Accurate replication of the original SID MOS6881 and MOS8580

• Exact reproduction of the digital sound generation part
• Spice simulation of the analog filters
• Advanced models for all 6581 non-linearities

Many extra features on top of the original SID

• FPGASID includes two fully functional SIDs for 6-voice stereo sound
• Perfect audio quality - much better than the original SID!
• Pseudo stereo mode mixes traditional tunes or game sounds to stereo
• Digitize the analog input to 8-bit samples (in your own software)
• Sample playback of 8-bit samples (in your own software)
• Nice light organ effect visible when mounted in transparent case
• Paddles readout even more accurate than the original SID

High compatibility

• Works in any C64/SX64 or C128
• Works with any software written for standard single SID computers
• Works with large existing software base for dual SID stereo tunes
• Paddle and 1351 Mouse support
• Analog input EXTIN fully supported (e.g. required for Magic Voice speech module)

Easy configuration with the software tool ConfiGuru

• Individual configuration of every SID
• Easy- and Expert configuration modes
• Save up to two configuration sets permanently in flash memory
• Easy update to new firmware directly on your C64
• Flexible address allocation of the second SID
• Diagnostic function to troubleshoot hardware problems

Easy installation

• Installation done in 20 minutes
  
• No soldering required for the all main features (except external configuration switch, when needed)
• Much smaller than traditional stereo boards thus avoiding installation trouble