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winreSID

MOS 6581 / 8580 SID software emulation

This repository is a fork of the venerable reSID MOS6581 / MOS8580 SID emulator by Dag Lem, widely used in different incarnations.

Windows library

winreSID adds a simple C wrapper interface around reSID (C++) that makes it possible to conveniently use it in different emulators and applications as an optional DLL add-on.

Interface

sidCreate(unsigned int clock_type, unsigned int model, unsigned int replayFreq)

Create a SID instance with given clock_type (master clock frequency), model and replay frequency.

sidDestroy()

Destroy the SID instance

sidSetSampleRate(unsigned int sampleRate_)

Change replay frequency to sampleRate_. Note, this is the sound replay frequency of the host application.

sidSetModel(unsigned int model)

Set SID model to either 6581 (=0) or 8580 (!=0).

sidReset()

Resets the SID.

sidPause()

Pause the engine

sidWriteReg(unsigned int reg, unsigned char value)

Write 'value' to the SID register 'reg'.

unsigned char sidReadReg(unsigned int reg)

Read SID register 'reg'. Note, some SID registers are write-only. The A/D ports are not implemented.

sidCalcSamples(short* buf, long count)

Render 'count' samples to the sound buffer provided.

short sidCalcSample()

Clock the SID engine and return one SID sound sample with the original SID frequency.

sidSetAmp(unsigned int amp)

Set the amplification. Original SID output will be right shifted by this amount.

const char* sidGetLibVersion()

Get the reSID library version string.

Future plans

Plans include:

  • implement support for multiple instances
  • make it work as a Linux library
  • add proper library support for cycle based rendering into a buffer