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Commodore 64/128


*Available with a C64 repair ONLY* MOS 6581 SID chip

*Available with a C64 repair ONLY* MOS 6581 SID chip
For purchase with a Commodore 64 repair ONLY

Please note: We have sourced these chips from many places, so you may receive a chip that looks different. Some of ours chips have been cleaned and/or remarked, or may be dirty from being in storage for many years, but ALL our chips are fully tested before sending.

MOS 6581 SID chip for the original shape Commodore 64 and the early models of 64C - tested and working, with all three voices and filters working, guaranteed!

The 6581 SID chip differs from the 8580 chips by the use of its filters and its internal volume control. The filters on these chips do not work quite as Commodore wanted the design to work, meaning tunes which play certain parts clearly on an 8580R5 will play very softly on a 6581 (this is a design flaw, not a fault in these chips). The volume control change means that there is a click when the volume changes - but as this "feature" is what creates speech effects on the 6581 chips, speech will normally play very well on a 6581 compared to an 8580R5.

This chip should only be used in the earlier C64s which use the 6581 (of any revision) chip - replacing an 8580 with an 6581 will not work, and may damage the 6581 as the power is wrong (6581 is 12 volts, 8580R5 is 9 volts).

Please note there are several revisions of the 6581 SID chip! If you are after a particular version please state when ordering and we will do our best to fulfil your preference. Of course if you want to know beforehand if we have a particular revision, you may contact us using the Contact Us form on the left.

Revisions we normally have in stock are:
  • 6581
  • 6581R3
  • 6581R4
  • 6581R4AR

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