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33 lines
1.1 KiB
C
33 lines
1.1 KiB
C
/*
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SN76489 emulation
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by Maxim in 2001 and 2002
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converted from my original Delphi implementation
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I'm a C newbie so I'm sure there are loads of stupid things
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in here which I'll come back to some day and redo
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Includes:
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- Super-high quality tone channel "oversampling" by calculating fractional positions on transitions
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- Noise output pattern reverse engineered from actual SMS output
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- Volume levels taken from actual SMS output
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*/
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#ifndef _SN76489_H_
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#define _SN76489_H_
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/* Function prototypes */
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extern void SN76489_Init(int PSGClockValue, int SamplingRate);
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extern void SN76489_Reset(void);
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extern void SN76489_Shutdown(void);
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extern void SN76489_SetContext(uint8 *data);
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extern void SN76489_GetContext(uint8 *data);
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extern uint8 *SN76489_GetContextPtr(void);
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extern int SN76489_GetContextSize(void);
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extern void SN76489_Write(int data);
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extern void SN76489_Update(INT16 *buffer, int length);
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extern void SN76489_BoostNoise(int boost);
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extern void SN76489_Config(int mute, int volume, int feedback, int sr_width, int boost_noise);
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#endif /* _SN76489_H_ */
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