DualSID by Tomi Malinen Assembling and Testing
DualSID KIT by Tomi Malinen:
DualSID is a device which allows you to plug in two different SID models to your Commodore 64.
You can set the second SID‘s address to five different memory locations. For more information and price visit the Tomi Malinen homepage
Download: DualSID V3 PCB Scan (549)
I am just assembling one for myself. Your PLA looks interesting – why has it got pulled legs? And that Atmel chip – is that modified Kernal?
@Digger
Hi Digger,
Pla is a homebrew PLA with a EPROM, look here for better PLA solutions:
http://www.nightfallcrew.com/24/11/2010/unboxing-c64sx-pla-replacement-by-manosoft/
http://www.nightfallcrew.com/18/11/2009/xilink-cpld-xc9536-replacement-pla-for-commodore-64/
I have used a Atmel for make a multiKernel (Speeddos/Jiffy/Original/Original new Color)
Note that you can have the same kind of SID as well, name of the package is the SID you’re adding, order the 8580 kind means you’re adding a 8580.
I built mine yesterday after having it in the envelope for over two years… Some details have come up, the transistor is shown in the wrong direction on the white print, flat surface with markings should face towards the closest PCB edge, rounded side inwards. The E,C,B markings are correct but not the silhouette, it will work in the wrong position but it will be more quiet that the original.
To not get erratic behavior when address is set to normal and you’re using paddle inputs, the POTX and POTY of SID2 needs to be grounded.
The early description had wrong pinout of the C64C kernal chip, current one is correct, make sure you’re using the latest version from the homepage.
Looking forward to trying mine out today.