This adapter allows you to connect the 8580 SID sound chip into devices designed for the 6581.Designed by Quazar in United Kingdom
I've a very long background in developing interfaces using the SID sound chip from the Commodore 64, first with an interface for the SAM Coupe computer way back in 2003 and most recently a module f...Read More…
I've a very long background in developing interfaces using the SID sound chip from the Commodore 64, first with an interface for the SAM Coupe computer way back in 2003 and most recently a module for the RC2014 DIY Z80 based computer system. It's such a great sound chip and as chiptune audiophiles we appreciate the audio differences between the 6581 and 8580 variants of the wondrous SID sound chip!
Due to different power and filter requirements the 6581 and 8580 the SIDs aren't interchangeable so I've developed this adapter board to allow a 8580 SID to plug into anything that was designed for the 6581 type. While not only applicable for the SID Interfaces I've produced myself, this adapter is designed to work in any other computer or interface to allow the 8580 to be used where a 6581 was originally, for example you could now use the 8580 in your 6581 based Commodore 64.
The adapter contains the circuitry for the exact requirements of the 8580, converting the 12V supply for the 6581 to 9V for the 8580, has the correct filter capacitors for the 8580. Plus also adds extra capacitance to the POTX and POTY paddle inputs as per the notes on Commodore's schematics for the C64.
The adapter has turned pins on the underside allowing it simply to plug into the chip socket in your device where the 6581 is fitted. Your 8580 SID sound chip is then plugged into the socket on the top side of the adapter. (If your 6581 is directly soldered to the circuit board you would have to desolder it and fit an IC socket in it's place for this adapter to then plug into.)
The adapter measures 37mm x 41mm in size, however the Quazar logo panel can be snapped/cut off taking the size down to 23 x 41mm. (It's handy for me to hold when building the adapters!). The board overhangs the right side of the original chip socket on the host device by 5mm, the full stack of adapter + 8580 SID comes to a height of 15mm above the socket on the host device. (I do not have any original Commodore 64 / SX64 computers to check the spacing / height clearance for fitting it inside of them.)
Supplied fully built and tested. Please note this listing is for the adapter only, you will have to have your own 8580 SID sound chip to use with it.
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