The world-famous original MOS 8580R5 or 6581 SID chip for the Commodore 64.
The sound of the two SID versions differs, partly due to differing filter capacitors, partly due to the greater number of possible waveform combinations with the newer SID.
Suitable for use with the new Commodore 64 Ultimate and Ultimate 64 etc!
Thoroughly soak-tested replacement SID chip for the Commodore 64
- 6581 is 12 volts and is suitable for "Longboards" from the C64 Breadbin/Breadbox
- 8580 R5 is 9 volts and is suitable for use on "Shortboards" C64c C64 MKII boards.
Way Too Much Technical Data
- 3 independent oscillators with ADSR control
- 4 waveforms: square, triangle, sawtooth, noise (can be mixed)
- High/low/band pass filters (can be mixed)
- 2 cascadable ring modulators
- Synchronisation of two oscillators
- 2 8-bit A/D converters
* Images are representative of chip supplied
* The 8580 SID chip should only be used in the later C64c -
Replacing a 6581 (from an original Breadbin)? Do not be tempted to install a 8580 SID into a long-board (breadbin) as you will damage it as the power is wrong (6581 is 12 volts, 8580R5 is 9 volts).
Genuine Original SID chips are also compatible with the Commodore 64 Ultimate and the Ultimate 64 range of boards.
A new low-cost replacement SID chip is available from us here.
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