Saturday, March 7, 2020

Alternative parts : New SRAM for C64C Short Boards

I've fixed quite a few C64C short boards now and nearly all of them have had bad RAM.  On Ebay the RAM for C64C's seems to be at a premium.  I got a great deal buying a RAM expansion board for a laptop with lots of socketed chips but was there a better alternate.

It turns out there is with Jamarju's c64-sram, SRAM substitute for C64C shortboards

So off to PCBway I went and grabbed some boards to test it out.



There aren't too many parts to this project which made it pretty simple to get going.  Probably the hardest bit was just getting the chips aligned on the pads.  After that I found if I was really careful I could just apply some flux and then very carefully drag solder down without tacking the corner pins first ( If it's your first time you should tack with chip down first to stop it moving ).

Although I did get a few bridges a bit more flux and some solder wick made clean up a breeze.

You can see in the middle the New vs the Old RAM.




  
My C64C boards nearly all have socket RAM now so I popped them out and jammed the board in and it worked first time. I quickly built a second one and that worked too.  I'm pretty happy about this project, a big thank you to Jamarju for sharing.




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