PROJECT: ReactOS kernel
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* FILE: drivers/dd/sound/mixer.c
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* PURPOSE: Wave Mixer?
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* PROGRAMMER: ?
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*
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* UPDATE HISTORY:
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* ??/??/??: Created
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* 10/23/02: Steven Edwards (Steven_Ed4153@yahoo.com)
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* Minor build fixes
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*/
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#include "sb16.h"
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#include "dsp.h"
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#include "mixer.h"
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unsigned char read_mixer(unsigned short base,unsigned char reg)
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{
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// outb(base+0x04,reg);
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// return inb(base+0x05);
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return 0;
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}
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unsigned char get_irq(SB16* sb16)
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{
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unsigned char irq;
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irq=(read_mixer(sb16->base,MIXER_INTERRUPT_SETUP_REGISTER)&0x0f);
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if(irq==1) sb16->irq=2;
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if(irq==2) sb16->irq=5;
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if(irq==4) sb16->irq=7;
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if(irq==8) sb16->irq=10;
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return 0;
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}
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void get_dma(SB16* sb16)
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{
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unsigned char hi,lo,result=read_mixer(sb16->base,MIXER_DMA_SETUP_REGISTER);
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hi=result&0xE0;
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lo=result&0x0B;
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if(hi==0x80) sb16->dma16=7;
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if(hi==0x40) sb16->dma16=6;
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if(hi==0x20) sb16->dma16=5;
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if(lo==0x08) sb16->dma8=3;
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if(lo==0x02) sb16->dma8=1;
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if(lo==0x01) sb16->dma8=0;
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}
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